Merge branch 'main' into w2p-98211_advanced-workflow-actions-main

# Conflicts:
#	src/app/shared/shared.module.ts

config/config.example.yml

@@ -32,12 +32,60 @@ cache:
   # NOTE: how long should objects be cached for by default
   msToLive:
     default: 900000 # 15 minutes
-  control: max-age=60 # revalidate browser
+  # Default 'Cache-Control' HTTP Header to set for all static content (including compiled *.js files)
+  # Defaults to max-age=604,800 seconds (one week). This lets a user's browser know that it can cache these
+  # files for one week, after which they will be "stale" and need to be redownloaded.
+  # NOTE: When updates are made to compiled *.js files, it will automatically bypass this browser cache, because
+  # all compiled *.js files include a unique hash in their name which updates when content is modified.
+  control: max-age=604800 # revalidate browser
   autoSync:
     defaultTime: 0
     maxBufferSize: 100
     timePerMethod:
       PATCH: 3 # time in seconds
+  # In-memory cache(s) of server-side rendered pages. These caches will store the most recently accessed public pages.
+  # Pages are automatically added/dropped from these caches based on how recently they have been used.
+  # Restarting the app clears all page caches.
+  # NOTE: To control the cache size, use the "max" setting. Keep in mind, individual cached pages are usually small (<100KB).
+  # Enabling *both* caches will mean that a page may be cached twice, once in each cache (but may expire at different times via timeToLive).
+  serverSide:
+    # Set to true to see all cache hits/misses/refreshes in your console logs. Useful for debugging SSR caching issues.
+    debug: false
+    # When enabled (i.e. max > 0), known bots will be sent pages from a server side cache specific for bots.
+    # (Keep in mind, bot detection cannot be guarranteed. It is possible some bots will bypass this cache.)
+    botCache:
+      # Maximum number of pages to cache for known bots. Set to zero (0) to disable server side caching for bots.
+      # Default is 1000, which means the 1000 most recently accessed public pages will be cached.
+      # As all pages are cached in server memory, increasing this value will increase memory needs.
+      # Individual cached pages are usually small (<100KB), so max=1000 should only require ~100MB of memory.
+      max: 1000
+      # Amount of time after which cached pages are considered stale (in ms). After becoming stale, the cached
+      # copy is automatically refreshed on the next request.
+      # NOTE: For the bot cache, this setting may impact how quickly search engine bots will index new content on your site.
+      # For example, setting this to one week may mean that search engine bots may not find all new content for one week.
+      timeToLive: 86400000 # 1 day
+      # When set to true, after timeToLive expires, the next request will receive the *cached* page & then re-render the page
+      # behind the scenes to update the cache. This ensures users primarily interact with the cache, but may receive stale pages (older than timeToLive).
+      # When set to false, after timeToLive expires, the next request will wait on SSR to complete & receive a fresh page (which is then saved to cache).
+      # This ensures stale pages (older than timeToLive) are never returned from the cache, but some users will wait on SSR.
+      allowStale: true
+    # When enabled (i.e. max > 0), all anonymous users will be sent pages from a server side cache.
+    # This allows anonymous users to interact more quickly with the site, but also means they may see slightly
+    # outdated content (based on timeToLive)
+    anonymousCache:
+      # Maximum number of pages to cache. Default is zero (0) which means anonymous user cache is disabled.
+      # As all pages are cached in server memory, increasing this value will increase memory needs.
+      # Individual cached pages are usually small (<100KB), so a value of max=1000 would only require ~100MB of memory. 
+      max: 0
+      # Amount of time after which cached pages are considered stale (in ms). After becoming stale, the cached
+      # copy is automatically refreshed on the next request.
+      # NOTE: For the anonymous cache, it is recommended to keep this value low to avoid anonymous users seeing outdated content.
+      timeToLive: 10000 # 10 seconds
+      # When set to true, after timeToLive expires, the next request will receive the *cached* page & then re-render the page
+      # behind the scenes to update the cache. This ensures users primarily interact with the cache, but may receive stale pages (older than timeToLive).
+      # When set to false, after timeToLive expires, the next request will wait on SSR to complete & receive a fresh page (which is then saved to cache).
+      # This ensures stale pages (older than timeToLive) are never returned from the cache, but some users will wait on SSR.
+      allowStale: true
 
 # Authentication settings
 auth:
@@ -121,6 +169,9 @@ languages:
   - code: en
     label: English
     active: true
+  - code: ca
+    label: Català
+    active: true
   - code: cs
     label: Čeština
     active: true
@@ -310,3 +361,11 @@ info:
 markdown:
   enabled: false
   mathjax: false
+
+# Which vocabularies should be used for which search filters
+# and whether to show the filter in the search sidebar
+# Take a look at the filter-vocabulary-config.ts file for documentation on how the options are obtained
+vocabularies:
+  - filter: 'subject'
+    vocabulary: 'srsc'
+    enabled: true

package.json

@@ -93,11 +93,13 @@
     "date-fns": "^2.29.3",
     "date-fns-tz": "^1.3.7",
     "deepmerge": "^4.2.2",
+    "ejs": "^3.1.8",
     "express": "^4.17.1",
     "express-rate-limit": "^5.1.3",
     "fast-json-patch": "^3.0.0-1",
     "filesize": "^6.1.0",
     "http-proxy-middleware": "^1.0.5",
+    "isbot": "^3.6.5",
     "js-cookie": "2.2.1",
     "js-yaml": "^4.1.0",
     "json5": "^2.2.2",
@@ -105,6 +107,7 @@
     "jwt-decode": "^3.1.2",
     "klaro": "^0.7.18",
     "lodash": "^4.17.21",
+    "lru-cache": "^7.14.1",
     "markdown-it": "^13.0.1",
     "markdown-it-mathjax3": "^4.3.1",
     "mirador": "^3.3.0",
@@ -147,6 +150,7 @@
     "@ngtools/webpack": "^13.2.6",
     "@nguniversal/builders": "^13.1.1",
     "@types/deep-freeze": "0.1.2",
+    "@types/ejs": "^3.1.1",
     "@types/express": "^4.17.9",
     "@types/jasmine": "~3.6.0",
     "@types/js-cookie": "2.2.6",

server.ts

@@ -22,11 +22,14 @@ import 'rxjs';
 /* eslint-disable import/no-namespace */
 import * as morgan from 'morgan';
 import * as express from 'express';
+import * as ejs from 'ejs';
 import * as compression from 'compression';
 import * as expressStaticGzip from 'express-static-gzip';
 /* eslint-enable import/no-namespace */
 
 import axios from 'axios';
+import LRU from 'lru-cache';
+import isbot from 'isbot';
 import { createCertificate } from 'pem';
 import { createServer } from 'https';
 import { json } from 'body-parser';
@@ -34,7 +37,6 @@ import { json } from 'body-parser';
 import { existsSync, readFileSync } from 'fs';
 import { join } from 'path';
 
-import { APP_BASE_HREF } from '@angular/common';
 import { enableProdMode } from '@angular/core';
 
 import { ngExpressEngine } from '@nguniversal/express-engine';
@@ -52,6 +54,8 @@ import { buildAppConfig } from './src/config/config.server';
 import { APP_CONFIG, AppConfig } from './src/config/app-config.interface';
 import { extendEnvironmentWithAppConfig } from './src/config/config.util';
 import { logStartupMessage } from './startup-message';
+import { TOKENITEM } from 'src/app/core/auth/models/auth-token-info.model';
+
 
 /*
  * Set path for the browser application's dist folder
@@ -60,12 +64,18 @@ const DIST_FOLDER = join(process.cwd(), 'dist/browser');
 // Set path fir IIIF viewer.
 const IIIF_VIEWER = join(process.cwd(), 'dist/iiif');
 
-const indexHtml = existsSync(join(DIST_FOLDER, 'index.html')) ? 'index.html' : 'index';
+const indexHtml = join(DIST_FOLDER, 'index.html');
 
 const cookieParser = require('cookie-parser');
 
 const appConfig: AppConfig = buildAppConfig(join(DIST_FOLDER, 'assets/config.json'));
 
+// cache of SSR pages for known bots, only enabled in production mode
+let botCache: LRU<string, any>;
+
+// cache of SSR pages for anonymous users. Disabled by default, and only available in production mode
+let anonymousCache: LRU<string, any>;
+
 // extend environment with app config for server
 extendEnvironmentWithAppConfig(environment, appConfig);
 
@@ -86,10 +96,12 @@ export function app() {
   /*
    * If production mode is enabled in the environment file:
    * - Enable Angular's production mode
+   * - Initialize caching of SSR rendered pages (if enabled in config.yml)
    * - Enable compression for SSR reponses. See [compression](https://github.com/expressjs/compression)
    */
   if (environment.production) {
     enableProdMode();
+    initCache();
     server.use(compression({
       // only compress responses we've marked as SSR
       // otherwise, this middleware may compress files we've chosen not to compress via compression-webpack-plugin
@@ -105,13 +117,13 @@ export function app() {
 
   /*
    * Add cookie parser middleware
-   * See [morgan](https://github.com/expressjs/cookie-parser)
+   * See [cookie-parser](https://github.com/expressjs/cookie-parser)
    */
   server.use(cookieParser());
 
   /*
-   * Add parser for request bodies
+   * Add JSON parser for request bodies
-   * See [morgan](https://github.com/expressjs/body-parser)
+   * See [body-parser](https://github.com/expressjs/body-parser)
    */
   server.use(json());
 
@@ -136,10 +148,23 @@ export function app() {
     })(_, (options as any), callback)
   );
 
+  server.engine('ejs', ejs.renderFile);
+
   /*
    * Register the view engines for html and ejs
    */
   server.set('view engine', 'html');
+  server.set('view engine', 'ejs');
+
+  /**
+   * Serve the robots.txt ejs template, filling in the origin variable
+   */
+  server.get('/robots.txt', (req, res) => {
+    res.setHeader('content-type', 'text/plain');
+    res.render('assets/robots.txt.ejs', {
+      'origin': req.protocol + '://' + req.headers.host
+    });
+  });
 
   /*
    * Set views folder path to directory where template files are stored
@@ -172,7 +197,7 @@ export function app() {
    * Serve static resources (images, i18n messages, …)
    * Handle pre-compressed files with [express-static-gzip](https://github.com/tkoenig89/express-static-gzip)
    */
-  router.get('*.*', cacheControl, expressStaticGzip(DIST_FOLDER, {
+  router.get('*.*', addCacheControl, expressStaticGzip(DIST_FOLDER, {
     index: false,
     enableBrotli: true,
     orderPreference: ['br', 'gzip'],
@@ -188,8 +213,11 @@ export function app() {
    */
   server.get('/app/health', healthCheck);
 
-  // Register the ngApp callback function to handle incoming requests
+  /**
-  router.get('*', ngApp);
+   * Default sending all incoming requests to ngApp() function, after first checking for a cached
+   * copy of the page (see cacheCheck())
+   */
+  router.get('*', cacheCheck, ngApp);
 
   server.use(environment.ui.nameSpace, router);
 
@@ -201,6 +229,25 @@ export function app() {
  */
 function ngApp(req, res) {
   if (environment.universal.preboot) {
+    // Render the page to user via SSR (server side rendering)
+    serverSideRender(req, res);
+  } else {
+    // If preboot is disabled, just serve the client
+    console.log('Universal off, serving for direct client-side rendering (CSR)');
+    clientSideRender(req, res);
+  }
+}
+
+/**
+ * Render page content on server side using Angular SSR. By default this page content is
+ * returned to the user.
+ * @param req current request
+ * @param res current response
+ * @param sendToUser if true (default), send the rendered content to the user.
+ * If false, then only save this rendered content to the in-memory cache (to refresh cache).
+ */
+function serverSideRender(req, res, sendToUser: boolean = true) {
+  // Render the page via SSR (server side rendering)
   res.render(indexHtml, {
     req,
     res,
@@ -210,52 +257,215 @@ function ngApp(req, res) {
     baseUrl: environment.ui.nameSpace,
     originUrl: environment.ui.baseUrl,
     requestUrl: req.originalUrl,
-      providers: [{ provide: APP_BASE_HREF, useValue: req.baseUrl }]
   }, (err, data) => {
     if (hasNoValue(err) && hasValue(data)) {
-        res.locals.ssr = true;  // mark response as SSR
+      // save server side rendered page to cache (if any are enabled)
+      saveToCache(req, data);
+      if (sendToUser) {
+        res.locals.ssr = true;  // mark response as SSR (enables text compression)
+        // send rendered page to user
         res.send(data);
+      }
     } else if (hasValue(err) && err.code === 'ERR_HTTP_HEADERS_SENT') {
       // When this error occurs we can't fall back to CSR because the response has already been
       // sent. These errors occur for various reasons in universal, not all of which are in our
       // control to solve.
       console.warn('Warning [ERR_HTTP_HEADERS_SENT]: Tried to set headers after they were sent to the client');
     } else {
-        console.warn('Error in SSR, serving for direct CSR.');
+      console.warn('Error in server-side rendering (SSR)');
       if (hasValue(err)) {
         console.warn('Error details : ', err);
       }
-        res.render(indexHtml, {
+      if (sendToUser) {
-          req,
+        console.warn('Falling back to serving direct client-side rendering (CSR).');
-          providers: [{
+        clientSideRender(req, res);
-            provide: APP_BASE_HREF,
+      }
-            useValue: req.baseUrl
-          }]
-        });
     }
   });
-  } else {
+}
-    // If preboot is disabled, just serve the client
+
-    console.log('Universal off, serving for direct CSR');
+/**
-    res.render(indexHtml, {
+ * Send back response to user to trigger direct client-side rendering (CSR)
-      req,
+ * @param req current request
-      providers: [{
+ * @param res current response
-        provide: APP_BASE_HREF,
+ */
-        useValue: req.baseUrl
+function clientSideRender(req, res) {
-      }]
+  res.sendFile(indexHtml);
+}
+
+
+/*
+ * Adds a Cache-Control HTTP header to the response.
+ * The cache control value can be configured in the config.*.yml file
+ * Defaults to max-age=604,800 seconds (1 week)
+ */
+function addCacheControl(req, res, next) {
+  // instruct browser to revalidate
+  res.header('Cache-Control', environment.cache.control || 'max-age=604800');
+  next();
+}
+
+/*
+ * Initialize server-side caching of pages rendered via SSR.
+ */
+function initCache() {
+  if (botCacheEnabled()) {
+    // Initialize a new "least-recently-used" item cache (where least recently used pages are removed first)
+    // See https://www.npmjs.com/package/lru-cache
+    // When enabled, each page defaults to expiring after 1 day
+    botCache = new LRU( {
+      max: environment.cache.serverSide.botCache.max,
+      ttl: environment.cache.serverSide.botCache.timeToLive || 24 * 60 * 60 * 1000, // 1 day
+      allowStale: environment.cache.serverSide.botCache.allowStale ?? true // if object is stale, return stale value before deleting
+    });
+  }
+
+  if (anonymousCacheEnabled()) {
+    // NOTE: While caches may share SSR pages, this cache must be kept separately because the timeToLive
+    // may expire pages more frequently.
+    // When enabled, each page defaults to expiring after 10 seconds (to minimize anonymous users seeing out-of-date content)
+    anonymousCache = new LRU( {
+      max: environment.cache.serverSide.anonymousCache.max,
+      ttl: environment.cache.serverSide.anonymousCache.timeToLive || 10 * 1000, // 10 seconds
+      allowStale: environment.cache.serverSide.anonymousCache.allowStale ?? true // if object is stale, return stale value before deleting
     });
   }
 }
 
-/*
+/**
- * Adds a cache control header to the response
+ * Return whether bot-specific server side caching is enabled in configuration.
- * The cache control value can be configured in the environments file and defaults to max-age=60
  */
-function cacheControl(req, res, next) {
+function botCacheEnabled(): boolean {
-  // instruct browser to revalidate
+  // Caching is only enabled if SSR is enabled AND
-  res.header('Cache-Control', environment.cache.control || 'max-age=60');
+  // "max" pages to cache is greater than zero
+  return environment.universal.preboot && environment.cache.serverSide.botCache.max && (environment.cache.serverSide.botCache.max > 0);
+}
+
+/**
+ * Return whether anonymous user server side caching is enabled in configuration.
+ */
+function anonymousCacheEnabled(): boolean {
+  // Caching is only enabled if SSR is enabled AND
+  // "max" pages to cache is greater than zero
+  return environment.universal.preboot && environment.cache.serverSide.anonymousCache.max && (environment.cache.serverSide.anonymousCache.max > 0);
+}
+
+/**
+ * Check if the currently requested page is in our server-side, in-memory cache.
+ * Caching is ONLY done for SSR requests. Pages are cached base on their path (e.g. /home or /search?query=test)
+ */
+function cacheCheck(req, res, next) {
+  // Cached copy of page (if found)
+  let cachedCopy;
+
+  // If the bot cache is enabled and this request looks like a bot, check the bot cache for a cached page.
+  if (botCacheEnabled() && isbot(req.get('user-agent'))) {
+    cachedCopy = checkCacheForRequest('bot', botCache, req, res);
+  } else if (anonymousCacheEnabled() && !isUserAuthenticated(req)) {
+    cachedCopy = checkCacheForRequest('anonymous', anonymousCache, req, res);
+  }
+
+  // If cached copy exists, return it to the user.
+  if (cachedCopy) {
+    res.locals.ssr = true;  // mark response as SSR-generated (enables text compression)
+    res.send(cachedCopy);
+
+    // Tell Express to skip all other handlers for this path
+    // This ensures we don't try to re-render the page since we've already returned the cached copy
+    next('router');
+  } else {
+    // If nothing found in cache, just continue with next handler
+    // (This should send the request on to the handler that rerenders the page via SSR
     next();
   }
+}
+
+/**
+ * Checks if the current request (i.e. page) is found in the given cache. If it is found,
+ * the cached copy is returned. When found, this method also triggers a re-render via
+ * SSR if the cached copy is now expired (i.e. timeToLive has passed for this cached copy).
+ * @param cacheName name of cache (just useful for debug logging)
+ * @param cache LRU cache to check
+ * @param req current request to look for in the cache
+ * @param res current response
+ * @returns cached copy (if found) or undefined (if not found)
+ */
+function checkCacheForRequest(cacheName: string, cache: LRU<string, any>, req, res): any {
+  // Get the cache key for this request
+  const key = getCacheKey(req);
+
+  // Check if this page is in our cache
+  let cachedCopy = cache.get(key);
+  if (cachedCopy) {
+    if (environment.cache.serverSide.debug) { console.log(`CACHE HIT FOR ${key} in ${cacheName} cache`); }
+
+    // Check if cached copy is expired (If expired, the key will now be gone from cache)
+    // NOTE: This will only occur when "allowStale=true", as it means the "get(key)" above returned a stale value.
+    if (!cache.has(key)) {
+      if (environment.cache.serverSide.debug) { console.log(`CACHE EXPIRED FOR ${key} in ${cacheName} cache. Re-rendering...`); }
+      // Update cached copy by rerendering server-side
+      // NOTE: In this scenario the currently cached copy will be returned to the current user.
+      // This re-render is peformed behind the scenes to update cached copy for next user.
+      serverSideRender(req, res, false);
+    }
+  } else {
+    if (environment.cache.serverSide.debug) { console.log(`CACHE MISS FOR ${key} in ${cacheName} cache.`); }
+  }
+
+  // return page from cache
+  return cachedCopy;
+}
+
+/**
+ * Create a cache key from the current request.
+ * The cache key is the URL path (NOTE: this key will also include any querystring params).
+ * E.g. "/home" or "/search?query=test"
+ * @param req current request
+ * @returns cache key to use for this page
+ */
+function getCacheKey(req): string {
+  // NOTE: this will return the URL path *without* any baseUrl
+  return req.url;
+}
+
+/**
+ * Save page to server side cache(s), if enabled. If caching is not enabled or a user is authenticated, this is a noop
+ * If multiple caches are enabled, the page will be saved to any caches where it does not yet exist (or is expired).
+ * (This minimizes the number of times we need to run SSR on the same page.)
+ * @param req current page request
+ * @param page page data to save to cache
+ */
+function saveToCache(req, page: any) {
+  // Only cache if no one is currently authenticated. This means ONLY public pages can be cached.
+  // NOTE: It's not safe to save page data to the cache when a user is authenticated. In that situation,
+  // the page may include sensitive or user-specific materials. As the cache is shared across all users, it can only contain public info.
+  if (!isUserAuthenticated(req)) {
+    const key = getCacheKey(req);
+    // Avoid caching "/reload/[random]" paths (these are hard refreshes after logout)
+    if (key.startsWith('/reload')) { return; }
+
+    // If bot cache is enabled, save it to that cache if it doesn't exist or is expired
+    // (NOTE: has() will return false if page is expired in cache)
+    if (botCacheEnabled() && !botCache.has(key)) {
+      botCache.set(key, page);
+      if (environment.cache.serverSide.debug) { console.log(`CACHE SAVE FOR ${key} in bot cache.`); }
+    }
+
+    // If anonymous cache is enabled, save it to that cache if it doesn't exist or is expired
+    if (anonymousCacheEnabled() && !anonymousCache.has(key)) {
+      anonymousCache.set(key, page);
+      if (environment.cache.serverSide.debug) { console.log(`CACHE SAVE FOR ${key} in anonymous cache.`); }
+    }
+  }
+}
+
+/**
+ * Whether a user is authenticated or not
+ */
+function isUserAuthenticated(req): boolean {
+  // Check whether our DSpace authentication Cookie exists or not
+  return req.cookies[TOKENITEM];
+}
 
 /*
  * Callback function for when the server has started

src/app/access-control/group-registry/group-form/group-form.component.html

@@ -9,7 +9,18 @@
       </ng-template>
 
       <ng-template #editheader>
-        <h2 class="border-bottom pb-2">{{messagePrefix + '.head.edit' | translate}}</h2>
+        <h2 class="border-bottom pb-2">
+          <span
+            *dsContextHelp="{
+              content: 'admin.access-control.groups.form.tooltip.editGroupPage',
+              id: 'edit-group-page',
+              iconPlacement: 'right',
+              tooltipPlacement: ['right', 'bottom']
+            }"
+          >
+            {{messagePrefix + '.head.edit' | translate}}
+          </span>
+        </h2>
       </ng-template>
 
       <ds-alert *ngIf="groupBeingEdited?.permanent" [type]="AlertTypeEnum.Warning"

src/app/access-control/group-registry/group-form/group-form.component.spec.ts

@@ -266,6 +266,43 @@ describe('GroupFormComponent', () => {
         fixture.detectChanges();
       });
 
+      it('should edit with name and description operations', () => {
+        const operations = [{
+          op: 'add',
+          path: '/metadata/dc.description',
+          value: 'testDescription'
+        }, {
+          op: 'replace',
+          path: '/name',
+          value: 'newGroupName'
+        }];
+        expect(groupsDataServiceStub.patch).toHaveBeenCalledWith(expected, operations);
+      });
+
+      it('should edit with description operations', () => {
+        component.groupName.value = null;
+        component.onSubmit();
+        fixture.detectChanges();
+        const operations = [{
+          op: 'add',
+          path: '/metadata/dc.description',
+          value: 'testDescription'
+        }];
+        expect(groupsDataServiceStub.patch).toHaveBeenCalledWith(expected, operations);
+      });
+
+      it('should edit with name operations', () => {
+        component.groupDescription.value = null;
+        component.onSubmit();
+        fixture.detectChanges();
+        const operations = [{
+          op: 'replace',
+          path: '/name',
+          value: 'newGroupName'
+        }];
+        expect(groupsDataServiceStub.patch).toHaveBeenCalledWith(expected, operations);
+      });
+
       it('should emit the existing group using the correct new values', waitForAsync(() => {
         fixture.whenStable().then(() => {
           expect(component.submitForm.emit).toHaveBeenCalledWith(expected2);

src/app/access-control/group-registry/group-form/group-form.component.ts

@@ -346,8 +346,8 @@ export class GroupFormComponent implements OnInit, OnDestroy {
 
     if (hasValue(this.groupDescription.value)) {
       operations = [...operations, {
-        op: 'replace',
+        op: 'add',
-        path: '/metadata/dc.description/0/value',
+        path: '/metadata/dc.description',
         value: this.groupDescription.value
       }];
     }

src/app/access-control/group-registry/group-form/members-list/members-list.component.html

@@ -1,9 +1,19 @@
 <ng-container>
   <h3 class="border-bottom pb-2">{{messagePrefix + '.head' | translate}}</h3>
 
-  <h4 id="search" class="border-bottom pb-2">{{messagePrefix + '.search.head' | translate}}
+  <h4 id="search" class="border-bottom pb-2">
-
+    <span
+      *dsContextHelp="{
+        content: 'admin.access-control.groups.form.tooltip.editGroup.addEpeople',
+        id: 'edit-group-add-epeople',
+        iconPlacement: 'right',
+        tooltipPlacement: ['top', 'right', 'bottom']
+      }"
+    >
+      {{messagePrefix + '.search.head' | translate}}
+    </span>
   </h4>
+
   <form [formGroup]="searchForm" (ngSubmit)="search(searchForm.value)" class="d-flex justify-content-between">
     <div>
       <select name="scope" id="scope" formControlName="scope" class="form-control" aria-label="Search scope">

src/app/access-control/group-registry/group-form/subgroup-list/subgroups-list.component.html

@@ -1,7 +1,16 @@
 <ng-container>
   <h3 class="border-bottom pb-2">{{messagePrefix + '.head' | translate}}</h3>
 
-  <h4 id="search" class="border-bottom pb-2">{{messagePrefix + '.search.head' | translate}}
+  <h4 id="search" class="border-bottom pb-2">
+    <span *dsContextHelp="{
+            content: 'admin.access-control.groups.form.tooltip.editGroup.addSubgroups',
+            id: 'edit-group-add-subgroups',
+            iconPlacement: 'right',
+            tooltipPlacement: ['top', 'right', 'bottom']
+          }"
+    >
+      {{messagePrefix + '.search.head' | translate}}
+    </span>
 
   </h4>
   <form [formGroup]="searchForm" (ngSubmit)="search(searchForm.value)" class="d-flex justify-content-between">

src/app/admin/admin-routing.module.ts

@@ -47,6 +47,12 @@ import { BatchImportPageComponent } from './admin-import-batch-page/batch-import
         component: BatchImportPageComponent,
         data: { title: 'admin.batch-import.title', breadcrumbKey: 'admin.batch-import' }
       },
+      {
+        path: 'system-wide-alert',
+        resolve: { breadcrumb: I18nBreadcrumbResolver },
+        loadChildren: () => import('../system-wide-alert/system-wide-alert.module').then((m) => m.SystemWideAlertModule),
+        data: {title: 'admin.system-wide-alert.title', breadcrumbKey: 'admin.system-wide-alert'}
+      },
     ])
   ],
   providers: [

src/app/admin/admin-sidebar/admin-sidebar-section/admin-sidebar-section.component.html

@@ -1,7 +1,7 @@
 <div class="sidebar-section">
     <a class="nav-item nav-link d-flex flex-row flex-nowrap"
-       [ngClass]="{ disabled: !hasLink }"
+       [ngClass]="{ disabled: isDisabled }"
-       [attr.aria-disabled]="!hasLink"
+       [attr.aria-disabled]="isDisabled"
        [attr.aria-labelledby]="'sidebarName-' + section.id"
        [title]="('menu.section.icon.' + section.id) | translate"
        [routerLink]="itemModel.link"

src/app/admin/admin-sidebar/admin-sidebar-section/admin-sidebar-section.component.spec.ts

@@ -17,6 +17,8 @@ describe('AdminSidebarSectionComponent', () => {
   const menuService = new MenuServiceStub();
   const iconString = 'test';
 
+  describe('when not disabled', () => {
+
     beforeEach(waitForAsync(() => {
       TestBed.configureTestingModule({
         imports: [NoopAnimationsModule, RouterTestingModule, TranslateModule.forRoot()],
@@ -49,6 +51,52 @@ describe('AdminSidebarSectionComponent', () => {
       const icon = fixture.debugElement.query(By.css('.shortcut-icon')).query(By.css('i.fas'));
       expect(icon.nativeElement.getAttribute('class')).toContain('fa-' + iconString);
     });
+    it('should not contain the disabled class', () => {
+      const disabled = fixture.debugElement.query(By.css('.disabled'));
+      expect(disabled).toBeFalsy();
+    });
+
+  });
+  describe('when disabled', () => {
+
+    beforeEach(waitForAsync(() => {
+      TestBed.configureTestingModule({
+        imports: [NoopAnimationsModule, RouterTestingModule, TranslateModule.forRoot()],
+        declarations: [AdminSidebarSectionComponent, TestComponent],
+        providers: [
+          {provide: 'sectionDataProvider', useValue: {model: {link: 'google.com', disabled: true}, icon: iconString}},
+          {provide: MenuService, useValue: menuService},
+          {provide: CSSVariableService, useClass: CSSVariableServiceStub},
+        ]
+      }).overrideComponent(AdminSidebarSectionComponent, {
+        set: {
+          entryComponents: [TestComponent]
+        }
+      })
+        .compileComponents();
+    }));
+
+    beforeEach(() => {
+      fixture = TestBed.createComponent(AdminSidebarSectionComponent);
+      component = fixture.componentInstance;
+      spyOn(component as any, 'getMenuItemComponent').and.returnValue(TestComponent);
+      fixture.detectChanges();
+    });
+
+    it('should create', () => {
+      expect(component).toBeTruthy();
+    });
+
+    it('should set the right icon', () => {
+      const icon = fixture.debugElement.query(By.css('.shortcut-icon')).query(By.css('i.fas'));
+      expect(icon.nativeElement.getAttribute('class')).toContain('fa-' + iconString);
+    });
+    it('should contain the disabled class', () => {
+      const disabled = fixture.debugElement.query(By.css('.disabled'));
+      expect(disabled).toBeTruthy();
+    });
+  });
+
 });
 
 // declare a test component

src/app/admin/admin-sidebar/admin-sidebar-section/admin-sidebar-section.component.ts

@@ -5,7 +5,7 @@ import { rendersSectionForMenu } from '../../../shared/menu/menu-section.decorat
 import { LinkMenuItemModel } from '../../../shared/menu/menu-item/models/link.model';
 import { MenuSection } from '../../../shared/menu/menu-section.model';
 import { MenuID } from '../../../shared/menu/menu-id.model';
-import { isNotEmpty } from '../../../shared/empty.util';
+import { isEmpty } from '../../../shared/empty.util';
 import { Router } from '@angular/router';
 
 /**
@@ -26,7 +26,12 @@ export class AdminSidebarSectionComponent extends MenuSectionComponent implement
    */
   menuID: MenuID = MenuID.ADMIN;
   itemModel;
-  hasLink: boolean;
+
+  /**
+   * Boolean to indicate whether this section is disabled
+   */
+  isDisabled: boolean;
+
   constructor(
     @Inject('sectionDataProvider') menuSection: MenuSection,
     protected menuService: MenuService,
@@ -38,13 +43,13 @@ export class AdminSidebarSectionComponent extends MenuSectionComponent implement
   }
 
   ngOnInit(): void {
-    this.hasLink = isNotEmpty(this.itemModel?.link);
+    this.isDisabled = this.itemModel?.disabled || isEmpty(this.itemModel?.link);
     super.ngOnInit();
   }
 
   navigate(event: any): void {
     event.preventDefault();
-    if (this.hasLink) {
+    if (!this.isDisabled) {
       this.router.navigate(this.itemModel.link);
     }
   }

src/app/admin/admin-sidebar/admin-sidebar.component.ts

@@ -100,6 +100,7 @@ export class AdminSidebarComponent extends MenuComponent implements OnInit {
         }
       }
     });
+    this.menuVisible = this.menuService.isMenuVisibleWithVisibleSections(this.menuID);
   }
 
   @HostListener('focusin')

src/app/admin/admin-sidebar/expandable-admin-sidebar-section/expandable-admin-sidebar-section.component.html

@@ -7,6 +7,7 @@
      [attr.aria-labelledby]="'sidebarName-' + section.id"
      [attr.aria-expanded]="expanded | async"
      [title]="('menu.section.icon.' + section.id) | translate"
+       [class.disabled]="section.model?.disabled"
      (click)="toggleSection($event)"
      (keyup.space)="toggleSection($event)"
      (keyup.enter)="toggleSection($event)"

src/app/admin/admin-sidebar/expandable-admin-sidebar-section/expandable-admin-sidebar-section.component.spec.ts

@@ -23,7 +23,7 @@ describe('ExpandableAdminSidebarSectionComponent', () => {
       imports: [NoopAnimationsModule, TranslateModule.forRoot()],
       declarations: [ExpandableAdminSidebarSectionComponent, TestComponent],
       providers: [
-        { provide: 'sectionDataProvider', useValue: { icon: iconString } },
+        { provide: 'sectionDataProvider', useValue: { icon: iconString, model: {} } },
         { provide: MenuService, useValue: menuService },
         { provide: CSSVariableService, useClass: CSSVariableServiceStub },
         { provide: Router, useValue: new RouterStub() },

src/app/app.reducer.ts

@@ -47,6 +47,7 @@ import { truncatableReducer, TruncatablesState } from './shared/truncatable/trun
 import { ThemeState, themeReducer } from './shared/theme-support/theme.reducer';
 import { MenusState } from './shared/menu/menus-state.model';
 import { correlationIdReducer } from './correlation-id/correlation-id.reducer';
+import { contextHelpReducer, ContextHelpState } from './shared/context-help.reducer';
 
 export interface AppState {
   router: RouterReducerState;
@@ -67,6 +68,7 @@ export interface AppState {
   epeopleRegistry: EPeopleRegistryState;
   groupRegistry: GroupRegistryState;
   correlationId: string;
+  contextHelp: ContextHelpState;
 }
 
 export const appReducers: ActionReducerMap<AppState> = {
@@ -87,7 +89,8 @@ export const appReducers: ActionReducerMap<AppState> = {
   communityList: CommunityListReducer,
   epeopleRegistry: ePeopleRegistryReducer,
   groupRegistry: groupRegistryReducer,
-  correlationId: correlationIdReducer
+  correlationId: correlationIdReducer,
+  contextHelp: contextHelpReducer,
 };
 
 export const routerStateSelector = (state: AppState) => state.router;

src/app/browse-by/browse-by-date-page/browse-by-date-page.component.ts

@@ -65,6 +65,7 @@ export class BrowseByDatePageComponent extends BrowseByMetadataPageComponent {
         const searchOptions = browseParamsToOptions(params, currentPage, currentSort, this.browseId, this.fetchThumbnails);
         this.updatePageWithItems(searchOptions, this.value, undefined);
         this.updateParent(params.scope);
+        this.updateLogo();
         this.updateStartsWithOptions(this.browseId, metadataKeys, params.scope);
       }));
   }

src/app/browse-by/browse-by-metadata-page/browse-by-metadata-page.component.html

@@ -1,10 +1,17 @@
 <div class="container">
     <ng-container *ngVar="(parent$ | async) as parent">
     <ng-container *ngIf="parent?.payload as parentContext">
-    <header class="comcol-header border-bottom mb-4 pb-4">
+        <div class="d-flex flex-row border-bottom mb-4 pb-4">
+
+            <header class="comcol-header mr-auto">
         <!-- Parent Name -->
         <ds-comcol-page-header [name]="parentContext.name">
         </ds-comcol-page-header>
+      <!-- Collection logo -->
+        <ds-comcol-page-logo *ngIf="logo$"
+                             [logo]="(logo$ | async)?.payload"
+                             [alternateText]="'Community or Collection Logo'">
+        </ds-comcol-page-logo>
         <!-- Handle -->
         <ds-themed-comcol-page-handle
             [content]="parentContext.handle"
@@ -17,6 +24,8 @@
         <ds-comcol-page-content [content]="parentContext.sidebarText" [hasInnerHtml]="true" [title]="'community.page.news'">
         </ds-comcol-page-content>
       </header>
+        <ds-dso-edit-menu></ds-dso-edit-menu>
+        </div>
       <!-- Browse-By Links -->
       <ds-themed-comcol-page-browse-by [id]="parentContext.id" [contentType]="parentContext.type"></ds-themed-comcol-page-browse-by>
       </ng-container></ng-container>

src/app/browse-by/browse-by-metadata-page/browse-by-metadata-page.component.spec.ts

@@ -144,6 +144,9 @@ describe('BrowseByMetadataPageComponent', () => {
 
       route.params = observableOf(paramsWithValue);
       comp.ngOnInit();
+      comp.updateParent('fake-scope');
+      comp.updateLogo();
+      fixture.detectChanges();
     });
 
     it('should fetch items', () => {
@@ -151,6 +154,10 @@ describe('BrowseByMetadataPageComponent', () => {
         expect(result.payload.page).toEqual(mockItems);
       });
     });
+
+    it('should fetch the logo', () => {
+      expect(comp.logo$).toBeTruthy();
+    });
   });
 
   describe('when calling browseParamsToOptions', () => {

src/app/browse-by/browse-by-metadata-page/browse-by-metadata-page.component.ts

@@ -15,7 +15,11 @@ import { DSpaceObjectDataService } from '../../core/data/dspace-object-data.serv
 import { DSpaceObject } from '../../core/shared/dspace-object.model';
 import { StartsWithType } from '../../shared/starts-with/starts-with-decorator';
 import { PaginationService } from '../../core/pagination/pagination.service';
-import { map } from 'rxjs/operators';
+import { filter, map, mergeMap } from 'rxjs/operators';
+import { followLink, FollowLinkConfig } from '../../shared/utils/follow-link-config.model';
+import { Bitstream } from '../../core/shared/bitstream.model';
+import { Collection } from '../../core/shared/collection.model';
+import { Community } from '../../core/shared/community.model';
 import { APP_CONFIG, AppConfig } from '../../../config/app-config.interface';
 
 export const BBM_PAGINATION_ID = 'bbm';
@@ -48,6 +52,11 @@ export class BrowseByMetadataPageComponent implements OnInit, OnDestroy {
    */
   parent$: Observable<RemoteData<DSpaceObject>>;
 
+  /**
+   * The logo of the current Community or Collection
+   */
+  logo$: Observable<RemoteData<Bitstream>>;
+
   /**
    * The pagination config used to display the values
    */
@@ -151,6 +160,7 @@ export class BrowseByMetadataPageComponent implements OnInit, OnDestroy {
             this.updatePage(browseParamsToOptions(params, currentPage, currentSort, this.browseId, false));
           }
           this.updateParent(params.scope);
+          this.updateLogo();
         }));
     this.updateStartsWithTextOptions();
 
@@ -196,12 +206,31 @@ export class BrowseByMetadataPageComponent implements OnInit, OnDestroy {
    */
   updateParent(scope: string) {
     if (hasValue(scope)) {
-      this.parent$ = this.dsoService.findById(scope).pipe(
+      const linksToFollow = () => {
+        return [followLink('logo')];
+      };
+      this.parent$ = this.dsoService.findById(scope,
+        true,
+        true,
+        ...linksToFollow() as FollowLinkConfig<DSpaceObject>[]).pipe(
         getFirstSucceededRemoteData()
       );
     }
   }
 
+  /**
+   * Update the parent Community or Collection logo
+   */
+  updateLogo() {
+    if (hasValue(this.parent$)) {
+      this.logo$ = this.parent$.pipe(
+        map((rd: RemoteData<Collection | Community>) => rd.payload),
+        filter((collectionOrCommunity: Collection | Community) => hasValue(collectionOrCommunity.logo)),
+        mergeMap((collectionOrCommunity: Collection | Community) => collectionOrCommunity.logo)
+      );
+    }
+  }
+
   /**
    * Navigate to the previous page
    */

src/app/browse-by/browse-by-page.module.ts

@@ -4,16 +4,21 @@ import { BrowseByModule } from './browse-by.module';
 import { ItemDataService } from '../core/data/item-data.service';
 import { BrowseService } from '../core/browse/browse.service';
 import { BrowseByGuard } from './browse-by-guard';
+import { SharedBrowseByModule } from '../shared/browse-by/shared-browse-by.module';
 
 @NgModule({
   imports: [
+    SharedBrowseByModule,
     BrowseByRoutingModule,
-    BrowseByModule.withEntryComponents()
+    BrowseByModule.withEntryComponents(),
   ],
   providers: [
     ItemDataService,
     BrowseService,
-    BrowseByGuard
+    BrowseByGuard,
+  ],
+  declarations: [
+
   ]
 })
 export class BrowseByPageModule {

src/app/browse-by/browse-by-routing.module.ts

@@ -4,13 +4,17 @@ import { BrowseByGuard } from './browse-by-guard';
 import { BrowseByDSOBreadcrumbResolver } from './browse-by-dso-breadcrumb.resolver';
 import { BrowseByI18nBreadcrumbResolver } from './browse-by-i18n-breadcrumb.resolver';
 import { ThemedBrowseBySwitcherComponent } from './browse-by-switcher/themed-browse-by-switcher.component';
+import { DSOEditMenuResolver } from '../shared/dso-page/dso-edit-menu.resolver';
 
 @NgModule({
   imports: [
     RouterModule.forChild([
       {
         path: '',
-        resolve: { breadcrumb: BrowseByDSOBreadcrumbResolver },
+        resolve: {
+          breadcrumb: BrowseByDSOBreadcrumbResolver,
+          menu: DSOEditMenuResolver
+        },
         children: [
           {
             path: ':id',

src/app/browse-by/browse-by-title-page/browse-by-title-page.component.ts

@@ -49,6 +49,7 @@ export class BrowseByTitlePageComponent extends BrowseByMetadataPageComponent {
         this.browseId = params.id || this.defaultBrowseId;
         this.updatePageWithItems(browseParamsToOptions(params, currentPage, currentSort, this.browseId, this.fetchThumbnails), undefined, undefined);
         this.updateParent(params.scope);
+        this.updateLogo();
       }));
     this.updateStartsWithTextOptions();
   }

src/app/browse-by/browse-by.module.ts

@@ -1,7 +1,6 @@
 import { NgModule } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { BrowseByTitlePageComponent } from './browse-by-title-page/browse-by-title-page.component';
-import { SharedModule } from '../shared/shared.module';
 import { BrowseByMetadataPageComponent } from './browse-by-metadata-page/browse-by-metadata-page.component';
 import { BrowseByDatePageComponent } from './browse-by-date-page/browse-by-date-page.component';
 import { BrowseBySwitcherComponent } from './browse-by-switcher/browse-by-switcher.component';
@@ -10,6 +9,8 @@ import { ComcolModule } from '../shared/comcol/comcol.module';
 import { ThemedBrowseByMetadataPageComponent } from './browse-by-metadata-page/themed-browse-by-metadata-page.component';
 import { ThemedBrowseByDatePageComponent } from './browse-by-date-page/themed-browse-by-date-page.component';
 import { ThemedBrowseByTitlePageComponent } from './browse-by-title-page/themed-browse-by-title-page.component';
+import { SharedBrowseByModule } from '../shared/browse-by/shared-browse-by.module';
+import { DsoPageModule } from '../shared/dso-page/dso-page.module';
 
 const ENTRY_COMPONENTS = [
   // put only entry components that use custom decorator
@@ -25,9 +26,10 @@ const ENTRY_COMPONENTS = [
 
 @NgModule({
   imports: [
+    SharedBrowseByModule,
     CommonModule,
     ComcolModule,
-    SharedModule
+    DsoPageModule
   ],
   declarations: [
     BrowseBySwitcherComponent,
@@ -45,7 +47,7 @@ export class BrowseByModule {
    */
   static withEntryComponents() {
     return {
-      ngModule: SharedModule,
+      ngModule: SharedBrowseByModule,
       providers: ENTRY_COMPONENTS.map((component) => ({provide: component}))
     };
   }

src/app/collection-page/collection-page-routing.module.ts

@@ -21,6 +21,7 @@ import { CollectionPageAdministratorGuard } from './collection-page-administrato
 import { LinkMenuItemModel } from '../shared/menu/menu-item/models/link.model';
 import { ThemedCollectionPageComponent } from './themed-collection-page.component';
 import { MenuItemType } from '../shared/menu/menu-item-type.model';
+import { DSOEditMenuResolver } from '../shared/dso-page/dso-edit-menu.resolver';
 
 @NgModule({
   imports: [
@@ -34,7 +35,8 @@ import { MenuItemType } from '../shared/menu/menu-item-type.model';
         path: ':id',
         resolve: {
           dso: CollectionPageResolver,
-          breadcrumb: CollectionBreadcrumbResolver
+          breadcrumb: CollectionBreadcrumbResolver,
+          menu: DSOEditMenuResolver
         },
         runGuardsAndResolvers: 'always',
         children: [
@@ -91,7 +93,7 @@ import { MenuItemType } from '../shared/menu/menu-item-type.model';
     DSOBreadcrumbsService,
     LinkService,
     CreateCollectionPageGuard,
-    CollectionPageAdministratorGuard
+    CollectionPageAdministratorGuard,
   ]
 })
 export class CollectionPageRoutingModule {

src/app/collection-page/collection-page.component.html

@@ -33,9 +33,7 @@
                           [title]="'collection.page.news'">
                   </ds-comcol-page-content>
                 </header>
-                <div class="pl-2 space-children-mr">
+                  <ds-dso-edit-menu></ds-dso-edit-menu>
-                  <ds-dso-page-edit-button *ngIf="isCollectionAdmin$ | async"  [pageRoute]="collectionPageRoute$ | async" [dso]="collection" [tooltipMsg]="'collection.page.edit'"></ds-dso-page-edit-button>
-                </div>
               </div>
               <section class="comcol-page-browse-section">
               <!-- Browse-By Links -->

src/app/collection-page/collection-page.module.ts

@@ -16,6 +16,8 @@ import { StatisticsModule } from '../statistics/statistics.module';
 import { CollectionFormModule } from './collection-form/collection-form.module';
 import { ThemedCollectionPageComponent } from './themed-collection-page.component';
 import { ComcolModule } from '../shared/comcol/comcol.module';
+import { DsoSharedModule } from '../dso-shared/dso-shared.module';
+import { DsoPageModule } from '../shared/dso-page/dso-page.module';
 
 @NgModule({
   imports: [
@@ -26,6 +28,8 @@ import { ComcolModule } from '../shared/comcol/comcol.module';
     EditItemPageModule,
     CollectionFormModule,
     ComcolModule,
+    DsoSharedModule,
+    DsoPageModule,
   ],
   declarations: [
     CollectionPageComponent,

src/app/collection-page/edit-item-template-page/edit-item-template-page.component.html

@@ -3,7 +3,7 @@
     <div class="col-12" *ngVar="(itemRD$ | async) as itemRD">
       <ng-container *ngIf="itemRD?.hasSucceeded">
         <h2 class="border-bottom">{{ 'collection.edit.template.head' | translate:{ collection: collection?.name } }}</h2>
-        <ds-themed-item-metadata [updateService]="itemTemplateService" [item]="itemRD?.payload"></ds-themed-item-metadata>
+        <ds-themed-dso-edit-metadata [updateDataService]="itemTemplateService" [dso]="itemRD?.payload"></ds-themed-dso-edit-metadata>
         <button [routerLink]="getCollectionEditUrl(collection)" class="btn btn-outline-secondary">{{ 'collection.edit.template.cancel' | translate }}</button>
       </ng-container>
       <ds-themed-loading *ngIf="itemRD?.isLoading" [message]="'collection.edit.template.loading' | translate"></ds-themed-loading>

src/app/community-page/community-page-routing.module.ts

@@ -14,6 +14,7 @@ import { CommunityPageAdministratorGuard } from './community-page-administrator.
 import { LinkMenuItemModel } from '../shared/menu/menu-item/models/link.model';
 import { ThemedCommunityPageComponent } from './themed-community-page.component';
 import { MenuItemType } from '../shared/menu/menu-item-type.model';
+import { DSOEditMenuResolver } from '../shared/dso-page/dso-edit-menu.resolver';
 
 @NgModule({
   imports: [
@@ -27,7 +28,8 @@ import { MenuItemType } from '../shared/menu/menu-item-type.model';
         path: ':id',
         resolve: {
           dso: CommunityPageResolver,
-          breadcrumb: CommunityBreadcrumbResolver
+          breadcrumb: CommunityBreadcrumbResolver,
+          menu: DSOEditMenuResolver
         },
         runGuardsAndResolvers: 'always',
         children: [
@@ -73,7 +75,7 @@ import { MenuItemType } from '../shared/menu/menu-item-type.model';
     DSOBreadcrumbsService,
     LinkService,
     CreateCommunityPageGuard,
-    CommunityPageAdministratorGuard
+    CommunityPageAdministratorGuard,
   ]
 })
 export class CommunityPageRoutingModule {

src/app/community-page/community-page.component.html

@@ -20,9 +20,7 @@
             [title]="'community.page.news'">
           </ds-comcol-page-content>
         </header>
-        <div class="pl-2 space-children-mr">
+        <ds-dso-edit-menu></ds-dso-edit-menu>
-          <ds-dso-page-edit-button *ngIf="isCommunityAdmin$ | async" [pageRoute]="communityPageRoute$ | async" [dso]="communityPayload" [tooltipMsg]="'community.page.edit'"></ds-dso-page-edit-button>
-        </div>
       </div>
       <section class="comcol-page-browse-section">
 

src/app/community-page/community-page.module.ts

@@ -19,6 +19,7 @@ import {
 import {
   ThemedCollectionPageSubCollectionListComponent
 } from './sub-collection-list/themed-community-page-sub-collection-list.component';
+import { DsoPageModule } from '../shared/dso-page/dso-page.module';
 
 const DECLARATIONS = [CommunityPageComponent,
   ThemedCommunityPageComponent,
@@ -37,6 +38,7 @@ const DECLARATIONS = [CommunityPageComponent,
     StatisticsModule.forRoot(),
     CommunityFormModule,
     ComcolModule,
+    DsoPageModule,
   ],
   declarations: [
     ...DECLARATIONS

src/app/core/auth/auth-request.service.spec.ts

@@ -11,6 +11,7 @@ import { HttpOptions } from '../dspace-rest/dspace-rest.service';
 import objectContaining = jasmine.objectContaining;
 import { AuthStatus } from './models/auth-status.model';
 import { RestRequestMethod } from '../data/rest-request-method';
+import { Observable, of as observableOf } from 'rxjs';
 
 describe(`AuthRequestService`, () => {
   let halService: HALEndpointService;
@@ -34,8 +35,8 @@ describe(`AuthRequestService`, () => {
       super(hes, rs, rdbs);
     }
 
-    protected createShortLivedTokenRequest(href: string): PostRequest {
+    protected createShortLivedTokenRequest(href: string): Observable<PostRequest> {
-      return new PostRequest(this.requestService.generateRequestId(), href);
+      return observableOf(new PostRequest(this.requestService.generateRequestId(), href));
     }
   }
 

src/app/core/auth/auth-request.service.ts

@@ -100,14 +100,12 @@ export abstract class AuthRequestService {
     );
   }
   /**
-   * Factory function to create the request object to send. This needs to be a POST client side and
+   * Factory function to create the request object to send.
-   * a GET server side. Due to CSRF validation, the server isn't allowed to send a POST, so we allow
-   * only the server IP to send a GET to this endpoint.
    *
    * @param href The href to send the request to
    * @protected
    */
-  protected abstract createShortLivedTokenRequest(href: string): GetRequest | PostRequest;
+  protected abstract createShortLivedTokenRequest(href: string): Observable<PostRequest>;
 
   /**
    * Send a request to retrieve a short-lived token which provides download access of restricted files
@@ -117,7 +115,7 @@ export abstract class AuthRequestService {
       filter((href: string) => isNotEmpty(href)),
       distinctUntilChanged(),
       map((href: string) => new URLCombiner(href, this.shortlivedtokensEndpoint).toString()),
-      map((endpointURL: string) => this.createShortLivedTokenRequest(endpointURL)),
+      switchMap((endpointURL: string) => this.createShortLivedTokenRequest(endpointURL)),
       tap((request: RestRequest) => this.requestService.send(request)),
       switchMap((request: RestRequest) => this.rdbService.buildFromRequestUUID<ShortLivedToken>(request.uuid)),
       getFirstCompletedRemoteData(),

src/app/core/auth/browser-auth-request.service.spec.ts

@@ -1,6 +1,8 @@
 import { AuthRequestService } from './auth-request.service';
 import { RequestService } from '../data/request.service';
 import { BrowserAuthRequestService } from './browser-auth-request.service';
+import { Observable } from 'rxjs';
+import { PostRequest } from '../data/request.models';
 
 describe(`BrowserAuthRequestService`, () => {
   let href: string;
@@ -16,14 +18,20 @@ describe(`BrowserAuthRequestService`, () => {
   });
 
   describe(`createShortLivedTokenRequest`, () => {
-    it(`should return a PostRequest`, () => {
+    it(`should return a PostRequest`, (done) => {
-      const result = (service as any).createShortLivedTokenRequest(href);
+      const obs = (service as any).createShortLivedTokenRequest(href) as Observable<PostRequest>;
+      obs.subscribe((result: PostRequest) => {
         expect(result.constructor.name).toBe('PostRequest');
+        done();
+      });
     });
 
-    it(`should return a request with the given href`, () => {
+    it(`should return a request with the given href`, (done) => {
-      const result = (service as any).createShortLivedTokenRequest(href);
+      const obs = (service as any).createShortLivedTokenRequest(href) as Observable<PostRequest>;
+      obs.subscribe((result: PostRequest) => {
         expect(result.href).toBe(href);
+        done();
+      });
     });
   });
 });

src/app/core/auth/browser-auth-request.service.ts

@@ -4,6 +4,7 @@ import { PostRequest } from '../data/request.models';
 import { HALEndpointService } from '../shared/hal-endpoint.service';
 import { RequestService } from '../data/request.service';
 import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
+import { Observable, of as observableOf } from 'rxjs';
 
 /**
  * Client side version of the service to send authentication requests
@@ -20,15 +21,13 @@ export class BrowserAuthRequestService extends AuthRequestService {
   }
 
   /**
-   * Factory function to create the request object to send. This needs to be a POST client side and
+   * Factory function to create the request object to send.
-   * a GET server side. Due to CSRF validation, the server isn't allowed to send a POST, so we allow
-   * only the server IP to send a GET to this endpoint.
    *
    * @param href The href to send the request to
    * @protected
    */
-  protected createShortLivedTokenRequest(href: string): PostRequest {
+  protected createShortLivedTokenRequest(href: string): Observable<PostRequest> {
-    return new PostRequest(this.requestService.generateRequestId(), href);
+    return observableOf(new PostRequest(this.requestService.generateRequestId(), href));
   }
 
 }

src/app/core/auth/server-auth-request.service.spec.ts

@@ -1,34 +1,68 @@
 import { AuthRequestService } from './auth-request.service';
 import { RequestService } from '../data/request.service';
 import { ServerAuthRequestService } from './server-auth-request.service';
+import { HttpClient, HttpHeaders, HttpResponse } from '@angular/common/http';
+import { Observable, of as observableOf } from 'rxjs';
+import { HALEndpointService } from '../shared/hal-endpoint.service';
+import { PostRequest } from '../data/request.models';
+import {
+  XSRF_REQUEST_HEADER,
+  XSRF_RESPONSE_HEADER
+} from '../xsrf/xsrf.interceptor';
 
 describe(`ServerAuthRequestService`, () => {
   let href: string;
   let requestService: RequestService;
   let service: AuthRequestService;
+  let httpClient: HttpClient;
+  let httpResponse: HttpResponse<any>;
+  let halService: HALEndpointService;
+  const mockToken = 'mock-token';
 
   beforeEach(() => {
     href = 'https://rest.api/auth/shortlivedtokens';
     requestService = jasmine.createSpyObj('requestService', {
       'generateRequestId': '8bb0582d-5013-4337-af9c-763beb25aae2'
     });
-    service = new ServerAuthRequestService(null, requestService, null);
+    let headers = new HttpHeaders();
+    headers = headers.set(XSRF_RESPONSE_HEADER, mockToken);
+    httpResponse = {
+      body: { bar: false },
+      headers: headers,
+      statusText: '200'
+    } as HttpResponse<any>;
+    httpClient = jasmine.createSpyObj('httpClient', {
+      get: observableOf(httpResponse),
+    });
+    halService = jasmine.createSpyObj('halService', {
+      'getRootHref': '/api'
+    });
+    service = new ServerAuthRequestService(halService, requestService, null, httpClient);
   });
 
   describe(`createShortLivedTokenRequest`, () => {
-    it(`should return a GetRequest`, () => {
+    it(`should return a PostRequest`, (done) => {
-      const result = (service as any).createShortLivedTokenRequest(href);
+      const obs = (service as any).createShortLivedTokenRequest(href) as Observable<PostRequest>;
-      expect(result.constructor.name).toBe('GetRequest');
+      obs.subscribe((result: PostRequest) => {
+        expect(result.constructor.name).toBe('PostRequest');
+        done();
+      });
     });
 
-    it(`should return a request with the given href`, () => {
+    it(`should return a request with the given href`, (done) => {
-      const result = (service as any).createShortLivedTokenRequest(href);
+      const obs = (service as any).createShortLivedTokenRequest(href) as Observable<PostRequest>;
+      obs.subscribe((result: PostRequest) => {
         expect(result.href).toBe(href);
+        done();
+      });
     });
 
-    it(`should have a responseMsToLive of 2 seconds`, () => {
+    it(`should return a request with a xsrf header`, (done) => {
-      const result = (service as any).createShortLivedTokenRequest(href);
+      const obs = (service as any).createShortLivedTokenRequest(href) as Observable<PostRequest>;
-      expect(result.responseMsToLive).toBe(2 * 1000) ;
+      obs.subscribe((result: PostRequest) => {
+        expect(result.options.headers.get(XSRF_REQUEST_HEADER)).toBe(mockToken);
+        done();
+      });
     });
   });
 });

src/app/core/auth/server-auth-request.service.ts

@@ -1,9 +1,21 @@
 import { Injectable } from '@angular/core';
 import { AuthRequestService } from './auth-request.service';
-import { GetRequest } from '../data/request.models';
+import { PostRequest } from '../data/request.models';
 import { HALEndpointService } from '../shared/hal-endpoint.service';
 import { RequestService } from '../data/request.service';
 import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
+import {
+  HttpHeaders,
+  HttpClient,
+  HttpResponse
+} from '@angular/common/http';
+import {
+  XSRF_REQUEST_HEADER,
+  XSRF_RESPONSE_HEADER,
+  DSPACE_XSRF_COOKIE
+} from '../xsrf/xsrf.interceptor';
+import { map } from 'rxjs/operators';
+import { Observable } from 'rxjs';
 
 /**
  * Server side version of the service to send authentication requests
@@ -14,23 +26,42 @@ export class ServerAuthRequestService extends AuthRequestService {
   constructor(
     halService: HALEndpointService,
     requestService: RequestService,
-    rdbService: RemoteDataBuildService
+    rdbService: RemoteDataBuildService,
+    protected httpClient: HttpClient,
   ) {
     super(halService, requestService, rdbService);
   }
 
   /**
-   * Factory function to create the request object to send. This needs to be a POST client side and
+   * Factory function to create the request object to send.
-   * a GET server side. Due to CSRF validation, the server isn't allowed to send a POST, so we allow
-   * only the server IP to send a GET to this endpoint.
    *
    * @param href The href to send the request to
    * @protected
    */
-  protected createShortLivedTokenRequest(href: string): GetRequest {
+  protected createShortLivedTokenRequest(href: string): Observable<PostRequest> {
-    return Object.assign(new GetRequest(this.requestService.generateRequestId(), href), {
+    // First do a call to the root endpoint in order to get an XSRF token
-      responseMsToLive: 2 * 1000 // A short lived token is only valid for 2 seconds.
+    return this.httpClient.get(this.halService.getRootHref(), { observe: 'response' }).pipe(
-    });
+      // retrieve the XSRF token from the response header
+      map((response: HttpResponse<any>) => response.headers.get(XSRF_RESPONSE_HEADER)),
+      // Use that token to create an HttpHeaders object
+      map((xsrfToken: string) => new HttpHeaders()
+          .set('Content-Type', 'application/json; charset=utf-8')
+          // set the token as the XSRF header
+          .set(XSRF_REQUEST_HEADER, xsrfToken)
+          // and as the DSPACE-XSRF-COOKIE
+          .set('Cookie', `${DSPACE_XSRF_COOKIE}=${xsrfToken}`)),
+      map((headers: HttpHeaders) =>
+        // Create a new PostRequest using those headers and the given href
+        new PostRequest(
+          this.requestService.generateRequestId(),
+          href,
+          {},
+          {
+            headers: headers,
+          },
+        )
+      )
+    );
   }
 
 }

src/app/core/browse/browse-definition-data.service.spec.ts

@@ -2,27 +2,66 @@ import { BrowseDefinitionDataService } from './browse-definition-data.service';
 import { followLink } from '../../shared/utils/follow-link-config.model';
 import { EMPTY } from 'rxjs';
 import { FindListOptions } from '../data/find-list-options.model';
+import { getMockRemoteDataBuildService } from '../../shared/mocks/remote-data-build.service.mock';
+import { RequestService } from '../data/request.service';
+import { HALEndpointServiceStub } from '../../shared/testing/hal-endpoint-service.stub';
+import { getMockObjectCacheService } from '../../shared/mocks/object-cache.service.mock';
 
 describe(`BrowseDefinitionDataService`, () => {
+  let requestService: RequestService;
   let service: BrowseDefinitionDataService;
-  const findAllDataSpy = jasmine.createSpyObj('findAllData', {
+  let findAllDataSpy;
-    findAll: EMPTY,
+  let searchDataSpy;
-  });
+  const browsesEndpointURL = 'https://rest.api/browses';
+  const halService: any = new HALEndpointServiceStub(browsesEndpointURL);
+
   const options = new FindListOptions();
   const linksToFollow = [
     followLink('entries'),
     followLink('items')
   ];
 
+  function initTestService() {
+    return new BrowseDefinitionDataService(
+      requestService,
+      getMockRemoteDataBuildService(),
+      getMockObjectCacheService(),
+      halService,
+    );
+  }
+
   beforeEach(() => {
-    service = new BrowseDefinitionDataService(null, null, null, null);
+    service = initTestService();
+    findAllDataSpy = jasmine.createSpyObj('findAllData', {
+      findAll: EMPTY,
+    });
+    searchDataSpy = jasmine.createSpyObj('searchData', {
+      searchBy: EMPTY,
+      getSearchByHref: EMPTY,
+    });
     (service as any).findAllData = findAllDataSpy;
+    (service as any).searchData = searchDataSpy;
   });
 
+  describe('findByFields', () => {
+    it(`should call searchByHref on searchData`, () => {
+      service.findByFields(['test'], true, false, ...linksToFollow);
+      expect(searchDataSpy.getSearchByHref).toHaveBeenCalled();
+    });
+  });
+  describe('searchBy', () => {
+    it(`should call searchBy on searchData`, () => {
+      service.searchBy('test', options, true, false, ...linksToFollow);
+      expect(searchDataSpy.searchBy).toHaveBeenCalledWith('test', options, true, false, ...linksToFollow);
+    });
+  });
   describe(`findAll`, () => {
     it(`should call findAll on findAllData`, () => {
       service.findAll(options, true, false, ...linksToFollow);
       expect(findAllDataSpy.findAll).toHaveBeenCalledWith(options, true, false, ...linksToFollow);
     });
   });
+
+
+
 });

src/app/core/browse/browse-definition-data.service.ts

@@ -13,6 +13,8 @@ import { FindListOptions } from '../data/find-list-options.model';
 import { IdentifiableDataService } from '../data/base/identifiable-data.service';
 import { FindAllData, FindAllDataImpl } from '../data/base/find-all-data';
 import { dataService } from '../data/base/data-service.decorator';
+import { RequestParam } from '../cache/models/request-param.model';
+import { SearchData, SearchDataImpl } from '../data/base/search-data';
 
 /**
  * Data service responsible for retrieving browse definitions from the REST server
@@ -21,8 +23,9 @@ import { dataService } from '../data/base/data-service.decorator';
   providedIn: 'root',
 })
 @dataService(BROWSE_DEFINITION)
-export class BrowseDefinitionDataService extends IdentifiableDataService<BrowseDefinition> implements FindAllData<BrowseDefinition> {
+export class BrowseDefinitionDataService extends IdentifiableDataService<BrowseDefinition> implements FindAllData<BrowseDefinition>, SearchData<BrowseDefinition> {
   private findAllData: FindAllDataImpl<BrowseDefinition>;
+  private searchData: SearchDataImpl<BrowseDefinition>;
 
   constructor(
     protected requestService: RequestService,
@@ -31,7 +34,7 @@ export class BrowseDefinitionDataService extends IdentifiableDataService<BrowseD
     protected halService: HALEndpointService,
   ) {
     super('browses', requestService, rdbService, objectCache, halService);
-
+    this.searchData = new SearchDataImpl(this.linkPath, requestService, rdbService, objectCache, halService, this.responseMsToLive);
     this.findAllData = new FindAllDataImpl(this.linkPath, requestService, rdbService, objectCache, halService, this.responseMsToLive);
   }
 
@@ -52,5 +55,71 @@ export class BrowseDefinitionDataService extends IdentifiableDataService<BrowseD
   findAll(options: FindListOptions = {}, useCachedVersionIfAvailable = true, reRequestOnStale = true, ...linksToFollow: FollowLinkConfig<BrowseDefinition>[]): Observable<RemoteData<PaginatedList<BrowseDefinition>>> {
     return this.findAllData.findAll(options, useCachedVersionIfAvailable, reRequestOnStale, ...linksToFollow);
   }
+
+  /**
+   * Make a new FindListRequest with given search method
+   *
+   * @param searchMethod                The search method for the object
+   * @param options                     The [[FindListOptions]] object
+   * @param useCachedVersionIfAvailable If this is true, the request will only be sent if there's
+   *                                    no valid cached version. Defaults to true
+   * @param reRequestOnStale            Whether or not the request should automatically be re-
+   *                                    requested after the response becomes stale
+   * @param linksToFollow               List of {@link FollowLinkConfig} that indicate which
+   *                                    {@link HALLink}s should be automatically resolved
+   * @return {Observable<RemoteData<PaginatedList<T>>}
+   *    Return an observable that emits response from the server
+   */
+  public searchBy(searchMethod: string, options?: FindListOptions, useCachedVersionIfAvailable?: boolean, reRequestOnStale?: boolean, ...linksToFollow: FollowLinkConfig<BrowseDefinition>[]): Observable<RemoteData<PaginatedList<BrowseDefinition>>> {
+    return this.searchData.searchBy(searchMethod, options, useCachedVersionIfAvailable, reRequestOnStale, ...linksToFollow);
+  }
+
+  /**
+   * Create the HREF for a specific object's search method with given options object
+   *
+   * @param searchMethod The search method for the object
+   * @param options The [[FindListOptions]] object
+   * @return {Observable<string>}
+   *    Return an observable that emits created HREF
+   * @param linksToFollow   List of {@link FollowLinkConfig} that indicate which {@link HALLink}s should be automatically resolved
+   */
+  public getSearchByHref(searchMethod: string, options?: FindListOptions, ...linksToFollow: FollowLinkConfig<BrowseDefinition>[]): Observable<string> {
+    return this.searchData.getSearchByHref(searchMethod, options, ...linksToFollow);
+  }
+
+  /**
+   * Get the browse URL by providing a list of metadata keys. The first matching browse index definition
+   * for any of the fields is returned. This is used in eg. item page field component, which can be configured
+   * with several fields for a component like 'Author', and needs to know if and how to link the values
+   * to configured browse indices.
+   *
+   * @param fields  an array of field strings, eg. ['dc.contributor.author', 'dc.creator']
+   * @param useCachedVersionIfAvailable Override the data service useCachedVersionIfAvailable parameter (default: true)
+   * @param reRequestOnStale Override the data service reRequestOnStale parameter (default: true)
+   * @param linksToFollow Override the data service linksToFollow parameter (default: empty array)
+   */
+  findByFields(
+    fields: string[],
+    useCachedVersionIfAvailable = true,
+    reRequestOnStale = true,
+    ...linksToFollow: FollowLinkConfig<BrowseDefinition>[]
+  ): Observable<RemoteData<BrowseDefinition>> {
+    const searchParams = [];
+    searchParams.push(new RequestParam('fields', fields));
+
+    const hrefObs = this.getSearchByHref(
+      'byFields',
+      { searchParams },
+      ...linksToFollow
+    );
+
+    return this.findByHref(
+      hrefObs,
+      useCachedVersionIfAvailable,
+      reRequestOnStale,
+      ...linksToFollow,
+    );
+  }
+
 }
 

src/app/core/browse/browse.service.ts

@@ -19,9 +19,9 @@ import {
 } from '../shared/operators';
 import { URLCombiner } from '../url-combiner/url-combiner';
 import { BrowseEntrySearchOptions } from './browse-entry-search-options.model';
-import { BrowseDefinitionDataService } from './browse-definition-data.service';
 import { HrefOnlyDataService } from '../data/href-only-data.service';
 import { followLink, FollowLinkConfig } from '../../shared/utils/follow-link-config.model';
+import { BrowseDefinitionDataService } from './browse-definition-data.service';
 
 
 export const BROWSE_LINKS_TO_FOLLOW: FollowLinkConfig<BrowseEntry | Item>[] = [
@@ -35,7 +35,7 @@ export const BROWSE_LINKS_TO_FOLLOW: FollowLinkConfig<BrowseEntry | Item>[] = [
 export class BrowseService {
   protected linkPath = 'browses';
 
-  private static toSearchKeyArray(metadataKey: string): string[] {
+  public static toSearchKeyArray(metadataKey: string): string[] {
     const keyParts = metadataKey.split('.');
     const searchFor = [];
     searchFor.push('*');

src/app/core/core.effects.ts

@@ -7,7 +7,6 @@ import { ServerSyncBufferEffects } from './cache/server-sync-buffer.effects';
 import { ObjectUpdatesEffects } from './data/object-updates/object-updates.effects';
 import { RouteEffects } from './services/route.effects';
 import { RouterEffects } from './router/router.effects';
-import { MenuEffects } from '../shared/menu/menu.effects';
 
 export const coreEffects = [
   RequestEffects,
@@ -19,5 +18,4 @@ export const coreEffects = [
   ObjectUpdatesEffects,
   RouteEffects,
   RouterEffects,
-  MenuEffects
 ];

src/app/core/core.module.ts

@@ -173,6 +173,7 @@ import { OrcidHistory } from './orcid/model/orcid-history.model';
 import { OrcidAuthService } from './orcid/orcid-auth.service';
 import { VocabularyDataService } from './submission/vocabularies/vocabulary.data.service';
 import { VocabularyEntryDetailsDataService } from './submission/vocabularies/vocabulary-entry-details.data.service';
+import { IdentifierData } from '../shared/object-list/identifier-data/identifier-data.model';
 
 /**
  * When not in production, endpoint responses can be mocked for testing purposes
@@ -362,7 +363,8 @@ export const models =
     ResearcherProfile,
     OrcidQueue,
     OrcidHistory,
-    AccessStatusObject
+    AccessStatusObject,
+    IdentifierData,
   ];
 
 @NgModule({

src/app/core/data/array-move-change-analyzer.service.spec.ts

@@ -41,21 +41,28 @@ describe('ArrayMoveChangeAnalyzer', () => {
     ], new MoveTest(0, 3));
 
     testMove([
+      { op: 'move', from: '/2', path: '/3' },
       { op: 'move', from: '/0', path: '/3' },
-      { op: 'move', from: '/2', path: '/1' }
     ], new MoveTest(0, 3), new MoveTest(1, 2));
 
     testMove([
+      { op: 'move', from: '/3', path: '/4' },
       { op: 'move', from: '/0', path: '/1' },
-      { op: 'move', from: '/3', path: '/4' }
     ], new MoveTest(0, 1), new MoveTest(3, 4));
 
     testMove([], new MoveTest(0, 4), new MoveTest(4, 0));
 
     testMove([
+      { op: 'move', from: '/2', path: '/3' },
       { op: 'move', from: '/0', path: '/3' },
-      { op: 'move', from: '/2', path: '/1' }
     ], new MoveTest(0, 4), new MoveTest(1, 3), new MoveTest(2, 4));
+
+    testMove([
+      { op: 'move', from: '/3', path: '/4' },
+      { op: 'move', from: '/2', path: '/4' },
+      { op: 'move', from: '/1', path: '/3' },
+      { op: 'move', from: '/0', path: '/3' },
+    ], new MoveTest(4, 1), new MoveTest(4, 2), new MoveTest(0, 3));
   });
 
   describe('when some values are undefined (index 2 and 3)', () => {

src/app/core/data/array-move-change-analyzer.service.ts

@@ -16,22 +16,31 @@ export class ArrayMoveChangeAnalyzer<T> {
    * @param array2  The custom array to compare with the original
    */
   diff(array1: T[], array2: T[]): MoveOperation[] {
-    const result = [];
+    return this.getMoves(array1, array2).map((move) => Object.assign({
-    const moved = [...array1];
-    array1.forEach((value: T, index: number) => {
-      if (hasValue(value)) {
-        const otherIndex = array2.indexOf(value);
-        const movedIndex = moved.indexOf(value);
-        if (index !== otherIndex && movedIndex !== otherIndex) {
-          moveItemInArray(moved, movedIndex, otherIndex);
-          result.push(Object.assign({
       op: 'move',
-            from: '/' + movedIndex,
+      from: '/' + move[0],
-            path: '/' + otherIndex
+      path: '/' + move[1],
     }) as MoveOperation);
   }
+
+  /**
+   * Determine a set of moves required to transform array1 into array2
+   * The moves are returned as an array of pairs of numbers where the first number is the original index and the second
+   * is the new index
+   * It is assumed the operations are executed in the order they're returned (and not simultaneously)
+   * @param array1
+   * @param array2
+   */
+  private getMoves(array1: any[], array2: any[]): number[][] {
+    const moved = [...array2];
+
+    return array1.reduce((moves, item, index) => {
+      if (hasValue(item) && item !== moved[index]) {
+        const last = moved.lastIndexOf(item);
+        moveItemInArray(moved, last, index);
+        moves.unshift([index, last]);
       }
-    });
+      return moves;
-    return result;
+    }, []);
   }
 }

src/app/core/data/eperson-registration.service.ts

@@ -14,6 +14,7 @@ import { RemoteData } from './remote-data';
 import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
 import { HttpOptions } from '../dspace-rest/dspace-rest.service';
 import { HttpHeaders } from '@angular/common/http';
+import { HttpParams } from '@angular/common/http';
 
 @Injectable({
   providedIn: 'root',
@@ -55,7 +56,7 @@ export class EpersonRegistrationService {
    * @param email
    * @param captchaToken the value of x-recaptcha-token header
    */
-  registerEmail(email: string, captchaToken: string = null): Observable<RemoteData<Registration>> {
+  registerEmail(email: string, captchaToken: string = null, type?: string): Observable<RemoteData<Registration>> {
     const registration = new Registration();
     registration.email = email;
 
@@ -70,6 +71,11 @@ export class EpersonRegistrationService {
     }
     options.headers = headers;
 
+    if (hasValue(type)) {
+      options.params = type ?
+        new HttpParams({ fromString: 'accountRequestType=' + type }) : new HttpParams();
+    }
+
     href$.pipe(
       find((href: string) => hasValue(href)),
       map((href: string) => {

src/app/core/data/feature-authorization/feature-id.ts

@@ -29,5 +29,8 @@ export enum FeatureID {
   CanViewUsageStatistics = 'canViewUsageStatistics',
   CanSendFeedback = 'canSendFeedback',
   CanClaimItem = 'canClaimItem',
-  CanSynchronizeWithORCID = 'canSynchronizeWithORCID'
+  CanSynchronizeWithORCID = 'canSynchronizeWithORCID',
+  CanSubmit = 'canSubmit',
+  CanEditItem = 'canEditItem',
+  CanRegisterDOI = 'canRegisterDOI',
 }

src/app/core/data/identifier-data.service.ts

@@ -0,0 +1,85 @@
+import { HttpClient, HttpHeaders, HttpParams } from '@angular/common/http';
+import { Injectable } from '@angular/core';
+import { Store } from '@ngrx/store';
+import { NotificationsService } from '../../shared/notifications/notifications.service';
+import { dataService } from './base/data-service.decorator';
+import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
+import { ObjectCacheService } from '../cache/object-cache.service';
+import { HALEndpointService } from '../shared/hal-endpoint.service';
+import { BaseDataService } from './base/base-data.service';
+import { RequestService } from './request.service';
+import { DefaultChangeAnalyzer } from './default-change-analyzer.service';
+import { CoreState } from '../core-state.model';
+import { Observable } from 'rxjs';
+import { RemoteData } from './remote-data';
+import { Item } from '../shared/item.model';
+import { IDENTIFIERS } from '../../shared/object-list/identifier-data/identifier-data.resource-type';
+import { IdentifierData } from '../../shared/object-list/identifier-data/identifier-data.model';
+import { getFirstCompletedRemoteData } from '../shared/operators';
+import { map, switchMap } from 'rxjs/operators';
+import {ConfigurationProperty} from '../shared/configuration-property.model';
+import {ConfigurationDataService} from './configuration-data.service';
+import { HttpOptions } from '../dspace-rest/dspace-rest.service';
+import { PostRequest } from './request.models';
+import { sendRequest } from '../shared/request.operators';
+import { RestRequest } from './rest-request.model';
+
+/**
+ * The service handling all REST requests to get item identifiers like handles and DOIs
+ * from the /identifiers endpoint, as well as the backend configuration that controls whether a 'Register DOI'
+ * button appears for admins in the item status page
+ */
+@Injectable()
+@dataService(IDENTIFIERS)
+export class IdentifierDataService extends BaseDataService<IdentifierData> {
+
+  constructor(
+    protected comparator: DefaultChangeAnalyzer<IdentifierData>,
+    protected halService: HALEndpointService,
+    protected http: HttpClient,
+    protected notificationsService: NotificationsService,
+    protected objectCache: ObjectCacheService,
+    protected rdbService: RemoteDataBuildService,
+    protected requestService: RequestService,
+    protected store: Store<CoreState>,
+    private configurationService: ConfigurationDataService,
+  ) {
+    super('identifiers', requestService, rdbService, objectCache, halService);
+  }
+
+  /**
+   * Returns {@link RemoteData} of {@link IdentifierData} representing identifiers for this item
+   * @param item  Item we are querying
+   */
+  getIdentifierDataFor(item: Item): Observable<RemoteData<IdentifierData>> {
+    return this.findByHref(item._links.identifiers.href, false, true);
+  }
+
+  /**
+   * Should we allow registration of new DOIs via the item status page?
+   */
+  public getIdentifierRegistrationConfiguration(): Observable<string[]> {
+    return this.configurationService.findByPropertyName('identifiers.item-status.register-doi').pipe(
+      getFirstCompletedRemoteData(),
+      map((propertyRD: RemoteData<ConfigurationProperty>) => propertyRD.hasSucceeded ? propertyRD.payload.values : [])
+    );
+  }
+
+  public registerIdentifier(item: Item, type: string): Observable<RemoteData<any>> {
+    const requestId = this.requestService.generateRequestId();
+    return this.getEndpoint().pipe(
+      map((endpointURL: string) => {
+        const options: HttpOptions = Object.create({});
+        let headers = new HttpHeaders();
+        headers = headers.append('Content-Type', 'text/uri-list');
+        options.headers = headers;
+        let params = new HttpParams();
+        params = params.append('type', type);
+        options.params = params;
+        return new PostRequest(requestId, endpointURL, item._links.self.href, options);
+      }),
+      sendRequest(this.requestService),
+      switchMap((request: RestRequest) => this.rdbService.buildFromRequestUUID(request.uuid) as Observable<RemoteData<any>>)
+    );
+  }
+}

src/app/core/data/item-data.service.ts

@@ -232,6 +232,16 @@ export abstract class BaseItemDataService extends IdentifiableDataService<Item>
     return this.rdbService.buildFromRequestUUID(requestId);
   }
 
+  /**
+   * Get the endpoint for an item's identifiers
+   * @param itemId
+   */
+  public getIdentifiersEndpoint(itemId: string): Observable<string> {
+    return this.halService.getEndpoint(this.linkPath).pipe(
+      switchMap((url: string) => this.halService.getEndpoint('identifiers', `${url}/${itemId}`))
+    );
+  }
+
   /**
    * Get the endpoint to move the item
    * @param itemId

src/app/core/data/object-updates/patch-operation-service/operations/metadata/metadata-patch-move-operation.model.ts

@@ -0,0 +1,33 @@
+import { MetadataPatchOperation } from './metadata-patch-operation.model';
+import { Operation } from 'fast-json-patch';
+
+/**
+ * Wrapper object for a metadata patch move Operation
+ */
+export class MetadataPatchMoveOperation extends MetadataPatchOperation {
+  static operationType = 'move';
+
+  /**
+   * The original place of the metadata value to move
+   */
+  from: number;
+
+  /**
+   * The new place to move the metadata value to
+   */
+  to: number;
+
+  constructor(field: string, from: number, to: number) {
+    super(MetadataPatchMoveOperation.operationType, field);
+    this.from = from;
+    this.to = to;
+  }
+
+  /**
+   * Transform the MetadataPatchOperation into a fast-json-patch Operation by constructing its path and other properties
+   * using the information provided.
+   */
+  toOperation(): Operation {
+    return { op: this.op as any, from: `/metadata/${this.field}/${this.from}`, path: `/metadata/${this.field}/${this.to}` };
+  }
+}

src/app/core/data/relationship-data.service.spec.ts

@@ -10,13 +10,19 @@ import { DeleteRequest } from './request.models';
 import { RelationshipDataService } from './relationship-data.service';
 import { RequestService } from './request.service';
 import { HALEndpointServiceStub } from '../../shared/testing/hal-endpoint-service.stub';
-import { createSuccessfulRemoteDataObject, createSuccessfulRemoteDataObject$ } from '../../shared/remote-data.utils';
+import {
+  createFailedRemoteDataObject$,
+  createSuccessfulRemoteDataObject,
+  createSuccessfulRemoteDataObject$
+} from '../../shared/remote-data.utils';
 import { getMockRemoteDataBuildServiceHrefMap } from '../../shared/mocks/remote-data-build.service.mock';
 import { getMockRequestService } from '../../shared/mocks/request.service.mock';
 import { createPaginatedList } from '../../shared/testing/utils.test';
 import { RequestEntry } from './request-entry.model';
 import { FindListOptions } from './find-list-options.model';
 import { testSearchDataImplementation } from './base/search-data.spec';
+import { MetadataValue } from '../shared/metadata.models';
+import { MetadataRepresentationType } from '../shared/metadata-representation/metadata-representation.model';
 
 describe('RelationshipDataService', () => {
   let service: RelationshipDataService;
@@ -233,4 +239,152 @@ describe('RelationshipDataService', () => {
       });
     });
   });
+
+  describe('resolveMetadataRepresentation', () => {
+    const parentItem: Item = Object.assign(new Item(), {
+      id: 'parent-item',
+      metadata: {
+        'dc.contributor.author': [
+          Object.assign(new MetadataValue(), {
+            language: null,
+            value: 'Related Author with authority',
+            authority: 'virtual::related-author',
+            place: 2
+          }),
+          Object.assign(new MetadataValue(), {
+            language: null,
+            value: 'Author without authority',
+            place: 1
+          }),
+        ],
+        'dc.creator': [
+          Object.assign(new MetadataValue(), {
+            language: null,
+            value: 'Related Creator with authority',
+            authority: 'virtual::related-creator',
+            place: 3,
+          }),
+            Object.assign(new MetadataValue(), {
+            language: null,
+            value: 'Related Creator with authority - unauthorized',
+            authority: 'virtual::related-creator-unauthorized',
+            place: 4,
+          }),
+        ],
+        'dc.title': [
+          Object.assign(new MetadataValue(), {
+            language: null,
+            value: 'Parent Item'
+          }),
+        ]
+      }
+    });
+    const relatedAuthor: Item = Object.assign(new Item(), {
+      id: 'related-author',
+      metadata: {
+        'dc.title': [
+          Object.assign(new MetadataValue(), {
+            language: null,
+            value: 'Related Author'
+          }),
+        ]
+      }
+    });
+    const relatedCreator: Item = Object.assign(new Item(), {
+      id: 'related-creator',
+      metadata: {
+        'dc.title': [
+          Object.assign(new MetadataValue(), {
+            language: null,
+            value: 'Related Creator'
+          }),
+        ],
+        'dspace.entity.type': 'Person',
+      }
+    });
+    const authorRelation: Relationship = Object.assign(new Relationship(), {
+      leftItem: createSuccessfulRemoteDataObject$(parentItem),
+      rightItem: createSuccessfulRemoteDataObject$(relatedAuthor)
+    });
+    const creatorRelation: Relationship = Object.assign(new Relationship(), {
+      leftItem: createSuccessfulRemoteDataObject$(parentItem),
+      rightItem: createSuccessfulRemoteDataObject$(relatedCreator),
+    });
+    const creatorRelationUnauthorized: Relationship = Object.assign(new Relationship(), {
+      leftItem: createSuccessfulRemoteDataObject$(parentItem),
+      rightItem: createFailedRemoteDataObject$('Unauthorized', 401),
+    });
+
+    let metadatum: MetadataValue;
+
+    beforeEach(() => {
+      service.findById = (id: string) => {
+        if (id === 'related-author') {
+          return createSuccessfulRemoteDataObject$(authorRelation);
+        }
+        if (id === 'related-creator') {
+          return createSuccessfulRemoteDataObject$(creatorRelation);
+        }
+        if (id === 'related-creator-unauthorized') {
+          return createSuccessfulRemoteDataObject$(creatorRelationUnauthorized);
+        }
+      };
+    });
+
+    describe('when the metadata isn\'t virtual', () => {
+      beforeEach(() => {
+        metadatum = parentItem.metadata['dc.contributor.author'][1];
+      });
+
+      it('should return a plain text MetadatumRepresentation', (done) => {
+        service.resolveMetadataRepresentation(metadatum, parentItem, 'Person').subscribe((result) => {
+          expect(result.representationType).toEqual(MetadataRepresentationType.PlainText);
+          done();
+        });
+      });
+    });
+
+    describe('when the metadata is a virtual author', () => {
+      beforeEach(() => {
+        metadatum = parentItem.metadata['dc.contributor.author'][0];
+      });
+
+      it('should return a ItemMetadataRepresentation with the correct value', (done) => {
+        service.resolveMetadataRepresentation(metadatum, parentItem, 'Person').subscribe((result) => {
+          expect(result.representationType).toEqual(MetadataRepresentationType.Item);
+          expect(result.getValue()).toEqual(metadatum.value);
+          expect((result as any).id).toEqual(relatedAuthor.id);
+          done();
+        });
+      });
+    });
+
+    describe('when the metadata is a virtual creator', () => {
+      beforeEach(() => {
+        metadatum = parentItem.metadata['dc.creator'][0];
+      });
+
+      it('should return a ItemMetadataRepresentation with the correct value', (done) => {
+        service.resolveMetadataRepresentation(metadatum, parentItem, 'Person').subscribe((result) => {
+          expect(result.representationType).toEqual(MetadataRepresentationType.Item);
+          expect(result.getValue()).toEqual(metadatum.value);
+          expect((result as any).id).toEqual(relatedCreator.id);
+          done();
+        });
+      });
+    });
+
+    describe('when the metadata refers to a relationship leading to an error response', () => {
+      beforeEach(() => {
+        metadatum = parentItem.metadata['dc.creator'][1];
+      });
+
+      it('should return an authority controlled MetadatumRepresentation', (done) => {
+        service.resolveMetadataRepresentation(metadatum, parentItem, 'Person').subscribe((result) => {
+          expect(result.representationType).toEqual(MetadataRepresentationType.AuthorityControlled);
+          done();
+        });
+      });
+    });
+  });
 });

src/app/core/data/relationship-data.service.ts

@@ -1,7 +1,7 @@
 import { HttpHeaders } from '@angular/common/http';
 import { Inject, Injectable } from '@angular/core';
 import { MemoizedSelector, select, Store } from '@ngrx/store';
-import { combineLatest as observableCombineLatest, Observable } from 'rxjs';
+import { combineLatest as observableCombineLatest, Observable, of as observableOf } from 'rxjs';
 import { distinctUntilChanged, filter, map, mergeMap, startWith, switchMap, take, tap } from 'rxjs/operators';
 import {
   compareArraysUsingIds, PAGINATED_RELATIONS_TO_ITEMS_OPERATOR,
@@ -46,6 +46,11 @@ import { PutData, PutDataImpl } from './base/put-data';
 import { IdentifiableDataService } from './base/identifiable-data.service';
 import { dataService } from './base/data-service.decorator';
 import { itemLinksToFollow } from '../../shared/utils/relation-query.utils';
+import { MetadataValue } from '../shared/metadata.models';
+import { MetadataRepresentation } from '../shared/metadata-representation/metadata-representation.model';
+import { MetadatumRepresentation } from '../shared/metadata-representation/metadatum/metadatum-representation.model';
+import { ItemMetadataRepresentation } from '../shared/metadata-representation/item/item-metadata-representation.model';
+import { DSpaceObject } from '../shared/dspace-object.model';
 
 const relationshipListsStateSelector = (state: AppState) => state.relationshipLists;
 
@@ -550,4 +555,40 @@ export class RelationshipDataService extends IdentifiableDataService<Relationshi
   searchBy(searchMethod: string, options?: FindListOptions, useCachedVersionIfAvailable?: boolean, reRequestOnStale?: boolean, ...linksToFollow: FollowLinkConfig<Relationship>[]): Observable<RemoteData<PaginatedList<Relationship>>> {
     return this.searchData.searchBy(searchMethod, options, useCachedVersionIfAvailable, reRequestOnStale, ...linksToFollow);
   }
+
+  /**
+   * Resolve a {@link MetadataValue} into a {@link MetadataRepresentation} of the correct type
+   * @param metadatum   {@link MetadataValue} to resolve
+   * @param parentItem  Parent dspace object the metadata value belongs to
+   * @param itemType    The type of item this metadata value represents (will only be used when no related item can be found, as a fallback)
+   */
+  resolveMetadataRepresentation(metadatum: MetadataValue, parentItem: DSpaceObject, itemType: string): Observable<MetadataRepresentation> {
+    if (metadatum.isVirtual) {
+      return this.findById(metadatum.virtualValue, true, false, followLink('leftItem'), followLink('rightItem')).pipe(
+        getFirstSucceededRemoteData(),
+        switchMap((relRD: RemoteData<Relationship>) =>
+          observableCombineLatest(relRD.payload.leftItem, relRD.payload.rightItem).pipe(
+            filter(([leftItem, rightItem]) => leftItem.hasCompleted && rightItem.hasCompleted),
+            map(([leftItem, rightItem]) => {
+              if (!leftItem.hasSucceeded || !rightItem.hasSucceeded) {
+                return null;
+              } else if (rightItem.hasSucceeded && leftItem.payload.id === parentItem.id) {
+                return rightItem.payload;
+              } else if (rightItem.payload.id === parentItem.id) {
+                return leftItem.payload;
+              }
+            }),
+            map((item: Item) => {
+              if (hasValue(item)) {
+                return Object.assign(new ItemMetadataRepresentation(metadatum), item);
+              } else {
+                return Object.assign(new MetadatumRepresentation(itemType), metadatum);
+              }
+            })
+          )
+        ));
+    } else {
+      return observableOf(Object.assign(new MetadatumRepresentation(itemType), metadatum));
+    }
+  }
 }

src/app/core/data/system-wide-alert-data.service.spec.ts

@@ -0,0 +1,13 @@
+import { SystemWideAlertDataService } from './system-wide-alert-data.service';
+import { testFindAllDataImplementation } from './base/find-all-data.spec';
+import { testPutDataImplementation } from './base/put-data.spec';
+import { testCreateDataImplementation } from './base/create-data.spec';
+
+describe('SystemWideAlertDataService', () => {
+  describe('composition', () => {
+    const initService = () => new SystemWideAlertDataService(null, null, null, null, null);
+    testFindAllDataImplementation(initService);
+    testPutDataImplementation(initService);
+    testCreateDataImplementation(initService);
+  });
+});

src/app/core/data/system-wide-alert-data.service.ts

@@ -0,0 +1,104 @@
+import { Injectable } from '@angular/core';
+import { RequestService } from './request.service';
+import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
+import { ObjectCacheService } from '../cache/object-cache.service';
+import { HALEndpointService } from '../shared/hal-endpoint.service';
+import { Observable } from 'rxjs';
+import { PaginatedList } from './paginated-list.model';
+import { RemoteData } from './remote-data';
+import { IdentifiableDataService } from './base/identifiable-data.service';
+import { FollowLinkConfig } from '../../shared/utils/follow-link-config.model';
+import { FindAllData, FindAllDataImpl } from './base/find-all-data';
+import { FindListOptions } from './find-list-options.model';
+import { dataService } from './base/data-service.decorator';
+import { NotificationsService } from '../../shared/notifications/notifications.service';
+import { CreateData, CreateDataImpl } from './base/create-data';
+import { SYSTEMWIDEALERT } from '../../system-wide-alert/system-wide-alert.resource-type';
+import { SystemWideAlert } from '../../system-wide-alert/system-wide-alert.model';
+import { PutData, PutDataImpl } from './base/put-data';
+import { RequestParam } from '../cache/models/request-param.model';
+import { SearchData, SearchDataImpl } from './base/search-data';
+
+/**
+ * Dataservice representing a system-wide alert
+ */
+@Injectable()
+@dataService(SYSTEMWIDEALERT)
+export class SystemWideAlertDataService extends IdentifiableDataService<SystemWideAlert> implements FindAllData<SystemWideAlert>, CreateData<SystemWideAlert>, PutData<SystemWideAlert>, SearchData<SystemWideAlert> {
+  private findAllData: FindAllDataImpl<SystemWideAlert>;
+  private createData: CreateDataImpl<SystemWideAlert>;
+  private putData: PutDataImpl<SystemWideAlert>;
+  private searchData: SearchData<SystemWideAlert>;
+
+  constructor(
+    protected requestService: RequestService,
+    protected rdbService: RemoteDataBuildService,
+    protected objectCache: ObjectCacheService,
+    protected halService: HALEndpointService,
+    protected notificationsService: NotificationsService,
+  ) {
+    super('systemwidealerts', requestService, rdbService, objectCache, halService);
+
+    this.findAllData = new FindAllDataImpl(this.linkPath, requestService, rdbService, objectCache, halService, this.responseMsToLive);
+    this.createData = new CreateDataImpl(this.linkPath, requestService, rdbService, objectCache, halService, notificationsService, this.responseMsToLive);
+    this.putData = new PutDataImpl(this.linkPath, requestService, rdbService, objectCache, halService, this.responseMsToLive);
+    this.searchData = new SearchDataImpl(this.linkPath, requestService, rdbService, objectCache, halService, this.responseMsToLive);
+  }
+
+  /**
+   * Returns {@link RemoteData} of all object with a list of {@link FollowLinkConfig}, to indicate which embedded
+   * info should be added to the objects
+   *
+   * @param options                     Find list options object
+   * @param useCachedVersionIfAvailable If this is true, the request will only be sent if there's
+   *                                    no valid cached version. Defaults to true
+   * @param reRequestOnStale            Whether or not the request should automatically be re-
+   *                                    requested after the response becomes stale
+   * @param linksToFollow               List of {@link FollowLinkConfig} that indicate which
+   *                                    {@link HALLink}s should be automatically resolved
+   * @return {Observable<RemoteData<PaginatedList<T>>>}
+   *    Return an observable that emits object list
+   */
+  findAll(options?: FindListOptions, useCachedVersionIfAvailable?: boolean, reRequestOnStale?: boolean, ...linksToFollow: FollowLinkConfig<SystemWideAlert>[]): Observable<RemoteData<PaginatedList<SystemWideAlert>>> {
+    return this.findAllData.findAll(options, useCachedVersionIfAvailable, reRequestOnStale, ...linksToFollow);
+  }
+
+  /**
+   * Create a new object on the server, and store the response in the object cache
+   *
+   * @param object    The object to create
+   * @param params    Array with additional params to combine with query string
+   */
+  create(object: SystemWideAlert, ...params: RequestParam[]): Observable<RemoteData<SystemWideAlert>> {
+    return this.createData.create(object, ...params);
+  }
+
+  /**
+   * Send a PUT request for the specified object
+   *
+   * @param object The object to send a put request for.
+   */
+  put(object: SystemWideAlert): Observable<RemoteData<SystemWideAlert>> {
+    return this.putData.put(object);
+  }
+
+  /**
+   * Make a new FindListRequest with given search method
+   *
+   * @param searchMethod                The search method for the object
+   * @param options                     The [[FindListOptions]] object
+   * @param useCachedVersionIfAvailable If this is true, the request will only be sent if there's
+   *                                    no valid cached version. Defaults to true
+   * @param reRequestOnStale            Whether or not the request should automatically be re-
+   *                                    requested after the response becomes stale
+   * @param linksToFollow               List of {@link FollowLinkConfig} that indicate which
+   *                                    {@link HALLink}s should be automatically resolved
+   * @return {Observable<RemoteData<PaginatedList<T>>}
+   *    Return an observable that emits response from the server
+   */
+  searchBy(searchMethod: string, options?: FindListOptions, useCachedVersionIfAvailable?: boolean, reRequestOnStale?: boolean, ...linksToFollow: FollowLinkConfig<SystemWideAlert>[]): Observable<RemoteData<PaginatedList<SystemWideAlert>>> {
+    return this.searchData.searchBy(searchMethod, options, useCachedVersionIfAvailable, reRequestOnStale, ...linksToFollow);
+  }
+
+
+}

src/app/core/metadata/metadata.service.spec.ts

@@ -8,7 +8,12 @@ import { Observable, of as observableOf, of } from 'rxjs';
 import { RemoteData } from '../data/remote-data';
 import { Item } from '../shared/item.model';
 
-import { ItemMock, MockBitstream1, MockBitstream3 } from '../../shared/mocks/item.mock';
+import {
+  ItemMock,
+  MockBitstream1,
+  MockBitstream3,
+  MockBitstream2
+} from '../../shared/mocks/item.mock';
 import { createSuccessfulRemoteDataObject, createSuccessfulRemoteDataObject$ } from '../../shared/remote-data.utils';
 import { PaginatedList } from '../data/paginated-list.model';
 import { Bitstream } from '../shared/bitstream.model';
@@ -24,6 +29,7 @@ import { HardRedirectService } from '../services/hard-redirect.service';
 import { getMockStore } from '@ngrx/store/testing';
 import { AddMetaTagAction, ClearMetaTagAction } from './meta-tag.actions';
 import { AuthorizationDataService } from '../data/feature-authorization/authorization-data.service';
+import { AppConfig } from '../../../config/app-config.interface';
 
 describe('MetadataService', () => {
   let metadataService: MetadataService;
@@ -44,6 +50,8 @@ describe('MetadataService', () => {
   let router: Router;
   let store;
 
+  let appConfig: AppConfig;
+
   const initialState = { 'core': { metaTag: { tagsInUse: ['title', 'description'] }}};
 
 
@@ -86,6 +94,14 @@ describe('MetadataService', () => {
     store = getMockStore({ initialState });
     spyOn(store, 'dispatch');
 
+    appConfig = {
+      item: {
+        bitstream: {
+          pageSize: 5
+        }
+      }
+    } as any;
+
     metadataService = new MetadataService(
       router,
       translateService,
@@ -98,6 +114,7 @@ describe('MetadataService', () => {
       rootService,
       store,
       hardRedirectService,
+      appConfig,
       authorizationService
     );
   });
@@ -358,13 +375,18 @@ describe('MetadataService', () => {
         });
       }));
 
-      it('should link to first Bitstream with allowed format', fakeAsync(() => {
+      describe(`when there's a bitstream with an allowed format on the first page`, () => {
-        const bitstreams = [MockBitstream3, MockBitstream3, MockBitstream1];
+        let bitstreams;
+
+        beforeEach(() => {
+          bitstreams = [MockBitstream2, MockBitstream3, MockBitstream1];
           (bundleDataService.findByItemAndName as jasmine.Spy).and.returnValue(mockBundleRD$(bitstreams));
           (bitstreamDataService.findListByHref as jasmine.Spy).and.returnValues(
             ...mockBitstreamPages$(bitstreams).map(bp => createSuccessfulRemoteDataObject$(bp)),
           );
+        });
 
+        it('should link to first Bitstream with allowed format', fakeAsync(() => {
           (metadataService as any).processRouteChange({
             data: {
               value: {
@@ -375,12 +397,44 @@ describe('MetadataService', () => {
           tick();
           expect(meta.addTag).toHaveBeenCalledWith({
             name: 'citation_pdf_url',
-          content: 'https://request.org/bitstreams/cf9b0c8e-a1eb-4b65-afd0-567366448713/download'
+            content: 'https://request.org/bitstreams/99b00f3c-1cc6-4689-8158-91965bee6b28/download'
           });
         }));
+
+      });
+
     });
   });
 
+  describe(`when there's no bitstream with an allowed format on the first page`, () => {
+    let bitstreams;
+
+    beforeEach(() => {
+      bitstreams = [MockBitstream1, MockBitstream3, MockBitstream2];
+      (bundleDataService.findByItemAndName as jasmine.Spy).and.returnValue(mockBundleRD$(bitstreams));
+      (bitstreamDataService.findListByHref as jasmine.Spy).and.returnValues(
+        ...mockBitstreamPages$(bitstreams).map(bp => createSuccessfulRemoteDataObject$(bp)),
+      );
+    });
+
+    it(`shouldn't add a citation_pdf_url meta tag`, fakeAsync(() => {
+      (metadataService as any).processRouteChange({
+        data: {
+          value: {
+            dso: createSuccessfulRemoteDataObject(ItemMock),
+          }
+        }
+      });
+      tick();
+      expect(meta.addTag).not.toHaveBeenCalledWith({
+        name: 'citation_pdf_url',
+        content: 'https://request.org/bitstreams/99b00f3c-1cc6-4689-8158-91965bee6b28/download'
+      });
+    }));
+
+  });
+
+
   describe('tagstore', () => {
     beforeEach(fakeAsync(() => {
       (metadataService as any).processRouteChange({

src/app/core/metadata/metadata.service.ts

@@ -1,14 +1,21 @@
-import { Injectable } from '@angular/core';
+import { Injectable, Inject } from '@angular/core';
 
 import { Meta, MetaDefinition, Title } from '@angular/platform-browser';
 import { ActivatedRoute, NavigationEnd, Router } from '@angular/router';
 
 import { TranslateService } from '@ngx-translate/core';
 
-import { BehaviorSubject, combineLatest, EMPTY, Observable, of as observableOf } from 'rxjs';
+import {
-import { expand, filter, map, switchMap, take } from 'rxjs/operators';
+  BehaviorSubject,
+  combineLatest,
+  Observable,
+  of as observableOf,
+  concat as observableConcat,
+  EMPTY
+} from 'rxjs';
+import { filter, map, switchMap, take, mergeMap } from 'rxjs/operators';
 
-import { hasNoValue, hasValue } from '../../shared/empty.util';
+import { hasNoValue, hasValue, isNotEmpty } from '../../shared/empty.util';
 import { DSONameService } from '../breadcrumbs/dso-name.service';
 import { BitstreamDataService } from '../data/bitstream-data.service';
 import { BitstreamFormatDataService } from '../data/bitstream-format-data.service';
@@ -37,6 +44,7 @@ import { coreSelector } from '../core.selectors';
 import { CoreState } from '../core-state.model';
 import { AuthorizationDataService } from '../data/feature-authorization/authorization-data.service';
 import { getDownloadableBitstream } from '../shared/bitstream.operators';
+import { APP_CONFIG, AppConfig } from '../../../config/app-config.interface';
 
 /**
  * The base selector function to select the metaTag section in the store
@@ -87,6 +95,7 @@ export class MetadataService {
     private rootService: RootDataService,
     private store: Store<CoreState>,
     private hardRedirectService: HardRedirectService,
+    @Inject(APP_CONFIG) private appConfig: AppConfig,
     private authorizationService: AuthorizationDataService
   ) {
   }
@@ -298,7 +307,13 @@ export class MetadataService {
         true,
         true,
         followLink('primaryBitstream'),
-        followLink('bitstreams', {}, followLink('format')),
+        followLink('bitstreams', {
+            findListOptions: {
+              // limit the number of bitstreams used to find the citation pdf url to the number
+              // shown by default on an item page
+              elementsPerPage: this.appConfig.item.bitstream.pageSize
+            }
+        }, followLink('format')),
       ).pipe(
         getFirstSucceededRemoteDataPayload(),
         switchMap((bundle: Bundle) =>
@@ -363,53 +378,30 @@ export class MetadataService {
   }
 
   /**
-   * For Items with more than one Bitstream (and no primary Bitstream), link to the first Bitstream with a MIME type
+   * For Items with more than one Bitstream (and no primary Bitstream), link to the first Bitstream
+   * with a MIME type.
+   *
+   * Note this will only check the current page (page size determined item.bitstream.pageSize in the
+   * config) of bitstreams for performance reasons.
+   * See https://github.com/DSpace/DSpace/issues/8648 for more info
+   *
    * included in {@linkcode CITATION_PDF_URL_MIMETYPES}
    * @param bitstreamRd
    * @private
    */
   private getFirstAllowedFormatBitstreamLink(bitstreamRd: RemoteData<PaginatedList<Bitstream>>): Observable<string> {
-    return observableOf(bitstreamRd.payload).pipe(
+    if (hasValue(bitstreamRd.payload) && isNotEmpty(bitstreamRd.payload.page)) {
-      // Because there can be more than one page of bitstreams, this expand operator
+      // Retrieve the formats of all bitstreams in the page sequentially
-      // will retrieve them in turn. Due to the take(1) at the bottom, it will only
+      return observableConcat(
-      // retrieve pages until a match is found
+        ...bitstreamRd.payload.page.map((bitstream: Bitstream) => bitstream.format.pipe(
-      expand((paginatedList: PaginatedList<Bitstream>) => {
-        if (hasNoValue(paginatedList.next)) {
-          // If there's no next page, stop.
-          return EMPTY;
-        } else {
-          // Otherwise retrieve the next page
-          return this.bitstreamDataService.findListByHref(
-            paginatedList.next,
-            undefined,
-            true,
-            true,
-            followLink('format')
-          ).pipe(
-            getFirstCompletedRemoteData(),
-            map((next: RemoteData<PaginatedList<Bitstream>>) => {
-              if (hasValue(next.payload)) {
-                return next.payload;
-              } else {
-                return EMPTY;
-              }
-            })
-          );
-        }
-      }),
-      // Return the array of bitstreams inside each paginated list
-      map((paginatedList: PaginatedList<Bitstream>) => paginatedList.page),
-      // Emit the bitstreams in the list one at a time
-      switchMap((bitstreams: Bitstream[]) => bitstreams),
-      // Retrieve the format for each bitstream
-      switchMap((bitstream: Bitstream) => bitstream.format.pipe(
           getFirstSucceededRemoteDataPayload(),
           // Keep the original bitstream, because it, not the format, is what we'll need
           // for the link at the end
           map((format: BitstreamFormat) => [bitstream, format])
-      )),
+        ))
-      // Check if bitstream downloadable
+      ).pipe(
-      switchMap(([bitstream, format]: [Bitstream, BitstreamFormat]) => observableOf(bitstream).pipe(
+        // Verify that the bitstream is downloadable
+        mergeMap(([bitstream, format]: [Bitstream, BitstreamFormat]) => observableOf(bitstream).pipe(
           getDownloadableBitstream(this.authorizationService),
           map((bit: Bitstream) => [bit, format])
         )),
@@ -419,8 +411,12 @@ export class MetadataService {
         // We only need 1
         take(1),
         // Emit the link of the match
+        // tap((v) => console.log('result', v)),
         map(([bitstream, ]: [Bitstream, BitstreamFormat]) => getBitstreamDownloadRoute(bitstream))
       );
+    } else {
+      return EMPTY;
+    }
   }
 
   /**

src/app/core/profile/researcher-profile-data.service.ts

@@ -3,8 +3,8 @@ import { Injectable } from '@angular/core';
 import { Router } from '@angular/router';
 
 import { Operation, ReplaceOperation } from 'fast-json-patch';
-import { Observable } from 'rxjs';
+import { Observable, of as observableOf } from 'rxjs';
-import { find, map } from 'rxjs/operators';
+import { find, map, mergeMap } from 'rxjs/operators';
 import { NotificationsService } from '../../shared/notifications/notifications.service';
 import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
 import { ObjectCacheService } from '../cache/object-cache.service';
@@ -130,6 +130,24 @@ export class ResearcherProfileDataService extends IdentifiableDataService<Resear
     return this.rdbService.buildFromRequestUUID(requestId, followLink('item'));
   }
 
+  /**
+   * Creates a researcher profile starting from an external source URI and returns the related item's ID
+   * Emits null if the researcher profile doesn't exist after sending out the request
+   * @param sourceUri
+   */
+  createFromExternalSourceAndReturnRelatedItemId(sourceUri: string): Observable<string> {
+    return this.createFromExternalSource(sourceUri).pipe(
+      getFirstCompletedRemoteData(),
+      mergeMap((rd: RemoteData<ResearcherProfile>) => {
+        if (rd.hasSucceeded) {
+          return this.findRelatedItemId(rd.payload);
+        } else {
+          return observableOf(null);
+        }
+      }),
+    );
+  }
+
 
   /**
    * Create a new object on the server, and store the response in the object cache

src/app/core/services/server-xhr.service.ts

@@ -0,0 +1,16 @@
+import { XhrFactory } from '@angular/common';
+import { Injectable } from '@angular/core';
+import { prototype, XMLHttpRequest } from 'xhr2';
+
+/**
+ * Overrides the default XhrFactory server side, to allow us to set cookies in requests to the
+ * backend. This was added to be able to perform a working XSRF request from the node server, as it
+ * needs to set a cookie for the XSRF token
+ */
+@Injectable()
+export class ServerXhrService implements XhrFactory {
+  build(): XMLHttpRequest {
+    prototype._restrictedHeaders.cookie = false;
+    return new XMLHttpRequest();
+  }
+}

src/app/core/shared/item.model.ts

@@ -24,6 +24,8 @@ import { Bitstream } from './bitstream.model';
 import { ACCESS_STATUS } from 'src/app/shared/object-list/access-status-badge/access-status.resource-type';
 import { AccessStatusObject } from 'src/app/shared/object-list/access-status-badge/access-status.model';
 import { HandleObject } from './handle-object.model';
+import { IDENTIFIERS } from '../../shared/object-list/identifier-data/identifier-data.resource-type';
+import { IdentifierData } from '../../shared/object-list/identifier-data/identifier-data.model';
 
 /**
  * Class representing a DSpace Item
@@ -76,6 +78,7 @@ export class Item extends DSpaceObject implements ChildHALResource, HandleObject
     version: HALLink;
     thumbnail: HALLink;
     accessStatus: HALLink;
+    identifiers: HALLink;
     self: HALLink;
   };
 
@@ -121,6 +124,13 @@ export class Item extends DSpaceObject implements ChildHALResource, HandleObject
    @link(ACCESS_STATUS)
    accessStatus?: Observable<RemoteData<AccessStatusObject>>;
 
+  /**
+   * The identifier data for this Item
+   * Will be undefined unless the identifiers {@link HALLink} has been resolved.
+   */
+  @link(IDENTIFIERS, false, 'identifiers')
+  identifiers?: Observable<RemoteData<IdentifierData>>;
+
   /**
    * Method that returns as which type of object this object should be rendered
    */

src/app/core/shared/metadata-representation/metadata-representation.model.ts

@@ -1,11 +1,14 @@
 /**
  * An Enum defining the representation type of metadata
  */
+import { BrowseDefinition } from '../browse-definition.model';
+
 export enum MetadataRepresentationType {
   None = 'none',
   Item = 'item',
   AuthorityControlled = 'authority_controlled',
-  PlainText = 'plain_text'
+  PlainText = 'plain_text',
+  BrowseLink = 'browse_link'
 }
 
 /**
@@ -24,8 +27,14 @@ export interface MetadataRepresentation {
    */
   representationType: MetadataRepresentationType;
 
+  /**
+   * The browse definition (optional)
+   */
+  browseDefinition?: BrowseDefinition;
+
   /**
    * Fetches the value to be displayed
    */
   getValue(): string;
+
 }

src/app/core/shared/metadata-representation/metadatum/metadatum-representation.model.ts

@@ -1,6 +1,7 @@
 import { MetadataRepresentation, MetadataRepresentationType } from '../metadata-representation.model';
 import { hasValue } from '../../../../shared/empty.util';
 import { MetadataValue } from '../../metadata.models';
+import { BrowseDefinition } from '../../browse-definition.model';
 
 /**
  * This class defines the way the metadatum it extends should be represented
@@ -12,9 +13,15 @@ export class MetadatumRepresentation extends MetadataValue implements MetadataRe
    */
   itemType: string;
 
-  constructor(itemType: string) {
+  /**
+   * The browse definition ID passed in with the metadatum, if any
+   */
+  browseDefinition?: BrowseDefinition;
+
+  constructor(itemType: string, browseDefinition?: BrowseDefinition) {
     super();
     this.itemType = itemType;
+    this.browseDefinition = browseDefinition;
   }
 
   /**
@@ -23,6 +30,8 @@ export class MetadatumRepresentation extends MetadataValue implements MetadataRe
   get representationType(): MetadataRepresentationType {
     if (hasValue(this.authority)) {
       return MetadataRepresentationType.AuthorityControlled;
+    } else if (hasValue(this.browseDefinition)) {
+      return MetadataRepresentationType.BrowseLink;
     } else {
       return MetadataRepresentationType.PlainText;
     }

src/app/core/shared/operators.ts

@@ -226,7 +226,7 @@ export const metadataFieldsToString = () =>
             map((schema: MetadataSchema) => ({ field, schema }))
           );
         });
-        return observableCombineLatest(fieldSchemaArray);
+        return isNotEmpty(fieldSchemaArray) ? observableCombineLatest(fieldSchemaArray) : [[]];
       }),
       map((fieldSchemaArray: { field: MetadataField, schema: MetadataSchema }[]): string[] => {
         return fieldSchemaArray.map((fieldSchema: { field: MetadataField, schema: MetadataSchema }) => fieldSchema.schema.prefix + '.' + fieldSchema.field.toString());

src/app/core/submission/models/workspaceitem-section-identifiers.model.ts

@@ -0,0 +1,9 @@
+/*
+ * Object model for the data returned by the REST API to present minted identifiers in a submission section
+ */
+import { Identifier } from '../../../shared/object-list/identifier-data/identifier.model';
+
+export interface WorkspaceitemSectionIdentifiersObject {
+  identifiers?: Identifier[]
+  displayTypes?: string[]
+}

src/app/core/submission/models/workspaceitem-sections.model.ts

@@ -3,6 +3,7 @@ import { WorkspaceitemSectionFormObject } from './workspaceitem-section-form.mod
 import { WorkspaceitemSectionLicenseObject } from './workspaceitem-section-license.model';
 import { WorkspaceitemSectionUploadObject } from './workspaceitem-section-upload.model';
 import { WorkspaceitemSectionCcLicenseObject } from './workspaceitem-section-cc-license.model';
+import {WorkspaceitemSectionIdentifiersObject} from './workspaceitem-section-identifiers.model';
 import { WorkspaceitemSectionSherpaPoliciesObject } from './workspaceitem-section-sherpa-policies.model';
 
 /**
@@ -23,4 +24,5 @@ export type WorkspaceitemSectionDataType
   | WorkspaceitemSectionCcLicenseObject
   | WorkspaceitemSectionAccessesObject
   | WorkspaceitemSectionSherpaPoliciesObject
+  | WorkspaceitemSectionIdentifiersObject
   | string;

src/app/core/xsrf/xsrf.interceptor.ts

@@ -19,6 +19,8 @@ export const XSRF_REQUEST_HEADER = 'X-XSRF-TOKEN';
 export const XSRF_RESPONSE_HEADER = 'DSPACE-XSRF-TOKEN';
 // Name of cookie where we store the XSRF token
 export const XSRF_COOKIE = 'XSRF-TOKEN';
+// Name of cookie the backend expects the XSRF token to be in
+export const DSPACE_XSRF_COOKIE = 'DSPACE-XSRF-COOKIE';
 
 /**
  * Custom Http Interceptor intercepting Http Requests & Responses to

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-field-values/dso-edit-metadata-field-values.component.html

@@ -0,0 +1,15 @@
+<div class="flex-grow-1 ds-drop-list h-100" [class.disabled]="(draggingMdField$ | async) && (draggingMdField$ | async) !== mdField" cdkDropList (cdkDropListDropped)="drop($event)" role="table">
+  <ds-dso-edit-metadata-value-headers role="presentation" [dsoType]="dsoType"></ds-dso-edit-metadata-value-headers>
+  <ds-dso-edit-metadata-value *ngFor="let mdValue of form.fields[mdField]; let idx = index" role="presentation"
+                              [dso]="dso"
+                              [mdValue]="mdValue"
+                              [dsoType]="dsoType"
+                              [saving$]="saving$"
+                              [isOnlyValue]="form.fields[mdField].length === 1"
+                              (edit)="mdValue.editing = true"
+                              (confirm)="mdValue.confirmChanges($event); form.resetReinstatable(); valueSaved.emit()"
+                              (remove)="mdValue.change === DsoEditMetadataChangeTypeEnum.ADD ? form.remove(mdField, idx) : mdValue.change = DsoEditMetadataChangeTypeEnum.REMOVE; form.resetReinstatable(); valueSaved.emit()"
+                              (undo)="mdValue.change === DsoEditMetadataChangeTypeEnum.ADD ? form.remove(mdField, idx) : mdValue.discard(); valueSaved.emit()"
+                              (dragging)="$event ? draggingMdField$.next(mdField) : draggingMdField$.next(null)">
+  </ds-dso-edit-metadata-value>
+</div>

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-field-values/dso-edit-metadata-field-values.component.scss

@@ -0,0 +1,7 @@
+.ds-drop-list {
+  background-color: var(--bs-gray-500);
+
+  &.disabled {
+    opacity: 0.3;
+  }
+}

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-field-values/dso-edit-metadata-field-values.component.spec.ts

@@ -0,0 +1,135 @@
+import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
+import { VarDirective } from '../../../shared/utils/var.directive';
+import { TranslateModule } from '@ngx-translate/core';
+import { RouterTestingModule } from '@angular/router/testing';
+import { NO_ERRORS_SCHEMA } from '@angular/core';
+import { DsoEditMetadataFieldValuesComponent } from './dso-edit-metadata-field-values.component';
+import { DsoEditMetadataForm } from '../dso-edit-metadata-form';
+import { DSpaceObject } from '../../../core/shared/dspace-object.model';
+import { MetadataValue } from '../../../core/shared/metadata.models';
+import { of } from 'rxjs/internal/observable/of';
+import { BehaviorSubject } from 'rxjs/internal/BehaviorSubject';
+import { By } from '@angular/platform-browser';
+
+describe('DsoEditMetadataFieldValuesComponent', () => {
+  let component: DsoEditMetadataFieldValuesComponent;
+  let fixture: ComponentFixture<DsoEditMetadataFieldValuesComponent>;
+
+  let form: DsoEditMetadataForm;
+  let dso: DSpaceObject;
+  let mdField: string;
+  let draggingMdField$: BehaviorSubject<string>;
+
+  beforeEach(waitForAsync(() => {
+    dso = Object.assign(new DSpaceObject(), {
+      metadata: {
+        'dc.title': [
+          Object.assign(new MetadataValue(), {
+            value: 'Test Title',
+            language: 'en',
+            place: 0,
+          }),
+        ],
+        'dc.subject': [
+          Object.assign(new MetadataValue(), {
+            value: 'Subject One',
+            language: 'en',
+            place: 0,
+          }),
+          Object.assign(new MetadataValue(), {
+            value: 'Subject Two',
+            language: 'en',
+            place: 1,
+          }),
+          Object.assign(new MetadataValue(), {
+            value: 'Subject Three',
+            language: 'en',
+            place: 2,
+          }),
+        ],
+      },
+    });
+    form = new DsoEditMetadataForm(dso.metadata);
+    mdField = 'dc.subject';
+    draggingMdField$ = new BehaviorSubject<string>(null);
+
+    TestBed.configureTestingModule({
+      declarations: [DsoEditMetadataFieldValuesComponent, VarDirective],
+      imports: [TranslateModule.forRoot(), RouterTestingModule.withRoutes([])],
+      providers: [
+      ],
+      schemas: [NO_ERRORS_SCHEMA]
+    }).compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(DsoEditMetadataFieldValuesComponent);
+    component = fixture.componentInstance;
+    component.dso = dso;
+    component.form = form;
+    component.mdField = mdField;
+    component.saving$ = of(false);
+    component.draggingMdField$ = draggingMdField$;
+    fixture.detectChanges();
+  });
+
+  describe('when draggingMdField$ emits a value equal to mdField', () => {
+    beforeEach(() => {
+      draggingMdField$.next(mdField);
+      fixture.detectChanges();
+    });
+
+    it('should not disable the list', () => {
+      expect(fixture.debugElement.query(By.css('.ds-drop-list.disabled'))).toBeNull();
+    });
+  });
+
+  describe('when draggingMdField$ emits a value different to mdField', () => {
+    beforeEach(() => {
+      draggingMdField$.next(`${mdField}.fake`);
+      fixture.detectChanges();
+    });
+
+    it('should disable the list', () => {
+      expect(fixture.debugElement.query(By.css('.ds-drop-list.disabled'))).toBeTruthy();
+    });
+  });
+
+  describe('when draggingMdField$ emits null', () => {
+    beforeEach(() => {
+      draggingMdField$.next(null);
+      fixture.detectChanges();
+    });
+
+    it('should not disable the list', () => {
+      expect(fixture.debugElement.query(By.css('.ds-drop-list.disabled'))).toBeNull();
+    });
+  });
+
+  describe('dropping a value on a different index', () => {
+    beforeEach(() => {
+      component.drop(Object.assign({
+        previousIndex: 0,
+        currentIndex: 2,
+      }));
+    });
+
+    it('should physically move the relevant metadata value within the form', () => {
+      expect(form.fields[mdField][0].newValue.value).toEqual('Subject Two');
+      expect(form.fields[mdField][1].newValue.value).toEqual('Subject Three');
+      expect(form.fields[mdField][2].newValue.value).toEqual('Subject One');
+    });
+
+    it('should update the metadata values their new place to match the new physical order', () => {
+      expect(form.fields[mdField][0].newValue.place).toEqual(0);
+      expect(form.fields[mdField][1].newValue.place).toEqual(1);
+      expect(form.fields[mdField][2].newValue.place).toEqual(2);
+    });
+
+    it('should maintain the metadata values their original place in their original value so it can be used later to determine the patch operations', () => {
+      expect(form.fields[mdField][0].originalValue.place).toEqual(1);
+      expect(form.fields[mdField][1].originalValue.place).toEqual(2);
+      expect(form.fields[mdField][2].originalValue.place).toEqual(0);
+    });
+  });
+});

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-field-values/dso-edit-metadata-field-values.component.ts

@@ -0,0 +1,81 @@
+import { Component, EventEmitter, Input, Output } from '@angular/core';
+import { DsoEditMetadataChangeType, DsoEditMetadataForm, DsoEditMetadataValue } from '../dso-edit-metadata-form';
+import { Observable } from 'rxjs/internal/Observable';
+import { DSpaceObject } from '../../../core/shared/dspace-object.model';
+import { BehaviorSubject } from 'rxjs/internal/BehaviorSubject';
+import { CdkDragDrop, moveItemInArray } from '@angular/cdk/drag-drop';
+
+@Component({
+  selector: 'ds-dso-edit-metadata-field-values',
+  styleUrls: ['./dso-edit-metadata-field-values.component.scss'],
+  templateUrl: './dso-edit-metadata-field-values.component.html',
+})
+/**
+ * Component displaying table rows for each value for a certain metadata field within a form
+ */
+export class DsoEditMetadataFieldValuesComponent {
+  /**
+   * The parent {@link DSpaceObject} to display a metadata form for
+   * Also used to determine metadata-representations in case of virtual metadata
+   */
+  @Input() dso: DSpaceObject;
+  /**
+   * A dynamic form object containing all information about the metadata and the changes made to them, see {@link DsoEditMetadataForm}
+   */
+  @Input() form: DsoEditMetadataForm;
+
+  /**
+   * Metadata field to display values for
+   */
+  @Input() mdField: string;
+
+  /**
+   * Type of DSO we're displaying values for
+   * Determines i18n messages
+   */
+  @Input() dsoType: string;
+
+  /**
+   * Observable to check if the form is being saved or not
+   */
+  @Input() saving$: Observable<boolean>;
+
+  /**
+   * Tracks for which metadata-field a drag operation is taking place
+   * Null when no drag is currently happening for any field
+   */
+  @Input() draggingMdField$: BehaviorSubject<string>;
+
+  /**
+   * Emit when the value has been saved within the form
+   */
+  @Output() valueSaved: EventEmitter<any> = new EventEmitter<any>();
+
+  /**
+   * The DsoEditMetadataChangeType enumeration for access in the component's template
+   * @type {DsoEditMetadataChangeType}
+   */
+  public DsoEditMetadataChangeTypeEnum = DsoEditMetadataChangeType;
+
+  /**
+   * Drop a value into a new position
+   * Update the form's value array for the current field to match the dropped position
+   * Update the values their place property to match the new order
+   * Send an update to the parent
+   * @param event
+   */
+  drop(event: CdkDragDrop<any>) {
+    const dragIndex = event.previousIndex;
+    const dropIndex = event.currentIndex;
+    // Move the value within its field
+    moveItemInArray(this.form.fields[this.mdField], dragIndex, dropIndex);
+    // Update all the values in this field their place property
+    this.form.fields[this.mdField].forEach((value: DsoEditMetadataValue, index: number) => {
+      value.newValue.place = index;
+      value.confirmChanges();
+    });
+    // Update the form statuses
+    this.form.resetReinstatable();
+    this.valueSaved.emit();
+  }
+}

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-form.spec.ts

@@ -0,0 +1,275 @@
+import { DsoEditMetadataChangeType, DsoEditMetadataForm } from './dso-edit-metadata-form';
+import { DSpaceObject } from '../../core/shared/dspace-object.model';
+import { MetadataValue } from '../../core/shared/metadata.models';
+
+describe('DsoEditMetadataForm', () => {
+  let form: DsoEditMetadataForm;
+  let dso: DSpaceObject;
+
+  beforeEach(() => {
+    dso = Object.assign(new DSpaceObject(), {
+      metadata: {
+        'dc.title': [
+          Object.assign(new MetadataValue(), {
+            value: 'Test Title',
+            language: 'en',
+            place: 0,
+          }),
+        ],
+        'dc.subject': [
+          Object.assign(new MetadataValue(), {
+            value: 'Subject One',
+            language: 'en',
+            place: 0,
+          }),
+          Object.assign(new MetadataValue(), {
+            value: 'Subject Two',
+            language: 'en',
+            place: 1,
+          }),
+          Object.assign(new MetadataValue(), {
+            value: 'Subject Three',
+            language: 'en',
+            place: 2,
+          }),
+        ],
+      },
+    });
+    form = new DsoEditMetadataForm(dso.metadata);
+  });
+
+
+  describe('adding a new value', () => {
+    beforeEach(() => {
+      form.add();
+    });
+
+    it('should add an empty value to \"newValue\" with no place yet and editing set to true', () => {
+      expect(form.newValue).toBeDefined();
+      expect(form.newValue.originalValue.place).toBeUndefined();
+      expect(form.newValue.newValue.place).toBeUndefined();
+      expect(form.newValue.editing).toBeTrue();
+    });
+
+    it('should not mark the form as changed yet', () => {
+      expect(form.hasChanges()).toEqual(false);
+    });
+
+    describe('and assigning a value and metadata field to it', () => {
+      let mdField: string;
+      let value: string;
+      let expectedPlace: number;
+
+      beforeEach(() => {
+        mdField = 'dc.subject';
+        value = 'Subject Four';
+        form.newValue.newValue.value = value;
+        form.setMetadataField(mdField);
+        expectedPlace = form.fields[mdField].length - 1;
+      });
+
+      it('should add the new value to the values of the relevant field', () => {
+        expect(form.fields[mdField][expectedPlace].newValue.value).toEqual(value);
+      });
+
+      it('should set its editing flag to false', () => {
+        expect(form.fields[mdField][expectedPlace].editing).toBeFalse();
+      });
+
+      it('should set both its original and new place to match its position in the value array', () => {
+        expect(form.fields[mdField][expectedPlace].newValue.place).toEqual(expectedPlace);
+        expect(form.fields[mdField][expectedPlace].originalValue.place).toEqual(expectedPlace);
+      });
+
+      it('should clear \"newValue\"', () => {
+        expect(form.newValue).toBeUndefined();
+      });
+
+      it('should mark the form as changed', () => {
+        expect(form.hasChanges()).toEqual(true);
+      });
+
+      describe('discard', () => {
+        beforeEach(() => {
+          form.discard();
+        });
+
+        it('should remove the new value', () => {
+          expect(form.fields[mdField][expectedPlace]).toBeUndefined();
+        });
+
+        it('should mark the form as unchanged again', () => {
+          expect(form.hasChanges()).toEqual(false);
+        });
+
+        describe('reinstate', () => {
+          beforeEach(() => {
+            form.reinstate();
+          });
+
+          it('should re-add the new value', () => {
+            expect(form.fields[mdField][expectedPlace].newValue.value).toEqual(value);
+          });
+
+          it('should mark the form as changed once again', () => {
+            expect(form.hasChanges()).toEqual(true);
+          });
+        });
+      });
+    });
+  });
+
+  describe('removing a value entirely (not just marking deleted)', () => {
+    it('should remove the value on the correct index', () => {
+      form.remove('dc.subject', 1);
+      expect(form.fields['dc.subject'].length).toEqual(2);
+      expect(form.fields['dc.subject'][0].newValue.value).toEqual('Subject One');
+      expect(form.fields['dc.subject'][1].newValue.value).toEqual('Subject Three');
+    });
+  });
+
+  describe('moving a value', () => {
+    beforeEach(() => {
+      form.fields['dc.subject'][0].newValue.place = form.fields['dc.subject'][1].originalValue.place;
+      form.fields['dc.subject'][1].newValue.place = form.fields['dc.subject'][0].originalValue.place;
+      form.fields['dc.subject'][0].confirmChanges();
+      form.fields['dc.subject'][1].confirmChanges();
+    });
+
+    it('should mark the value as changed', () => {
+      expect(form.fields['dc.subject'][0].hasChanges()).toEqual(true);
+      expect(form.fields['dc.subject'][1].hasChanges()).toEqual(true);
+    });
+
+    it('should mark the form as changed', () => {
+      expect(form.hasChanges()).toEqual(true);
+    });
+
+    describe('discard', () => {
+      beforeEach(() => {
+        form.discard();
+      });
+
+      it('should reset the moved values their places to their original values', () => {
+        expect(form.fields['dc.subject'][0].newValue.place).toEqual(form.fields['dc.subject'][0].originalValue.place);
+        expect(form.fields['dc.subject'][1].newValue.place).toEqual(form.fields['dc.subject'][1].originalValue.place);
+      });
+
+      it('should mark the form as unchanged again', () => {
+        expect(form.hasChanges()).toEqual(false);
+      });
+
+      describe('reinstate', () => {
+        beforeEach(() => {
+          form.reinstate();
+        });
+
+        it('should move the values to their new places again', () => {
+          expect(form.fields['dc.subject'][0].newValue.place).toEqual(form.fields['dc.subject'][1].originalValue.place);
+          expect(form.fields['dc.subject'][1].newValue.place).toEqual(form.fields['dc.subject'][0].originalValue.place);
+        });
+
+        it('should mark the form as changed once again', () => {
+          expect(form.hasChanges()).toEqual(true);
+        });
+      });
+    });
+  });
+
+  describe('marking a value deleted', () => {
+    beforeEach(() => {
+      form.fields['dc.title'][0].change = DsoEditMetadataChangeType.REMOVE;
+    });
+
+    it('should mark the value as changed', () => {
+      expect(form.fields['dc.title'][0].hasChanges()).toEqual(true);
+    });
+
+    it('should mark the form as changed', () => {
+      expect(form.hasChanges()).toEqual(true);
+    });
+
+    describe('discard', () => {
+      beforeEach(() => {
+        form.discard();
+      });
+
+      it('should remove the deleted mark from the value', () => {
+        expect(form.fields['dc.title'][0].change).toBeUndefined();
+      });
+
+      it('should mark the form as unchanged again', () => {
+        expect(form.hasChanges()).toEqual(false);
+      });
+
+      describe('reinstate', () => {
+        beforeEach(() => {
+          form.reinstate();
+        });
+
+        it('should re-mark the value as deleted', () => {
+          expect(form.fields['dc.title'][0].change).toEqual(DsoEditMetadataChangeType.REMOVE);
+        });
+
+        it('should mark the form as changed once again', () => {
+          expect(form.hasChanges()).toEqual(true);
+        });
+      });
+    });
+  });
+
+  describe('editing a value', () => {
+    const value = 'New title';
+
+    beforeEach(() => {
+      form.fields['dc.title'][0].editing = true;
+      form.fields['dc.title'][0].newValue.value = value;
+    });
+
+    it('should not mark the form as changed yet', () => {
+      expect(form.hasChanges()).toEqual(false);
+    });
+
+    describe('and confirming the changes', () => {
+      beforeEach(() => {
+        form.fields['dc.title'][0].confirmChanges(true);
+      });
+
+      it('should mark the value as changed', () => {
+        expect(form.fields['dc.title'][0].hasChanges()).toEqual(true);
+      });
+
+      it('should mark the form as changed', () => {
+        expect(form.hasChanges()).toEqual(true);
+      });
+
+      describe('discard', () => {
+        beforeEach(() => {
+          form.discard();
+        });
+
+        it('should reset the changed value to its original value', () => {
+          expect(form.fields['dc.title'][0].newValue.value).toEqual(form.fields['dc.title'][0].originalValue.value);
+        });
+
+        it('should mark the form as unchanged again', () => {
+          expect(form.hasChanges()).toEqual(false);
+        });
+
+        describe('reinstate', () => {
+          beforeEach(() => {
+            form.reinstate();
+          });
+
+          it('should put the changed value back in place', () => {
+            expect(form.fields['dc.title'][0].newValue.value).toEqual(value);
+          });
+
+          it('should mark the form as changed once again', () => {
+            expect(form.hasChanges()).toEqual(true);
+          });
+        });
+      });
+    });
+  });
+});

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-form.ts

@@ -0,0 +1,453 @@
+/* eslint-disable max-classes-per-file */
+import { MetadataMap, MetadataValue } from '../../core/shared/metadata.models';
+import { hasNoValue, hasValue, isEmpty, isNotEmpty } from '../../shared/empty.util';
+import { MoveOperation, Operation } from 'fast-json-patch';
+import { MetadataPatchReplaceOperation } from '../../core/data/object-updates/patch-operation-service/operations/metadata/metadata-patch-replace-operation.model';
+import { MetadataPatchRemoveOperation } from '../../core/data/object-updates/patch-operation-service/operations/metadata/metadata-patch-remove-operation.model';
+import { MetadataPatchAddOperation } from '../../core/data/object-updates/patch-operation-service/operations/metadata/metadata-patch-add-operation.model';
+import { ArrayMoveChangeAnalyzer } from '../../core/data/array-move-change-analyzer.service';
+import { MetadataPatchMoveOperation } from '../../core/data/object-updates/patch-operation-service/operations/metadata/metadata-patch-move-operation.model';
+
+/**
+ * Enumeration for the type of change occurring on a metadata value
+ */
+export enum DsoEditMetadataChangeType {
+  UPDATE = 1,
+  ADD = 2,
+  REMOVE = 3
+}
+
+/**
+ * Class holding information about a metadata value and its changes within an edit form
+ */
+export class DsoEditMetadataValue {
+  /**
+   * The original metadata value (should stay the same!) used to compare changes with
+   */
+  originalValue: MetadataValue;
+
+  /**
+   * The new value, dynamically changing
+   */
+  newValue: MetadataValue;
+
+  /**
+   * A value that can be used to undo any discarding that took place
+   */
+  reinstatableValue: MetadataValue;
+
+  /**
+   * Whether or not this value is currently being edited or not
+   */
+  editing = false;
+
+  /**
+   * The type of change that's taking place on this metadata value
+   * Empty if no changes are made
+   */
+  change: DsoEditMetadataChangeType;
+
+  /**
+   * A flag to keep track if the value has been reordered (place has changed)
+   */
+  reordered = false;
+
+  /**
+   * A type or change that can be used to undo any discarding that took place
+   */
+  reinstatableChange: DsoEditMetadataChangeType;
+
+  constructor(value: MetadataValue, added = false) {
+    this.originalValue = value;
+    this.newValue = Object.assign(new MetadataValue(), value);
+    if (added) {
+      this.change = DsoEditMetadataChangeType.ADD;
+      this.editing = true;
+    }
+  }
+
+  /**
+   * Save the current changes made to the metadata value
+   * This will set the type of change to UPDATE if the new metadata value's value and/or language are different from
+   * the original value
+   * It will also set the editing flag to false
+   */
+  confirmChanges(finishEditing = false) {
+    this.reordered = this.originalValue.place !== this.newValue.place;
+    if (hasNoValue(this.change) || this.change === DsoEditMetadataChangeType.UPDATE) {
+      if ((this.originalValue.value !== this.newValue.value || this.originalValue.language !== this.newValue.language)) {
+        this.change = DsoEditMetadataChangeType.UPDATE;
+      } else {
+        this.change = undefined;
+      }
+    }
+    if (finishEditing) {
+      this.editing = false;
+    }
+  }
+
+  /**
+   * Returns if the current value contains changes or not
+   * If the metadata value contains changes, but they haven't been confirmed yet through confirmChanges(), this might
+   * return false (which is desired)
+   */
+  hasChanges(): boolean {
+    return hasValue(this.change) || this.reordered;
+  }
+
+  /**
+   * Discard the current changes and mark the value and change type re-instatable by storing them in their relevant
+   * properties
+   */
+  discardAndMarkReinstatable(): void {
+    if (this.change === DsoEditMetadataChangeType.UPDATE || this.reordered) {
+      this.reinstatableValue = this.newValue;
+    }
+    this.reinstatableChange = this.change;
+    this.discard(false);
+  }
+
+  /**
+   * Discard the current changes
+   * Call discardAndMarkReinstatable() instead, if the discard should be re-instatable
+   */
+  discard(keepPlace = true): void {
+    this.change = undefined;
+    const place = this.newValue.place;
+    this.newValue = Object.assign(new MetadataValue(), this.originalValue);
+    if (keepPlace) {
+      this.newValue.place = place;
+    }
+    this.confirmChanges(true);
+  }
+
+  /**
+   * Re-instate (undo) the last discard by replacing the value and change type with their reinstate properties (if present)
+   */
+  reinstate(): void {
+    if (hasValue(this.reinstatableValue)) {
+      this.newValue = this.reinstatableValue;
+      this.reinstatableValue = undefined;
+    }
+    if (hasValue(this.reinstatableChange)) {
+      this.change = this.reinstatableChange;
+      this.reinstatableChange = undefined;
+    }
+    this.confirmChanges();
+  }
+
+  /**
+   * Returns if either the value or change type have a re-instatable property
+   * This will be the case if a discard has taken place that undid changes to the value or type
+   */
+  isReinstatable(): boolean {
+    return hasValue(this.reinstatableValue) || hasValue(this.reinstatableChange);
+  }
+
+  /**
+   * Reset the state of the re-instatable properties
+   */
+  resetReinstatable() {
+    this.reinstatableValue = undefined;
+    this.reinstatableChange = undefined;
+  }
+}
+
+/**
+ * Class holding information about the metadata of a DSpaceObject and its changes within an edit form
+ */
+export class DsoEditMetadataForm {
+  /**
+   * List of original metadata field keys (before any changes took place)
+   */
+  originalFieldKeys: string[];
+
+  /**
+   * List of current metadata field keys (includes new fields for values added by the user)
+   */
+  fieldKeys: string[];
+
+  /**
+   * Current state of the form
+   * Key: Metadata field
+   * Value: List of {@link DsoEditMetadataValue}s for the metadata field
+   */
+  fields: {
+    [mdField: string]: DsoEditMetadataValue[],
+  };
+
+  /**
+   * A map of previously added metadata values before a discard of the form took place
+   * This can be used to re-instate the entire form to before the discard taking place
+   */
+  reinstatableNewValues: {
+    [mdField: string]: DsoEditMetadataValue[],
+  };
+
+  /**
+   * A (temporary) new metadata value added by the user, not belonging to a metadata field yet
+   * This value will be finalised and added to a field using setMetadataField()
+   */
+  newValue: DsoEditMetadataValue;
+
+  constructor(metadata: MetadataMap) {
+    this.originalFieldKeys = [];
+    this.fieldKeys = [];
+    this.fields = {};
+    this.reinstatableNewValues = {};
+    Object.entries(metadata).forEach(([mdField, values]: [string, MetadataValue[]]) => {
+      this.originalFieldKeys.push(mdField);
+      this.fieldKeys.push(mdField);
+      this.setValuesForFieldSorted(mdField, values.map((value: MetadataValue) => new DsoEditMetadataValue(value)));
+    });
+    this.sortFieldKeys();
+  }
+
+  /**
+   * Add a new temporary value for the user to edit
+   */
+  add(): void {
+    if (hasNoValue(this.newValue)) {
+      this.newValue = new DsoEditMetadataValue(new MetadataValue(), true);
+    }
+  }
+
+  /**
+   * Add the temporary value to a metadata field
+   * Clear the temporary value afterwards
+   * @param mdField
+   */
+  setMetadataField(mdField: string): void {
+    this.newValue.editing = false;
+    this.addValueToField(this.newValue, mdField);
+    // Set the place property to match the new value's position within its field
+    const place = this.fields[mdField].length - 1;
+    this.fields[mdField][place].originalValue.place = place;
+    this.fields[mdField][place].newValue.place = place;
+    this.newValue = undefined;
+  }
+
+  /**
+   * Add a value to a metadata field within the map
+   * @param value
+   * @param mdField
+   * @private
+   */
+  private addValueToField(value: DsoEditMetadataValue, mdField: string): void {
+    if (isEmpty(this.fields[mdField])) {
+      this.fieldKeys.push(mdField);
+      this.sortFieldKeys();
+      this.fields[mdField] = [];
+    }
+    this.fields[mdField].push(value);
+  }
+
+  /**
+   * Remove a value from a metadata field on a given index (this actually removes the value, not just marking it deleted)
+   * @param mdField
+   * @param index
+   */
+  remove(mdField: string, index: number): void {
+    if (isNotEmpty(this.fields[mdField])) {
+      this.fields[mdField].splice(index, 1);
+      if (this.fields[mdField].length === 0) {
+        this.fieldKeys.splice(this.fieldKeys.indexOf(mdField), 1);
+        delete this.fields[mdField];
+      }
+    }
+  }
+
+  /**
+   * Returns if at least one value within the form contains a change
+   */
+  hasChanges(): boolean {
+    return Object.values(this.fields).some((values: DsoEditMetadataValue[]) => values.some((value: DsoEditMetadataValue) => value.hasChanges()));
+  }
+
+  /**
+   * Check if a metadata field contains changes within its order (place property of values)
+   * @param mdField
+   */
+  hasOrderChanges(mdField: string): boolean {
+    return this.fields[mdField].some((value: DsoEditMetadataValue) => value.originalValue.place !== value.newValue.place);
+  }
+
+  /**
+   * Discard all changes within the form and store their current values within re-instatable properties so they can be
+   * undone afterwards
+   */
+  discard(): void {
+    this.resetReinstatable();
+    // Discard changes from each value from each field
+    Object.entries(this.fields).forEach(([field, values]: [string, DsoEditMetadataValue[]]) => {
+      let removeFromIndex = -1;
+      values.forEach((value: DsoEditMetadataValue, index: number) => {
+        if (value.change === DsoEditMetadataChangeType.ADD) {
+          if (isEmpty(this.reinstatableNewValues[field])) {
+            this.reinstatableNewValues[field] = [];
+          }
+          this.reinstatableNewValues[field].push(value);
+          if (removeFromIndex === -1) {
+            removeFromIndex = index;
+          }
+        } else {
+          value.discardAndMarkReinstatable();
+        }
+      });
+      if (removeFromIndex > -1) {
+        this.fields[field].splice(removeFromIndex, this.fields[field].length - removeFromIndex);
+      }
+    });
+    // Delete new metadata fields
+    this.fieldKeys.forEach((field: string) => {
+      if (this.originalFieldKeys.indexOf(field) < 0) {
+        delete this.fields[field];
+      }
+    });
+    this.fieldKeys = [...this.originalFieldKeys];
+    this.sortFieldKeys();
+    // Reset the order of values within their fields to match their place property
+    this.fieldKeys.forEach((field: string) => {
+      this.setValuesForFieldSorted(field, this.fields[field]);
+    });
+  }
+
+  /**
+   * Reset the order of values within a metadata field to their original places
+   * Update the actual array to match the place properties
+   * @param mdField
+   */
+  resetOrder(mdField: string) {
+    this.fields[mdField].forEach((value: DsoEditMetadataValue) => {
+      value.newValue.place = value.originalValue.place;
+      value.confirmChanges();
+    });
+    this.setValuesForFieldSorted(mdField, this.fields[mdField]);
+  }
+
+  /**
+   * Sort fieldKeys alphabetically
+   * Should be called whenever a field is added to ensure the alphabetical order is kept
+   */
+  sortFieldKeys() {
+    this.fieldKeys.sort((a: string, b: string) => a.localeCompare(b));
+  }
+
+  /**
+   * Undo any previously discarded changes
+   */
+  reinstate(): void {
+    // Reinstate each value
+    Object.values(this.fields).forEach((values: DsoEditMetadataValue[]) => {
+      values.forEach((value: DsoEditMetadataValue) => {
+        value.reinstate();
+      });
+    });
+    // Re-add new values
+    Object.entries(this.reinstatableNewValues).forEach(([field, values]: [string, DsoEditMetadataValue[]]) => {
+      values.forEach((value: DsoEditMetadataValue) => {
+        this.addValueToField(value, field);
+      });
+    });
+    // Reset the order of values within their fields to match their place property
+    this.fieldKeys.forEach((field: string) => {
+      this.setValuesForFieldSorted(field, this.fields[field]);
+    });
+    this.reinstatableNewValues = {};
+  }
+
+  /**
+   * Returns if at least one value contains a re-instatable property, meaning a discard can be reversed
+   */
+  isReinstatable(): boolean {
+    return isNotEmpty(this.reinstatableNewValues) ||
+      Object.values(this.fields)
+        .some((values: DsoEditMetadataValue[]) => values
+          .some((value: DsoEditMetadataValue) => value.isReinstatable()));
+  }
+
+  /**
+   * Reset the state of the re-instatable properties and values
+   */
+  resetReinstatable(): void {
+    this.reinstatableNewValues = {};
+    Object.values(this.fields).forEach((values: DsoEditMetadataValue[]) => {
+      values.forEach((value: DsoEditMetadataValue) => {
+        value.resetReinstatable();
+      });
+    });
+  }
+
+  /**
+   * Set the values of a metadata field and sort them by their newValue's place property
+   * @param mdField
+   * @param values
+   */
+  private setValuesForFieldSorted(mdField: string, values: DsoEditMetadataValue[]) {
+    this.fields[mdField] = values.sort((a: DsoEditMetadataValue, b: DsoEditMetadataValue) => a.newValue.place - b.newValue.place);
+  }
+
+  /**
+   * Get the json PATCH operations for the current changes within this form
+   * For each metadata field, it'll return operations in the following order: replace, remove (from last to first place), add and move
+   * This order is important, as each operation is executed in succession of the previous one
+   */
+  getOperations(moveAnalyser: ArrayMoveChangeAnalyzer<number>): Operation[] {
+    const operations: Operation[] = [];
+    Object.entries(this.fields).forEach(([field, values]: [string, DsoEditMetadataValue[]]) => {
+      const replaceOperations: MetadataPatchReplaceOperation[] = [];
+      const removeOperations: MetadataPatchRemoveOperation[] = [];
+      const addOperations: MetadataPatchAddOperation[] = [];
+      [...values]
+        .sort((a: DsoEditMetadataValue, b: DsoEditMetadataValue) => a.originalValue.place - b.originalValue.place)
+        .forEach((value: DsoEditMetadataValue) => {
+          if (hasValue(value.change)) {
+            if (value.change === DsoEditMetadataChangeType.UPDATE) {
+              // Only changes to value or language are considered "replace" operations. Changes to place are considered "move", which is processed below.
+              if (value.originalValue.value !== value.newValue.value || value.originalValue.language !== value.newValue.language) {
+                replaceOperations.push(new MetadataPatchReplaceOperation(field, value.originalValue.place, {
+                  value: value.newValue.value,
+                  language: value.newValue.language,
+                }));
+              }
+            } else if (value.change === DsoEditMetadataChangeType.REMOVE) {
+              removeOperations.push(new MetadataPatchRemoveOperation(field, value.originalValue.place));
+            } else if (value.change === DsoEditMetadataChangeType.ADD) {
+              addOperations.push(new MetadataPatchAddOperation(field, {
+                value: value.newValue.value,
+                language: value.newValue.language,
+              }));
+            } else {
+              console.warn('Illegal metadata change state detected for', value);
+            }
+          }
+        });
+
+      operations.push(...replaceOperations
+        .map((operation: MetadataPatchReplaceOperation) => operation.toOperation()));
+      operations.push(...removeOperations
+        // Sort remove operations backwards first, because they get executed in order. This avoids one removal affecting the next.
+        .sort((a: MetadataPatchRemoveOperation, b: MetadataPatchRemoveOperation) => b.place - a.place)
+        .map((operation: MetadataPatchRemoveOperation) => operation.toOperation()));
+      operations.push(...addOperations
+        .map((operation: MetadataPatchAddOperation) => operation.toOperation()));
+    });
+    // Calculate and add the move operations that need to happen in order to move value from their old place to their new within the field
+    // This uses an ArrayMoveChangeAnalyzer
+    Object.entries(this.fields).forEach(([field, values]: [string, DsoEditMetadataValue[]]) => {
+      // Exclude values marked for removal, because operations are executed in order (remove first, then move)
+      const valuesWithoutRemoved = values.filter((value: DsoEditMetadataValue) => value.change !== DsoEditMetadataChangeType.REMOVE);
+      const moveOperations = moveAnalyser
+        .diff(
+          [...valuesWithoutRemoved]
+            .sort((a: DsoEditMetadataValue, b: DsoEditMetadataValue) => a.originalValue.place - b.originalValue.place)
+            .map((value: DsoEditMetadataValue) => value.originalValue.place),
+          [...valuesWithoutRemoved]
+            .sort((a: DsoEditMetadataValue, b: DsoEditMetadataValue) => a.newValue.place - b.newValue.place)
+            .map((value: DsoEditMetadataValue) => value.originalValue.place))
+        .map((operation: MoveOperation) => new MetadataPatchMoveOperation(field, +operation.from.substr(1), +operation.path.substr(1)).toOperation());
+      operations.push(...moveOperations);
+    });
+    return operations;
+  }
+}

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-headers/dso-edit-metadata-headers.component.html

@@ -0,0 +1,10 @@
+<div class="d-flex flex-row ds-field-row ds-header-row">
+  <div class="lbl-cell">{{ dsoType + '.edit.metadata.headers.field' | translate }}</div>
+  <div class="flex-grow-1">
+    <div class="d-flex flex-row">
+      <div class="flex-grow-1 ds-flex-cell ds-value-cell"><b class="dont-break-out preserve-line-breaks">{{ dsoType + '.edit.metadata.headers.value' | translate }}</b></div>
+      <div class="ds-flex-cell ds-lang-cell"><b>{{ dsoType + '.edit.metadata.headers.language' | translate }}</b></div>
+      <div class="text-center ds-flex-cell ds-edit-cell"><b>{{ dsoType + '.edit.metadata.headers.edit' | translate }}</b></div>
+    </div>
+  </div>
+</div>

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-headers/dso-edit-metadata-headers.component.scss

@@ -0,0 +1,12 @@
+.lbl-cell {
+  min-width: var(--ds-dso-edit-field-width);
+  max-width: var(--ds-dso-edit-field-width);
+  background-color: var(--bs-gray-100);
+  font-weight: bold;
+  padding: 1rem;
+  border: 1px solid var(--bs-gray-200);
+}
+
+.ds-header-row {
+  background-color: var(--bs-gray-100);
+}

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-headers/dso-edit-metadata-headers.component.spec.ts

@@ -0,0 +1,32 @@
+import { DsoEditMetadataHeadersComponent } from './dso-edit-metadata-headers.component';
+import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
+import { VarDirective } from '../../../shared/utils/var.directive';
+import { TranslateModule } from '@ngx-translate/core';
+import { RouterTestingModule } from '@angular/router/testing';
+import { NO_ERRORS_SCHEMA } from '@angular/core';
+import { By } from '@angular/platform-browser';
+
+describe('DsoEditMetadataHeadersComponent', () => {
+  let component: DsoEditMetadataHeadersComponent;
+  let fixture: ComponentFixture<DsoEditMetadataHeadersComponent>;
+
+  beforeEach(waitForAsync(() => {
+    TestBed.configureTestingModule({
+      declarations: [DsoEditMetadataHeadersComponent, VarDirective],
+      imports: [TranslateModule.forRoot(), RouterTestingModule.withRoutes([])],
+      providers: [
+      ],
+      schemas: [NO_ERRORS_SCHEMA]
+    }).compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(DsoEditMetadataHeadersComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should display three headers', () => {
+    expect(fixture.debugElement.queryAll(By.css('.ds-flex-cell')).length).toEqual(3);
+  });
+});

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-headers/dso-edit-metadata-headers.component.ts

@@ -0,0 +1,17 @@
+import { Component, Input } from '@angular/core';
+
+@Component({
+  selector: 'ds-dso-edit-metadata-headers',
+  styleUrls: ['./dso-edit-metadata-headers.component.scss', '../dso-edit-metadata-shared/dso-edit-metadata-cells.scss'],
+  templateUrl: './dso-edit-metadata-headers.component.html',
+})
+/**
+ * Component displaying the header table row for DSO edit metadata page
+ */
+export class DsoEditMetadataHeadersComponent {
+  /**
+   * Type of DSO we're displaying values for
+   * Determines i18n messages
+   */
+  @Input() dsoType: string;
+}

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-shared/dso-edit-metadata-cells.scss

@@ -0,0 +1,49 @@
+.ds-field-row {
+  border: 1px solid var(--bs-gray-400);
+}
+
+.ds-flex-cell {
+  padding: 1rem;
+  border: 1px solid var(--bs-gray-200);
+}
+
+.ds-lang-cell {
+  min-width: var(--ds-dso-edit-lang-width);
+  max-width: var(--ds-dso-edit-lang-width);
+}
+
+.ds-edit-cell {
+  min-width: var(--ds-dso-edit-actions-width);
+}
+
+.ds-value-row {
+  background-color: white;
+
+  &:active {
+    cursor: grabbing;
+  }
+
+  &.ds-warning {
+    background-color: var(--bs-warning-bg);
+
+    .ds-flex-cell {
+      border: 1px solid var(--bs-warning);
+    }
+  }
+
+  &.ds-danger {
+    background-color: var(--bs-danger-bg);
+
+    .ds-flex-cell {
+      border: 1px solid var(--bs-danger);
+    }
+  }
+
+  &.ds-success {
+    background-color: var(--bs-success-bg);
+
+    .ds-flex-cell {
+      border: 1px solid var(--bs-success);
+    }
+  }
+}

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-value-headers/dso-edit-metadata-value-headers.component.html

@@ -0,0 +1,5 @@
+<div role="row" class="visually-hidden">
+  <div role="columnheader">{{ dsoType + '.edit.metadata.headers.value' | translate }}</div>
+  <div role="columnheader">{{ dsoType + '.edit.metadata.headers.language' | translate }}</div>
+  <div role="columnheader">{{ dsoType + '.edit.metadata.headers.edit' | translate }}</div>
+</div>

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-value-headers/dso-edit-metadata-value-headers.component.ts

@@ -0,0 +1,17 @@
+import { Component, Input } from '@angular/core';
+
+@Component({
+  selector: 'ds-dso-edit-metadata-value-headers',
+  styleUrls: ['./dso-edit-metadata-value-headers.component.scss', '../dso-edit-metadata-shared/dso-edit-metadata-cells.scss'],
+  templateUrl: './dso-edit-metadata-value-headers.component.html',
+})
+/**
+ * Component displaying invisible headers for a list of metadata values using table roles for accessibility
+ */
+export class DsoEditMetadataValueHeadersComponent {
+  /**
+   * Type of DSO we're displaying values for
+   * Determines i18n messages
+   */
+  @Input() dsoType: string;
+}

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-value/dso-edit-metadata-value.component.html

@@ -0,0 +1,56 @@
+<div class="d-flex flex-row ds-value-row" *ngVar="mdValue.newValue.isVirtual as isVirtual" role="row"
+     cdkDrag (cdkDragStarted)="dragging.emit(true)" (cdkDragEnded)="dragging.emit(false)"
+     [ngClass]="{ 'ds-warning': mdValue.reordered || mdValue.change === DsoEditMetadataChangeTypeEnum.UPDATE, 'ds-danger': mdValue.change === DsoEditMetadataChangeTypeEnum.REMOVE, 'ds-success': mdValue.change === DsoEditMetadataChangeTypeEnum.ADD, 'h-100': isOnlyValue }">
+  <div class="flex-grow-1 ds-flex-cell ds-value-cell d-flex align-items-center" *ngVar="(mdRepresentation$ | async) as mdRepresentation" role="cell">
+    <div class="dont-break-out preserve-line-breaks" *ngIf="!mdValue.editing && !mdRepresentation">{{ mdValue.newValue.value }}</div>
+    <textarea class="form-control" rows="5" *ngIf="mdValue.editing && !mdRepresentation" [(ngModel)]="mdValue.newValue.value"
+              [dsDebounce]="300" (onDebounce)="confirm.emit(false)"></textarea>
+    <div class="d-flex" *ngIf="mdRepresentation">
+      <a class="mr-2" target="_blank" [routerLink]="mdRepresentationItemRoute$ | async">{{ mdRepresentationName$ | async }}</a>
+      <ds-type-badge [object]="mdRepresentation"></ds-type-badge>
+    </div>
+  </div>
+  <div class="ds-flex-cell ds-lang-cell" role="cell">
+    <div class="dont-break-out preserve-line-breaks" *ngIf="!mdValue.editing">{{ mdValue.newValue.language }}</div>
+    <input class="form-control" type="text" *ngIf="mdValue.editing" [(ngModel)]="mdValue.newValue.language"
+           [dsDebounce]="300" (onDebounce)="confirm.emit(false)" />
+  </div>
+  <div class="text-center ds-flex-cell ds-edit-cell" role="cell">
+    <div class="btn-group">
+      <div class="edit-field">
+        <div class="btn-group edit-buttons" [ngbTooltip]="isVirtual ? (dsoType + '.edit.metadata.edit.buttons.virtual' | translate) : null">
+          <button class="btn btn-outline-primary btn-sm ng-star-inserted" id="metadata-edit-btn" *ngIf="!mdValue.editing"
+                  [title]="dsoType + '.edit.metadata.edit.buttons.edit' | translate"
+                  ngbTooltip="{{ dsoType + '.edit.metadata.edit.buttons.edit' | translate }}"
+                  [disabled]="isVirtual || mdValue.change === DsoEditMetadataChangeTypeEnum.REMOVE || (saving$ | async)" (click)="edit.emit()">
+            <i class="fas fa-edit fa-fw"></i>
+          </button>
+          <button class="btn btn-outline-success btn-sm ng-star-inserted" id="metadata-confirm-btn" *ngIf="mdValue.editing"
+                  [title]="dsoType + '.edit.metadata.edit.buttons.confirm' | translate"
+                  ngbTooltip="{{ dsoType + '.edit.metadata.edit.buttons.confirm' | translate }}"
+                  [disabled]="isVirtual || (saving$ | async)" (click)="confirm.emit(true)">
+            <i class="fas fa-check fa-fw"></i>
+          </button>
+          <button class="btn btn-outline-danger btn-sm" id="metadata-remove-btn"
+                  [title]="dsoType + '.edit.metadata.edit.buttons.remove' | translate"
+                  ngbTooltip="{{ dsoType + '.edit.metadata.edit.buttons.remove' | translate }}"
+                  [disabled]="isVirtual || (mdValue.change && mdValue.change !== DsoEditMetadataChangeTypeEnum.ADD) || mdValue.editing || (saving$ | async)" (click)="remove.emit()">
+            <i class="fas fa-trash-alt fa-fw"></i>
+          </button>
+          <button class="btn btn-outline-warning btn-sm" id="metadata-undo-btn"
+                  [title]="dsoType + '.edit.metadata.edit.buttons.undo' | translate"
+                  ngbTooltip="{{ dsoType + '.edit.metadata.edit.buttons.undo' | translate }}"
+                  [disabled]="isVirtual || (!mdValue.change && mdValue.reordered) || (!mdValue.change && !mdValue.editing) || (saving$ | async)" (click)="undo.emit()">
+            <i class="fas fa-undo-alt fa-fw"></i>
+          </button>
+        </div>
+      </div>
+      <button class="btn btn-outline-secondary ds-drag-handle btn-sm" id="metadata-drag-btn" *ngVar="(isOnlyValue || (saving$ | async)) as disabled"
+              cdkDragHandle [cdkDragHandleDisabled]="disabled" [ngClass]="{'disabled': disabled}" [disabled]="disabled"
+              [title]="dsoType + '.edit.metadata.edit.buttons.drag' | translate"
+              ngbTooltip="{{ dsoType + '.edit.metadata.edit.buttons.drag' | translate }}">
+        <i class="fas fa-grip-vertical fa-fw"></i>
+      </button>
+    </div>
+  </div>
+</div>

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-value/dso-edit-metadata-value.component.scss

@@ -0,0 +1,16 @@
+.ds-success {
+  background-color: var(--bs-success-bg);
+  border: 1px solid var(--bs-success);
+}
+
+.ds-drag-handle:not(.disabled) {
+  cursor: grab;
+}
+
+::ng-deep .edit-field>ngb-tooltip-window .tooltip-inner {
+  min-width: var(--ds-dso-edit-virtual-tooltip-min-width);
+}
+
+.cdk-drag-placeholder {
+  opacity: 0;
+}

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-value/dso-edit-metadata-value.component.spec.ts

@@ -0,0 +1,170 @@
+import { DsoEditMetadataValueComponent } from './dso-edit-metadata-value.component';
+import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
+import { VarDirective } from '../../../shared/utils/var.directive';
+import { TranslateModule } from '@ngx-translate/core';
+import { RouterTestingModule } from '@angular/router/testing';
+import { DebugElement, NO_ERRORS_SCHEMA } from '@angular/core';
+import { RelationshipDataService } from '../../../core/data/relationship-data.service';
+import { DSONameService } from '../../../core/breadcrumbs/dso-name.service';
+import { of } from 'rxjs/internal/observable/of';
+import { ItemMetadataRepresentation } from '../../../core/shared/metadata-representation/item/item-metadata-representation.model';
+import { MetadataValue, VIRTUAL_METADATA_PREFIX } from '../../../core/shared/metadata.models';
+import { DsoEditMetadataChangeType, DsoEditMetadataValue } from '../dso-edit-metadata-form';
+import { By } from '@angular/platform-browser';
+
+const EDIT_BTN = 'edit';
+const CONFIRM_BTN = 'confirm';
+const REMOVE_BTN = 'remove';
+const UNDO_BTN = 'undo';
+const DRAG_BTN = 'drag';
+
+describe('DsoEditMetadataValueComponent', () => {
+  let component: DsoEditMetadataValueComponent;
+  let fixture: ComponentFixture<DsoEditMetadataValueComponent>;
+
+  let relationshipService: RelationshipDataService;
+  let dsoNameService: DSONameService;
+
+  let editMetadataValue: DsoEditMetadataValue;
+  let metadataValue: MetadataValue;
+
+  function initServices(): void {
+    relationshipService = jasmine.createSpyObj('relationshipService', {
+      resolveMetadataRepresentation: of(new ItemMetadataRepresentation(metadataValue)),
+    });
+    dsoNameService = jasmine.createSpyObj('dsoNameService', {
+      getName: 'Related Name',
+    });
+  }
+
+  beforeEach(waitForAsync(() => {
+    metadataValue = Object.assign(new MetadataValue(), {
+      value: 'Regular Name',
+      language: 'en',
+      place: 0,
+      authority: undefined,
+    });
+    editMetadataValue = new DsoEditMetadataValue(metadataValue);
+
+    initServices();
+
+    TestBed.configureTestingModule({
+      declarations: [DsoEditMetadataValueComponent, VarDirective],
+      imports: [TranslateModule.forRoot(), RouterTestingModule.withRoutes([])],
+      providers: [
+        { provide: RelationshipDataService, useValue: relationshipService },
+        { provide: DSONameService, useValue: dsoNameService },
+      ],
+      schemas: [NO_ERRORS_SCHEMA]
+    }).compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(DsoEditMetadataValueComponent);
+    component = fixture.componentInstance;
+    component.mdValue = editMetadataValue;
+    component.saving$ = of(false);
+    fixture.detectChanges();
+  });
+
+  it('should not show a badge', () => {
+    expect(fixture.debugElement.query(By.css('ds-type-badge'))).toBeNull();
+  });
+
+  describe('when no changes have been made', () => {
+    assertButton(EDIT_BTN, true, false);
+    assertButton(CONFIRM_BTN, false);
+    assertButton(REMOVE_BTN, true, false);
+    assertButton(UNDO_BTN, true, true);
+    assertButton(DRAG_BTN, true, false);
+  });
+
+  describe('when this is the only metadata value within its field', () => {
+    beforeEach(() => {
+      component.isOnlyValue = true;
+      fixture.detectChanges();
+    });
+
+    assertButton(DRAG_BTN, true, true);
+  });
+
+  describe('when the value is marked for removal', () => {
+    beforeEach(() => {
+      editMetadataValue.change = DsoEditMetadataChangeType.REMOVE;
+      fixture.detectChanges();
+    });
+
+    assertButton(REMOVE_BTN, true, true);
+    assertButton(UNDO_BTN, true, false);
+  });
+
+  describe('when the value is being edited', () => {
+    beforeEach(() => {
+      editMetadataValue.editing = true;
+      fixture.detectChanges();
+    });
+
+    assertButton(EDIT_BTN, false);
+    assertButton(CONFIRM_BTN, true, false);
+    assertButton(UNDO_BTN, true, false);
+  });
+
+  describe('when the value is new', () => {
+    beforeEach(() => {
+      editMetadataValue.change = DsoEditMetadataChangeType.ADD;
+      fixture.detectChanges();
+    });
+
+    assertButton(REMOVE_BTN, true, false);
+    assertButton(UNDO_BTN, true, false);
+  });
+
+  describe('when the metadata value is virtual', () => {
+    beforeEach(() => {
+      metadataValue = Object.assign(new MetadataValue(), {
+        value: 'Virtual Name',
+        language: 'en',
+        place: 0,
+        authority: `${VIRTUAL_METADATA_PREFIX}authority-key`,
+      });
+      editMetadataValue = new DsoEditMetadataValue(metadataValue);
+      component.mdValue = editMetadataValue;
+      component.ngOnInit();
+      fixture.detectChanges();
+    });
+
+    it('should show a badge', () => {
+      expect(fixture.debugElement.query(By.css('ds-type-badge'))).toBeTruthy();
+    });
+
+    assertButton(EDIT_BTN, true, true);
+    assertButton(CONFIRM_BTN, false);
+    assertButton(REMOVE_BTN, true, true);
+    assertButton(UNDO_BTN, true, true);
+    assertButton(DRAG_BTN, true, false);
+  });
+
+  function assertButton(name: string, exists: boolean, disabled: boolean = false): void {
+    describe(`${name} button`, () => {
+      let btn: DebugElement;
+
+      beforeEach(() => {
+        btn = fixture.debugElement.query(By.css(`#metadata-${name}-btn`));
+      });
+
+      if (exists) {
+        it('should exist', () => {
+          expect(btn).toBeTruthy();
+        });
+
+        it(`should${disabled ? ' ' : ' not '}be disabled`, () => {
+          expect(btn.nativeElement.disabled).toBe(disabled);
+        });
+      } else {
+        it('should not exist', () => {
+          expect(btn).toBeNull();
+        });
+      }
+    });
+  }
+});

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata-value/dso-edit-metadata-value.component.ts

@@ -0,0 +1,126 @@
+import { Component, EventEmitter, Input, OnInit, Output } from '@angular/core';
+import { DsoEditMetadataChangeType, DsoEditMetadataValue } from '../dso-edit-metadata-form';
+import { Observable } from 'rxjs/internal/Observable';
+import {
+  MetadataRepresentation,
+  MetadataRepresentationType
+} from '../../../core/shared/metadata-representation/metadata-representation.model';
+import { RelationshipDataService } from '../../../core/data/relationship-data.service';
+import { DSpaceObject } from '../../../core/shared/dspace-object.model';
+import { ItemMetadataRepresentation } from '../../../core/shared/metadata-representation/item/item-metadata-representation.model';
+import { map } from 'rxjs/operators';
+import { getItemPageRoute } from '../../../item-page/item-page-routing-paths';
+import { DSONameService } from '../../../core/breadcrumbs/dso-name.service';
+import { EMPTY } from 'rxjs/internal/observable/empty';
+
+@Component({
+  selector: 'ds-dso-edit-metadata-value',
+  styleUrls: ['./dso-edit-metadata-value.component.scss', '../dso-edit-metadata-shared/dso-edit-metadata-cells.scss'],
+  templateUrl: './dso-edit-metadata-value.component.html',
+})
+/**
+ * Component displaying a single editable row for a metadata value
+ */
+export class DsoEditMetadataValueComponent implements OnInit {
+  /**
+   * The parent {@link DSpaceObject} to display a metadata form for
+   * Also used to determine metadata-representations in case of virtual metadata
+   */
+  @Input() dso: DSpaceObject;
+
+  /**
+   * Editable metadata value to show
+   */
+  @Input() mdValue: DsoEditMetadataValue;
+
+  /**
+   * Type of DSO we're displaying values for
+   * Determines i18n messages
+   */
+  @Input() dsoType: string;
+
+  /**
+   * Observable to check if the form is being saved or not
+   * Will disable certain functionality while saving
+   */
+  @Input() saving$: Observable<boolean>;
+
+  /**
+   * Is this value the only one within its list?
+   * Will disable certain functionality like dragging (because dragging within a list of 1 is pointless)
+   */
+  @Input() isOnlyValue = false;
+
+  /**
+   * Emits when the user clicked edit
+   */
+  @Output() edit: EventEmitter<any> = new EventEmitter<any>();
+
+  /**
+   * Emits when the user clicked confirm
+   */
+  @Output() confirm: EventEmitter<boolean> = new EventEmitter<boolean>();
+
+  /**
+   * Emits when the user clicked remove
+   */
+  @Output() remove: EventEmitter<any> = new EventEmitter<any>();
+
+  /**
+   * Emits when the user clicked undo
+   */
+  @Output() undo: EventEmitter<any> = new EventEmitter<any>();
+
+  /**
+   * Emits true when the user starts dragging a value, false when the user stops dragging
+   */
+  @Output() dragging: EventEmitter<boolean> = new EventEmitter<boolean>();
+
+  /**
+   * The DsoEditMetadataChangeType enumeration for access in the component's template
+   * @type {DsoEditMetadataChangeType}
+   */
+  public DsoEditMetadataChangeTypeEnum = DsoEditMetadataChangeType;
+
+  /**
+   * The item this metadata value represents in case it's virtual (if any, otherwise null)
+   */
+  mdRepresentation$: Observable<ItemMetadataRepresentation | null>;
+
+  /**
+   * The route to the item represented by this virtual metadata value (otherwise null)
+   */
+  mdRepresentationItemRoute$: Observable<string | null>;
+
+  /**
+   * The name of the item represented by this virtual metadata value (otherwise null)
+   */
+  mdRepresentationName$: Observable<string | null>;
+
+  constructor(protected relationshipService: RelationshipDataService,
+              protected dsoNameService: DSONameService) {
+  }
+
+  ngOnInit(): void {
+    this.initVirtualProperties();
+  }
+
+  /**
+   * Initialise potential properties of a virtual metadata value
+   */
+  initVirtualProperties(): void {
+    this.mdRepresentation$ = this.mdValue.newValue.isVirtual ?
+      this.relationshipService.resolveMetadataRepresentation(this.mdValue.newValue, this.dso, 'Item')
+        .pipe(
+          map((mdRepresentation: MetadataRepresentation) =>
+            mdRepresentation.representationType === MetadataRepresentationType.Item ? mdRepresentation as ItemMetadataRepresentation : null
+          )
+        ) : EMPTY;
+    this.mdRepresentationItemRoute$ = this.mdRepresentation$.pipe(
+      map((mdRepresentation: ItemMetadataRepresentation) => mdRepresentation ? getItemPageRoute(mdRepresentation) : null),
+    );
+    this.mdRepresentationName$ = this.mdRepresentation$.pipe(
+      map((mdRepresentation: ItemMetadataRepresentation) => mdRepresentation ? this.dsoNameService.getName(mdRepresentation) : null),
+    );
+  }
+}

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata.component.html

@@ -0,0 +1,91 @@
+<div class="item-metadata" *ngIf="form">
+  <div class="button-row top d-flex my-2 space-children-mr ml-gap">
+    <button class="mr-auto btn btn-success" id="dso-add-btn" [disabled]="form.newValue || (saving$ | async)"
+            [title]="dsoType + '.edit.metadata.add-button' | translate"
+            (click)="add()"><i class="fas fa-plus"></i>
+      <span class="d-none d-sm-inline">&nbsp;{{ dsoType + '.edit.metadata.add-button' | translate }}</span>
+    </button>
+    <button class="btn btn-warning ml-1" id="dso-reinstate-btn" *ngIf="isReinstatable" [disabled]="(saving$ | async)"
+            [title]="dsoType + '.edit.metadata.reinstate-button' | translate"
+            (click)="reinstate()"><i class="fas fa-undo-alt"></i>
+      <span class="d-none d-sm-inline">&nbsp;{{ dsoType + '.edit.metadata.reinstate-button' | translate }}</span>
+    </button>
+    <button class="btn btn-primary ml-1" id="dso-save-btn" [disabled]="!hasChanges || (saving$ | async)"
+            [title]="dsoType + '.edit.metadata.save-button' | translate"
+            (click)="submit()"><i class="fas fa-save"></i>
+      <span class="d-none d-sm-inline">&nbsp;{{ dsoType + '.edit.metadata.save-button' | translate }}</span>
+    </button>
+    <button class="btn btn-danger ml-1" id="dso-discard-btn" *ngIf="!isReinstatable"
+            [title]="dsoType + '.edit.metadata.discard-button' | translate"
+            [disabled]="!hasChanges || (saving$ | async)"
+            (click)="discard()"><i class="fas fa-times"></i>
+      <span class="d-none d-sm-inline">&nbsp;{{ dsoType + '.edit.metadata.discard-button' | translate }}</span>
+    </button>
+  </div>
+
+  <div role="table" [attr.aria-label]="'item.edit.head' | translate">
+    <ds-dso-edit-metadata-headers [dsoType]="dsoType"></ds-dso-edit-metadata-headers>
+    <div class="d-flex flex-row ds-field-row" role="row" *ngIf="form.newValue">
+      <div class="lbl-cell ds-success" role="rowheader">
+        <ds-metadata-field-selector [dsoType]="dsoType"
+                                    [(mdField)]="newMdField"
+                                    [autofocus]="true">
+        </ds-metadata-field-selector>
+      </div>
+      <div class="flex-grow-1 ds-drop-list" role="cell">
+        <div role="table">
+          <ds-dso-edit-metadata-value-headers role="presentation" [dsoType]="dsoType"></ds-dso-edit-metadata-value-headers>
+          <ds-dso-edit-metadata-value [dso]="dso"
+                                      [mdValue]="form.newValue"
+                                      [dsoType]="dsoType"
+                                      [saving$]="savingOrLoadingFieldValidation$"
+                                      [isOnlyValue]="true"
+                                      (confirm)="confirmNewValue($event)"
+                                      (remove)="form.newValue = undefined"
+                                      (undo)="form.newValue = undefined">
+          </ds-dso-edit-metadata-value>
+        </div>
+      </div>
+    </div>
+    <div class="d-flex flex-row ds-field-row" role="row" *ngFor="let mdField of form.fieldKeys">
+      <div class="lbl-cell" role="rowheader">
+        <span class="dont-break-out preserve-line-breaks">{{ mdField }}</span>
+        <div class="btn btn-warning reset-order-button mt-2 w-100" *ngIf="form.hasOrderChanges(mdField)"
+             (click)="form.resetOrder(mdField); onValueSaved()">
+          {{ dsoType + '.edit.metadata.reset-order-button' | translate }}
+        </div>
+      </div>
+      <ds-dso-edit-metadata-field-values class="flex-grow-1" role="cell"
+                                         [dso]="dso"
+                                         [form]="form"
+                                         [dsoType]="dsoType"
+                                         [saving$]="saving$"
+                                         [draggingMdField$]="draggingMdField$"
+                                         [mdField]="mdField"
+                                         (valueSaved)="onValueSaved()">
+      </ds-dso-edit-metadata-field-values>
+    </div>
+  </div>
+
+  <div *ngIf="isEmpty && !form.newValue">
+    <ds-alert [content]="dsoType + '.edit.metadata.empty'" [type]="AlertTypeEnum.Info"></ds-alert>
+  </div>
+  <div class="button-row bottom d-inline-block w-100">
+    <div class="mt-2 float-right space-children-mr ml-gap">
+      <button class="btn btn-warning" *ngIf="isReinstatable" [disabled]="(saving$ | async)"
+              [title]="dsoType + '.edit.metadata.reinstate-button' | translate"
+              (click)="reinstate()"><i class="fas fa-undo-alt"></i> {{ dsoType + '.edit.metadata.reinstate-button' | translate }}
+      </button>
+      <button class="btn btn-primary" [disabled]="!hasChanges || (saving$ | async)"
+              [title]="dsoType + '.edit.metadata.save-button' | translate"
+              (click)="submit()"><i class="fas fa-save"></i> {{ dsoType + '.edit.metadata.save-button' | translate }}
+      </button>
+      <button class="btn btn-danger" *ngIf="!isReinstatable"
+              [title]="dsoType + '.edit.metadata.discard-button' | translate"
+              [disabled]="!hasChanges || (saving$ | async)"
+              (click)="discard()"><i class="fas fa-times"></i> {{ dsoType + '.edit.metadata.discard-button' | translate }}
+      </button>
+    </div>
+  </div>
+</div>
+<ds-loading *ngIf="!form"></ds-loading>

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata.component.scss

@@ -0,0 +1,21 @@
+.lbl-cell {
+  min-width: var(--ds-dso-edit-field-width);
+  max-width: var(--ds-dso-edit-field-width);
+  background-color: var(--bs-gray-100);
+  font-weight: bold;
+  padding: 1rem;
+  border: 1px solid var(--bs-gray-200);
+
+  &.ds-success {
+    background-color: var(--bs-success-bg);
+    border: 1px solid var(--bs-success);
+  }
+}
+
+.ds-field-row {
+  border: 1px solid var(--bs-gray-400);
+}
+
+.reset-order-button:hover {
+  cursor: pointer;
+}

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata.component.spec.ts

@@ -0,0 +1,193 @@
+import { DsoEditMetadataComponent } from './dso-edit-metadata.component';
+import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
+import { VarDirective } from '../../shared/utils/var.directive';
+import { TranslateModule } from '@ngx-translate/core';
+import { RouterTestingModule } from '@angular/router/testing';
+import { DebugElement, Injectable, NO_ERRORS_SCHEMA } from '@angular/core';
+import { DSpaceObject } from '../../core/shared/dspace-object.model';
+import { Item } from '../../core/shared/item.model';
+import { MetadataValue } from '../../core/shared/metadata.models';
+import { createSuccessfulRemoteDataObject$ } from '../../shared/remote-data.utils';
+import { By } from '@angular/platform-browser';
+import { NotificationsService } from '../../shared/notifications/notifications.service';
+import { ArrayMoveChangeAnalyzer } from '../../core/data/array-move-change-analyzer.service';
+import { ITEM } from '../../core/shared/item.resource-type';
+import { DATA_SERVICE_FACTORY } from '../../core/data/base/data-service.decorator';
+import { Operation } from 'fast-json-patch';
+import { RemoteData } from '../../core/data/remote-data';
+import { Observable } from 'rxjs/internal/Observable';
+
+const ADD_BTN = 'add';
+const REINSTATE_BTN = 'reinstate';
+const SAVE_BTN = 'save';
+const DISCARD_BTN = 'discard';
+
+@Injectable()
+class TestDataService {
+  patch(object: Item, operations: Operation[]): Observable<RemoteData<Item>> {
+    return createSuccessfulRemoteDataObject$(object);
+  }
+}
+
+describe('DsoEditMetadataComponent', () => {
+  let component: DsoEditMetadataComponent;
+  let fixture: ComponentFixture<DsoEditMetadataComponent>;
+
+  let notificationsService: NotificationsService;
+
+  let dso: DSpaceObject;
+
+  beforeEach(waitForAsync(() => {
+    dso = Object.assign(new Item(), {
+      type: ITEM,
+      metadata: {
+        'dc.title': [
+          Object.assign(new MetadataValue(), {
+            value: 'Test Title',
+            language: 'en',
+            place: 0,
+          }),
+        ],
+        'dc.subject': [
+          Object.assign(new MetadataValue(), {
+            value: 'Subject One',
+            language: 'en',
+            place: 0,
+          }),
+          Object.assign(new MetadataValue(), {
+            value: 'Subject Two',
+            language: 'en',
+            place: 1,
+          }),
+          Object.assign(new MetadataValue(), {
+            value: 'Subject Three',
+            language: 'en',
+            place: 2,
+          }),
+        ],
+      },
+    });
+
+    notificationsService = jasmine.createSpyObj('notificationsService', ['error', 'success']);
+
+    TestBed.configureTestingModule({
+      declarations: [DsoEditMetadataComponent, VarDirective],
+      imports: [TranslateModule.forRoot(), RouterTestingModule.withRoutes([])],
+      providers: [
+        TestDataService,
+        { provide: DATA_SERVICE_FACTORY, useValue: jasmine.createSpy('getDataServiceFor').and.returnValue(TestDataService) },
+        { provide: NotificationsService, useValue: notificationsService },
+        ArrayMoveChangeAnalyzer,
+      ],
+      schemas: [NO_ERRORS_SCHEMA]
+    }).compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(DsoEditMetadataComponent);
+    component = fixture.componentInstance;
+    component.dso = dso;
+    fixture.detectChanges();
+  });
+
+  describe('when no changes have been made', () => {
+    assertButton(ADD_BTN, true, false);
+    assertButton(REINSTATE_BTN, false);
+    assertButton(SAVE_BTN, true, true);
+    assertButton(DISCARD_BTN, true, true);
+  });
+
+  describe('when the form contains changes', () => {
+    beforeEach(() => {
+      component.form.fields['dc.title'][0].newValue.value = 'Updated Title Once';
+      component.form.fields['dc.title'][0].confirmChanges();
+      component.form.resetReinstatable();
+      component.onValueSaved();
+      fixture.detectChanges();
+    });
+
+    assertButton(SAVE_BTN, true, false);
+    assertButton(DISCARD_BTN, true, false);
+
+    describe('and they were discarded', () => {
+      beforeEach(() => {
+        component.discard();
+        fixture.detectChanges();
+      });
+
+      assertButton(REINSTATE_BTN, true, false);
+      assertButton(SAVE_BTN, true, true);
+      assertButton(DISCARD_BTN, false);
+
+      describe('and a new change is made', () => {
+        beforeEach(() => {
+          component.form.fields['dc.title'][0].newValue.value = 'Updated Title Twice';
+          component.form.fields['dc.title'][0].confirmChanges();
+          component.form.resetReinstatable();
+          component.onValueSaved();
+          fixture.detectChanges();
+        });
+
+        assertButton(REINSTATE_BTN, false);
+        assertButton(SAVE_BTN, true, false);
+        assertButton(DISCARD_BTN, true, false);
+      });
+    });
+  });
+
+  describe('when a new value is present', () => {
+    beforeEach(() => {
+      component.add();
+      fixture.detectChanges();
+    });
+
+    assertButton(ADD_BTN, true, true);
+
+    it('should display a row with a field selector and metadata value', () => {
+      expect(fixture.debugElement.query(By.css('ds-metadata-field-selector'))).toBeTruthy();
+      expect(fixture.debugElement.query(By.css('ds-dso-edit-metadata-value'))).toBeTruthy();
+    });
+
+    describe('and gets assigned to a metadata field', () => {
+      beforeEach(() => {
+        component.form.newValue.newValue.value = 'New Subject';
+        component.form.setMetadataField('dc.subject');
+        component.form.resetReinstatable();
+        component.onValueSaved();
+        fixture.detectChanges();
+      });
+
+      assertButton(ADD_BTN, true, false);
+
+      it('should not display the separate row with field selector and metadata value anymore', () => {
+        expect(fixture.debugElement.query(By.css('ds-metadata-field-selector'))).toBeNull();
+        expect(fixture.debugElement.query(By.css('ds-dso-edit-metadata-value'))).toBeNull();
+      });
+    });
+  });
+
+  function assertButton(name: string, exists: boolean, disabled: boolean = false): void {
+    describe(`${name} button`, () => {
+      let btn: DebugElement;
+
+      beforeEach(() => {
+        btn = fixture.debugElement.query(By.css(`#dso-${name}-btn`));
+      });
+
+      if (exists) {
+        it('should exist', () => {
+          expect(btn).toBeTruthy();
+        });
+
+        it(`should${disabled ? ' ' : ' not '}be disabled`, () => {
+          expect(btn.nativeElement.disabled).toBe(disabled);
+        });
+      } else {
+        it('should not exist', () => {
+          expect(btn).toBeNull();
+        });
+      }
+    });
+  }
+
+});

src/app/dso-shared/dso-edit-metadata/dso-edit-metadata.component.ts

@@ -0,0 +1,261 @@
+import { Component, Inject, Injector, Input, OnDestroy, OnInit, ViewChild } from '@angular/core';
+import { AlertType } from '../../shared/alert/aletr-type';
+import { DSpaceObject } from '../../core/shared/dspace-object.model';
+import { DsoEditMetadataForm } from './dso-edit-metadata-form';
+import { map } from 'rxjs/operators';
+import { ActivatedRoute, Data } from '@angular/router';
+import { combineLatest as observableCombineLatest } from 'rxjs/internal/observable/combineLatest';
+import { Subscription } from 'rxjs/internal/Subscription';
+import { RemoteData } from '../../core/data/remote-data';
+import { hasNoValue, hasValue } from '../../shared/empty.util';
+import { BehaviorSubject } from 'rxjs/internal/BehaviorSubject';
+import {
+  getFirstCompletedRemoteData,
+} from '../../core/shared/operators';
+import { UpdateDataService } from '../../core/data/update-data.service';
+import { ResourceType } from '../../core/shared/resource-type';
+import { NotificationsService } from '../../shared/notifications/notifications.service';
+import { TranslateService } from '@ngx-translate/core';
+import { MetadataFieldSelectorComponent } from './metadata-field-selector/metadata-field-selector.component';
+import { Observable } from 'rxjs/internal/Observable';
+import { ArrayMoveChangeAnalyzer } from '../../core/data/array-move-change-analyzer.service';
+import { DATA_SERVICE_FACTORY } from '../../core/data/base/data-service.decorator';
+import { GenericConstructor } from '../../core/shared/generic-constructor';
+import { HALDataService } from '../../core/data/base/hal-data-service.interface';
+
+@Component({
+  selector: 'ds-dso-edit-metadata',
+  styleUrls: ['./dso-edit-metadata.component.scss'],
+  templateUrl: './dso-edit-metadata.component.html',
+})
+/**
+ * Component showing a table of all metadata on a DSpaceObject and options to modify them
+ */
+export class DsoEditMetadataComponent implements OnInit, OnDestroy {
+  /**
+   * DSpaceObject to edit metadata for
+   */
+  @Input() dso: DSpaceObject;
+
+  /**
+   * Reference to the component responsible for showing a metadata-field selector
+   * Used to validate its contents (existing metadata field) before adding a new metadata value
+   */
+  @ViewChild(MetadataFieldSelectorComponent) metadataFieldSelectorComponent: MetadataFieldSelectorComponent;
+
+  /**
+   * Resolved update data-service for the given DSpaceObject (depending on its type, e.g. ItemDataService for an Item)
+   * Used to send the PATCH request
+   */
+  @Input() updateDataService: UpdateDataService<DSpaceObject>;
+
+  /**
+   * Type of the DSpaceObject in String
+   * Used to resolve i18n messages
+   */
+  dsoType: string;
+
+  /**
+   * A dynamic form object containing all information about the metadata and the changes made to them, see {@link DsoEditMetadataForm}
+   */
+  form: DsoEditMetadataForm;
+
+  /**
+   * The metadata field entered by the user for a new metadata value
+   */
+  newMdField: string;
+
+  // Properties determined by the state of the dynamic form, updated by onValueSaved()
+  isReinstatable: boolean;
+  hasChanges: boolean;
+  isEmpty: boolean;
+
+  /**
+   * Whether or not the form is currently being submitted
+   */
+  saving$: BehaviorSubject<boolean> = new BehaviorSubject<boolean>(false);
+
+  /**
+   * Tracks for which metadata-field a drag operation is taking place
+   * Null when no drag is currently happening for any field
+   * This is a BehaviorSubject that is passed down to child components, to give them the power to alter the state
+   */
+  draggingMdField$: BehaviorSubject<string> = new BehaviorSubject<string>(null);
+
+  /**
+   * Whether or not the metadata field is currently being validated
+   */
+  loadingFieldValidation$: BehaviorSubject<boolean> = new BehaviorSubject<boolean>(false);
+
+  /**
+   * Combination of saving$ and loadingFieldValidation$
+   * Emits true when any of the two emit true
+   */
+  savingOrLoadingFieldValidation$: Observable<boolean>;
+
+  /**
+   * The AlertType enumeration for access in the component's template
+   * @type {AlertType}
+   */
+  public AlertTypeEnum = AlertType;
+
+  /**
+   * Subscription for updating the current DSpaceObject
+   * Unsubscribed from in ngOnDestroy()
+   */
+  dsoUpdateSubscription: Subscription;
+
+  constructor(protected route: ActivatedRoute,
+              protected notificationsService: NotificationsService,
+              protected translateService: TranslateService,
+              protected parentInjector: Injector,
+              protected arrayMoveChangeAnalyser: ArrayMoveChangeAnalyzer<number>,
+              @Inject(DATA_SERVICE_FACTORY) protected getDataServiceFor: (resourceType: ResourceType) => GenericConstructor<HALDataService<any>>) {
+  }
+
+  /**
+   * Read the route (or parent route)'s data to retrieve the current DSpaceObject
+   * After it's retrieved, initialise the data-service and form
+   */
+  ngOnInit(): void {
+    if (hasNoValue(this.dso)) {
+      this.dsoUpdateSubscription = observableCombineLatest([this.route.data, this.route.parent.data]).pipe(
+        map(([data, parentData]: [Data, Data]) => Object.assign({}, data, parentData)),
+        map((data: any) => data.dso)
+      ).subscribe((rd: RemoteData<DSpaceObject>) => {
+        this.dso = rd.payload;
+        this.initDataService();
+        this.initForm();
+      });
+    } else {
+      this.initDataService();
+      this.initForm();
+    }
+    this.savingOrLoadingFieldValidation$ = observableCombineLatest([this.saving$, this.loadingFieldValidation$]).pipe(
+      map(([saving, loading]: [boolean, boolean]) => saving || loading),
+    );
+  }
+
+  /**
+   * Initialise (resolve) the data-service for the current DSpaceObject
+   */
+  initDataService(): void {
+    let type: ResourceType;
+    if (typeof this.dso.type === 'string') {
+      type = new ResourceType(this.dso.type);
+    } else {
+      type = this.dso.type;
+    }
+    if (hasNoValue(this.updateDataService)) {
+      const provider = this.getDataServiceFor(type);
+      this.updateDataService = Injector.create({
+        providers: [],
+        parent: this.parentInjector
+      }).get(provider);
+    }
+    this.dsoType = type.value;
+  }
+
+  /**
+   * Initialise the dynamic form object by passing the DSpaceObject's metadata
+   * Call onValueSaved() to update the form's state properties
+   */
+  initForm(): void {
+    this.form = new DsoEditMetadataForm(this.dso.metadata);
+    this.onValueSaved();
+  }
+
+  /**
+   * Update the form's state properties
+   */
+  onValueSaved(): void {
+    this.hasChanges = this.form.hasChanges();
+    this.isReinstatable = this.form.isReinstatable();
+    this.isEmpty = Object.keys(this.form.fields).length === 0;
+  }
+
+  /**
+   * Submit the current changes to the form by retrieving json PATCH operations from the form and sending it to the
+   * DSpaceObject's data-service
+   * Display notificiations and reset the form afterwards if successful
+   */
+  submit(): void {
+    this.saving$.next(true);
+    this.updateDataService.patch(this.dso, this.form.getOperations(this.arrayMoveChangeAnalyser)).pipe(
+      getFirstCompletedRemoteData()
+    ).subscribe((rd: RemoteData<DSpaceObject>) => {
+      this.saving$.next(false);
+      if (rd.hasFailed) {
+        this.notificationsService.error(this.translateService.instant(`${this.dsoType}.edit.metadata.notifications.error.title`), rd.errorMessage);
+      } else {
+        this.notificationsService.success(
+            this.translateService.instant(`${this.dsoType}.edit.metadata.notifications.saved.title`),
+            this.translateService.instant(`${this.dsoType}.edit.metadata.notifications.saved.content`)
+        );
+        this.dso = rd.payload;
+        this.initForm();
+      }
+    });
+  }
+
+  /**
+   * Confirm the newly added value
+   * @param saved Whether or not the value was manually saved (only then, add the value to its metadata field)
+   */
+  confirmNewValue(saved: boolean): void {
+    if (saved) {
+      this.setMetadataField();
+    }
+  }
+
+  /**
+   * Set the metadata field of the temporary added new metadata value
+   * This will move the new value to its respective parent metadata field
+   * Validate the metadata field first
+   */
+  setMetadataField(): void {
+    this.form.resetReinstatable();
+    this.loadingFieldValidation$.next(true);
+    this.metadataFieldSelectorComponent.validate().subscribe((valid: boolean) => {
+      this.loadingFieldValidation$.next(false);
+      if (valid) {
+        this.form.setMetadataField(this.newMdField);
+        this.onValueSaved();
+      }
+    });
+  }
+
+  /**
+   * Add a new temporary metadata value
+   */
+  add(): void {
+    this.newMdField = undefined;
+    this.form.add();
+  }
+
+  /**
+   * Discard all changes within the current form
+   */
+  discard(): void {
+    this.form.discard();
+    this.onValueSaved();
+  }
+
+  /**
+   * Restore any changes previously discarded from the form
+   */
+  reinstate(): void {
+    this.form.reinstate();
+    this.onValueSaved();
+  }
+
+  /**
+   * Unsubscribe from any open subscriptions
+   */
+  ngOnDestroy(): void {
+    if (hasValue(this.dsoUpdateSubscription)) {
+      this.dsoUpdateSubscription.unsubscribe();
+    }
+  }
+
+}

src/app/dso-shared/dso-edit-metadata/metadata-field-selector/metadata-field-selector.component.html

@@ -0,0 +1,19 @@
+<div class="w-100 position-relative">
+  <input type="text" #mdFieldInput
+         class="form-control" [ngClass]="{ 'is-invalid': showInvalid }"
+         [value]="mdField"
+         [formControl]="input"
+         (focusin)="query$.next(mdField)"
+         (dsClickOutside)="query$.next(null)"
+         (click)="$event.stopPropagation();" />
+  <div class="invalid-feedback show-feedback" *ngIf="showInvalid">{{ dsoType + '.edit.metadata.metadatafield.invalid' | translate }}</div>
+  <div class="autocomplete dropdown-menu" [ngClass]="{'show': (mdFieldOptions$ | async)?.length > 0}">
+    <div class="dropdown-list">
+      <div *ngFor="let mdFieldOption of (mdFieldOptions$ | async)">
+        <a href="javascript:void(0);" class="d-block dropdown-item" (click)="select(mdFieldOption)">
+          <span [innerHTML]="mdFieldOption"></span>
+        </a>
+      </div>
+    </div>
+  </div>
+</div>

src/app/dso-shared/dso-edit-metadata/metadata-field-selector/metadata-field-selector.component.spec.ts

@@ -0,0 +1,122 @@
+import { MetadataFieldSelectorComponent } from './metadata-field-selector.component';
+import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
+import { VarDirective } from '../../../shared/utils/var.directive';
+import { TranslateModule } from '@ngx-translate/core';
+import { RouterTestingModule } from '@angular/router/testing';
+import { NO_ERRORS_SCHEMA } from '@angular/core';
+import { RegistryService } from '../../../core/registry/registry.service';
+import { MetadataField } from '../../../core/metadata/metadata-field.model';
+import { MetadataSchema } from '../../../core/metadata/metadata-schema.model';
+import { createFailedRemoteDataObject$, createSuccessfulRemoteDataObject$ } from '../../../shared/remote-data.utils';
+import { createPaginatedList } from '../../../shared/testing/utils.test';
+import { followLink } from '../../../shared/utils/follow-link-config.model';
+import { By } from '@angular/platform-browser';
+import { NotificationsService } from '../../../shared/notifications/notifications.service';
+
+describe('MetadataFieldSelectorComponent', () => {
+  let component: MetadataFieldSelectorComponent;
+  let fixture: ComponentFixture<MetadataFieldSelectorComponent>;
+
+  let registryService: RegistryService;
+  let notificationsService: NotificationsService;
+
+  let metadataSchema: MetadataSchema;
+  let metadataFields: MetadataField[];
+
+  beforeEach(waitForAsync(() => {
+    metadataSchema = Object.assign(new MetadataSchema(), {
+      id: 0,
+      prefix: 'dc',
+      namespace: 'http://dublincore.org/documents/dcmi-terms/',
+    });
+    metadataFields = [
+      Object.assign(new MetadataField(), {
+        id: 0,
+        element: 'description',
+        qualifier: undefined,
+        schema: createSuccessfulRemoteDataObject$(metadataSchema),
+      }),
+      Object.assign(new MetadataField(), {
+        id: 1,
+        element: 'description',
+        qualifier: 'abstract',
+        schema: createSuccessfulRemoteDataObject$(metadataSchema),
+      }),
+    ];
+
+    registryService = jasmine.createSpyObj('registryService', {
+      queryMetadataFields: createSuccessfulRemoteDataObject$(createPaginatedList(metadataFields)),
+    });
+    notificationsService = jasmine.createSpyObj('notificationsService', ['error', 'success']);
+
+    TestBed.configureTestingModule({
+      declarations: [MetadataFieldSelectorComponent, VarDirective],
+      imports: [TranslateModule.forRoot(), RouterTestingModule.withRoutes([])],
+      providers: [
+        { provide: RegistryService, useValue: registryService },
+        { provide: NotificationsService, useValue: notificationsService },
+      ],
+      schemas: [NO_ERRORS_SCHEMA]
+    }).compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(MetadataFieldSelectorComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  describe('when a query is entered', () => {
+    const query = 'test query';
+
+    beforeEach(() => {
+      component.showInvalid = true;
+      component.query$.next(query);
+    });
+
+    it('should reset showInvalid', () => {
+      expect(component.showInvalid).toBeFalse();
+    });
+
+    it('should query the registry service for metadata fields and include the schema', () => {
+      expect(registryService.queryMetadataFields).toHaveBeenCalledWith(query, null, true, false, followLink('schema'));
+    });
+  });
+
+  describe('validate', () => {
+    it('should return an observable true and show no feedback if the current mdField exists in registry', (done) => {
+      component.mdField = 'dc.description.abstract';
+      component.validate().subscribe((result) => {
+        expect(result).toBeTrue();
+        fixture.detectChanges();
+        expect(fixture.debugElement.query(By.css('.invalid-feedback'))).toBeNull();
+        done();
+      });
+    });
+
+    it('should return an observable false and show invalid feedback if the current mdField is missing in registry', (done) => {
+      component.mdField = 'dc.fake.field';
+      component.validate().subscribe((result) => {
+        expect(result).toBeFalse();
+        fixture.detectChanges();
+        expect(fixture.debugElement.query(By.css('.invalid-feedback'))).toBeTruthy();
+        done();
+      });
+    });
+
+    describe('when querying the metadata fields returns an error response', () => {
+      beforeEach(() => {
+        (registryService.queryMetadataFields as jasmine.Spy).and.returnValue(createFailedRemoteDataObject$('Failed'));
+      });
+
+      it('should return an observable false and show a notification', (done) => {
+        component.mdField = 'dc.description.abstract';
+        component.validate().subscribe((result) => {
+          expect(result).toBeFalse();
+          expect(notificationsService.error).toHaveBeenCalled();
+          done();
+        });
+      });
+    });
+  });
+});

src/app/dso-shared/dso-edit-metadata/metadata-field-selector/metadata-field-selector.component.ts

@@ -0,0 +1,188 @@
+import {
+  AfterViewInit,
+  Component,
+  ElementRef,
+  EventEmitter,
+  Input,
+  OnDestroy,
+  OnInit,
+  Output,
+  ViewChild
+} from '@angular/core';
+import { switchMap, debounceTime, distinctUntilChanged, map, tap, take } from 'rxjs/operators';
+import { followLink } from '../../../shared/utils/follow-link-config.model';
+import {
+  getAllSucceededRemoteData, getFirstCompletedRemoteData,
+  metadataFieldsToString
+} from '../../../core/shared/operators';
+import { Observable } from 'rxjs/internal/Observable';
+import { RegistryService } from '../../../core/registry/registry.service';
+import { FormControl } from '@angular/forms';
+import { BehaviorSubject } from 'rxjs/internal/BehaviorSubject';
+import { hasValue } from '../../../shared/empty.util';
+import { Subscription } from 'rxjs/internal/Subscription';
+import { of } from 'rxjs/internal/observable/of';
+import { NotificationsService } from '../../../shared/notifications/notifications.service';
+import { TranslateService } from '@ngx-translate/core';
+
+@Component({
+  selector: 'ds-metadata-field-selector',
+  styleUrls: ['./metadata-field-selector.component.scss'],
+  templateUrl: './metadata-field-selector.component.html'
+})
+/**
+ * Component displaying a searchable input for metadata-fields
+ */
+export class MetadataFieldSelectorComponent implements OnInit, OnDestroy, AfterViewInit {
+  /**
+   * Type of the DSpaceObject
+   * Used to resolve i18n messages
+   */
+  @Input() dsoType: string;
+
+  /**
+   * The currently entered metadata field
+   */
+  @Input() mdField: string;
+
+  /**
+   * If true, the input will be automatically focussed upon when the component is first loaded
+   */
+  @Input() autofocus = false;
+
+  /**
+   * Emit any changes made to the metadata field
+   * This will only emit after a debounce takes place to avoid constant emits when the user is typing
+   */
+  @Output() mdFieldChange = new EventEmitter<string>();
+
+  /**
+   * Reference to the metadata-field's input
+   */
+  @ViewChild('mdFieldInput', { static: true }) mdFieldInput: ElementRef;
+
+  /**
+   * List of available metadata field options to choose from, dependent on the current query the user entered
+   * Shows up in a dropdown below the input
+   */
+  mdFieldOptions$: Observable<string[]>;
+
+  /**
+   * FormControl for the input
+   */
+  public input: FormControl = new FormControl();
+
+  /**
+   * The current query to update mdFieldOptions$ for
+   * This is controlled by a debounce, to avoid too many requests
+   */
+  query$: BehaviorSubject<string> = new BehaviorSubject<string>(null);
+
+  /**
+   * The amount of time to debounce the query for (in ms)
+   */
+  debounceTime = 300;
+
+  /**
+   * Whether or not the the user just selected a value
+   * This flag avoids the metadata field from updating twice, which would result in the dropdown opening again right after selecting a value
+   */
+  selectedValueLoading = false;
+
+  /**
+   * Whether or not to show the invalid feedback
+   * True when validate() is called and the mdField isn't present in the available metadata fields retrieved from the server
+   */
+  showInvalid = false;
+
+  /**
+   * Subscriptions to unsubscribe from on destroy
+   */
+  subs: Subscription[] = [];
+
+  constructor(protected registryService: RegistryService,
+              protected notificationsService: NotificationsService,
+              protected translate: TranslateService) {
+  }
+
+  /**
+   * Subscribe to any changes made to the input, with a debounce and fire a query, as well as emit the change from this component
+   * Update the mdFieldOptions$ depending on the query$ fired by querying the server
+   */
+  ngOnInit(): void {
+    this.subs.push(
+      this.input.valueChanges.pipe(
+        debounceTime(this.debounceTime),
+      ).subscribe((valueChange) => {
+        if (!this.selectedValueLoading) {
+          this.query$.next(valueChange);
+        }
+        this.selectedValueLoading = false;
+        this.mdField = valueChange;
+        this.mdFieldChange.emit(this.mdField);
+      }),
+    );
+    this.mdFieldOptions$ = this.query$.pipe(
+      distinctUntilChanged(),
+      switchMap((query: string) => {
+        this.showInvalid = false;
+        if (query !== null) {
+          return this.registryService.queryMetadataFields(query, null, true, false, followLink('schema')).pipe(
+            getAllSucceededRemoteData(),
+            metadataFieldsToString(),
+          );
+        } else {
+          return [[]];
+        }
+      }),
+    );
+  }
+
+  /**
+   * Focus the input if autofocus is enabled
+   */
+  ngAfterViewInit(): void {
+    if (this.autofocus) {
+      this.mdFieldInput.nativeElement.focus();
+    }
+  }
+
+  /**
+   * Validate the metadata field to check if it exists on the server and return an observable boolean for success/error
+   * Upon subscribing to the returned observable, the showInvalid flag is updated accordingly to show the feedback under the input
+   */
+  validate(): Observable<boolean> {
+    return this.registryService.queryMetadataFields(this.mdField, null, true, false, followLink('schema')).pipe(
+      getFirstCompletedRemoteData(),
+      switchMap((rd) => {
+        if (rd.hasSucceeded) {
+          return of(rd).pipe(
+            metadataFieldsToString(),
+            take(1),
+            map((fields: string[]) => fields.indexOf(this.mdField) > -1),
+            tap((exists: boolean) => this.showInvalid = !exists),
+          );
+        } else {
+          this.notificationsService.error(this.translate.instant(`${this.dsoType}.edit.metadata.metadatafield.error`), rd.errorMessage);
+          return [false];
+        }
+      }),
+    );
+  }
+
+  /**
+   * Select a metadata field from the dropdown options
+   * @param mdFieldOption
+   */
+  select(mdFieldOption: string): void {
+    this.selectedValueLoading = true;
+    this.input.setValue(mdFieldOption);
+  }
+
+  /**
+   * Unsubscribe from any open subscriptions
+   */
+  ngOnDestroy(): void {
+    this.subs.filter((sub: Subscription) => hasValue(sub)).forEach((sub: Subscription) => sub.unsubscribe());
+  }
+}

src/app/dso-shared/dso-edit-metadata/themed-dso-edit-metadata.component.ts

@@ -0,0 +1,33 @@
+import { ThemedComponent } from '../../shared/theme-support/themed.component';
+import { DsoEditMetadataComponent } from './dso-edit-metadata.component';
+import { Component, Input } from '@angular/core';
+import { DSpaceObject } from '../../core/shared/dspace-object.model';
+import { UpdateDataService } from '../../core/data/update-data.service';
+
+@Component({
+  selector: 'ds-themed-dso-edit-metadata',
+  styleUrls: [],
+  templateUrl: './../../shared/theme-support/themed.component.html',
+})
+export class ThemedDsoEditMetadataComponent extends ThemedComponent<DsoEditMetadataComponent> {
+
+  @Input() dso: DSpaceObject;
+
+  @Input() updateDataService: UpdateDataService<DSpaceObject>;
+
+  protected inAndOutputNames: (keyof DsoEditMetadataComponent & keyof this)[] = ['dso', 'updateDataService'];
+
+  protected getComponentName(): string {
+    return 'DsoEditMetadataComponent';
+  }
+
+  protected importThemedComponent(themeName: string): Promise<any> {
+    return import(`../../../themes/${themeName}/app/dso-shared/dso-edit-metadata/dso-edit-metadata.component`);
+  }
+
+  protected importUnthemedComponent(): Promise<any> {
+    return import(`./dso-edit-metadata.component`);
+  }
+
+
+}

src/app/dso-shared/dso-shared.module.ts

@@ -0,0 +1,36 @@
+import { NgModule } from '@angular/core';
+import { SharedModule } from '../shared/shared.module';
+import { DsoEditMetadataComponent } from './dso-edit-metadata/dso-edit-metadata.component';
+import { MetadataFieldSelectorComponent } from './dso-edit-metadata/metadata-field-selector/metadata-field-selector.component';
+import { DsoEditMetadataFieldValuesComponent } from './dso-edit-metadata/dso-edit-metadata-field-values/dso-edit-metadata-field-values.component';
+import { DsoEditMetadataValueComponent } from './dso-edit-metadata/dso-edit-metadata-value/dso-edit-metadata-value.component';
+import { DsoEditMetadataHeadersComponent } from './dso-edit-metadata/dso-edit-metadata-headers/dso-edit-metadata-headers.component';
+import { DsoEditMetadataValueHeadersComponent } from './dso-edit-metadata/dso-edit-metadata-value-headers/dso-edit-metadata-value-headers.component';
+import { ThemedDsoEditMetadataComponent } from './dso-edit-metadata/themed-dso-edit-metadata.component';
+
+@NgModule({
+  imports: [
+    SharedModule,
+  ],
+  declarations: [
+    DsoEditMetadataComponent,
+    ThemedDsoEditMetadataComponent,
+    MetadataFieldSelectorComponent,
+    DsoEditMetadataFieldValuesComponent,
+    DsoEditMetadataValueComponent,
+    DsoEditMetadataHeadersComponent,
+    DsoEditMetadataValueHeadersComponent,
+  ],
+  exports: [
+    DsoEditMetadataComponent,
+    ThemedDsoEditMetadataComponent,
+    MetadataFieldSelectorComponent,
+    DsoEditMetadataFieldValuesComponent,
+    DsoEditMetadataValueComponent,
+    DsoEditMetadataHeadersComponent,
+    DsoEditMetadataValueHeadersComponent,
+  ],
+})
+export class DsoSharedModule {
+
+}

src/app/entity-groups/journal-entities/item-pages/journal-issue/journal-issue.component.html

@@ -1,12 +1,8 @@
+<ds-themed-results-back-button *ngIf="showBackButton | async" [back]="back"></ds-themed-results-back-button>
 <div class="d-flex flex-row">
   <ds-item-page-title-field [item]="object" class="mr-auto">
   </ds-item-page-title-field>
-  <div class="pl-2 space-children-mr">
+  <ds-dso-edit-menu></ds-dso-edit-menu>
-    <ds-dso-page-version-button (newVersionEvent)="onCreateNewVersion()" [dso]="object"
-                                [tooltipMsgCreate]="'item.page.version.create'"
-                                [tooltipMsgHasDraft]="'item.page.version.hasDraft'"></ds-dso-page-version-button>
-    <ds-dso-page-edit-button [pageRoute]="itemPageRoute" [dso]="object" [tooltipMsg]="'journalissue.page.edit'"></ds-dso-page-edit-button>
-  </div>
 </div>
 <div class="row">
   <div class="col-xs-12 col-md-4">

src/app/entity-groups/journal-entities/item-pages/journal-issue/journal-issue.component.scss

@@ -1 +1,2 @@
 @import '../../../../../styles/variables.scss';
+

src/app/entity-groups/journal-entities/item-pages/journal-issue/journal-issue.component.ts

@@ -1,7 +1,7 @@
 import { Component } from '@angular/core';
 import { ViewMode } from '../../../../core/shared/view-mode.model';
 import { listableObjectComponent } from '../../../../shared/object-collection/shared/listable-object/listable-object.decorator';
-import { VersionedItemComponent } from '../../../../item-page/simple/item-types/versioned-item/versioned-item.component';
+import { ItemComponent } from '../../../../item-page/simple/item-types/shared/item.component';
 
 @listableObjectComponent('JournalIssue', ViewMode.StandalonePage)
 @Component({
@@ -12,5 +12,5 @@ import { VersionedItemComponent } from '../../../../item-page/simple/item-types/
 /**
  * The component for displaying metadata and relations of an item of the type Journal Issue
  */
-export class JournalIssueComponent extends VersionedItemComponent {
+export class JournalIssueComponent extends ItemComponent {
 }

src/app/entity-groups/journal-entities/item-pages/journal-volume/journal-volume.component.html

@@ -1,12 +1,8 @@
+<ds-themed-results-back-button *ngIf="showBackButton | async" [back]="back"></ds-themed-results-back-button>
 <div class="d-flex flex-row">
   <ds-item-page-title-field [item]="object" class="mr-auto">
   </ds-item-page-title-field>
-  <div class="pl-2 space-children-mr">
+  <ds-dso-edit-menu></ds-dso-edit-menu>
-    <ds-dso-page-version-button (newVersionEvent)="onCreateNewVersion()" [dso]="object"
-                                [tooltipMsgCreate]="'item.page.version.create'"
-                                [tooltipMsgHasDraft]="'item.page.version.hasDraft'"></ds-dso-page-version-button>
-    <ds-dso-page-edit-button [pageRoute]="itemPageRoute" [dso]="object" [tooltipMsg]="'journalvolume.page.edit'"></ds-dso-page-edit-button>
-  </div>
 </div>
 <div class="row">
   <div class="col-xs-12 col-md-4">

src/app/entity-groups/journal-entities/item-pages/journal-volume/journal-volume.component.ts

@@ -1,7 +1,7 @@
 import { Component } from '@angular/core';
 import { ViewMode } from '../../../../core/shared/view-mode.model';
 import { listableObjectComponent } from '../../../../shared/object-collection/shared/listable-object/listable-object.decorator';
-import { VersionedItemComponent } from '../../../../item-page/simple/item-types/versioned-item/versioned-item.component';
+import { ItemComponent } from '../../../../item-page/simple/item-types/shared/item.component';
 
 @listableObjectComponent('JournalVolume', ViewMode.StandalonePage)
 @Component({
@@ -12,5 +12,5 @@ import { VersionedItemComponent } from '../../../../item-page/simple/item-types/
 /**
  * The component for displaying metadata and relations of an item of the type Journal Volume
  */
-export class JournalVolumeComponent extends VersionedItemComponent {
+export class JournalVolumeComponent extends ItemComponent {
 }

src/app/entity-groups/journal-entities/item-pages/journal/journal.component.html

@@ -1,12 +1,8 @@
+<ds-themed-results-back-button *ngIf="showBackButton | async" [back]="back"></ds-themed-results-back-button>
 <div class="d-flex flex-row">
   <ds-item-page-title-field [item]="object" class="mr-auto">
   </ds-item-page-title-field>
-  <div class="pl-2 space-children-mr">
+  <ds-dso-edit-menu></ds-dso-edit-menu>
-    <ds-dso-page-version-button (newVersionEvent)="onCreateNewVersion()" [dso]="object"
-                                [tooltipMsgCreate]="'item.page.version.create'"
-                                [tooltipMsgHasDraft]="'item.page.version.hasDraft'"></ds-dso-page-version-button>
-    <ds-dso-page-edit-button [pageRoute]="itemPageRoute" [dso]="object" [tooltipMsg]="'journal.page.edit'"></ds-dso-page-edit-button>
-  </div>
 </div>
 <div class="row">
   <div class="col-xs-12 col-md-4">

src/app/entity-groups/journal-entities/item-pages/journal/journal.component.spec.ts

@@ -34,6 +34,11 @@ import { VersionHistoryDataService } from '../../../../core/data/version-history
 import { VersionDataService } from '../../../../core/data/version-data.service';
 import { WorkspaceitemDataService } from '../../../../core/submission/workspaceitem-data.service';
 import { SearchService } from '../../../../core/shared/search/search.service';
+import { mockRouteService } from '../../../../item-page/simple/item-types/shared/item.component.spec';
+import {
+  BrowseDefinitionDataServiceStub
+} from '../../../../shared/testing/browse-definition-data-service.stub';
+import { BrowseDefinitionDataService } from '../../../../core/browse/browse-definition-data.service';
 
 let comp: JournalComponent;
 let fixture: ComponentFixture<JournalComponent>;
@@ -99,7 +104,8 @@ describe('JournalComponent', () => {
         { provide: BitstreamDataService, useValue: mockBitstreamDataService },
         { provide: WorkspaceitemDataService, useValue: {} },
         { provide: SearchService, useValue: {} },
-        { provide: RouteService, useValue: {} }
+        { provide: RouteService, useValue: mockRouteService },
+        { provide: BrowseDefinitionDataService, useValue: BrowseDefinitionDataServiceStub }
       ],
 
       schemas: [NO_ERRORS_SCHEMA]

src/app/entity-groups/journal-entities/item-pages/journal/journal.component.ts

@@ -1,7 +1,7 @@
 import { Component } from '@angular/core';
 import { ViewMode } from '../../../../core/shared/view-mode.model';
 import { listableObjectComponent } from '../../../../shared/object-collection/shared/listable-object/listable-object.decorator';
-import { VersionedItemComponent } from '../../../../item-page/simple/item-types/versioned-item/versioned-item.component';
+import { ItemComponent } from '../../../../item-page/simple/item-types/shared/item.component';
 
 @listableObjectComponent('Journal', ViewMode.StandalonePage)
 @Component({
@@ -12,5 +12,5 @@ import { VersionedItemComponent } from '../../../../item-page/simple/item-types/
 /**
  * The component for displaying metadata and relations of an item of the type Journal
  */
-export class JournalComponent extends VersionedItemComponent {
+export class JournalComponent extends ItemComponent {
 }