fixed issue where resources that were fetched from a list where not able to be rendered separately

src/app/core/cache/builders/remote-data-build.service.ts

@@ -30,37 +30,33 @@ export class RemoteDataBuildService {
     href: string,
     normalizedType: GenericConstructor<TNormalized>
   ): RemoteData<TDomain> {
-    const requestObs = this.store.select<RequestEntry>('core', 'data', 'request', href);
-    const responseCacheObs = this.responseCache.get(href);
+    const requestHrefObs = this.objectCache.getRequestHrefBySelfLink(href);
 
-    const requestPending = requestObs.map((entry: RequestEntry) => hasValue(entry) && entry.requestPending).distinctUntilChanged();
+    const requestObs = Observable.race(
+      this.store.select<RequestEntry>('core', 'data', 'request', href).filter(entry => hasValue(entry)),
+      requestHrefObs.flatMap(requestHref =>
+        this.store.select<RequestEntry>('core', 'data', 'request', requestHref)).filter(entry => hasValue(entry))
+    );
 
-    const responsePending = requestObs.map((entry: RequestEntry) => hasValue(entry) && entry.responsePending).distinctUntilChanged();
+    const responseCacheObs = Observable.race(
+      this.responseCache.get(href).filter(entry => hasValue(entry)),
+      requestHrefObs.flatMap(requestHref => this.responseCache.get(requestHref)).filter(entry => hasValue(entry))
+    );
+
+    const requestPending = requestObs.map((entry: RequestEntry) => entry.requestPending).distinctUntilChanged();
+
+    const responsePending = requestObs.map((entry: RequestEntry) => entry.responsePending).distinctUntilChanged();
 
     const isSuccessFul = responseCacheObs
-      .map((entry: ResponseCacheEntry) => hasValue(entry) && entry.response.isSuccessful).distinctUntilChanged();
+      .map((entry: ResponseCacheEntry) => entry.response.isSuccessful).distinctUntilChanged();
 
     const errorMessage = responseCacheObs
-      .filter((entry: ResponseCacheEntry) => hasValue(entry) && !entry.response.isSuccessful)
+      .filter((entry: ResponseCacheEntry) => !entry.response.isSuccessful)
       .map((entry: ResponseCacheEntry) => (<ErrorResponse> entry.response).errorMessage)
       .distinctUntilChanged();
 
-    const payload =
-      Observable.race(
-        this.objectCache.getBySelfLink<TNormalized>(href, normalizedType),
-        responseCacheObs
-          .filter((entry: ResponseCacheEntry) => hasValue(entry) && entry.response.isSuccessful)
-          .map((entry: ResponseCacheEntry) => (<SuccessResponse> entry.response).resourceUUIDs)
-          .flatMap((resourceUUIDs: Array<string>) => {
-            if (isNotEmpty(resourceUUIDs)) {
-              return this.objectCache.get(resourceUUIDs[0], normalizedType);
-            }
-            else {
-              return Observable.of(undefined);
-            }
-          })
-          .distinctUntilChanged()
-      ).map((normalized: TNormalized) => {
+    const payload = this.objectCache.getBySelfLink<TNormalized>(href, normalizedType)
+      .map((normalized: TNormalized) => {
         return this.build<TNormalized, TDomain>(normalized);
       });
 
@@ -78,23 +74,24 @@ export class RemoteDataBuildService {
     href: string,
     normalizedType: GenericConstructor<TNormalized>
   ): RemoteData<TDomain[]> {
-    const requestObs = this.store.select<RequestEntry>('core', 'data', 'request', href);
-    const responseCacheObs = this.responseCache.get(href);
+    const requestObs = this.store.select<RequestEntry>('core', 'data', 'request', href)
+      .filter(entry => hasValue(entry));
+    const responseCacheObs = this.responseCache.get(href).filter(entry => hasValue(entry));
 
-    const requestPending = requestObs.map((entry: RequestEntry) => hasValue(entry) && entry.requestPending).distinctUntilChanged();
+    const requestPending = requestObs.map((entry: RequestEntry) => entry.requestPending).distinctUntilChanged();
 
-    const responsePending = requestObs.map((entry: RequestEntry) => hasValue(entry) && entry.responsePending).distinctUntilChanged();
+    const responsePending = requestObs.map((entry: RequestEntry) => entry.responsePending).distinctUntilChanged();
 
     const isSuccessFul = responseCacheObs
-      .map((entry: ResponseCacheEntry) => hasValue(entry) && entry.response.isSuccessful).distinctUntilChanged();
+      .map((entry: ResponseCacheEntry) => entry.response.isSuccessful).distinctUntilChanged();
 
     const errorMessage = responseCacheObs
-      .filter((entry: ResponseCacheEntry) => hasValue(entry) && !entry.response.isSuccessful)
+      .filter((entry: ResponseCacheEntry) => !entry.response.isSuccessful)
       .map((entry: ResponseCacheEntry) => (<ErrorResponse> entry.response).errorMessage)
       .distinctUntilChanged();
 
     const payload = responseCacheObs
-      .filter((entry: ResponseCacheEntry) => hasValue(entry) && entry.response.isSuccessful)
+      .filter((entry: ResponseCacheEntry) => entry.response.isSuccessful)
       .map((entry: ResponseCacheEntry) => (<SuccessResponse> entry.response).resourceUUIDs)
       .flatMap((resourceUUIDs: Array<string>) => {
         return this.objectCache.getList(resourceUUIDs, normalizedType)

src/app/core/cache/object-cache.actions.ts

@@ -20,6 +20,7 @@ export class AddToObjectCacheAction implements Action {
     objectToCache: CacheableObject;
     timeAdded: number;
     msToLive: number;
+    requestHref: string;
   };
 
   /**
@@ -31,9 +32,13 @@ export class AddToObjectCacheAction implements Action {
    *    the time it was added
    * @param msToLive
    *    the amount of milliseconds before it should expire
+   * @param requestHref
+   *    The href of the request that resulted in this object
+   *    This isn't necessarily the same as the object's self
+   *    link, it could have been part of a list for example
    */
-  constructor(objectToCache: CacheableObject, timeAdded: number, msToLive: number) {
-    this.payload = { objectToCache, timeAdded, msToLive };
+  constructor(objectToCache: CacheableObject, timeAdded: number, msToLive: number, requestHref: string) {
+    this.payload = { objectToCache, timeAdded, msToLive, requestHref };
   }
 }
 

src/app/core/cache/object-cache.reducer.spec.ts

@@ -24,7 +24,8 @@ describe("objectCacheReducer", () => {
         foo: "bar"
       },
       timeAdded: new Date().getTime(),
-      msToLive: 900000
+      msToLive: 900000,
+      requestHref: "https://rest.api/endpoint/uuid1"
     },
     [uuid2]: {
       data: {
@@ -32,7 +33,8 @@ describe("objectCacheReducer", () => {
         foo: "baz"
       },
       timeAdded: new Date().getTime(),
-      msToLive: 900000
+      msToLive: 900000,
+      requestHref: "https://rest.api/endpoint/uuid2"
     }
   };
   deepFreeze(testState);
@@ -56,7 +58,8 @@ describe("objectCacheReducer", () => {
     const objectToCache = {uuid: uuid1};
     const timeAdded = new Date().getTime();
     const msToLive = 900000;
-    const action = new AddToObjectCacheAction(objectToCache, timeAdded, msToLive);
+    const requestHref = "https://rest.api/endpoint/uuid1";
+    const action = new AddToObjectCacheAction(objectToCache, timeAdded, msToLive, requestHref);
     const newState = objectCacheReducer(state, action);
 
     expect(newState[uuid1].data).toEqual(objectToCache);
@@ -68,7 +71,8 @@ describe("objectCacheReducer", () => {
     const objectToCache = {uuid: uuid1, foo: "baz", somethingElse: true};
     const timeAdded = new Date().getTime();
     const msToLive = 900000;
-    const action = new AddToObjectCacheAction(objectToCache, timeAdded, msToLive);
+    const requestHref = "https://rest.api/endpoint/uuid1";
+    const action = new AddToObjectCacheAction(objectToCache, timeAdded, msToLive, requestHref);
     const newState = objectCacheReducer(testState, action);
 
     expect(newState[uuid1].data['foo']).toBe("baz");
@@ -80,7 +84,8 @@ describe("objectCacheReducer", () => {
     const objectToCache = {uuid: uuid1};
     const timeAdded = new Date().getTime();
     const msToLive = 900000;
-    const action = new AddToObjectCacheAction(objectToCache, timeAdded, msToLive);
+    const requestHref = "https://rest.api/endpoint/uuid1";
+    const action = new AddToObjectCacheAction(objectToCache, timeAdded, msToLive, requestHref);
     deepFreeze(state);
 
     objectCacheReducer(state, action);

src/app/core/cache/object-cache.reducer.ts

@@ -22,6 +22,7 @@ export class ObjectCacheEntry implements CacheEntry {
   data: CacheableObject;
   timeAdded: number;
   msToLive: number;
+  requestHref: string;
 }
 
 /**
@@ -83,7 +84,8 @@ function addToObjectCache(state: ObjectCacheState, action: AddToObjectCacheActio
     [action.payload.objectToCache.uuid]: {
       data: action.payload.objectToCache,
       timeAdded: action.payload.timeAdded,
-      msToLive: action.payload.msToLive
+      msToLive: action.payload.msToLive,
+      requestHref: action.payload.requestHref
     }
   });
 }

src/app/core/cache/object-cache.service.ts

@@ -22,9 +22,13 @@ export class ObjectCacheService {
    *    The object to add
    * @param msToLive
    *    The number of milliseconds it should be cached for
+   * @param requestHref
+   *    The href of the request that resulted in this object
+   *    This isn't necessarily the same as the object's self
+   *    link, it could have been part of a list for example
    */
-  add(objectToCache: CacheableObject, msToLive: number): void {
-    this.store.dispatch(new AddToObjectCacheAction(objectToCache, new Date().getTime(), msToLive));
+  add(objectToCache: CacheableObject, msToLive: number, requestHref: string): void {
+    this.store.dispatch(new AddToObjectCacheAction(objectToCache, new Date().getTime(), msToLive, requestHref));
   }
 
   /**
@@ -54,9 +58,7 @@ export class ObjectCacheService {
    *    An observable of the requested object
    */
   get<T extends CacheableObject>(uuid: string, type: GenericConstructor<T>): Observable<T> {
-    return this.store.select<ObjectCacheEntry>('core', 'cache', 'object', uuid)
-      .filter(entry => this.isValid(entry))
-      .distinctUntilChanged()
+    return this.getEntry(uuid)
       .map((entry: ObjectCacheEntry) => <T> Object.assign(new type(), entry.data));
   }
 
@@ -65,6 +67,23 @@ export class ObjectCacheService {
       .flatMap((uuid: string) => this.get(uuid, type))
   }
 
+  private getEntry(uuid: string): Observable<ObjectCacheEntry> {
+    return this.store.select<ObjectCacheEntry>('core', 'cache', 'object', uuid)
+      .filter(entry => this.isValid(entry))
+      .distinctUntilChanged();
+  }
+
+  getRequestHref(uuid: string): Observable<string> {
+    return this.getEntry(uuid)
+      .map((entry: ObjectCacheEntry) => entry.requestHref)
+      .distinctUntilChanged();
+  }
+
+  getRequestHrefBySelfLink(self: string): Observable<string> {
+    return this.store.select<string>('core', 'index', 'href', self)
+      .flatMap((uuid: string) => this.getRequestHref(uuid));
+  }
+
   /**
    * Get an observable for an array of objects of the same type
    * with the specified UUIDs

src/app/core/data/request.effects.ts

@@ -45,7 +45,7 @@ export class RequestEffects {
     })
     .flatMap((entry: RequestEntry) => {
       return this.restApi.get(entry.request.href)
-        .map((data: DSpaceRESTV2Response) => this.processEmbedded(data._embedded))
+        .map((data: DSpaceRESTV2Response) => this.processEmbedded(data._embedded, entry.request.href))
         .map((ids: Array<string>) => new SuccessResponse(ids))
         .do((response: Response) => this.responseCache.add(entry.request.href, response, this.EnvConfig.cache.msToLive))
         .map((response: Response) => new RequestCompleteAction(entry.request.href))
@@ -54,25 +54,25 @@ export class RequestEffects {
           .map((response: Response) => new RequestCompleteAction(entry.request.href)));
     });
 
-  protected processEmbedded(_embedded: any): Array<string> {
+  protected processEmbedded(_embedded: any, requestHref): Array<string> {
 
     if (isNotEmpty(_embedded)) {
       if (isObjectLevel(_embedded)) {
-        return this.deserializeAndCache(_embedded);
+        return this.deserializeAndCache(_embedded, requestHref);
       }
       else {
         let uuids = [];
         Object.keys(_embedded)
           .filter(property => _embedded.hasOwnProperty(property))
           .forEach(property => {
-            uuids = [...uuids, ...this.deserializeAndCache(_embedded[property])];
+            uuids = [...uuids, ...this.deserializeAndCache(_embedded[property], requestHref)];
           });
         return uuids;
       }
     }
   }
 
-  protected deserializeAndCache(obj): Array<string> {
+  protected deserializeAndCache(obj, requestHref): Array<string> {
     let type: ResourceType;
     const isArray = Array.isArray(obj);
 
@@ -96,19 +96,19 @@ export class RequestEffects {
         if (isArray) {
           obj.forEach(o => {
             if (isNotEmpty(o._embedded)) {
-              this.processEmbedded(o._embedded);
+              this.processEmbedded(o._embedded, requestHref);
             }
           });
           const normalizedObjArr = serializer.deserializeArray(obj);
-          normalizedObjArr.forEach(t => this.addToObjectCache(t));
+          normalizedObjArr.forEach(t => this.addToObjectCache(t, requestHref));
           return normalizedObjArr.map(t => t.uuid);
         }
         else {
           if (isNotEmpty(obj._embedded)) {
-            this.processEmbedded(obj._embedded);
+            this.processEmbedded(obj._embedded, requestHref);
           }
           const normalizedObj = serializer.deserialize(obj);
-          this.addToObjectCache(normalizedObj);
+          this.addToObjectCache(normalizedObj, requestHref);
           return [normalizedObj.uuid];
         }
 
@@ -125,10 +125,10 @@ export class RequestEffects {
     }
   }
 
-  protected addToObjectCache(co: CacheableObject): void {
+  protected addToObjectCache(co: CacheableObject, requestHref: string): void {
     if (hasNoValue(co) || hasNoValue(co.uuid)) {
       throw new Error('The server returned an invalid object');
     }
-    this.objectCache.add(co, this.EnvConfig.cache.msToLive);
+    this.objectCache.add(co, this.EnvConfig.cache.msToLive, requestHref);
   }
 }

src/app/core/data/request.service.ts

@@ -8,6 +8,9 @@ import { RequestConfigureAction, RequestExecuteAction } from "./request.actions"
 import { ResponseCacheService } from "../cache/response-cache.service";
 import { ObjectCacheService } from "../cache/object-cache.service";
 import { CacheableObject } from "../cache/object-cache.reducer";
+import { ResponseCacheEntry } from "../cache/response-cache.reducer";
+import { request } from "http";
+import { SuccessResponse } from "../cache/response-cache.models";
 
 @Injectable()
 export class RequestService {
@@ -35,7 +38,19 @@ export class RequestService {
   }
 
   configure<T extends CacheableObject>(request: Request<T>): void {
-    const isCached = this.objectCache.hasBySelfLink(request.href);
+    let isCached = this.objectCache.hasBySelfLink(request.href);
+
+    if (!isCached && this.responseCache.has(request.href)) {
+      //if it isn't cached it may be a list endpoint, if so verify
+      //every object included in the response is still cached
+      this.responseCache.get(request.href)
+        .take(1)
+        .filter((entry: ResponseCacheEntry) => entry.response.isSuccessful)
+        .map((entry: ResponseCacheEntry) => (<SuccessResponse> entry.response).resourceUUIDs)
+        .map((resourceUUIDs: Array<string>) => resourceUUIDs.every(uuid => this.objectCache.has(uuid)))
+        .subscribe(c => isCached = c);
+    }
+
     const isPending = this.isPending(request.href);
 
     if (!(isCached || isPending)) {

src/backend/communities.ts

@@ -35,7 +35,7 @@ export const COMMUNITIES = {
       ],
       "_links": {
         "self": {
-          "href": "http://dspace7.4science.it/dspace-spring-rest/api/core/community/9076bd16-e69a-48d6-9e41-0238cb40d863"
+          "href": "/communities/6631"
         },
         "collections": [
           { "href": "/collections/5179" }
@@ -78,7 +78,7 @@ export const COMMUNITIES = {
       ],
       "_links": {
         "self": {
-          "href": "http://dspace7.4science.it/dspace-spring-rest/api/core/community/9076bd16-e69a-48d6-9e41-0238cb40d863"
+          "href": "/communities/2365"
         },
         "collections": [
           { "href": "/collections/6547" }