45621: ngrx filter facets

resources/i18n/en.json

@@ -96,14 +96,18 @@
       "reset": "Reset filters",
       "facet-filter": {
         "show-more": "Show more",
+        "show-less": "Show less",
         "author": {
-          "placeholder": "Author name"
+          "placeholder": "Author name",
+          "head": "Author"
         },
         "scope": {
-          "placeholder": "Scope filter"
+          "placeholder": "Scope filter",
+          "head": "Scope"
         },
         "subject": {
-          "placeholder": "Subject"
+          "placeholder": "Subject",
+          "head": "Subject"
         }
       }
     }

src/app/+search-page/search-filters/search-filter/search-facet-filter/search-facet-filter.component.html

@@ -1,8 +1,15 @@
-<a *ngFor="let value of filterValues" class="d-block" [routerLink]="[getSearchLink()]" [queryParams]="getQueryParams(value) | async">
-    <input type="checkbox" [checked]="isChecked(value)"/>
-    <span class="filter-value">{{value.value}}</span>
-    <span class="filter-value-count float-right">({{value.count}})</span>
+<a *ngFor="let value of filterValues; let i=index" class="d-block" [routerLink]="[getSearchLink()]"
+   [queryParams]="getQueryParams(value)">
+    <ng-template [ngIf]="i < (facetCount | async)">
+        <input type="checkbox" [checked]="isChecked(value)"/>
+        <span class="filter-value">{{value.value}}</span>
+        <span class="filter-value-count float-right">({{value.count}})</span>
+    </ng-template>
 </a>
-<a href="">{{"search.filters.facet-filter.show-more" | translate}}</a>
+<a *ngIf="filterValues.length > (facetCount | async)" (click)="showMore()">{{"search.filters.facet-filter.show-more"
+    | translate}}</a>
+<a *ngIf="(currentPage | async) > 1" (click)="showLess()">{{"search.filters.facet-filter.show-less" |
+    translate}}</a>
 
-<input type="text" [placeholder]="'search.filters.facet-filter.' + filterConfig.name + '.placeholder'| translate"/>
+<input type="text"
+       [placeholder]="'search.filters.facet-filter.' + filterConfig.name + '.placeholder'| translate"/>

src/app/+search-page/search-filters/search-filter/search-facet-filter/search-facet-filter.component.ts

@@ -1,9 +1,10 @@
-import { Component, Input } from '@angular/core';
+import { Component, Input, OnInit } from '@angular/core';
 import { FacetValue } from '../../../search-service/facet-value.model';
 import { SearchFilterConfig } from '../../../search-service/search-filter-config.model';
 import { SearchService } from '../../../search-service/search.service';
-import { ActivatedRoute } from '@angular/router';
+import { Params } from '@angular/router';
 import { Observable } from 'rxjs/Observable';
+import { SearchFilterService } from '../search-filter.service';
 
 /**
  * This component renders a simple item page.
@@ -17,25 +18,48 @@ import { Observable } from 'rxjs/Observable';
   templateUrl: './search-facet-filter.component.html',
 })
 
-export class SidebarFacetFilterComponent {
+export class SidebarFacetFilterComponent implements OnInit {
   @Input() filterValues: FacetValue[];
   @Input() filterConfig: SearchFilterConfig;
+  currentPage: Observable<number>;
 
-  constructor(private searchService: SearchService, private route: ActivatedRoute) {
+  constructor(private filterService: SearchFilterService) {
+  }
+
+  ngOnInit(): void {
+    this.currentPage = this.filterService.getPage(this.filterConfig.name);
   }
 
   isChecked(value: FacetValue) {
-    return this.searchService.isFilterActive(this.filterConfig.name, value.value);
+    return this.filterService.isFilterActive(this.filterConfig.name, value.value);
   }
 
   getSearchLink() {
-    return this.searchService.getSearchLink();
+    return this.filterService.searchLink;
   }
 
-  getQueryParams(value: FacetValue): Observable<any> {
-    const params = {};
-    params[this.filterConfig.paramName] = value.value;
-    return this.route.queryParams.map((p) => Object.assign({}, p, params))
+  getQueryParams(value: FacetValue): Params {
+    return this.filterService.switchFilterInURL(this.filterConfig, value.value);
   }
 
+  get facetCount(): Observable<number> {
+    const resultCount = this.filterValues.length;
+    return this.currentPage.map((page: number) => {
+      const max = page * this.filterConfig.pageSize;
+      return max > resultCount ? resultCount : max;
+    });
+  }
+
+  showMore() {
+    this.filterService.increasePage(this.filterConfig.name);
+  }
+
+  showLess() {
+    this.filterService.decreasePage(this.filterConfig.name);
+  }
+
+  getCurrentPage(): Observable<number> {
+    return this.filterService.getPage(this.filterConfig.name);
+
+  }
 }

src/app/+search-page/search-filters/search-filter/search-filter.actions.ts

@@ -0,0 +1,58 @@
+import { Action } from '@ngrx/store';
+
+import { type } from '../../../shared/ngrx/type';
+
+/**
+ * For each action type in an action group, make a simple
+ * enum object for all of this group's action types.
+ *
+ * The 'type' utility function coerces strings into string
+ * literal types and runs a simple check to guarantee all
+ * action types in the application are unique.
+ */
+export const SearchFilterActionTypes = {
+  COLLAPSE: type('dspace/search-filter/COLLAPSE'),
+  INITIAL_COLLAPSE: type('dspace/search-filter/INITIAL_COLLAPSE'),
+  EXPAND: type('dspace/search-filter/EXPAND'),
+  INITIAL_EXPAND: type('dspace/search-filter/INITIAL_EXPAND'),
+  TOGGLE: type('dspace/search-filter/TOGGLE'),
+  DECREASE_PAGE: type('dspace/search-filter/DECREASE_PAGE'),
+  INCREASE_PAGE: type('dspace/search-filter/INCREASE_PAGE')
+};
+
+export class SearchFilterAction implements Action {
+  filterName: string;
+  type;
+  constructor(name: string) {
+    this.filterName = name;
+  }
+}
+
+/* tslint:disable:max-classes-per-file */
+export class SearchFilterCollapseAction extends SearchFilterAction {
+  type = SearchFilterActionTypes.COLLAPSE;
+}
+
+export class SearchFilterExpandAction extends SearchFilterAction {
+  type = SearchFilterActionTypes.EXPAND;
+}
+
+export class SearchFilterToggleAction extends SearchFilterAction {
+  type = SearchFilterActionTypes.TOGGLE;
+}
+
+export class SearchFilterInitialCollapseAction extends SearchFilterAction {
+  type = SearchFilterActionTypes.INITIAL_COLLAPSE;
+}
+
+export class SearchFilterInitialExpandAction extends SearchFilterAction {
+  type = SearchFilterActionTypes.INITIAL_EXPAND;
+}
+export class SearchFilterDecreasePageAction extends SearchFilterAction {
+  type = SearchFilterActionTypes.DECREASE_PAGE;
+}
+
+export class SearchFilterIncreasePageAction extends SearchFilterAction {
+  type = SearchFilterActionTypes.INCREASE_PAGE;
+}
+/* tslint:enable:max-classes-per-file */

src/app/+search-page/search-filters/search-filter/search-filter.component.html

@@ -1,4 +1,8 @@
 <div>
-    <div (click)="toggle()" class="filter-name">{{filter.name}} <span class="fa float-right" [ngClass]="isCollapsed ? 'fa-plus' : 'fa-minus'"></span></div>
-    <ds-search-facet-filter [filterConfig]="filter" [filterValues]="filterValues.payload | async"></ds-search-facet-filter>
+    <div (click)="toggle()" class="filter-name">{{filter.name}} <span class="fa float-right"
+                                                                      [ngClass]="(isCollapsed() | async) ? 'fa-plus' : 'fa-minus'"></span></div>
+    <div [@slide]="(isCollapsed() | async) ? 'collapsed' : 'expanded'" class="search-filter-wrapper">
+        <ds-search-facet-filter [filterConfig]="filter"
+                                [filterValues]="filterValues.payload | async"></ds-search-facet-filter>
+    </div>
 </div>

src/app/+search-page/search-filters/search-filter/search-filter.component.scss

@@ -1,2 +1,6 @@
 @import '../../../../styles/variables.scss';
-@import '../../../../styles/mixins.scss';
+@import '../../../../styles/mixins.scss';
+
+.search-filter-wrapper {
+    overflow: hidden;
+}

src/app/+search-page/search-filters/search-filter/search-filter.component.ts

@@ -3,6 +3,9 @@ import { SearchFilterConfig } from '../../search-service/search-filter-config.mo
 import { SearchService } from '../../search-service/search.service';
 import { RemoteData } from '../../../core/data/remote-data';
 import { FacetValue } from '../../search-service/facet-value.model';
+import { SearchFilterService } from './search-filter.service';
+import { Observable } from 'rxjs/Observable';
+import { slide } from '../../../shared/animations/slide';
 
 /**
  * This component renders a simple item page.
@@ -14,21 +17,38 @@ import { FacetValue } from '../../search-service/facet-value.model';
   selector: 'ds-search-filter',
   styleUrls: ['./search-filter.component.scss'],
   templateUrl: './search-filter.component.html',
+  animations: [slide]
 })
 
 export class SidebarFilterComponent implements OnInit {
   @Input() filter: SearchFilterConfig;
   filterValues: RemoteData<FacetValue[]>;
-  isCollapsed = false;
 
-  constructor(private searchService: SearchService) {
+  constructor(private searchService: SearchService, private filterService: SearchFilterService) {
   }
 
   ngOnInit() {
     this.filterValues = this.searchService.getFacetValuesFor(this.filter.name);
+    if (this.filter.isOpenByDefault) {
+      this.initialExpand();
+    } else {
+      this.initialCollapse();
+    }
   }
 
   toggle() {
-    this.isCollapsed = !this.isCollapsed;
+    this.filterService.toggle(this.filter.name);
   }
-}
+
+  isCollapsed(): Observable<boolean> {
+    return this.filterService.isCollapsed(this.filter.name);
+  }
+
+  initialCollapse() {
+    this.filterService.initialCollapse(this.filter.name);
+  }
+
+  initialExpand() {
+    this.filterService.initialExpand(this.filter.name);
+  }
+}

src/app/+search-page/search-filters/search-filter/search-filter.reducer.ts

@@ -0,0 +1,95 @@
+import { SearchFilterAction, SearchFilterActionTypes } from './search-filter.actions';
+import { isEmpty } from '../../../shared/empty.util';
+
+export interface SearchFilterState {
+  filterCollapsed: boolean,
+  page: number
+}
+
+export interface SearchFiltersState {
+  [name: string]: SearchFilterState
+}
+
+const initialState: SearchFiltersState = Object.create(null);
+
+export function filterReducer(state = initialState, action: SearchFilterAction): SearchFiltersState {
+
+  switch (action.type) {
+
+    case SearchFilterActionTypes.INITIAL_COLLAPSE: {
+      if (isEmpty(state) || isEmpty(state[action.filterName])) {
+        return Object.assign({}, state, {
+          [action.filterName]: {
+            filterCollapsed: true,
+            page: 1
+          }
+        });
+      }
+      return state;
+    }
+
+    case SearchFilterActionTypes.INITIAL_EXPAND: {
+      if (isEmpty(state) || isEmpty(state[action.filterName])) {
+        return Object.assign({}, state, {
+          [action.filterName]: {
+            filterCollapsed: false,
+            page: 1
+          }
+        });
+      }
+      return state;
+    }
+
+    case SearchFilterActionTypes.COLLAPSE: {
+      return Object.assign({}, state, {
+        [action.filterName]: {
+          filterCollapsed: true,
+          page: state[action.filterName].page
+        }
+      });
+    }
+
+    case SearchFilterActionTypes.EXPAND: {
+      return Object.assign({}, state, {
+        [action.filterName]: {
+          filterCollapsed: false,
+          page: state[action.filterName].page
+        }
+      });
+
+    }
+
+    case SearchFilterActionTypes.DECREASE_PAGE: {
+      return Object.assign({}, state, {
+        [action.filterName]: {
+          filterCollapsed: state[action.filterName].filterCollapsed,
+          page: state[action.filterName].page - 1
+        }
+      });
+    }
+
+    case SearchFilterActionTypes.INCREASE_PAGE: {
+      return Object.assign({}, state, {
+        [action.filterName]: {
+          filterCollapsed: state[action.filterName].filterCollapsed,
+          page: state[action.filterName].page + 1
+        }
+      });
+
+    }
+
+    case SearchFilterActionTypes.TOGGLE: {
+      return Object.assign({}, state, {
+        [action.filterName]: {
+          filterCollapsed: !state[action.filterName].filterCollapsed,
+          page: state[action.filterName].page
+        }
+      });
+
+    }
+
+    default: {
+      return state;
+    }
+  }
+}

src/app/+search-page/search-filters/search-filter/search-filter.service.ts

@@ -0,0 +1,136 @@
+import { Injectable, OnDestroy } from '@angular/core';
+import { SearchFiltersState, SearchFilterState } from './search-filter.reducer';
+import { createSelector, MemoizedSelector, Store } from '@ngrx/store';
+import { Observable } from 'rxjs/Observable';
+import { AppState } from '../../../app.reducer';
+import {
+  SearchFilterCollapseAction, SearchFilterDecreasePageAction, SearchFilterIncreasePageAction,
+  SearchFilterInitialCollapseAction,
+  SearchFilterInitialExpandAction,
+  SearchFilterToggleAction
+} from './search-filter.actions';
+import { hasValue, isNotEmpty } from '../../../shared/empty.util';
+import { ActivatedRoute, Params, Router } from '@angular/router';
+import { SearchFilterConfig } from '../../search-service/search-filter-config.model';
+import { RemoteData } from '../../../core/data/remote-data';
+import { PageInfo } from '../../../core/shared/page-info.model';
+import { FacetValue } from '../../search-service/facet-value.model';
+import { FilterType } from '../../search-service/filter-type.model';
+import { SearchService } from '../../search-service/search.service';
+
+const filterStateSelector = (state: SearchFiltersState) => state.searchFilter;
+
+@Injectable()
+export class SearchFilterService implements OnDestroy {
+  private sub;
+
+  constructor(private store: Store<SearchFiltersState>,
+              private route: ActivatedRoute,
+              private router: Router,
+              private searchService: SearchService) {
+  }
+
+  isFilterActive(filterName: string, filterValue: string): boolean {
+    let filterConfig: SearchFilterConfig;
+    this.sub = this.searchService.getConfig().payload
+      .subscribe((configuration) => filterConfig = configuration
+        .find((config: SearchFilterConfig) => config.name === filterName));
+    return isNotEmpty(this.route.snapshot.queryParams[filterConfig.paramName]) && [...this.route.snapshot.queryParams[filterConfig.paramName]].indexOf(filterValue, 0) > -1;
+  }
+
+  switchFilterInURL(filterConfig: SearchFilterConfig, value: string) {
+    console.log(this.route.snapshot.queryParams);
+    if (this.isFilterActive(filterConfig.name, value)) {
+      return this.removeQueryParameter(filterConfig.paramName, value);
+    } else {
+      return this.addQueryParameter(filterConfig.paramName, value);
+    }
+  }
+
+  addQueryParameter(paramName: string, value: string): Params {
+    const currentParams = this.route.snapshot.queryParams;
+    const newParam = {};
+    if ((currentParams[paramName])) {
+      newParam[paramName] = [...currentParams[paramName], value];
+    } else {
+      newParam[paramName] = [value];
+    }
+    return Object.assign({}, currentParams, newParam);
+  }
+
+  removeQueryParameter(paramName: string, value: string): Params {
+    const currentParams = this.route.snapshot.queryParams;
+    const newParam = {};
+    let currentFilterParams = [...currentParams[paramName]];
+    if (isNotEmpty(currentFilterParams)) {
+      const index = currentFilterParams.indexOf(value, 0);
+      if (index > -1) {
+        currentFilterParams = currentFilterParams.splice(index, 1);
+      }
+      newParam[paramName] = currentFilterParams;
+    }
+    return Object.assign({}, currentParams, newParam);
+  }
+
+  get searchLink() {
+    return this.searchService.searchLink;
+  }
+
+  isCollapsed(filterName: string): Observable<boolean> {
+    return this.store.select(filterByNameSelector(filterName))
+      .map((object: SearchFilterState) => object.filterCollapsed);
+  }
+
+  getPage(filterName: string): Observable<number> {
+    return this.store.select(filterByNameSelector(filterName))
+      .map((object: SearchFilterState) => object.page);
+  }
+
+  public collapse(filterName: string): void {
+    this.store.dispatch(new SearchFilterCollapseAction(filterName));
+  }
+
+  public expand(filterName: string): void {
+    this.store.dispatch(new SearchFilterCollapseAction(filterName));
+  }
+
+  public toggle(filterName: string): void {
+    this.store.dispatch(new SearchFilterToggleAction(filterName));
+  }
+
+  public initialCollapse(filterName: string): void {
+    this.store.dispatch(new SearchFilterInitialCollapseAction(filterName));
+  }
+
+  public initialExpand(filterName: string): void {
+    this.store.dispatch(new SearchFilterInitialExpandAction(filterName));
+  }
+
+  public decreasePage(filterName: string): void {
+    this.store.dispatch(new SearchFilterDecreasePageAction(filterName));
+  }
+
+  public increasePage(filterName: string): void {
+    this.store.dispatch(new SearchFilterIncreasePageAction(filterName));
+  }
+
+  ngOnDestroy(): void {
+    if (this.sub !== undefined) {
+      this.sub.unsubscribe();
+    }
+  }
+}
+
+function filterByNameSelector(name: string): MemoizedSelector<SearchFiltersState, SearchFilterState> {
+  return keySelector<SearchFilterState>(name);
+}
+
+export function keySelector<T>(key: string): MemoizedSelector<SearchFiltersState, T> {
+  return createSelector(filterStateSelector, (state: SearchFilterState) => {
+    if (hasValue(state)) {
+      return state[key];
+    } else {
+      return undefined;
+    }
+  });
+}

src/app/+search-page/search-page.component.html

@@ -13,7 +13,7 @@
             <div class="row">
                 <div id="search-body"
                      class="row-offcanvas row-offcanvas-left"
-                     [@slideInOut]="(isSidebarCollapsed() | async) ? 'collapsed' : 'expanded'">
+                     [@pushInOut]="(isSidebarCollapsed() | async) ? 'collapsed' : 'expanded'">
                     <ds-search-sidebar *ngIf="(isMobileView | async)" class="col-12"
                                        id="search-sidebar-xs"
                                        resultCount="{{(results.pageInfo | async)?.totalElements}}"

src/app/+search-page/search-page.component.ts

@@ -11,7 +11,7 @@ import { CommunityDataService } from '../core/data/community-data.service';
 import { isNotEmpty } from '../shared/empty.util';
 import { Community } from '../core/shared/community.model';
 import { Observable } from 'rxjs/Observable';
-import { slideInOut } from '../shared/animations/slide';
+import { pushInOut } from '../shared/animations/push';
 import { HostWindowService } from '../shared/host-window.service';
 import { SearchSidebarService } from './search-sidebar/search-sidebar.service';
 
@@ -25,7 +25,7 @@ import { SearchSidebarService } from './search-sidebar/search-sidebar.service';
   selector: 'ds-search-page',
   styleUrls: ['./search-page.component.scss'],
   templateUrl: './search-page.component.html',
-  animations: [slideInOut]
+  animations: [pushInOut]
 })
 export class SearchPageComponent implements OnInit, OnDestroy {
 

src/app/+search-page/search-page.module.ts

@@ -15,6 +15,7 @@ import { EffectsModule } from '@ngrx/effects';
 import { SidebarFiltersComponent } from './search-filters/search-filters.component';
 import { SidebarFilterComponent } from './search-filters/search-filter/search-filter.component';
 import { SidebarFacetFilterComponent } from './search-filters/search-filter/search-facet-filter/search-facet-filter.component';
+import { SearchFilterService } from './search-filters/search-filter/search-filter.service';
 
 const effects = [
   SearchSidebarEffects
@@ -40,7 +41,8 @@ const effects = [
   ],
   providers: [
     SearchService,
-    SearchSidebarService
+    SearchSidebarService,
+    SearchFilterService
   ],
   entryComponents: [
     ItemSearchResultListElementComponent,

src/app/+search-page/search-service/search-filter-config.model.ts

@@ -5,6 +5,7 @@ export class SearchFilterConfig {
   name: string;
   type: FilterType;
   hasFacets: boolean;
+  pageSize = 3;
   isOpenByDefault: boolean;
   /**
    * Name of this configuration that can be used in a url

src/app/+search-page/search-service/search.service.ts

@@ -235,11 +235,6 @@ export class SearchService implements OnDestroy {
     return params;
   }
 
-  isFilterActive(filterName: string, filterValue: string): boolean {
-    const filterConfig = this.config.find((config: SearchFilterConfig) => config.name === filterName);
-    return isNotEmpty(this.router.url.match(filterConfig.paramName + '=' + encodeURI(filterValue) + '(&(.*))?$'));
-  }
-
   getSearchLink() {
     return this.searchLink;
   }
@@ -249,5 +244,4 @@ export class SearchService implements OnDestroy {
       this.sub.unsubscribe();
     }
   }
-
 }

src/app/+search-page/search-sidebar/search-sidebar.effects.ts

@@ -2,7 +2,6 @@ import { Injectable } from '@angular/core';
 import { Effect, Actions } from '@ngrx/effects'
 import * as fromRouter from '@ngrx/router-store';
 
-import { HostWindowActionTypes } from '../../shared/host-window.actions';
 import { SearchSidebarCollapseAction } from './search-sidebar.actions';
 
 @Injectable()

src/app/app.reducer.ts

@@ -7,12 +7,17 @@ import {
   SearchSidebarState,
   sidebarReducer
 } from './+search-page/search-sidebar/search-sidebar.reducer';
+import {
+  filterReducer,
+  SearchFiltersState
+} from './+search-page/search-filters/search-filter/search-filter.reducer';
 
 export interface AppState {
   router: fromRouter.RouterReducerState;
   hostWindow: HostWindowState;
   header: HeaderState;
   searchSidebar: SearchSidebarState;
+  searchFilter: SearchFiltersState;
 }
 
 export const appReducers: ActionReducerMap<AppState> = {
@@ -20,4 +25,5 @@ export const appReducers: ActionReducerMap<AppState> = {
   hostWindow: hostWindowReducer,
   header: headerReducer,
   searchSidebar: sidebarReducer,
+  searchFilter: filterReducer
 };

src/app/shared/animations/push.ts

@@ -0,0 +1,16 @@
+import { animate, state, transition, trigger, style } from '@angular/animations';
+
+export const pushInOut = trigger('pushInOut', [
+
+  /*
+  state('expanded', style({ right: '100%' }));
+
+  state('collapsed', style({ right: 0 }));
+*/
+
+  state('expanded', style({ left: '100%' })),
+
+  state('collapsed', style({ left: 0 })),
+
+  transition('expanded <=> collapsed', animate(250)),
+]);

src/app/shared/animations/slide.ts

@@ -1,16 +1,10 @@
 import { animate, state, transition, trigger, style } from '@angular/animations';
 
-export const slideInOut = trigger('slideInOut', [
+export const slide = trigger('slide', [
 
-  /*
-  state('expanded', style({ right: '100%' }));
+  state('expanded', style({ height: '*' })),
 
-  state('collapsed', style({ right: 0 }));
-*/
-
-  state('expanded', style({ left: '100%' })),
-
-  state('collapsed', style({ left: 0 })),
+  state('collapsed', style({ height: 0 })),
 
   transition('expanded <=> collapsed', animate(250)),
 ]);