diff --git a/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.component.html b/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.component.html index 0f4b436cfb6..f8eb28fa731 100644 --- a/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.component.html +++ b/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.component.html @@ -117,3 +117,16 @@

+ + + diff --git a/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.component.ts b/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.component.ts index c13526f75dd..f684a1337d9 100644 --- a/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.component.ts +++ b/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.component.ts @@ -1,8 +1,8 @@ import { FlatTreeControl } from '@angular/cdk/tree'; import { Component, ElementRef, EventEmitter, Input, OnDestroy, OnInit, Output, OnChanges, SimpleChanges, ViewChild } from '@angular/core'; +import { Observable, Subscription, of } from 'rxjs'; import { map, tap, switchMap } from 'rxjs/operators'; -import { Observable, Subscription } from 'rxjs'; import { Store } from '@ngrx/store'; import { TranslateService } from '@ngx-translate/core'; @@ -116,6 +116,10 @@ export class VocabularyTreeviewComponent implements OnDestroy, OnInit, OnChanges readonly AlertType = AlertType; + public showNextPage$: Observable; + + public showPreviousPage$: Observable; + /** * Initialize instance variables * @@ -222,6 +226,12 @@ export class VocabularyTreeviewComponent implements OnDestroy, OnInit, OnChanges * Initialize the component, setting up the data to build the tree */ ngOnInit(): void { + + // Initialize observables to false when component loads + // Ensures pagination buttons are hidden on first load or after navigation + this.showNextPage$ = of(false); + this.showPreviousPage$ = of(false); + this.subs.push( this.vocabularyService.findVocabularyById(this.vocabularyOptions.name).pipe( // Retrieve the configured preloadLevel from REST @@ -289,6 +299,17 @@ export class VocabularyTreeviewComponent implements OnDestroy, OnInit, OnChanges * Search for a vocabulary entry by query */ search() { + + // Reassign observables after performing each new search + // Updates pagination button visibility based on available pages + this.showNextPage$ = this.vocabularyTreeviewService.showNextPageSubject + ? this.vocabularyTreeviewService.showNextPageSubject.asObservable() + : of(false); + + this.showPreviousPage$ = this.vocabularyTreeviewService.showPreviousPageSubject + ? this.vocabularyTreeviewService.showPreviousPageSubject.asObservable() + : of(false); + if (isNotEmpty(this.searchText)) { if (isEmpty(this.storedNodeMap)) { this.storedNodeMap = this.nodeMap; @@ -298,6 +319,28 @@ export class VocabularyTreeviewComponent implements OnDestroy, OnInit, OnChanges } } + /** + * Loads the next page of vocabulary search results. + * Increments the current page in the service and re-triggers the query with the same search term and selection. + */ + loadNextPage(selectedItems: string[]) { + const svc = this.vocabularyTreeviewService; + if (svc.currentPage < svc.totalPages) { + svc.searchByQueryAndPage(svc.queryInProgress, selectedItems, svc.currentPage + 1); + } + } + + /** + * Loads the previous page of vocabulary search results. + * Decrements the current page in the service and re-triggers the query with the same search term and selection. + */ + loadPreviousPage(selectedItems: string[]) { + const svc = this.vocabularyTreeviewService; + if (svc.currentPage > 1) { + svc.searchByQueryAndPage(svc.queryInProgress, selectedItems, svc.currentPage - 1); + } + } + /** * Check if search box contains any text */ @@ -328,6 +371,9 @@ export class VocabularyTreeviewComponent implements OnDestroy, OnInit, OnChanges if (this.searchInput) { this.searchInput.nativeElement.focus(); } + + this.showNextPage$ = of(false); + this.showPreviousPage$ = of(false); } add() { diff --git a/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.service.ts b/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.service.ts index f524af4c0e2..e11ce4da0d0 100644 --- a/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.service.ts +++ b/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.service.ts @@ -1,7 +1,7 @@ import { Injectable } from '@angular/core'; import { BehaviorSubject, Observable, of as observableOf } from 'rxjs'; -import { map, merge, mergeMap, scan } from 'rxjs/operators'; +import { map, merge, mergeMap, scan, tap } from 'rxjs/operators'; import findIndex from 'lodash/findIndex'; import { @@ -17,10 +17,11 @@ import { isEmpty, isNotEmpty } from '../../empty.util'; import { VocabularyOptions } from '../../../core/submission/vocabularies/models/vocabulary-options.model'; import { getFirstSucceededRemoteDataPayload, - getFirstSucceededRemoteListPayload + getFirstSucceededRemoteListPayload, getFirstSucceededRemoteData } from '../../../core/shared/operators'; import { PaginatedList } from '../../../core/data/paginated-list.model'; import { VocabularyEntryDetail } from '../../../core/submission/vocabularies/models/vocabulary-entry-detail.model'; +import { RemoteData } from '../../../core/data/remote-data'; /** * A service that provides methods to deal with vocabulary tree @@ -79,6 +80,12 @@ export class VocabularyTreeviewService { */ private hideSearchingWhenUnsubscribed$ = new Observable(() => () => this.loading.next(false)); + public currentPage = 1; + public totalPages = 1; + public queryInProgress = ''; + public showNextPageSubject = new BehaviorSubject(false); + public showPreviousPageSubject = new BehaviorSubject(false); + /** * Initialize instance variables * @@ -186,10 +193,28 @@ export class VocabularyTreeviewService { } /** - * Perform a search operation by query + * Initiates a vocabulary search using the provided query term and selection, starting from the first page. + * + * @param query - The text input to search for within the vocabulary. + * @param selectedItems - Currently selected vocabulary item IDs to retain in the result. */ searchByQuery(query: string, selectedItems: string[]) { + this.searchByQueryAndPage(query, selectedItems, 1); + } + + /** + * Executes a paginated vocabulary search with the given query, selection, and page number. + * Updates pagination state, loading indicators, and triggers the vocabulary tree rebuild. + * + * @param query - The search term to filter vocabulary entries. + * @param selectedItems - IDs of items currently selected in the tree. + * @param page - The page number to fetch (1-based index). + */ + searchByQueryAndPage(query: string, selectedItems: string[], page: number = 1) { this.loading.next(true); + this.queryInProgress = query; + this.currentPage = page; + if (isEmpty(this.storedNodes)) { this.storedNodes = this.dataChange.value; this.storedNodeMap = this.nodeMap; @@ -197,9 +222,22 @@ export class VocabularyTreeviewService { this.nodeMap = new Map(); this.dataChange.next([]); - this.vocabularyService.getVocabularyEntriesByValue(query, false, this.vocabularyOptions, new PageInfo()).pipe( + const pageInfo = new PageInfo({ + elementsPerPage: 20, + currentPage: page, + totalElements: 0, + totalPages: 0 + }); + + this.vocabularyService.getVocabularyEntriesByValue(query, false, this.vocabularyOptions, pageInfo).pipe( + getFirstSucceededRemoteData(), + tap((rd: RemoteData>) => { + this.totalPages = rd.payload.pageInfo.totalPages; + this.showPreviousPageSubject.next(rd.payload.pageInfo.currentPage > 1); + this.showNextPageSubject.next(rd.payload.pageInfo.currentPage < this.totalPages); + }), getFirstSucceededRemoteListPayload(), - mergeMap((result: VocabularyEntry[]) => (result.length > 0) ? result : observableOf(null)), + mergeMap((result: VocabularyEntry[]) => result.length > 0 ? result : observableOf(null)), mergeMap((entry: VocabularyEntry) => this.vocabularyService.findEntryDetailById(entry.otherInformation.id, this.vocabularyName).pipe( getFirstSucceededRemoteDataPayload() diff --git a/src/assets/i18n/en.json5 b/src/assets/i18n/en.json5 index 6ffe822b120..d2ba42e6c81 100644 --- a/src/assets/i18n/en.json5 +++ b/src/assets/i18n/en.json5 @@ -887,6 +887,10 @@ "browse.taxonomy.button": "Browse", + "browse.taxonomy.show_next_results": "Show next results", + + "browse.taxonomy.show_previous_results": "Show previous results", + "browse.title": "Browsing {{ collection }} by {{ field }}{{ startsWith }} {{ value }}", "browse.title.page": "Browsing {{ collection }} by {{ field }} {{ value }}",