74 lines
2.4 KiB
TypeScript
Executable File
74 lines
2.4 KiB
TypeScript
Executable File
import {Injectable} from '@angular/core';
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import {Content} from './content';
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import {HttpClient, HttpHeaders, HttpParams} from '@angular/common/http';
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import { Observable } from 'rxjs';
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import { map, catchError } from 'rxjs/operators';
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import {Util} from '../util';
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@Injectable()
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export class ContentsService {
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private util: Util = new Util();
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private userId = '';
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private backendServerAddress = '';
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private concepts = '';
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private getContentUrl = '/alreadyconcept';
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private uploadContentFileUrl = '/uploadcontentfile';
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private updateContentUrl = '/updateconcept';
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constructor(private http: HttpClient) {
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this.userId = this.util.getUserId();
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this.backendServerAddress = this.util.getBackendServerAddress();
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}
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getContent(): Observable<Content[]> {
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this.concepts = localStorage.getItem('concepts');
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return this.http.get<Content[]> (this.backendServerAddress + this.getContentUrl + `?user=${this.userId}&concepts=${this.concepts}`)
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.pipe(map((data: Content[]) => this.contentsJsonToArray(data['data'])))
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.pipe(catchError(this.util.handleError));
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}
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contentsJsonToArray(json): Content[] {
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const contentArray: Array<Content> = [];
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for (const key in json) {
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if (key) {
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const content = new Content();
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content.keyword = key;
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content.context = json[key];
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contentArray.push(content);
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}
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}
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return contentArray;
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}
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uploadFile(file: File): Observable<Content[]> {
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const formData: FormData = new FormData();
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formData.append('upload', file, file.name);
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formData.append('user', this.userId);
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const params = new HttpParams();
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const options = {
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headers: new HttpHeaders().set('Accept', 'application/json').delete('Content-Type'),
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params: params,
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reportProgress: true
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};
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return this.http.post(this.backendServerAddress + this.uploadContentFileUrl, formData, options)
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.pipe(map((data: Content[]) => this.contentsJsonToArray(data['data'])))
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.pipe(catchError(this.util.handleError));
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}
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updateContent(content: Array<Content>): Observable<any> {
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// transform data to json string
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const hashmap = {};
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content.forEach(function (element) {
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hashmap[element.keyword] = element.context;
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});
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return this.http.post(this.backendServerAddress + this.updateContentUrl, {user: this.userId, concepts: JSON.stringify(hashmap)})
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.pipe(map((data) => data['concepts']))
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.pipe(catchError(this.util.handleError));
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}
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}
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