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import {Injectable} from "@angular/core";
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import {HttpClient} from "@angular/common/http";
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import {Observable} from "rxjs";
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import {EnvProperties} from "../../utils/properties/env-properties";
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import {map} from "rxjs/operators";
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import {response} from "express";
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import {el} from "@angular/platform-browser/testing/src/browser_util";
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export interface Annotation {
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text: string;
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type: 'semantic' | 'keyword' | 'comment';
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urls?: string[];
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urlSize?: number;
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}
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@Injectable({
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providedIn: "root"
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})
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export class AnnotationService {
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constructor(private http: HttpClient) {
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}
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getAllAnnotations(properties: EnvProperties, source: string): Observable<Annotation[]> {
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let url = properties.b2noteAPIURL + 'annotations?type[]=semantic&type[]=keyword&type[]=comment&format=json-ld&download=false&target-source=' + encodeURIComponent(source);
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return this.http.get<Annotation[]>(url).pipe(map((response: any[]) => {
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return this.parseAnnotations(response);
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}));
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}
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private parseAnnotations(response: any[]): Annotation[] {
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let annotations: Annotation[] = [];
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if(response && response.length > 0) {
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response.forEach(value => {
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let body = value.body;
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if(body.type === 'TextualBody') {
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if(body.purpose === 'tagging') {
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annotations.push({
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text: body.value,
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type: "keyword"
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});
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} else {
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annotations.push({
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text: body.value,
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type: "comment"
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});
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}
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} else {
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let items = body.items;
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let urls: string[] = [];
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let text: string = null;
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items.forEach(item => {
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if(item.type === 'SpecificResource') {
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urls.push(item.source);
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} else if(item.type === 'TextualBody') {
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text = item.value;
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}
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});
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annotations.push({
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text: text,
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type: "semantic",
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urls: urls
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});
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}
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});
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}
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return annotations.sort((a, b) => {
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if(a.type === b.type) {
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return 0;
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} else if (a.type === 'semantic') {
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return -1;
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} else if(b.type === 'semantic') {
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return 1;
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} else if(a.type === 'keyword') {
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return -1;
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} else if(b.type === 'keyword') {
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return 1;
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}
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});
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}
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}
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