openaire-library/claims/claim-utils/service/searchDatacite.service.ts

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import {Observable, throwError as observableThrowError} from 'rxjs';
import {Injectable} from '@angular/core';
import {Response} from '@angular/http';
import {HttpClient} from '@angular/common/http';
import {EnvProperties} from '../../../utils/properties/env-properties';
import {ClaimEntity, ClaimResult} from '../claimHelper.class';
import {map} from "rxjs/operators";
import 'rxjs/add/operator/catch';
import 'rxjs/add/observable/of';
@Injectable()
export class SearchDataciteService {
constructor(private http: HttpClient ) {}
searchDataciteResults(term: string, size: number, page: number, properties: EnvProperties, parse: boolean = false): any {
//console.info("In search datacite results "+term+ " "+properties.searchDataciteAPIURL);
let url = properties.searchDataciteAPIURL + '?query=' + term + '&page[size]=' + size + '&page[number]=' + page;
let key = url;
return this.http.get((properties.useCache) ? (properties.cacheUrl + encodeURIComponent(url)) : url)
.pipe(map(request => [request["meta"]["total"], (parse ? SearchDataciteService.parse(request["data"]) : request)]));
//.catch(this.handleError);
}
getDataciteResultByDOI(doi: string, properties: EnvProperties, parse: boolean = false): any {
let url = properties.searchDataciteAPIURL + '/' + doi;
let key = url;
return this.http.get((properties.useCache) ? (properties.cacheUrl + encodeURIComponent(url)) : url)
.pipe(map(request => (parse ? SearchDataciteService.parse([request["data"]])[0] : request))).catch(e => Observable.of(null));
}
private handleError(error: Response) {
// in a real world app, we may send the error to some remote logging infrastructure
// instead of just logging it to the console
console.log(error);
return observableThrowError(error || 'Server error');
}
private extractData(res: Response) {
if (res.status < 200 || res.status >= 300) {
throw new Error('Bad response status: ' + res.status);
}
let body = res.json();
return body.data || {};
}
static parse(response): ClaimEntity[] {
const results: ClaimEntity[] = [];
console.log(response);
for (let i = 0; i < response.length; i++) {
const item = response[i];
const entity: ClaimEntity = new ClaimEntity();
entity.result = new ClaimResult();
entity.result.publisher = null;
entity.result.journal = null;
entity.result.DOI = item.attributes.doi;
entity.id = item.attributes.doi;
entity.title = item.attributes.title;
entity.result.url = 'http://dx.doi.org/' + item.attributes.doi;
entity.result.source = 'datacite';
entity.type = 'dataset';
entity.result.date = item.attributes.published;
entity.result.accessRights = "OPEN";
entity.result.publisher = item.attributes['container-title'];
entity.result.journal = null;
entity.result.record = item;
if (item.attributes.author) {
entity.result.authors = [];
for (let j = 0; j < item.attributes.author.length; j++) {
const author = item.attributes.author[j];
entity.result.authors.push((author.family) ? author.family + ', ' + author.given : author.literal);
}
}
results.push(entity);
}
return results;
}
}