85 lines
3.2 KiB
TypeScript
85 lines
3.2 KiB
TypeScript
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import {throwError as observableThrowError, Observable} from 'rxjs';
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import {Injectable} from '@angular/core';
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import {Http, Response} from '@angular/http';
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import { HttpClient } from '@angular/common/http';
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import{EnvProperties} from '../../../utils/properties/env-properties';
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import { ClaimResult} from '../claimEntities.class';
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import {map} from "rxjs/operators";
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@Injectable()
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export class SearchDataciteService {
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constructor(private http: HttpClient ) {}
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searchDataciteResults (term: string, size : number, page : number, properties:EnvProperties, parse:boolean = false):any {
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//console.info("In search datacite results "+term+ " "+properties.searchDataciteAPIURL);
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let url = properties.searchDataciteAPIURL+'?query='+term+'&rows='+size+'&start='+(size*(page-1));
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let key = url;
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return this.http.get( ( properties.useCache)? (properties.cacheUrl+encodeURIComponent(url)): url)
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//.map(request => <any> request.json())
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.pipe(map(request => (parse?this.parse(request['data']):request)))
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//.catch(this.handleError);
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}
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getDataciteResultByDOI (doi: string, properties:EnvProperties, parse:boolean = false):any {
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let url = properties.searchDataciteAPIURL+'/'+doi;
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let key = url;
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return this.http.get( (properties.useCache)? (properties.cacheUrl+encodeURIComponent(url)): url)
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//.map(request => <any> request.json())
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.pipe(map(request => (parse?this.parse(request['data']):request)))
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// .do(items => console.log("Datacite Results: total results = "+items.meta.total+" doi = "+doi))
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//.catch(this.handleError);
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}
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private handleError (error: Response) {
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// in a real world app, we may send the error to some remote logging infrastructure
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// instead of just logging it to the console
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console.log(error);
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return observableThrowError(error || 'Server error');
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}
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private extractData(res: Response) {
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if (res.status < 200 || res.status >= 300) {
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throw new Error('Bad response status: ' + res.status);
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}
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let body = res.json();
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return body.data || { };
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}
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parse(response):ClaimResult[]{
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var results:ClaimResult[] = [];
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for(var i=0; i<response.length; i++){
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var item=response[i];
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var result:ClaimResult = new ClaimResult();
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result.publisher = null;
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result.journal = null;
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result.DOI = item.attributes.doi;
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result.id = item.attributes.doi;
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result.title = item.attributes.title;
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result.url = 'http://dx.doi.org/'+item.attributes.doi;
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result.source = 'datacite';
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result.type = 'dataset';
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result.date = item.attributes.published;
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result.accessRights = "OPEN";
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result.publisher =item.attributes['container-title']
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result.journal = null;
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result.result = item;
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if(item.attributes.author){
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for(var j=0; j<item.attributes.author.length; j++){
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var author = item.attributes.author[j];
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result.authors.push((author.family)?author.family+', '+author.given:author.literal);
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}
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}
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results.push(result);
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}
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return results;
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}
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}
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