68 lines
2.6 KiB
TypeScript
68 lines
2.6 KiB
TypeScript
import {Injectable} from '@angular/core';
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import {Http, Response} from '@angular/http';
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import {Observable} from 'rxjs/Observable';
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import {OpenaireProperties} from '../../../utils/properties/openaireProperties';
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import 'rxjs/add/observable/of';
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import 'rxjs/add/operator/do';
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import 'rxjs/add/operator/share';
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@Injectable()
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export class SearchCrossrefService {
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constructor( private http: Http ) {}
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searchCrossrefResults (term: string, size : number, page : number):any {
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let url = OpenaireProperties.getSearchCrossrefAPIURL()+'?query='+term+'&rows='+size+'&offset='+(size*(page-1));
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let key = url;
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return this.http.get(url)
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.map(request => <any> request.json().message)
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.do(items => console.log("Crossref Results: total results = "+items['total-results']+" keyword = "+term));
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//.catch(this.handleError);
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}
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searchCrossrefByDOIs(DOIs: string[]):any {
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/*
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$request ="http://api.crossref.org/works"."?filter=";
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foreach($dois as $doi){
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$request.="doi:".urlencode( trim($doi)).",";
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}
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*/
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var doisParams = "";
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for(var i =0 ;i < DOIs.length; i++){
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doisParams+=(doisParams.length > 0?",":"")+'doi:'+DOIs[i];
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}
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let url = OpenaireProperties.getSearchCrossrefAPIURL()+'?filter='+doisParams;
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let key = url;
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return this.http.get(url)
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.map(request => <any> request.json().message)
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.do(items => console.log("Crossref Results: total results = "+items['total-results']+" for doi = "+doisParams));
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//.catch(this.handleError);
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}
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searchCrossrefByMultipleDOIs(dois: string[]):any {
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let url = OpenaireProperties.getSearchCrossrefAPIURL()+'?filter=doi:';
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for(var i=0; i<dois.length; i++){
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url=url+(url.length==0?'':',')+'doi:'+dois[i];
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}
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url = OpenaireProperties.getSearchCrossrefAPIURL()+'?filter='+url;
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let key = url;
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return this.http.get(url)
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.map(request => <any> request.json().message)
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.do(items => console.log("Crossref Results: total results = "+items['total-results']));
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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 Observable.throw(error || 'Server error');
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}
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}
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