D-Net

import { Injectable } from '@angular/core';

import { Http, Response, Headers, RequestOptions } from '@angular/http';

import { Observable } from 'rxjs/Rx';

import { ResultInfo } from '../openaireLibrary/connect/results/resultInfo';

import { CommunityInfo } from '../openaireLibrary/connect/community/communityInfo';

@Injectable()

export class SearchEntriesService {

  private sizeOfDescription: number = 135;

  constructor(private http:Http) {

    }

  getTotal(url: string) {

      return this.http.get(url).map(res => <any> res.json()).map(res => res.total);

      //.do(res => {console.log(res)});

  }

  countTotal(url:string) {

      return this.http.get(url).map(res => <any> res.json()).map(res => res.length);

  }

  getResults(url: string) {

      return this.http.get(url).map(res => <any> res.json()).map(res => this.parseResults(res['results']));

  }

  parseResults(data: any): ResultInfo[] {

      let results: ResultInfo[] = [];

      let length = Array.isArray(data) ? data.length :1;

      for (let i=0; i<length; i++) {

          let resData = Array.isArray(data) ? data[i]['result']['metadata']['oaf:entity']['oaf:result'] : data['result']['metadata']['oaf:entity']['oaf:result'];

          var result: ResultInfo = new ResultInfo();

          if(Array.isArray(resData['title'])) {

              result['title'] = resData['title'][0].content;

          } else {

              result['title'] = resData['title'].content;

          }

          result['id'] = Array.isArray(data) ? data[i]['result']['header']['dri:objIdentifier'] : data['result']['header']['dri:objIdentifier'];

          if(resData['bestaccessright'] && resData['bestaccessright'].hasOwnProperty("classid")) {

              result['accessRights'] = resData['bestaccessright'].classid;

          }

          if(resData['resulttype'].hasOwnProperty("classid")) {

              result['type'] = resData['resulttype'].classid;

          }

          if(resData.hasOwnProperty("creator") && resData['creator'] != null) {

              if(result['authors'] == undefined) {

                result['authors'] = new Array<string>();

              }

              let authors = resData['creator'];

              let length = Array.isArray(authors) ? authors.length : 1;

              for(let i=0; i<length; i++) {

                let author = Array.isArray(authors) ? authors[i] : authors;

                result.authors[author.rank-1] = author.content;

              }

              result.authors = result.authors.filter(function (item) {

                return (item != undefined);

              });

          }

          var date:string = (resData.dateofacceptance)+""; // transform to string in case it is an integer

          result.year = (date && (date).indexOf('-') !== -1)?date.split('-')[0]:date;

          if(!Array.isArray(resData.description)) {

              result.description = resData.description;

          } else {

              result.description = resData.description[0];

          }

          if(result.description.length > this.sizeOfDescription) {

            result.description = result.description.substring(0, this.sizeOfDescription) + "...";

          }

          results.push(result);

      }

      return results;

  }

}