D-Net

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

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

import {Observable}     from 'rxjs/Observable';

import {DatasetInfo} from '../../utils/entities/datasetInfo';

import 'rxjs/add/observable/of';

import 'rxjs/add/operator/do';

import 'rxjs/add/operator/share';

import{EnvProperties} from '../../utils/properties/env-properties';

import { ParsingFunctions } from '../landing-utils/parsingFunctions.class';

@Injectable()

export class DatasetService {

  constructor(private http: Http ) {

    this.parsingFunctions = new ParsingFunctions();

  }

  public parsingFunctions: ParsingFunctions;

  datasetInfo: DatasetInfo;

  getDatasetInfo (id: string, properties:EnvProperties):any {

    let url = properties.searchAPIURLLAst+'datasets/'+id+"?format=json";

    let key = url;

    return this.http.get((properties.useCache)? (properties.cacheUrl+encodeURIComponent(url)): url)

                    .map(res => <any> res.json())

                    .map(res => [res['result']['header']['dri:status'], res['result']['metadata']['oaf:entity']['oaf:result'],res])

                    .map(res => [res[1],  //0

                                 res[1]['title'],   //1

                                 res[1]['rels']['rel'], //2

                                 res[1]['children'],  //3

                                 res[1]['pid'], //4

                                 res[1]['subject'], //5

                                 res[1]['bestaccessright'], //6

                                 res[1]['collectedfrom'], //7

                                 res[1]['context'], //8

                                 //res[1]['resulttype'],

                                 res[0],  //9

                                 res[1]['creator'], //10

                                 res[1]['language'],  //11

                                 res[1]['country'], //12

                                 res[2], //13

                                 (res[1]['extraInfo']!= undefined && res[1]['extraInfo']['citations']!= undefined)? res[1]['extraInfo']['citations']['citation']:null //14

                    ]).map(res => this.parseDatasetInfo(res));

  }

  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 Observable.throw(error  || 'Server error');

  }

  parseDatasetInfo (data: any):any {

    this.datasetInfo = new DatasetInfo();

    this.datasetInfo.record = data[13];

    // ['result']['metadata']['oaf:entity']['oaf:result']

    if(data[0] != null) {

      var date:string = (data[0].dateofacceptance)+""; // transform to string in case it is an integer

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

      this.datasetInfo.dateofacceptance = data[0].dateofacceptance;

      this.datasetInfo.publisher = data[0].publisher;

      if(!Array.isArray(data[0].description)) {

        this.datasetInfo.description = data[0].description;

      } else {

        this.datasetInfo.description = data[0].description[0];

      }

      this.datasetInfo.embargoEndDate = data[0].embargoenddate;

    }

    /*this.datasetInfo.title = {"name": "", "url": "", "accessMode": ""};

    if(data[0]['bestaccessright'] && data[0]['bestaccessright'].hasOwnProperty("classid")) {

      this.datasetInfo.title.accessMode = data[0]['bestaccessright'].classid;

    }

    if(data[1] != null) {

      if(Array.isArray(data[1])) {

        this.datasetInfo.title['name'] = data[1][0].content;

      } else {

        this.datasetInfo.title['name'] = data[1].content;

      }

    }*/

    if(data[0]['bestaccessright'] && data[0]['bestaccessright'].hasOwnProperty("classid")) {

      this.datasetInfo.accessMode = data[0]['bestaccessright'].classid;

    }

    // ['result']['metadata']['oaf:entity']['oaf:result']['title']

    if(data[1] != null) {

      if(Array.isArray(data[1])) {

        this.datasetInfo.title = data[1][0].content;

        if(data[1][1].classid == "subtitle") {

          this.datasetInfo.subtitle = data[1][1].content;

        }

      } else {

        this.datasetInfo.title = data[1].content;

      }

    }

    // ['result']['metadata']['oaf:entity']['oaf:result']['rels']['rel']

    if(data[2] != null) {

      let relation;

      let length = data[2].length!=undefined ? data[2].length : 1;

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

        relation = data[2].length!=undefined ? data[2][i] : data[2];

        if(relation.hasOwnProperty("to")) {

          if(relation['to'].class == "isProducedBy") {

            this.datasetInfo.fundedByProjects = this.parsingFunctions.parseFundingByProjects(this.datasetInfo.fundedByProjects, relation, this.datasetInfo.projectsProvenanceVocabulary);

          } else if(relation['to'].class == "isRelatedTo") {

            let provenanceAction: string;

            if(relation.provenanceaction in this.datasetInfo.researchResultsProvenanceVocabulary) {

              provenanceAction = this.datasetInfo.researchResultsProvenanceVocabulary[relation.provenanceaction];

            } else {

              provenanceAction = "Other"

            }

            this.datasetInfo.relatedResearchResults = this.parsingFunctions.parseRelatedResearchResults(this.datasetInfo.relatedResearchResults, relation, provenanceAction);

          } else if(relation['to'].class == "hasAmongTopNSimilarDocuments") {

            this.datasetInfo.similarResearchResults = this.parsingFunctions.parseSimilarResearchResults(this.datasetInfo.similarResearchResults, relation);

          }

        }

      }

    }

    // ['result']['metadata']['oaf:entity']['oaf:result']['children']

    if(data[3] != null) {

      if(data[3].hasOwnProperty("instance")) {

        this.datasetInfo.hostedBy_collectedFrom = new Array<{ "downloadName": string, "downloadUrl": string[],

                                                              "collectedName": string, "collectedId": string,

                                                              "accessMode": string[], "bestAccessMode": string,

                                                              "type": string, "year":string}>();

        this.datasetInfo.types = new Array<string>();

        let types = new Set<string>();

        let counter = 0;

        let instance;

        let length = data[3]['instance'].length!=undefined ? data[3]['instance'].length : 1;

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

          instance = data[3]['instance'].length!=undefined ? data[3]['instance'][i] : data[3]['instance'];

          this.parsingFunctions.parseTypes(this.datasetInfo.types, types, instance);

          if(instance.hasOwnProperty("webresource")) {

            let url;

            if(instance['webresource'].length == undefined) {

              url = instance['webresource'].url;

            } else{

              url = instance['webresource'][0].url;

            }

            if(instance.hasOwnProperty("hostedby")) {

              counter = this.parsingFunctions.parseHostedBy_collectedFrom(this.datasetInfo.hostedBy_collectedFrom, instance, data[0], url, counter/*, this.datasetInfo.title*/, this.datasetInfo.accessMode);

            }

          }

        }

      }

    }

    // ['result']['metadata']['oaf:entity']['oaf:result']['pid']

    if(data[4] != null) {

      this.datasetInfo.identifiers = this.parsingFunctions.parseIdentifiers(data[4]);

    }

    // ['result']['metadata']['oaf:entity']['oaf:result']['subject']

    if(data[5] != null) {

      let subjectResults: [string[], Map<string, string[]>, Map<string, string[]>] = this.parsingFunctions.parseAllSubjects(data[5]);

      this.datasetInfo.subjects = subjectResults[0];

      this.datasetInfo.otherSubjects = subjectResults[1];

      this.datasetInfo.classifiedSubjects = subjectResults[2];

    }

    this.datasetInfo.hostedBy_collectedFrom = this.parsingFunctions.addPublisherToHostedBy_collectedFrom(

                this.datasetInfo.hostedBy_collectedFrom, this.datasetInfo.publisher,

                null, this.datasetInfo.identifiers/*, this.datasetInfo.title*/);

    // ['result']['metadata']['oaf:entity']['oaf:result']['context']

    if(data[8] != null) {

      this.datasetInfo.contexts = this.parsingFunctions.parseContexts(data[8]);

    }

    // if(data[9] != null && this.datasetInfo.type == undefined) {

    //   if(data[9].hasOwnProperty('classname')) {

    //     this.datasetInfo.type = data[9].classname;

    //   }

    // }

    // ['result']['header']['dri:status']

    if(data[9] != null && data[9] == "under curation") {

      this.datasetInfo.underCurationMessage = true;

    } else {

      this.datasetInfo.underCurationMessage = false;

    }

    // ['result']['metadata']['oaf:entity']['oaf:result']['creator']

    if(data[10] != null) {

      if(this.datasetInfo.authors == undefined) {

        this.datasetInfo.authors = new Array<string>();

      }

      let authors = data[10];

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

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

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

        this.datasetInfo.authors[author.rank] = author.content;

      }

      this.datasetInfo.authors = this.datasetInfo.authors.filter(function (item) {

        return (item != undefined);

      });

    }

    // ['result']['metadata']['oaf:entity']['oaf:result']['language']

    if(data[11] != null) {

      this.datasetInfo.languages = this.parsingFunctions.parseLanguages(data[11]);

    }

    // ['result']['metadata']['oaf:entity']['oaf:result']['country']

    if(data[12] != null) {

      this.datasetInfo.countries = this.parsingFunctions.parseCountries(data[12]);

    }

    // ['result']['metadata']['oaf:entity']['oaf:result']['extraInfo']['citations']['citation']

    if(data[14] != null) {

      this.datasetInfo.references = this.parsingFunctions.parseReferences(data[14]);

    }

    if(this.datasetInfo.relatedResearchResults) {

      let self = this;

      this.datasetInfo.relatedResearchResults.forEach(function (value, key, map) {

        self.datasetInfo.relatedResearchResults.set(key, self.parsingFunctions.sortByPercentage(value));

      });

    }

    this.datasetInfo.similarResearchResults = this.parsingFunctions.sortByPercentage(this.datasetInfo.similarResearchResults);

    return this.datasetInfo;

  }

}