D-Net

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

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

import {Observable}     from 'rxjs/Observable';

import {OpenaireProperties} from '../utils/properties/openaireProperties';

import {SearchResult}     from '../utils/entities/searchResult';

import {RefineResultsUtils} from './servicesUtils/refineResults.class';

import 'rxjs/add/observable/of';

import 'rxjs/add/operator/do';

import 'rxjs/add/operator/share';

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

@Injectable()

export class SearchDatasetsService {

    private sizeOfDescription: number = 270;

    public parsingFunctions: ParsingFunctions = new ParsingFunctions();

    constructor(private http: Http ) {}

    searchDatasets (params: string, refineParams:string, page: number, size: number, refineFields:string[] ):any {

        let link = OpenaireProperties.getSearchAPIURLLast()+"datasets";

        let url = link+"?";

        if(params!= null && params != ''  ) {

            url += params;

        }

        if(refineParams!= null && refineParams != ''  ) {

            url += refineParams;

        }

        url += "&page="+ (page-1) +"&size="+size+"&format=json";

        return this.http.get((OpenaireProperties.isCacheEnabled())? (OpenaireProperties.getCacheUrl()+encodeURIComponent(url)): url)

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

                    //.do(res => console.info(res))

                    .map(res => [res['meta'].total, this.parseResults(res['results']),RefineResultsUtils.parse(res['refineResults'],refineFields, "dataset")]);

    }

    searchDatasetById (id: string ):any {

        let url = OpenaireProperties.getSearchAPIURLLast()+"datasets/"+id+"?format=json";

         return this.http.get((OpenaireProperties.isCacheEnabled())? (OpenaireProperties.getCacheUrl()+encodeURIComponent(url)): url)

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

                    .map(res => this.parseResults(res));

    }

    searchAggregators (id: string, params: string, refineParams:string, page: number, size: number ):any {

        let link = OpenaireProperties.getSearchAPIURLLast()+"datasets";

        let url = link+"?"+"&format=json";

        if(params!= null && params != ''  ) {

            url += params;

        }

        if(refineParams!= null && refineParams != ''  ) {

            url += refineParams;

        }

        url += "&page="+(page-1)+"&size="+size;

        return this.http.get((OpenaireProperties.isCacheEnabled())? (OpenaireProperties.getCacheUrl()+encodeURIComponent(url)): url)

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

                    .map(res => this.parseRefineResults(id, res['refineResults']))

    }

    searchDatasetsByDois (DOIs: string[], refineParams:string, page: number, size: number, refineFields:string[] ):any {

        let link = OpenaireProperties.getSearchAPIURLLast()+"datasets";

        let url = link+"?";

        var doisParams = "";

        for(var i =0 ;i < DOIs.length; i++){

          doisParams+=(doisParams.length > 0?"&":"")+'doi="'+ DOIs[i]+'"';

        }

        if(doisParams.length > 0){

          url += "&"+doisParams;

        }

        if(refineParams!= null && refineParams != ''  ) {

            url += refineParams;

        }

        url += "&page="+ (page-1) +"&size="+size+"&format=json";

        return this.http.get((OpenaireProperties.isCacheEnabled())? (OpenaireProperties.getCacheUrl()+encodeURIComponent(url)): url)

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

                    //.do(res => console.info(res))

                    .map(res => [res['meta'].total, this.parseResults(res['results']),RefineResultsUtils.parse(res['refineResults'],refineFields, "dataset")]);

    }

    advancedSearchDatasets (params: string, page: number, size: number ):any {

      let url = OpenaireProperties.getSearchResourcesAPIURL();

      var basicQuery = "(oaftype exact result) and (resulttypeid exact dataset)  "

      url += "?query=";

      if(params!= null && params != ''  ) {

        url +=" ( "+basicQuery+ " ) " +" and (" + params + ")";

      }else{

        url +=" ( "+basicQuery+ " ) ";

      }

      url += "&page="+(page-1)+"&size="+size;

      url += "&format=json";

      return this.http.get((OpenaireProperties.isCacheEnabled())? (OpenaireProperties.getCacheUrl()+encodeURIComponent(url)): url)

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

      //.do(res => console.info(res))

      .map(res => [res['meta'].total, this.parseResults(res['results'])]);

    }

    searchDatasetsForEntity (params: string, page: number, size: number):any {

        let link = OpenaireProperties.getSearchAPIURLLast();

        let url = link+params+"/datasets"+"?format=json";

        return this.http.get((OpenaireProperties.isCacheEnabled())? (OpenaireProperties.getCacheUrl()+encodeURIComponent(url)): url)

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

                    .map(res => [res['meta'].total, this.parseResults(res['results'])]);

    }

    searchDatasetsForDataproviders(params: string, page: number, size: number):any {

        let link = OpenaireProperties.getSearchAPIURLLast();

        let url = link+params+ "&page="+(page-1)+"&size="+size + "&format=json";

        return this.http.get((OpenaireProperties.isCacheEnabled())? (OpenaireProperties.getCacheUrl()+encodeURIComponent(url)): url)

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

                    .map(res => [res['meta'].total, this.parseResults(res['results'])]);

    }

    parseResults(data: any): SearchResult[] {

        let results: SearchResult[] = [];

        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: SearchResult = new SearchResult();

            result.entityType = "dataset";

            if(resData['language'] && resData['language'] != null) {

              result.languages = new Array<string>();

              result.types = new Array<string>();

              let types = new Set<string>();

              let counter = 0;

              let instance;

              let length = Array.isArray(resData['children']['instance']) ? resData['children']['instance'].length : 1;

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

                instance = Array.isArray(resData['children']['instance']) ? resData['children']['instance'][i] : resData['children']['instance'];

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

              }

              if(!Array.isArray(resData['language'])) {

                if(resData['language'].classname != "Undetermined" && resData['language'].classname) {

                  result.languages.push(resData['language'].classname);

                }

              } else {

                for(let i=0; i<resData['language'].length; i++) {

                  if(resData['language'][i].classname != "Undetermined" && resData['language'][i].classname) {

                    result.languages.push(resData['language'][i].classname);

                  }

                }

              }

            }

            result['title'] = {"name": '', "accessMode": '', "sc39": ''};

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

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

            } else {

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

            }

            //result['title'].url = OpenaireProperties.getsearchLinkToDataset();

            //result['title'].url += Array.isArray(data) ? data[i]['result']['header']['dri:objIdentifier'] : data['result']['header']['dri:objIdentifier'];

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

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

                result['title'].accessMode = resData['bestaccessright'].classid;

            }

            if(resData['rels'].hasOwnProperty("rel")) {

                let relLength = Array.isArray(resData['rels']['rel']) ? resData['rels']['rel'].length : 1;

                for(let j=0; j<relLength; j++) {

                    let relation = Array.isArray(resData['rels']['rel']) ? resData['rels']['rel'][j] : resData['rels']['rel'];

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

                        /*if(relation['to'].class == "hasAuthor") {

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

                            result['authors'] = new Array<{"name": string, "id": string}>();

                          }

                          result['authors'].push({"name": relation.fullname, "id": relation['to'].content});

                        } else */if(relation['to'].class == "isProducedBy") {

                          result['projects'] = this.parseProjects(result['projects'], relation);

                        }

                    }

                }

            }

            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)+"...";

            }

            result.embargoEndDate = resData.embargoenddate;

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

                result.publisher = resData.publisher;

            } else {

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

                    if(result.publisher != undefined){

                        result.publisher += ', '+resData['publisher'][i];

                    } else {

                        result.publisher = resData['publisher'][i];

                    }

                }

            }

            results.push(result);

        }

        return results;

    }

    parseProjects(projects: { "id": string, "acronym": string, "title": string,

                              "funderShortname": string, "funderName": string,

                              "code": string }[], relation: any ) :  {

                              "id": string, "acronym": string, "title": string,

                              "funderShortname": string, "funderName": string,

                              "code": string }[] {

      if(projects == undefined) {

          projects = new Array<

              { "id": string, "acronym": string, "title": string,

                "funderShortname": string, "funderName": string,

                "code": string

              }>();

      }

      let countProjects = projects.length;

      projects[countProjects] = {

          "id": "", "acronym": "", "title": "",

          "funderShortname": "", "funderName": "",

          "code": ""

      }

      if(relation.title != 'unidentified') {

          projects[countProjects]['id'] =

              /*OpenaireProperties.getsearchLinkToProject() + */relation['to'].content;

          projects[countProjects]['acronym'] = relation.acronym;

          projects[countProjects]['title'] = relation.title;

          projects[countProjects]['code'] = relation.code;

      } else {

          projects[countProjects]['id'] = "";

          projects[countProjects]['acronym'] = "";

          projects[countProjects]['title'] = "";

          projects[countProjects]['code'] = "";

      }

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

          let fundingLength = Array.isArray(relation['funding']) ? relation['funding'].length : 1;

          for(let z=0; z<fundingLength; z++) {

              let fundingData = Array.isArray(relation['funding']) ? relation['funding'][z] : relation['funding'];

              if(fundingData.hasOwnProperty("funder")) {

                  projects[countProjects]['funderShortname'] = fundingData['funder'].shortname;

                  projects[countProjects]['funderName'] = fundingData['funder'].name;

              }

          }

      }

      return projects;

    }

    parseRefineResults(id: string, data: any): any {

        var results:any = [];

        if(data.hasOwnProperty("resulthostingdatasource")) {

            let length = Array.isArray(data['resulthostingdatasource']) ? data['resulthostingdatasource'].length : 1;

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

                let datasource = Array.isArray(data['resulthostingdatasource']) ? data['resulthostingdatasource'][i] : data['resulthostingdatasource'];

                let result: {"name": string, "id": string, "count": number} = {"name": "", "id": "", "count": 0};

                result['name'] = datasource.name;

                result['id'] = datasource.id.split("||")[0];

                //result['url'] = OpenaireProperties.getsearchLinkToDataProvider()+result['id'];

                result['count'] = datasource.count;

                if(result['id'] != id && result['name'] != "Unknown Repository") {

                    results.push(result);

                }

            }

        }

        return results;

    }

    numOfDatasets(url: string):any {

      return this.http.get((OpenaireProperties.isCacheEnabled())? (OpenaireProperties.getCacheUrl()+encodeURIComponent(url)): url)

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

                  .map(res => res.total);

    }

    numOfEntityDatasets(id: string, entity: string):any {

        var parameters = "";

        if(entity == "project") {

          parameters = "projects/"+id+"/datasets/count";

        }

        let url = OpenaireProperties.getSearchAPIURLLast()+parameters+"?format=json";

        return this.numOfDatasets(url);

    }

    numOfSearchDatasets(params: string):any {

        let url = OpenaireProperties.getSearchAPIURLLast()+"datasets/count?format=json";

        if(params != "") {

          url += "&q=" + params;

        }

        return this.numOfDatasets(url);

    }

}