D-Net

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

import {HttpClient} from "@angular/common/http";

import {Observable}     from 'rxjs';

import {Metrics} from '../utils/entities/metrics';

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

import {map} from "rxjs/operators";

@Injectable()

export class MetricsService {

    metrics: Metrics;

    constructor(private http: HttpClient ) {}

    hasAltMetrics(url: string, doi: string): Observable<boolean> {

        return this.http.get(url + doi).pipe(map(res => !!(res)));

    }

    getMetrics (id: string, entityType: string, properties:EnvProperties):any {

        let url = properties.metricsAPIURL+entityType+"/"+id+"/clicks";

        let key = url;

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

                    .pipe(map(res => this.parseMetrics(res["downloads"], res["views"], res["total_downloads"], res["total_views"],

                                                  res["total_openaire_views"], res["total_openaire_downloads"], res["pageviews"], properties)));

    }

    parseMetrics(downloads: any, views: any, totalDownloads: number, totalViews: number,

                totalOpenaireViews: number, totalOpenaireDownloads: number, pageViews: number, properties:EnvProperties): any {

        this.metrics = new Metrics();

        this.metrics.totalDownloads = totalDownloads;

        this.metrics.totalViews = totalViews;

        this.metrics.totalOpenaireViews = totalOpenaireViews;

        this.metrics.totalOpenaireDownloads = totalOpenaireDownloads;

        this.metrics.pageViews = pageViews;

        this.metrics.infos = new Map<string, {"name": string, "url": string, "numOfDownloads": string, "numOfViews": string, "openaireDownloads": string, "openaireViews": string}>();

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

            let id: string = downloads[i]['datasource_id'];

            if(this.metrics.infos.has(id)) {

                this.metrics.infos.get(id).numOfDownloads = downloads[i]['value'];

                this.metrics.infos.get(id).openaireDownloads = downloads[i]['openaire'];

            } else {

                let info;//: {"url": string, "numOfDownloads": string, "numOfViews": string};

                info = {};

                info.name = downloads[i]['datasource_name'];

                info.url = properties.searchLinkToDataProvider+id;

                info.numOfDownloads = downloads[i]['value'];

                info.openaireDownloads = downloads[i]['openaire'];

                info.numOfViews = "0";

                info.openaireViews = "0";

                this.metrics.infos.set(id, info);

            }

        }

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

            let id: string = views[i]['datasource_id'];

            if(this.metrics.infos.has(id)) {

                this.metrics.infos.get(id).numOfViews = views[i]['value'];

                this.metrics.infos.get(id).openaireViews = views[i]['openaire'];

            } else {

                let info;//: {"url": string, "numOfDownloads": string, "numOfViews": string};

                info = {};

                info.name = views[i]['datasource_name'];

                info.url = properties.searchLinkToDataProvider + id;

                info.numOfDownloads = "0";

                info.openaireDownloads = "0";

                info.numOfViews = views[i]['value'];

                info.openaireViews = views[i]['openaire'];

                this.metrics.infos.set(id, info);

            }

        }

        return this.metrics;

    }

}