D-Net

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

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

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

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

import {BehaviorSubject} from "rxjs";

import {map} from "rxjs/operators";

@Injectable()

export class CommunitiesService {

    public communities: BehaviorSubject<CommunityInfo[]> = null;

    constructor(private http: HttpClient) {

        this.communities = new BehaviorSubject(null);

    }

    updateCommunities(properties: EnvProperties, url: string) {

        this.getCommunities(properties, url).subscribe(res => {

                this.communities.next(res);

        })

    }

    getCommunitiesState() {

        return this.communities.asObservable();

    }

    getCommunities(properties: EnvProperties, url: string) {

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

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

                        .pipe(map(res => this.parseCommunities(res)));

    }

    parseCommunities(data: any): CommunityInfo[] {

        const communities: CommunityInfo[] = [];

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

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

            const resData = Array.isArray(data) ? data[i] : data;

            const result: CommunityInfo = new CommunityInfo();

            result['title'] = resData.name;

            result['shortTitle'] = resData.shortName;

            result['communityId'] = resData.id;

            result['queryId'] = resData.queryId;

            result['logoUrl'] = resData.logoUrl;

            result['description'] = resData.description;

            result['date'] = resData.creationDate;

            result['status'] = 'all';

            if (resData.hasOwnProperty('status')) {

                result['status'] = resData.status;

                const status = ['all', 'hidden', 'manager'];

                if (status.indexOf(result['status']) === -1) {

                    result['status'] = 'hidden';

                }

            }

            if (resData.type != null) {

                result['type'] = resData.type;

            }

            if (resData.managers != null) {

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

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

                }

                const managers = resData.managers;

                const lengthManagers = Array.isArray(managers) ? managers.length : 1;

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

                    const manager = Array.isArray(managers) ? managers[j] : managers;

                    result.managers[j] = manager;

                }

            }

            if (resData.subjects != null) {

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

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

                }

                const subjects = resData.subjects;

                const lengthSubjects = Array.isArray(subjects) ? subjects.length : 1;

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

                    const subject = Array.isArray(subjects) ? subjects[i] : subjects;

                    result.subjects[j] = subject;

                }

            }

            if (result['type'] === 'community' || result['type'] === 'ri') {

                communities.push(result);

            }

        }

        return communities;

    }

}