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import { bufferTime, catchError, filter, first, map, share, switchMap } from 'rxjs/operators'
import { HttpClient, HttpParams } from '@angular/common/http'
import { Injectable } from '@angular/core'
import { ResultList } from '../../../../../shared'
import { environment } from '../../../environments/environment'
import { RestExtractor, RestService } from '../rest'
import { Observable, ReplaySubject, Subject } from 'rxjs'
import { VideoChannel } from '@app/shared/video-channel/video-channel.model'
import { VideoChannelService } from '@app/shared/video-channel/video-channel.service'
import { VideoChannel as VideoChannelServer } from '../../../../../shared/models/videos'
import { ComponentPagination } from '@app/shared/rest/component-pagination.model'
type SubscriptionExistResult = { [ uri: string ]: boolean }
@Injectable()
export class UserSubscriptionService {
static BASE_USER_SUBSCRIPTIONS_URL = environment.apiUrl + '/api/v1/users/me/subscriptions'
// Use a replay subject because we "next" a value before subscribing
private existsSubject: Subject<string> = new ReplaySubject(1)
private readonly existsObservable: Observable<SubscriptionExistResult>
constructor (
private authHttp: HttpClient,
private restExtractor: RestExtractor,
private restService: RestService
) {
this.existsObservable = this.existsSubject.pipe(
bufferTime(500),
filter(uris => uris.length !== 0),
switchMap(uris => this.doSubscriptionsExist(uris)),
share()
)
}
deleteSubscription (nameWithHost: string) {
const url = UserSubscriptionService.BASE_USER_SUBSCRIPTIONS_URL + '/' + nameWithHost
return this.authHttp.delete(url)
.pipe(
map(this.restExtractor.extractDataBool),
catchError(err => this.restExtractor.handleError(err))
)
}
addSubscription (nameWithHost: string) {
const url = UserSubscriptionService.BASE_USER_SUBSCRIPTIONS_URL
const body = { uri: nameWithHost }
return this.authHttp.post(url, body)
.pipe(
map(this.restExtractor.extractDataBool),
catchError(err => this.restExtractor.handleError(err))
)
}
listSubscriptions (componentPagination: ComponentPagination): Observable<ResultList<VideoChannel>> {
const url = UserSubscriptionService.BASE_USER_SUBSCRIPTIONS_URL
const pagination = this.restService.componentPaginationToRestPagination(componentPagination)
let params = new HttpParams()
params = this.restService.addRestGetParams(params, pagination)
return this.authHttp.get<ResultList<VideoChannelServer>>(url, { params })
.pipe(
map(res => VideoChannelService.extractVideoChannels(res)),
catchError(err => this.restExtractor.handleError(err))
)
}
doesSubscriptionExist (nameWithHost: string) {
this.existsSubject.next(nameWithHost)
return this.existsObservable.pipe(first())
}
private doSubscriptionsExist (uris: string[]): Observable<SubscriptionExistResult> {
const url = UserSubscriptionService.BASE_USER_SUBSCRIPTIONS_URL + '/exist'
let params = new HttpParams()
params = this.restService.addObjectParams(params, { uris })
return this.authHttp.get<SubscriptionExistResult>(url, { params })
.pipe(catchError(err => this.restExtractor.handleError(err)))
}
}
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