-import { bufferTime, catchError, filter, first, map, share, switchMap } from 'rxjs/operators'
+import { bufferTime, catchError, filter, map, tap, share, switchMap } from 'rxjs/operators'
+import { Observable, ReplaySubject, Subject, of, merge } from 'rxjs'
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 { ComponentPaginationLight } from '@app/shared/rest/component-pagination.model'
+import { uniq } from 'lodash-es'
+import * as debug from 'debug'
+
+const logger = debug('peertube:subscriptions:UserSubscriptionService')
type SubscriptionExistResult = { [ uri: string ]: boolean }
+type SubscriptionExistResultObservable = { [ uri: string ]: Observable<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 existsSubject = new ReplaySubject<string>(1)
private readonly existsObservable: Observable<SubscriptionExistResult>
+ private myAccountSubscriptionCache: SubscriptionExistResult = {}
+ private myAccountSubscriptionCacheObservable: SubscriptionExistResultObservable = {}
+ private myAccountSubscriptionCacheSubject = new Subject<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()
+ this.existsObservable = merge(
+ this.existsSubject.pipe(
+ bufferTime(500),
+ filter(uris => uris.length !== 0),
+ map(uris => uniq(uris)),
+ switchMap(uris => this.doSubscriptionsExist(uris)),
+ share()
+ ),
+
+ this.myAccountSubscriptionCacheSubject
)
}
+ /**
+ * Subscription part
+ */
+
deleteSubscription (nameWithHost: string) {
const url = UserSubscriptionService.BASE_USER_SUBSCRIPTIONS_URL + '/' + nameWithHost
return this.authHttp.delete(url)
.pipe(
map(this.restExtractor.extractDataBool),
+ tap(() => {
+ this.myAccountSubscriptionCache[nameWithHost] = false
+
+ this.myAccountSubscriptionCacheSubject.next(this.myAccountSubscriptionCache)
+ }),
catchError(err => this.restExtractor.handleError(err))
)
}
return this.authHttp.post(url, body)
.pipe(
map(this.restExtractor.extractDataBool),
+ tap(() => {
+ this.myAccountSubscriptionCache[nameWithHost] = true
+
+ this.myAccountSubscriptionCacheSubject.next(this.myAccountSubscriptionCache)
+ }),
catchError(err => this.restExtractor.handleError(err))
)
}
)
}
+ /**
+ * SubscriptionExist part
+ */
+
+ listenToMyAccountSubscriptionCacheSubject () {
+ return this.myAccountSubscriptionCacheSubject.asObservable()
+ }
+
+ listenToSubscriptionCacheChange (nameWithHost: string) {
+ if (nameWithHost in this.myAccountSubscriptionCacheObservable) {
+ return this.myAccountSubscriptionCacheObservable[ nameWithHost ]
+ }
+
+ const obs = this.existsObservable
+ .pipe(
+ filter(existsResult => existsResult[ nameWithHost ] !== undefined),
+ map(existsResult => existsResult[ nameWithHost ])
+ )
+
+ this.myAccountSubscriptionCacheObservable[ nameWithHost ] = obs
+ return obs
+ }
+
doesSubscriptionExist (nameWithHost: string) {
+ logger('Running subscription check for %d.', nameWithHost)
+
+ if (nameWithHost in this.myAccountSubscriptionCache) {
+ logger('Found cache for %d.', nameWithHost)
+
+ return of(this.myAccountSubscriptionCache[ nameWithHost ])
+ }
+
this.existsSubject.next(nameWithHost)
- return this.existsObservable.pipe(first())
+ logger('Fetching from network for %d.', nameWithHost)
+ return this.existsObservable.pipe(
+ filter(existsResult => existsResult[ nameWithHost ] !== undefined),
+ map(existsResult => existsResult[ nameWithHost ]),
+ tap(result => this.myAccountSubscriptionCache[ nameWithHost ] = result)
+ )
}
private doSubscriptionsExist (uris: string[]): Observable<SubscriptionExistResult> {
params = this.restService.addObjectParams(params, { uris })
return this.authHttp.get<SubscriptionExistResult>(url, { params })
- .pipe(catchError(err => this.restExtractor.handleError(err)))
+ .pipe(
+ tap(res => {
+ this.myAccountSubscriptionCache = {
+ ...this.myAccountSubscriptionCache,
+ ...res
+ }
+ }),
+ catchError(err => this.restExtractor.handleError(err))
+ )
}
}