client/src/app/shared/user-subscription/subscribe-button.component.ts

   1 import { Component, Input, OnInit } from '@angular/core'
   2 import { Router } from '@angular/router'
   3 import { AuthService, Notifier } from '@app/core'
   4 import { UserSubscriptionService } from '@app/shared/user-subscription/user-subscription.service'
   5 import { VideoChannel } from '@app/shared/video-channel/video-channel.model'
   6 import { I18n } from '@ngx-translate/i18n-polyfill'
   7 import { VideoService } from '@app/shared/video/video.service'
   8 import { FeedFormat } from '../../../../../shared/models/feeds'
   9 import { Account } from '@app/shared/account/account.model'
  10 import { forkJoin, merge } from 'rxjs'
  11
  12 @Component({
  13   selector: 'my-subscribe-button',
  14   templateUrl: './subscribe-button.component.html',
  15   styleUrls: [ './subscribe-button.component.scss' ]
  16 })
  17 export class SubscribeButtonComponent implements OnInit {
  18   /**
  19    * SubscribeButtonComponent can be used with a single VideoChannel passed as [VideoChannel],
  20    * or with an account and a full list of that account's videoChannels. The latter is intended
  21    * to allow mass un/subscription from an account's page, while keeping the channel-centric
  22    * subscription model.
  23    */
  24   @Input() account: Account
  25   @Input() videoChannels: VideoChannel[]
  26   @Input() displayFollowers = false
  27   @Input() size: 'small' | 'normal' = 'normal'
  28
  29   subscribed = new Map<string, boolean>()
  30
  31   constructor (
  32     private authService: AuthService,
  33     private router: Router,
  34     private notifier: Notifier,
  35     private userSubscriptionService: UserSubscriptionService,
  36     private i18n: I18n,
  37     private videoService: VideoService
  38   ) { }
  39
  40   get handle () {
  41     return this.account
  42       ? this.account.nameWithHost
  43       : this.videoChannel.name + '@' + this.videoChannel.host
  44   }
  45
  46   get channelHandle () {
  47     return this.getChannelHandler(this.videoChannel)
  48   }
  49
  50   get uri () {
  51     return this.account
  52       ? this.account.url
  53       : this.videoChannels[0].url
  54   }
  55
  56   get rssUri () {
  57     const rssFeed = this.account
  58       ? this.videoService
  59           .getAccountFeedUrls(this.account.id)
  60           .find(i => i.format === FeedFormat.RSS)
  61       : this.videoService
  62           .getVideoChannelFeedUrls(this.videoChannels[0].id)
  63           .find(i => i.format === FeedFormat.RSS)
  64
  65     return rssFeed.url
  66   }
  67
  68   get videoChannel () {
  69     return this.videoChannels[0]
  70   }
  71
  72   ngOnInit () {
  73     this.loadSubscribedStatus()
  74   }
  75
  76   subscribe () {
  77     if (this.isUserLoggedIn()) {
  78       return this.localSubscribe()
  79     }
  80
  81     return this.gotoLogin()
  82   }
  83
  84   localSubscribe () {
  85     const observableBatch = this.videoChannels
  86       .map(videoChannel => this.getChannelHandler(videoChannel))
  87       .filter(handle => this.subscribeStatus(false).includes(handle))
  88       .map(handle => this.userSubscriptionService.addSubscription(handle))
  89
  90     merge(observableBatch, 2)
  91       .subscribe(
  92         () => {
  93           this.notifier.success(
  94             this.account
  95               ? this.i18n(
  96                   'Subscribed to all current channels of {{nameWithHost}}. You will be notified of all their new videos.',
  97                   { nameWithHost: this.account.displayName }
  98                 )
  99               : this.i18n(
 100                   'Subscribed to {{nameWithHost}}. You will be notified of all their new videos.',
 101                   { nameWithHost: this.videoChannels[0].displayName }
 102                 )
 103             ,
 104             this.i18n('Subscribed')
 105           )
 106         },
 107
 108           err => this.notifier.error(err.message)
 109       )
 110   }
 111
 112   unsubscribe () {
 113     if (this.isUserLoggedIn()) {
 114       this.localUnsubscribe()
 115     }
 116   }
 117
 118   localUnsubscribe () {
 119     const observableBatch = this.videoChannels
 120       .map(videoChannel => this.getChannelHandler(videoChannel))
 121       .filter(handle => this.subscribeStatus(true).includes(handle))
 122       .map(handle => this.userSubscriptionService.deleteSubscription(handle))
 123
 124     forkJoin(observableBatch)
 125         .subscribe(
 126           () => {
 127             this.notifier.success(
 128               this.account
 129                 ? this.i18n('Unsubscribed from all channels of {{nameWithHost}}', { nameWithHost: this.account.nameWithHost })
 130                 : this.i18n('Unsubscribed from {{nameWithHost}}', { nameWithHost: this.videoChannels[0].nameWithHost })
 131               ,
 132               this.i18n('Unsubscribed')
 133             )
 134           },
 135
 136           err => this.notifier.error(err.message)
 137         )
 138   }
 139
 140   isUserLoggedIn () {
 141     return this.authService.isLoggedIn()
 142   }
 143
 144   isAllChannelsSubscribed () {
 145     return !Array.from(this.subscribed.values()).includes(false)
 146   }
 147
 148   isAtLeastOneChannelSubscribed () {
 149     return this.subscribeStatus(true).length > 0
 150   }
 151
 152   isBigButton () {
 153     return this.isUserLoggedIn() && this.videoChannels.length > 1 && this.isAtLeastOneChannelSubscribed()
 154   }
 155
 156   gotoLogin () {
 157     this.router.navigate([ '/login' ])
 158   }
 159
 160   subscribeStatus (subscribed: boolean) {
 161     const accumulator: string[] = []
 162     for (const [key, value] of this.subscribed.entries()) {
 163       if (value === subscribed) accumulator.push(key)
 164     }
 165
 166     return accumulator
 167   }
 168
 169   private getChannelHandler (videoChannel: VideoChannel) {
 170     return videoChannel.name + '@' + videoChannel.host
 171   }
 172
 173   private loadSubscribedStatus () {
 174     if (!this.isUserLoggedIn()) return
 175
 176     for (const videoChannel of this.videoChannels) {
 177       const handle = this.getChannelHandler(videoChannel)
 178       this.subscribed.set(handle, false)
 179       merge(
 180         this.userSubscriptionService.listenToSubscriptionCacheChange(handle),
 181         this.userSubscriptionService.doesSubscriptionExist(handle)
 182       )
 183           .subscribe(
 184             res => this.subscribed.set(handle, res),
 185
 186             err => this.notifier.error(err.message)
 187           )
 188     }
 189   }
 190 }