client/src/app/+my-account/my-account-video-playlists/my-account-video-playlist-elements.component.ts

   1 import { Component, OnDestroy, OnInit } from '@angular/core'
   2 import { Notifier, ServerService } from '@app/core'
   3 import { AuthService } from '../../core/auth'
   4 import { ConfirmService } from '../../core/confirm'
   5 import { ComponentPagination } from '@app/shared/rest/component-pagination.model'
   6 import { Subject, Subscription } from 'rxjs'
   7 import { ActivatedRoute } from '@angular/router'
   8 import { VideoPlaylistService } from '@app/shared/video-playlist/video-playlist.service'
   9 import { VideoPlaylist } from '@app/shared/video-playlist/video-playlist.model'
  10 import { I18n } from '@ngx-translate/i18n-polyfill'
  11 import { CdkDragDrop } from '@angular/cdk/drag-drop'
  12 import { VideoPlaylistElement } from '@app/shared/video-playlist/video-playlist-element.model'
  13
  14 @Component({
  15   selector: 'my-account-video-playlist-elements',
  16   templateUrl: './my-account-video-playlist-elements.component.html',
  17   styleUrls: [ './my-account-video-playlist-elements.component.scss' ]
  18 })
  19 export class MyAccountVideoPlaylistElementsComponent implements OnInit, OnDestroy {
  20   playlistElements: VideoPlaylistElement[] = []
  21   playlist: VideoPlaylist
  22
  23   pagination: ComponentPagination = {
  24     currentPage: 1,
  25     itemsPerPage: 10,
  26     totalItems: null
  27   }
  28
  29   onDataSubject = new Subject<any[]>()
  30
  31   private videoPlaylistId: string | number
  32   private paramsSub: Subscription
  33
  34   constructor (
  35     private authService: AuthService,
  36     private serverService: ServerService,
  37     private notifier: Notifier,
  38     private confirmService: ConfirmService,
  39     private route: ActivatedRoute,
  40     private i18n: I18n,
  41     private videoPlaylistService: VideoPlaylistService
  42   ) {}
  43
  44   ngOnInit () {
  45     this.paramsSub = this.route.params.subscribe(routeParams => {
  46       this.videoPlaylistId = routeParams[ 'videoPlaylistId' ]
  47       this.loadElements()
  48
  49       this.loadPlaylistInfo()
  50     })
  51   }
  52
  53   ngOnDestroy () {
  54     if (this.paramsSub) this.paramsSub.unsubscribe()
  55   }
  56
  57   drop (event: CdkDragDrop<any>) {
  58     const previousIndex = event.previousIndex
  59     const newIndex = event.currentIndex
  60
  61     if (previousIndex === newIndex) return
  62
  63     const oldPosition = this.playlistElements[previousIndex].position
  64     let insertAfter = this.playlistElements[newIndex].position
  65
  66     if (oldPosition > insertAfter) insertAfter--
  67
  68     const element = this.playlistElements[previousIndex]
  69
  70     this.playlistElements.splice(previousIndex, 1)
  71     this.playlistElements.splice(newIndex, 0, element)
  72
  73     this.videoPlaylistService.reorderPlaylist(this.playlist.id, oldPosition, insertAfter)
  74       .subscribe(
  75         () => {
  76           this.reorderClientPositions()
  77         },
  78
  79         err => this.notifier.error(err.message)
  80       )
  81   }
  82
  83   onElementRemoved (element: VideoPlaylistElement) {
  84     const oldFirst = this.findFirst()
  85
  86     this.playlistElements = this.playlistElements.filter(v => v.id !== element.id)
  87     this.reorderClientPositions(oldFirst)
  88   }
  89
  90   onNearOfBottom () {
  91     // Last page
  92     if (this.pagination.totalItems <= (this.pagination.currentPage * this.pagination.itemsPerPage)) return
  93
  94     this.pagination.currentPage += 1
  95     this.loadElements()
  96   }
  97
  98   trackByFn (index: number, elem: VideoPlaylistElement) {
  99     return elem.id
 100   }
 101
 102   private loadElements () {
 103     this.videoPlaylistService.getPlaylistVideos(this.videoPlaylistId, this.pagination)
 104         .subscribe(({ total, data }) => {
 105           this.playlistElements = this.playlistElements.concat(data)
 106           this.pagination.totalItems = total
 107
 108           this.onDataSubject.next(data)
 109         })
 110   }
 111
 112   private loadPlaylistInfo () {
 113     this.videoPlaylistService.getVideoPlaylist(this.videoPlaylistId)
 114       .subscribe(playlist => {
 115         this.playlist = playlist
 116       })
 117   }
 118
 119   private reorderClientPositions (first?: VideoPlaylistElement) {
 120     if (this.playlistElements.length === 0) return
 121
 122     const oldFirst = first || this.findFirst()
 123     let i = 1
 124
 125     for (const element of this.playlistElements) {
 126       element.position = i
 127       i++
 128     }
 129
 130     // Reload playlist thumbnail if the first element changed
 131     const newFirst = this.findFirst()
 132     if (oldFirst && newFirst && oldFirst.id !== newFirst.id) {
 133       this.playlist.refreshThumbnail()
 134     }
 135   }
 136
 137   private findFirst () {
 138     return this.playlistElements.find(e => e.position === 1)
 139   }
 140 }