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 { 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: 30,
  26     totalItems: null
  27   }
  28
  29   private videoPlaylistId: string | number
  30   private paramsSub: Subscription
  31
  32   constructor (
  33     private authService: AuthService,
  34     private serverService: ServerService,
  35     private notifier: Notifier,
  36     private confirmService: ConfirmService,
  37     private route: ActivatedRoute,
  38     private i18n: I18n,
  39     private videoPlaylistService: VideoPlaylistService
  40   ) {}
  41
  42   ngOnInit () {
  43     this.paramsSub = this.route.params.subscribe(routeParams => {
  44       this.videoPlaylistId = routeParams[ 'videoPlaylistId' ]
  45       this.loadElements()
  46
  47       this.loadPlaylistInfo()
  48     })
  49   }
  50
  51   ngOnDestroy () {
  52     if (this.paramsSub) this.paramsSub.unsubscribe()
  53   }
  54
  55   drop (event: CdkDragDrop<any>) {
  56     const previousIndex = event.previousIndex
  57     const newIndex = event.currentIndex
  58
  59     if (previousIndex === newIndex) return
  60
  61     const oldPosition = this.playlistElements[previousIndex].position
  62     let insertAfter = this.playlistElements[newIndex].position
  63
  64     if (oldPosition > insertAfter) insertAfter--
  65
  66     const element = this.playlistElements[previousIndex]
  67
  68     this.playlistElements.splice(previousIndex, 1)
  69     this.playlistElements.splice(newIndex, 0, element)
  70
  71     this.videoPlaylistService.reorderPlaylist(this.playlist.id, oldPosition, insertAfter)
  72       .subscribe(
  73         () => {
  74           this.reorderClientPositions()
  75         },
  76
  77         err => this.notifier.error(err.message)
  78       )
  79   }
  80
  81   onElementRemoved (element: VideoPlaylistElement) {
  82     const oldFirst = this.findFirst()
  83
  84     this.playlistElements = this.playlistElements.filter(v => v.id !== element.id)
  85     this.reorderClientPositions(oldFirst)
  86   }
  87
  88   onNearOfBottom () {
  89     // Last page
  90     if (this.pagination.totalItems <= (this.pagination.currentPage * this.pagination.itemsPerPage)) return
  91
  92     this.pagination.currentPage += 1
  93     this.loadElements()
  94   }
  95
  96   trackByFn (index: number, elem: VideoPlaylistElement) {
  97     return elem.id
  98   }
  99
 100   private loadElements () {
 101     this.videoPlaylistService.getPlaylistVideos(this.videoPlaylistId, this.pagination)
 102         .subscribe(({ total, data }) => {
 103           this.playlistElements = this.playlistElements.concat(data)
 104           this.pagination.totalItems = total
 105         })
 106   }
 107
 108   private loadPlaylistInfo () {
 109     this.videoPlaylistService.getVideoPlaylist(this.videoPlaylistId)
 110       .subscribe(playlist => {
 111         this.playlist = playlist
 112       })
 113   }
 114
 115   private reorderClientPositions (first?: VideoPlaylistElement) {
 116     if (this.playlistElements.length === 0) return
 117
 118     const oldFirst = first || this.findFirst()
 119     let i = 1
 120
 121     for (const element of this.playlistElements) {
 122       element.position = i
 123       i++
 124     }
 125
 126     // Reload playlist thumbnail if the first element changed
 127     const newFirst = this.findFirst()
 128     if (oldFirst && newFirst && oldFirst.id !== newFirst.id) {
 129       this.playlist.refreshThumbnail()
 130     }
 131   }
 132
 133   private findFirst () {
 134     return this.playlistElements.find(e => e.position === 1)
 135   }
 136 }