client/src/app/videos/+video-watch/comment/video-comments.component.ts

   1 import { Component, Input, OnChanges, OnDestroy, OnInit, SimpleChanges, ViewChild, ElementRef } from '@angular/core'
   2 import { ActivatedRoute } from '@angular/router'
   3 import { ConfirmService } from '@app/core'
   4 import { NotificationsService } from 'angular2-notifications'
   5 import { Subscription } from 'rxjs'
   6 import { VideoCommentThreadTree } from '../../../../../../shared/models/videos/video-comment.model'
   7 import { AuthService } from '../../../core/auth'
   8 import { ComponentPagination } from '../../../shared/rest/component-pagination.model'
   9 import { User } from '../../../shared/users'
  10 import { VideoSortField } from '../../../shared/video/sort-field.type'
  11 import { VideoDetails } from '../../../shared/video/video-details.model'
  12 import { VideoComment } from './video-comment.model'
  13 import { VideoCommentService } from './video-comment.service'
  14 import { I18n } from '@ngx-translate/i18n-polyfill'
  15
  16 @Component({
  17   selector: 'my-video-comments',
  18   templateUrl: './video-comments.component.html',
  19   styleUrls: ['./video-comments.component.scss']
  20 })
  21 export class VideoCommentsComponent implements OnInit, OnChanges, OnDestroy {
  22   @ViewChild('commentHighlightBlock') commentHighlightBlock: ElementRef
  23   @Input() video: VideoDetails
  24   @Input() user: User
  25
  26   comments: VideoComment[] = []
  27   highlightedThread: VideoComment
  28   sort: VideoSortField = '-createdAt'
  29   componentPagination: ComponentPagination = {
  30     currentPage: 1,
  31     itemsPerPage: 10,
  32     totalItems: null
  33   }
  34   inReplyToCommentId: number
  35   threadComments: { [ id: number ]: VideoCommentThreadTree } = {}
  36   threadLoading: { [ id: number ]: boolean } = {}
  37
  38   private sub: Subscription
  39
  40   constructor (
  41     private authService: AuthService,
  42     private notificationsService: NotificationsService,
  43     private confirmService: ConfirmService,
  44     private videoCommentService: VideoCommentService,
  45     private activatedRoute: ActivatedRoute,
  46     private i18n: I18n
  47   ) {}
  48
  49   ngOnInit () {
  50     // Find highlighted comment in params
  51     this.sub = this.activatedRoute.params.subscribe(
  52       params => {
  53         if (params['threadId']) {
  54           const highlightedThreadId = +params['threadId']
  55           this.processHighlightedThread(highlightedThreadId)
  56         }
  57       }
  58     )
  59   }
  60
  61   ngOnChanges (changes: SimpleChanges) {
  62     if (changes['video']) {
  63       this.resetVideo()
  64     }
  65   }
  66
  67   ngOnDestroy () {
  68     if (this.sub) this.sub.unsubscribe()
  69   }
  70
  71   viewReplies (commentId: number, highlightThread = false) {
  72     this.threadLoading[commentId] = true
  73
  74     this.videoCommentService.getVideoThreadComments(this.video.id, commentId)
  75       .subscribe(
  76         res => {
  77           this.threadComments[commentId] = res
  78           this.threadLoading[commentId] = false
  79
  80           if (highlightThread) {
  81             this.highlightedThread = new VideoComment(res.comment)
  82
  83             // Scroll to the highlighted thread
  84             setTimeout(() => {
  85               // -60 because of the fixed header
  86               const scrollY = this.commentHighlightBlock.nativeElement.offsetTop - 60
  87               window.scroll(0, scrollY)
  88             }, 500)
  89           }
  90         },
  91
  92         err => this.notificationsService.error(this.i18n('Error'), err.message)
  93       )
  94   }
  95
  96   loadMoreComments () {
  97     this.videoCommentService.getVideoCommentThreads(this.video.id, this.componentPagination, this.sort)
  98       .subscribe(
  99         res => {
 100           this.comments = this.comments.concat(res.comments)
 101           this.componentPagination.totalItems = res.totalComments
 102         },
 103
 104         err => this.notificationsService.error(this.i18n('Error'), err.message)
 105       )
 106   }
 107
 108   onCommentThreadCreated (comment: VideoComment) {
 109     this.comments.unshift(comment)
 110   }
 111
 112   onWantedToReply (comment: VideoComment) {
 113     this.inReplyToCommentId = comment.id
 114   }
 115
 116   onResetReply () {
 117     this.inReplyToCommentId = undefined
 118   }
 119
 120   onThreadCreated (commentTree: VideoCommentThreadTree) {
 121     this.viewReplies(commentTree.comment.id)
 122   }
 123
 124   async onWantedToDelete (commentToDelete: VideoComment) {
 125     let message = 'Do you really want to delete this comment?'
 126     if (commentToDelete.totalReplies !== 0) {
 127       message += this.i18n(' {{totalReplies}} replies will be deleted too.', { totalReplies: commentToDelete.totalReplies })
 128     }
 129
 130     const res = await this.confirmService.confirm(message, this.i18n('Delete'))
 131     if (res === false) return
 132
 133     this.videoCommentService.deleteVideoComment(commentToDelete.videoId, commentToDelete.id)
 134       .subscribe(
 135         () => {
 136           // Delete the comment in the tree
 137           if (commentToDelete.inReplyToCommentId) {
 138             const thread = this.threadComments[commentToDelete.threadId]
 139             if (!thread) {
 140               console.error(`Cannot find thread ${commentToDelete.threadId} of the comment to delete ${commentToDelete.id}`)
 141               return
 142             }
 143
 144             this.deleteLocalCommentThread(thread, commentToDelete)
 145             return
 146           }
 147
 148           // Delete the thread
 149           this.comments = this.comments.filter(c => c.id !== commentToDelete.id)
 150           this.componentPagination.totalItems--
 151         },
 152
 153         err => this.notificationsService.error(this.i18n('Error'), err.message)
 154       )
 155   }
 156
 157   isUserLoggedIn () {
 158     return this.authService.isLoggedIn()
 159   }
 160
 161   onNearOfBottom () {
 162     this.componentPagination.currentPage++
 163
 164     if (this.hasMoreComments()) {
 165       this.loadMoreComments()
 166     }
 167   }
 168
 169   private hasMoreComments () {
 170     // No results
 171     if (this.componentPagination.totalItems === 0) return false
 172
 173     // Not loaded yet
 174     if (!this.componentPagination.totalItems) return true
 175
 176     const maxPage = this.componentPagination.totalItems / this.componentPagination.itemsPerPage
 177     return maxPage > this.componentPagination.currentPage
 178   }
 179
 180   private deleteLocalCommentThread (parentComment: VideoCommentThreadTree, commentToDelete: VideoComment) {
 181     for (const commentChild of parentComment.children) {
 182       if (commentChild.comment.id === commentToDelete.id) {
 183         parentComment.children = parentComment.children.filter(c => c.comment.id !== commentToDelete.id)
 184         return
 185       }
 186
 187       this.deleteLocalCommentThread(commentChild, commentToDelete)
 188     }
 189   }
 190
 191   private resetVideo () {
 192     if (this.video.commentsEnabled === true) {
 193       // Reset all our fields
 194       this.highlightedThread = null
 195       this.comments = []
 196       this.threadComments = {}
 197       this.threadLoading = {}
 198       this.inReplyToCommentId = undefined
 199       this.componentPagination.currentPage = 1
 200       this.componentPagination.totalItems = null
 201
 202       this.loadMoreComments()
 203     }
 204   }
 205
 206   private processHighlightedThread (highlightedThreadId: number) {
 207     this.highlightedThread = this.comments.find(c => c.id === highlightedThreadId)
 208
 209     const highlightThread = true
 210     this.viewReplies(highlightedThreadId, highlightThread)
 211   }
 212 }