Lazy load static objects

[github/Chocobozzz/PeerTube.git] / client / src / app / +my-account / my-account-video-playlists / my-account-video-playlist-elements.component.ts

diff --git a/client/src/app/+my-account/my-account-video-playlists/my-account-video-playlist-elements.component.ts b/client/src/app/+my-account/my-account-video-playlists/my-account-video-playlist-elements.component.ts
index 03f34412cabdd6e372104589278211cc79874105..366640618d54e3c198e4da9f6ec4e3cad0b9b993 100644 (file)
--- a/client/src/app/+my-account/my-account-video-playlists/my-account-video-playlist-elements.component.ts
+++ b/client/src/app/+my-account/my-account-video-playlists/my-account-video-playlist-elements.component.ts
@@ -3,15 +3,14 @@ import { Notifier, ServerService } from '@app/core'
 import { AuthService } from '../../core/auth'
 import { ConfirmService } from '../../core/confirm'
 import { ComponentPagination } from '@app/shared/rest/component-pagination.model'
-import { Video } from '@app/shared/video/video.model'
 import { Subject, Subscription } from 'rxjs'
 import { ActivatedRoute } from '@angular/router'
-import { VideoService } from '@app/shared/video/video.service'
 import { VideoPlaylistService } from '@app/shared/video-playlist/video-playlist.service'
 import { VideoPlaylist } from '@app/shared/video-playlist/video-playlist.model'
 import { I18n } from '@ngx-translate/i18n-polyfill'
-import { CdkDragDrop, CdkDragMove } from '@angular/cdk/drag-drop'
-import { throttleTime } from 'rxjs/operators'
+import { ScreenService } from '@app/shared/misc/screen.service'
+import { CdkDragDrop } from '@angular/cdk/drag-drop'
+import { VideoPlaylistElement } from '@app/shared/video-playlist/video-playlist-element.model'
 
 @Component({
   selector: 'my-account-video-playlist-elements',
@@ -19,18 +18,19 @@ import { throttleTime } from 'rxjs/operators'
   styleUrls: [ './my-account-video-playlist-elements.component.scss' ]
 })
 export class MyAccountVideoPlaylistElementsComponent implements OnInit, OnDestroy {
-  videos: Video[] = []
+  playlistElements: VideoPlaylistElement[] = []
   playlist: VideoPlaylist
 
   pagination: ComponentPagination = {
     currentPage: 1,
-    itemsPerPage: 30,
+    itemsPerPage: 10,
     totalItems: null
   }
 
+  onDataSubject = new Subject<any[]>()
+
   private videoPlaylistId: string | number
   private paramsSub: Subscription
-  private dragMoveSubject = new Subject<number>()
 
   constructor (
     private authService: AuthService,
@@ -39,7 +39,7 @@ export class MyAccountVideoPlaylistElementsComponent implements OnInit, OnDestro
     private confirmService: ConfirmService,
     private route: ActivatedRoute,
     private i18n: I18n,
-    private videoService: VideoService,
+    private screenService: ScreenService,
     private videoPlaylistService: VideoPlaylistService
   ) {}
 
@@ -50,10 +50,6 @@ export class MyAccountVideoPlaylistElementsComponent implements OnInit, OnDestro
 
       this.loadPlaylistInfo()
     })
-
-    this.dragMoveSubject.asObservable()
-      .pipe(throttleTime(200))
-      .subscribe(y => this.checkScroll(y))
   }
 
   ngOnDestroy () {
@@ -66,55 +62,31 @@ export class MyAccountVideoPlaylistElementsComponent implements OnInit, OnDestro
 
     if (previousIndex === newIndex) return
 
-    const oldPosition = this.videos[previousIndex].playlistElement.position
-    let insertAfter = this.videos[newIndex].playlistElement.position
+    const oldPosition = this.playlistElements[previousIndex].position
+    let insertAfter = this.playlistElements[newIndex].position
 
     if (oldPosition > insertAfter) insertAfter--
 
+    const element = this.playlistElements[previousIndex]
+
+    this.playlistElements.splice(previousIndex, 1)
+    this.playlistElements.splice(newIndex, 0, element)
+
     this.videoPlaylistService.reorderPlaylist(this.playlist.id, oldPosition, insertAfter)
       .subscribe(
-        () => { /* nothing to do */ },
+        () => {
+          this.reorderClientPositions()
+        },
 
         err => this.notifier.error(err.message)
       )
-
-    const video = this.videos[previousIndex]
-
-    this.videos.splice(previousIndex, 1)
-    this.videos.splice(newIndex, 0, video)
-
-    this.reorderClientPositions()
   }
 
-  onDragMove (event: CdkDragMove<any>) {
-    this.dragMoveSubject.next(event.pointerPosition.y)
-  }
-
-  checkScroll (pointerY: number) {
-    // FIXME: Uncomment when https://github.com/angular/material2/issues/14098 is fixed
-    // FIXME: Remove when https://github.com/angular/material2/issues/13588 is implemented
-    // if (pointerY < 150) {
-    //   window.scrollBy({
-    //     left: 0,
-    //     top: -20,
-    //     behavior: 'smooth'
-    //   })
-    //
-    //   return
-    // }
-    //
-    // if (window.innerHeight - pointerY <= 50) {
-    //   window.scrollBy({
-    //     left: 0,
-    //     top: 20,
-    //     behavior: 'smooth'
-    //   })
-    // }
-  }
+  onElementRemoved (element: VideoPlaylistElement) {
+    const oldFirst = this.findFirst()
 
-  onElementRemoved (video: Video) {
-    this.videos = this.videos.filter(v => v.id !== video.id)
-    this.reorderClientPositions()
+    this.playlistElements = this.playlistElements.filter(v => v.id !== element.id)
+    this.reorderClientPositions(oldFirst)
   }
 
   onNearOfBottom () {
@@ -125,15 +97,34 @@ export class MyAccountVideoPlaylistElementsComponent implements OnInit, OnDestro
     this.loadElements()
   }
 
-  trackByFn (index: number, elem: Video) {
+  trackByFn (index: number, elem: VideoPlaylistElement) {
     return elem.id
   }
 
+  /**
+   * Returns null to not have drag and drop delay.
+   * In small views, where elements are about 100% wide,
+   * we add a delay to prevent unwanted drag&drop.
+   *
+   * @see {@link https://github.com/Chocobozzz/PeerTube/issues/2078}
+   *
+   * @returns {null|number} Null for no delay, or a number in milliseconds.
+   */
+  getDragStartDelay (): null | number {
+    if (this.screenService.isInTouchScreen()) {
+      return 500
+    }
+
+    return null
+  }
+
   private loadElements () {
-    this.videoService.getPlaylistVideos(this.videoPlaylistId, this.pagination)
-        .subscribe(({ totalVideos, videos }) => {
-          this.videos = this.videos.concat(videos)
-          this.pagination.totalItems = totalVideos
+    this.videoPlaylistService.getPlaylistVideos(this.videoPlaylistId, this.pagination)
+        .subscribe(({ total, data }) => {
+          this.playlistElements = this.playlistElements.concat(data)
+          this.pagination.totalItems = total
+
+          this.onDataSubject.next(data)
         })
   }
 
@@ -144,12 +135,25 @@ export class MyAccountVideoPlaylistElementsComponent implements OnInit, OnDestro
       })
   }
 
-  private reorderClientPositions () {
+  private reorderClientPositions (first?: VideoPlaylistElement) {
+    if (this.playlistElements.length === 0) return
+
+    const oldFirst = first || this.findFirst()
     let i = 1
 
-    for (const video of this.videos) {
-      video.playlistElement.position = i
+    for (const element of this.playlistElements) {
+      element.position = i
       i++
     }
+
+    // Reload playlist thumbnail if the first element changed
+    const newFirst = this.findFirst()
+    if (oldFirst && newFirst && oldFirst.id !== newFirst.id) {
+      this.playlist.refreshThumbnail()
+    }
+  }
+
+  private findFirst () {
+    return this.playlistElements.find(e => e.position === 1)
   }
 }