From 15e9d5ca39e0b792f61453fbf3885a0fc446afa7 Mon Sep 17 00:00:00 2001
From: Chocobozzz <me@florianbigard.com>
Date: Tue, 12 Mar 2019 11:40:42 +0100
Subject: Playlist reorder support

---
 ...my-account-video-playlist-elements.component.ts | 69 +++++++++++++++++++++-
 1 file changed, 68 insertions(+), 1 deletion(-)

(limited to '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 76aff3d4f..4076a3721 100644
--- 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
@@ -4,7 +4,7 @@ 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 { Subscription } from 'rxjs'
+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'
@@ -13,6 +13,8 @@ import { I18n } from '@ngx-translate/i18n-polyfill'
 import { secondsToTime } from '../../../assets/player/utils'
 import { VideoPlaylistElementUpdate } from '@shared/models'
 import { NgbDropdown } from '@ng-bootstrap/ng-bootstrap'
+import { CdkDragDrop, CdkDragMove } from '@angular/cdk/drag-drop'
+import { throttleTime } from 'rxjs/operators'
 
 @Component({
   selector: 'my-account-video-playlist-elements',
@@ -42,6 +44,7 @@ export class MyAccountVideoPlaylistElementsComponent implements OnInit, OnDestro
 
   private videoPlaylistId: string | number
   private paramsSub: Subscription
+  private dragMoveSubject = new Subject<number>()
 
   constructor (
     private authService: AuthService,
@@ -61,12 +64,66 @@ export class MyAccountVideoPlaylistElementsComponent implements OnInit, OnDestro
 
       this.loadPlaylistInfo()
     })
+
+    this.dragMoveSubject.asObservable()
+      .pipe(throttleTime(200))
+      .subscribe(y => this.checkScroll(y))
   }
 
   ngOnDestroy () {
     if (this.paramsSub) this.paramsSub.unsubscribe()
   }
 
+  drop (event: CdkDragDrop<any>) {
+    const previousIndex = event.previousIndex
+    const newIndex = event.currentIndex
+
+    if (previousIndex === newIndex) return
+
+    const oldPosition = this.videos[previousIndex].playlistElement.position
+    const insertAfter = newIndex === 0 ? 0 : this.videos[newIndex].playlistElement.position
+
+    this.videoPlaylistService.reorderPlaylist(this.playlist.id, oldPosition, insertAfter)
+      .subscribe(
+        () => { /* nothing to do */ },
+
+        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'
+    //   })
+    // }
+  }
+
   isVideoBlur (video: Video) {
     return video.isVideoNSFWForUser(this.authService.getUser(), this.serverService.getConfig())
   }
@@ -78,6 +135,7 @@ export class MyAccountVideoPlaylistElementsComponent implements OnInit, OnDestro
             this.notifier.success(this.i18n('Video removed from {{name}}', { name: this.playlist.displayName }))
 
             this.videos = this.videos.filter(v => v.id !== video.id)
+            this.reorderClientPositions()
           },
 
           err => this.notifier.error(err.message)
@@ -173,4 +231,13 @@ export class MyAccountVideoPlaylistElementsComponent implements OnInit, OnDestro
         this.playlist = playlist
       })
   }
+
+  private reorderClientPositions () {
+    let i = 1
+
+    for (const video of this.videos) {
+      video.playlistElement.position = i
+      i++
+    }
+  }
 }
-- 
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