import { Subject, Subscription } from 'rxjs'
import { CdkDragDrop } from '@angular/cdk/drag-drop'
import { Component, OnDestroy, OnInit } from '@angular/core'
import { ActivatedRoute } from '@angular/router'
import { ComponentPagination, Notifier, ScreenService } from '@app/core'
import { VideoPlaylist, VideoPlaylistElement, VideoPlaylistService } from '@app/shared/shared-video-playlist'
@Component({
selector: 'my-account-video-playlist-elements',
templateUrl: './my-account-video-playlist-elements.component.html',
styleUrls: [ './my-account-video-playlist-elements.component.scss' ]
})
export class MyAccountVideoPlaylistElementsComponent implements OnInit, OnDestroy {
playlistElements: VideoPlaylistElement[] = []
playlist: VideoPlaylist
pagination: ComponentPagination = {
currentPage: 1,
itemsPerPage: 10,
totalItems: null
}
onDataSubject = new Subject<any[]>()
private videoPlaylistId: string | number
private paramsSub: Subscription
constructor (
private notifier: Notifier,
private route: ActivatedRoute,
private screenService: ScreenService,
private videoPlaylistService: VideoPlaylistService
) {}
ngOnInit () {
this.paramsSub = this.route.params.subscribe(routeParams => {
this.videoPlaylistId = routeParams[ 'videoPlaylistId' ]
this.loadElements()
this.loadPlaylistInfo()
})
}
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.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(
() => {
this.reorderClientPositions()
},
err => this.notifier.error(err.message)
)
}
onElementRemoved (element: VideoPlaylistElement) {
const oldFirst = this.findFirst()
this.playlistElements = this.playlistElements.filter(v => v.id !== element.id)
this.reorderClientPositions(oldFirst)
}
onNearOfBottom () {
// Last page
if (this.pagination.totalItems <= (this.pagination.currentPage * this.pagination.itemsPerPage)) return
this.pagination.currentPage += 1
this.loadElements()
}
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.videoPlaylistService.getPlaylistVideos(this.videoPlaylistId, this.pagination)
.subscribe(({ total, data }) => {
this.playlistElements = this.playlistElements.concat(data)
this.pagination.totalItems = total
this.onDataSubject.next(data)
})
}
private loadPlaylistInfo () {
this.videoPlaylistService.getVideoPlaylist(this.videoPlaylistId)
.subscribe(playlist => {
this.playlist = playlist
})
}
private reorderClientPositions (first?: VideoPlaylistElement) {
if (this.playlistElements.length === 0) return
const oldFirst = first || this.findFirst()
let i = 1
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)
}
}