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import { HttpStatusCode, ResultList, VideoPlaylistElement } from '../../../../../shared/models'
import { AuthHTTP } from './auth-http'
export class PlaylistFetcher {
constructor (private readonly http: AuthHTTP) {
}
async loadPlaylist (playlistId: string) {
const playlistPromise = this.loadPlaylistInfo(playlistId)
const playlistElementsPromise = this.loadPlaylistElements(playlistId)
let playlistResponse: Response
let isResponseOk: boolean
try {
playlistResponse = await playlistPromise
isResponseOk = playlistResponse.status === HttpStatusCode.OK_200
} catch (err) {
console.error(err)
isResponseOk = false
}
if (!isResponseOk) {
if (playlistResponse?.status === HttpStatusCode.NOT_FOUND_404) {
throw new Error('This playlist does not exist.')
}
throw new Error('We cannot fetch the playlist. Please try again later.')
}
return { playlistResponse, videosResponse: await playlistElementsPromise }
}
async loadAllPlaylistVideos (playlistId: string, baseResult: ResultList<VideoPlaylistElement>) {
let elements = baseResult.data
let total = baseResult.total
let i = 0
while (total > elements.length && i < 10) {
const result = await this.loadPlaylistElements(playlistId, elements.length)
const json = await result.json()
total = json.total
elements = elements.concat(json.data)
i++
}
if (i === 10) {
console.error('Cannot fetch all playlists elements, there are too many!')
}
return elements
}
private loadPlaylistInfo (playlistId: string): Promise<Response> {
return this.http.fetch(this.getPlaylistUrl(playlistId), { optionalAuth: true })
}
private loadPlaylistElements (playlistId: string, start = 0): Promise<Response> {
const url = new URL(this.getPlaylistUrl(playlistId) + '/videos')
url.search = new URLSearchParams({ start: '' + start, count: '100' }).toString()
return this.http.fetch(url.toString(), { optionalAuth: true })
}
private getPlaylistUrl (id: string) {
return window.location.origin + '/api/v1/video-playlists/' + id
}
}
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