audiobookshelf/server/objects/PlaybackSession.js

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const date = require('date-and-time')
const { getId } = require('../utils/index')
const { PlayMethod } = require('../utils/constants')
const BookMetadata = require('./metadata/BookMetadata')
const PodcastMetadata = require('./metadata/PodcastMetadata')
class PlaybackSession {
constructor(session) {
this.id = null
this.userId = null
this.libraryItemId = null
this.episodeId = null
this.mediaType = null
this.mediaMetadata = null
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this.chapters = null
this.displayTitle = null
this.displayAuthor = null
this.coverPath = null
this.duration = null
this.playMethod = null
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this.mediaPlayer = null
this.date = null
this.dayOfWeek = null
this.timeListening = null
this.startedAt = null
this.updatedAt = null
// Not saved in DB
this.lastSave = 0
this.audioTracks = []
this.currentTime = 0
this.stream = null
if (session) {
this.construct(session)
}
}
toJSON() {
return {
id: this.id,
sessionType: this.sessionType,
userId: this.userId,
libraryItemId: this.libraryItemId,
episodeId: this.episodeId,
mediaType: this.mediaType,
mediaMetadata: this.mediaMetadata ? this.mediaMetadata.toJSON() : null,
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chapters: (this.chapters || []).map(c => ({ ...c })),
displayTitle: this.displayTitle,
displayAuthor: this.displayAuthor,
coverPath: this.coverPath,
duration: this.duration,
playMethod: this.playMethod,
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mediaPlayer: this.mediaPlayer,
date: this.date,
dayOfWeek: this.dayOfWeek,
timeListening: this.timeListening,
lastUpdate: this.lastUpdate,
updatedAt: this.updatedAt
}
}
toJSONForClient(libraryItem) {
return {
id: this.id,
sessionType: this.sessionType,
userId: this.userId,
libraryItemId: this.libraryItemId,
episodeId: this.episodeId,
mediaType: this.mediaType,
mediaMetadata: this.mediaMetadata ? this.mediaMetadata.toJSON() : null,
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chapters: (this.chapters || []).map(c => ({ ...c })),
displayTitle: this.displayTitle,
displayAuthor: this.displayAuthor,
coverPath: this.coverPath,
duration: this.duration,
playMethod: this.playMethod,
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mediaPlayer: this.mediaPlayer,
date: this.date,
dayOfWeek: this.dayOfWeek,
timeListening: this.timeListening,
lastUpdate: this.lastUpdate,
updatedAt: this.updatedAt,
audioTracks: this.audioTracks.map(at => at.toJSON()),
currentTime: this.currentTime,
libraryItem: libraryItem.toJSONExpanded()
}
}
construct(session) {
this.id = session.id
this.sessionType = session.sessionType
this.userId = session.userId
this.libraryItemId = session.libraryItemId
this.episodeId = session.episodeId
this.mediaType = session.mediaType
this.duration = session.duration
this.playMethod = session.playMethod
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this.mediaPlayer = session.mediaPlayer || null
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this.chapters = session.chapters || []
this.mediaMetadata = null
if (session.mediaMetadata) {
if (this.mediaType === 'book') {
this.mediaMetadata = new BookMetadata(session.mediaMetadata)
} else if (this.mediaType === 'podcast') {
this.mediaMetadata = new PodcastMetadata(session.mediaMetadata)
}
}
this.displayTitle = session.displayTitle || ''
this.displayAuthor = session.displayAuthor || ''
this.coverPath = session.coverPath
this.date = session.date
this.dayOfWeek = session.dayOfWeek
this.timeListening = session.timeListening || null
this.startedAt = session.startedAt
this.updatedAt = session.updatedAt || null
}
get progress() { // Value between 0 and 1
if (!this.duration) return 0
return Math.max(0, Math.min(this.currentTime / this.duration, 1))
}
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setData(libraryItem, user, mediaPlayer, episodeId = null) {
this.id = getId('play')
this.userId = user.id
this.libraryItemId = libraryItem.id
this.episodeId = episodeId
this.mediaType = libraryItem.mediaType
this.mediaMetadata = libraryItem.media.metadata.clone()
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this.chapters = (libraryItem.media.chapters || []).map(c => ({ ...c })) // Only book mediaType has chapters
this.displayTitle = libraryItem.media.getPlaybackTitle(episodeId)
this.displayAuthor = libraryItem.media.getPlaybackAuthor()
this.coverPath = libraryItem.media.coverPath
if (episodeId) {
this.duration = libraryItem.media.getEpisodeDuration(episodeId)
} else {
this.duration = libraryItem.media.duration
}
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this.mediaPlayer = mediaPlayer
this.timeListening = 0
this.date = date.format(new Date(), 'YYYY-MM-DD')
this.dayOfWeek = date.format(new Date(), 'dddd')
this.startedAt = Date.now()
this.updatedAt = Date.now()
}
addListeningTime(timeListened) {
if (!timeListened || isNaN(timeListened)) return
if (!this.date) {
// Set date info on first listening update
this.date = date.format(new Date(), 'YYYY-MM-DD')
this.dayOfWeek = date.format(new Date(), 'dddd')
}
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this.timeListening += Number.parseFloat(timeListened)
this.updatedAt = Date.now()
}
// New date since start of listening session
checkDateRollover() {
if (!this.date) return false
return date.format(new Date(), 'YYYY-MM-DD') !== this.date
}
}
module.exports = PlaybackSession