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const { getDownloaderFor } = require('./downloaders')
const { getPlayer } = require('./players')
const { parentSymbol } = require('./playlist-utils')
const ansi = require('./tui-lib/util/ansi')
const Button = require('./tui-lib/ui/form/Button')
const FocusElement = require('./tui-lib/ui/form/FocusElement')
const ListScrollForm = require('./tui-lib/ui/form/ListScrollForm')
const Pane = require('./tui-lib/ui/Pane')
const RecordStore = require('./record-store')
const telc = require('./tui-lib/util/telchars')
class AppElement extends FocusElement {
constructor() {
super()
this.player = null
this.recordStore = new RecordStore()
this.pane = new Pane()
this.addChild(this.pane)
this.grouplikeListingElement = new GrouplikeListingElement(this.recordStore)
this.pane.addChild(this.grouplikeListingElement)
this.grouplikeListingElement.on('download', item => this.downloadGrouplikeItem(item))
this.grouplikeListingElement.on('play', item => this.playGrouplikeItem(item))
}
async setup() {
this.player = await getPlayer()
}
async shutdown() {
await this.player.kill()
this.emit('quitRequested')
}
fixLayout() {
this.w = this.parent.contentW
this.h = this.parent.contentH
this.pane.w = this.contentW
this.pane.h = this.contentH
this.grouplikeListingElement.w = this.pane.contentW
this.grouplikeListingElement.h = this.pane.contentH
}
keyPressed(keyBuf) {
if (keyBuf[0] === 0x03 || keyBuf[0] === 'q'.charCodeAt(0) || keyBuf[0] === 'Q'.charCodeAt(0)) {
this.shutdown()
return
}
super.keyPressed(keyBuf)
}
async downloadGrouplikeItem(item) {
// TODO: Check if it's an item or a group
const arg = item.downloaderArg
this.recordStore.getRecord(item).downloading = true
try {
return await getDownloaderFor(arg)(arg)
} finally {
this.recordStore.getRecord(item).downloading = false
}
}
async playGrouplikeItem(item) {
if (this.player === null) {
throw new Error('Attempted to play before a player was loaded')
}
let playingThisTrack = true
this.emit('playing new track')
this.once('playing new track', () => {
playingThisTrack = false
})
// TODO: Check if it's an item or a group
const downloadFile = await this.downloadGrouplikeItem(item)
await this.player.kill()
this.recordStore.getRecord(item).playing = true
try {
await this.player.playFile(downloadFile)
} finally {
this.recordStore.getRecord(item).playing = false
}
// playingThisTrack now means whether the track played through to the end
// (true), or was stopped by a different track being started (false).
if (playingThisTrack) {
this.playNextTrack(item)
}
}
playNextTrack(track) {
const parent = track[parentSymbol]
if (!parent) {
return
}
const index = parent.items.indexOf(track)
const nextItem = parent.items[index + 1]
if (nextItem) {
this.playGrouplikeItem(nextItem)
}
}
}
class GrouplikeListingElement extends ListScrollForm {
constructor(recordStore) {
super('vertical')
this.grouplike = null
this.recordStore = recordStore
}
loadGrouplike(grouplike) {
this.grouplike = grouplike
this.buildItems()
}
buildItems() {
if (!this.grouplike) {
throw new Error('Attempted to call buildItems before a grouplike was loaded')
}
for (const item of this.grouplike.items) {
const itemElement = new GrouplikeItemElement(item, this.recordStore)
itemElement.on('download', () => this.emit('download', item))
itemElement.on('play', () => this.emit('play', item))
this.addInput(itemElement)
}
this.fixLayout()
}
}
class GrouplikeItemElement extends Button {
constructor(item, recordStore) {
super()
this.item = item
this.recordStore = recordStore
}
fixLayout() {
this.w = this.parent.contentW
this.h = 1
}
drawTo(writable) {
if (this.isFocused) {
writable.write(ansi.invert())
}
writable.write(ansi.moveCursor(this.absTop, this.absLeft))
this.drawX = this.x
this.writeStatus(writable)
this.drawX += this.item.name.length
writable.write(this.item.name)
writable.write(' '.repeat(this.w - this.drawX))
writable.write(ansi.resetAttributes())
}
writeStatus(writable) {
this.drawX += 3
const braille = '⠈⠐⠠⠄⠂⠁'
const brailleChar = braille[Math.floor(Date.now() / 250) % 6]
const record = this.recordStore.getRecord(this.item)
writable.write(' ')
if (record.downloading) {
writable.write(braille[Math.floor(Date.now() / 250) % 6])
} else if (record.playing) {
writable.write('\u25B6')
} else {
writable.write(' ')
}
writable.write(' ')
}
keyPressed(keyBuf) {
// TODO: Helper function for this
if (keyBuf[0] === 'd'.charCodeAt(0) || keyBuf[0] === 'D'.charCodeAt(0)) {
this.emit('download')
}
if (telc.isSelect(keyBuf)) {
this.emit('play')
}
}
}
module.exports.AppElement = AppElement
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