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#!/usr/bin/env node
'use strict'
const fs = require('fs')
const { promisify } = require('util')
const loopPlay = require('./loop-play')
const processArgv = require('./process-argv')
const downloaders = require('./downloaders')
const pickers = require('./pickers')
const {
filterPlaylistByPathString, removeGroupByPathString, getPlaylistTreeString
} = require('./playlist-utils')
const readFile = promisify(fs.readFile)
readFile('./playlist.json', 'utf-8')
.then(plText => JSON.parse(plText))
.then(async playlist => {
let sourcePlaylist = playlist
let curPlaylist = playlist
let pickerType = 'shuffle'
let downloaderType = 'http'
let playOpts = []
// WILL play says whether the user has forced playback via an argument.
// SHOULD play says whether the program has automatically decided to play
// or not, if the user hasn't set WILL play.
let shouldPlay = true
let willPlay = null
await processArgv(process.argv, {
'-open': async function(util) {
// --open <file> (alias: -o)
// Opens a separate playlist file.
// This sets the source playlist.
const playlistText = await readFile(util.nextArg(), 'utf-8')
const openedPlaylist = JSON.parse(playlistText)
sourcePlaylist = openedPlaylist
curPlaylist = openedPlaylist
},
'o': util => util.alias('-open'),
'-clear': function(util) {
// --clear (alias: -c)
// Clears the active playlist. This does not affect the source
// playlist.
curPlaylist = []
},
'c': util => util.alias('-clear'),
'-keep': function(util) {
// --keep <groupPath> (alias: -k)
// Keeps a group by loading it from the source playlist into the
// active playlist. This is usually useful after clearing the
// active playlist; it can also be used to keep a subgroup when
// you've removed an entire parent group, e.g. `-r foo -k foo/baz`.
const pathString = util.nextArg()
const group = filterPlaylistByPathString(sourcePlaylist, pathString)
curPlaylist.push(group)
},
'k': util => util.alias('-keep'),
'-remove': function(util) {
// --remove <groupPath> (alias: -r, -x)
// Filters the playlist so that the given path is removed.
const pathString = util.nextArg()
console.log("Ignoring path: " + pathString)
removeGroupByPathString(curPlaylist, pathString)
},
'r': util => util.alias('-remove'),
'x': util => util.alias('-remove'),
'-list-groups': function(util) {
// --list-groups (alias: -l, --list)
// Lists all groups in the playlist.
console.log(getPlaylistTreeString(curPlaylist))
// If this is the last item in the argument list, the user probably
// only wants to get the list, so we'll mark the 'should run' flag
// as false.
if (util.index === util.argv.length - 1) {
shouldPlay = false
}
},
'-list': util => util.alias('-list-groups'),
'l': util => util.alias('-list-groups'),
'-list-all': function(util) {
// --list-all (alias: --list-tracks, -L)
// Lists all groups and tracks in the playlist.
console.log(getPlaylistTreeString(curPlaylist, true))
// As with -l, if this is the last item in the argument list, we
// won't actually be playing the playlist.
if (util.index === util.argv.length - 1) {
shouldPlay = false
}
},
'-list-tracks': util => util.alias('-list-all'),
'L': util => util.alias('-list-all'),
'-play': function(util) {
// --play (alias: -p)
// Forces the playlist to actually play.
willPlay = true
},
'p': util => util.alias('-play'),
'-no-play': function(util) {
// --no-play (alias: -np)
// Forces the playlist not to play.
willPlay = false
},
'np': util => util.alias('-no-play'),
'-picker': function(util) {
// --picker <picker type>
// Selects the mode that the song to play is picked.
// See pickers.js.
pickerType = util.nextArg()
},
'-downloader': function(util) {
// --downloader <downloader type>
// Selects the mode that songs will be downloaded with.
// See downloaders.js.
downloaderType = util.nextArg()
},
'-play-opts': function(util) {
// --play-opts <opts>
// Sets command line options passed to the `play` command.
playOpts = util.nextArg().split(' ')
},
'-debug-list': function(util) {
// --debug-list
// Prints out the JSON representation of the active playlist.
console.log(JSON.stringify(curPlaylist, null, 2))
}
})
if (willPlay || (willPlay === null && shouldPlay)) {
let picker
if (pickerType === 'shuffle') {
console.log("Using shuffle picker.")
picker = pickers.makeShufflePlaylistPicker(curPlaylist)
} else if (pickerType === 'ordered') {
console.log("Using ordered picker.")
picker = pickers.makeOrderedPlaylistPicker(curPlaylist)
} else {
console.error("Invalid picker type: " + pickerType)
return
}
let downloader
if (downloaderType === 'http') {
console.log("Using HTTP downloader.")
downloader = downloaders.makeHTTPDownloader()
} else if (downloaderType === 'youtube') {
console.log("Using YouTube downloader.")
downloader = downloaders.makeYouTubeDownloader()
} else {
console.error("Invalid downloader type: " + downloaderType)
return
}
return loopPlay(picker, downloader, playOpts)
} else {
return curPlaylist
}
})
.catch(err => console.error(err))
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