mp3sorter

'''
mp3sorter.coffee - Sorts mp3 files into directories as dir/artist/album/title.mp3
Original written in C by Speed
by justin_
Run the program twice if there are sync issues.
'''
fs = require 'fs'

# Trims the junk.
trimData = (data) ->
    data[0..2] = []

String::removeJunk = ->
    this.replace /\u0000/gi, ''

# Parses the MP3s and sorts the songs.
sort = (filePath, oldDir, destDir) ->
    fs.readFile filePath, (err, data) ->
        parseData = data[(data.length - 128)..]
        change = 28
        offset = change
        trimData parseData
        title = parseData[0..offset].toString('utf-8', 0).removeJunk()
        artist = parseData[offset..(offset + change)].toString('utf-8', 0).removeJunk()
        offset += change
        album = parseData[offset..(offset + change)].toString('utf-8', 0).removeJunk()
        console.log "Title: #{title}\tArtist: #{artist}\tAlbum: #{album}"

        baseDir = "#{__dirname}/#{destDir}"
        fs.exists baseDir, (exists) ->
            if not exists
                fs.mkdir baseDir, (err) ->
        fs.exists "#{baseDir}/#{artist}", (exists) ->
            if not exists
                fs.mkdir "#{baseDir}/#{artist}", (err) ->
        fs.exists "#{baseDir}/#{artist}/#{album}", (exists) ->
            if not exists
                fs.mkdir "#{baseDir}/#{artist}/#{album}", (err) ->
        fs.writeFile "#{baseDir}/#{artist}/#{album}/#{title}.mp3", data, (err) ->
            console.log err

argc = process.argv.length - 2
argv = process.argv[2..]

if argc is 0
    console.log 'Usage: mp3sorter  in-dir [out-dir]'
else if argc >= 1
    dir = if argc is 1 then __dirname else argv[argc - 1]
    console.log "Output directory: #{dir}"
    path = "#{__dirname}/#{argv[0]}"
    fs.lstat "#{path}", (err, stats) ->
        if stats.isDirectory()
            fs.readdir path, (err, files) ->
                for item in files
                    if /\.mp3$/.test item
                        console.log "Processing #{item}"
                        sort "#{path}/#{item}", path, dir
        else
            console.log 'nope'