images.coffee

#!/usr/bin/env coffee

fs = require('fs')

IMG_PATH = './www/img/'

IMG_REGEX = /(\/img\/[^ \t\r\n'"]*)/igm

images = []

addImage = (img, cb) ->
	fs.stat img, (err, stat) ->
		if stat.isFile()
			cb img
		else if stat.isDirectory()
			getImages "#{img}/", cb

getImages = (path, callback) ->
	fs.readdir path, (err, files) ->
		i = 0
		files.forEach (file) ->
			addImage "#{path}#{file}", (img) ->
				images.push img
				i++
				callback() if i == files.length

SASS_PATH = './www/sass/'

readDir = (rootPath, cb) ->
	fs.readdir rootPath, (err, files) ->
		i = 0
		files.forEach (file) ->
			processFile "#{rootPath}#{file}", ->
				i++
				cb() if i == files.length

processFile = (file, cb) ->
	fs.stat file, (err, stat) ->
		if stat.isFile()
			readFile file, cb
		else if stat.isDirectory()
			readDir "#{file}/", cb

readFile = (filePath, next) ->
	fs.readFile filePath, encoding: 'utf-8', (err, data) ->
		while (imgPath = IMG_REGEX.exec(data)) isnt null
			imgPath = imgPath[0].replace(/[())]/ig, '')
			imgRx = new RegExp("#{imgPath}", 'i')
			matches = images.filter (img) -> imgRx.test(img)
			removeImg matches

		next()

removeImg = (img) ->
	if typeof img is 'string'
		index = images.indexOf img
		images.splice index, 1
	else
		img.forEach removeImg

getImages IMG_PATH, ->
	images = images.filter((img) -> !!img)
	images = images.filter((img) -> !~img?.indexOf('.DS_Store'))
	readDir(SASS_PATH, -> console.log images.join('\n'))