Email address normalizer in CoffeeScript

email-normalizer.coffee

defaultOptions = 
	'normalizeGmail': true
	'lowerCaseLocal': true
	'stripTags': true
	'stripComments': true

class EmailNormalizer
	constructor: ( @email, options = {} ) ->
		@options = defaultOptions
		for own k, v of options
			@options[k] = v

	normalize: ( ) ->
		return @normalized if @normalized

		out = @email

		if @options.lowerCaseLocal
			out = out.toLowerCase( )

		if @options.stripTags
			out = out.replace /^([^+]+)(\+[^@]*)/, '$1' 

		if @options.stripComments
			out = out.replace /^((\([^)]*\))?)([^@]+)((\([^)]*\))?)\@/, '$3@'

		if @options.normalizeGmail
			out = out.split '@'

			if out[1] is 'googlemail.com'
				out[1] = 'gmail.com'

			out[0] = out[0].replace /\./g, ''

			out = out.join '@'

		@normalized = out
	
( module?.exports or window?.EmailNormalizer ) = EmailNormalizer