module Minifier

# File lib/minifier/minifier.rb, line 31
def self.make_file(minified) 
  file = StringIO.new(minified)
  return file
end

# File lib/minifier/minifier.rb, line 6
def self.minify(input)
  #get file
  file = (input.is_a?(IO)) ? input.read : input.dup.to_s
  #comment removal
  file = file.gsub(/\/*\*[\s\S]*?\*\/*/, '')
  
  #whitespace removal
  file = file.gsub(/\s+/, ' ')
  
  #add semicolons (but prevent redundant)
  file = file.gsub(/([^;\}])\}/, '\1;}')
  file = file.gsub(/;+\}/, '}')
  
  #RGB values to hex values (for css) - thanks to StackOverflow
  file = file.gsub(/rgb\s*\(\s*([0-9,\s]+)\s*\)/) do |match|
    '#' << $1.scan(/\d+/).map{|n| n.to_i.to_s(16).rjust(2, '0') }.join
  end
  
  # Replace 0(% ...) with just 0 (first two elements)
  file = file.gsub(/([\s:])([+-]?0)(?:%|em|ex|px|in|cm|mm)/i, '\1\2') #take out the last part
  
  file.strip
end

# File lib/minifier/minifier.rb, line 37
def self.strip_comments(markers = ['#','//'] )
  re = Regexp.union( markers ) # construct a regular expression which will match any of the markers
  if index = (self =~ re)
    self[0, index].rstrip      # slice the string where the regular expression matches, and return it.
  else
    rstrip
  end
end