class ImageOptimizer

# File lib/image_optimizer.rb, line 22
def initialize(path, options = {})
  @path    = path
  @options = options
end

# File lib/image_optimizer.rb, line 14
def self.quiet
  @@quiet
end

# File lib/image_optimizer.rb, line 17
def self.quiet=(value)
  @@quiet = value
end

# File lib/image_optimizer.rb, line 27
def optimize
  identify_format if options[:identify]
  JPEGOptimizer.new(path, options).optimize
  PNGOptimizer.new(path, options).optimize
  PNGQuantOptimizer.new(path, options).optimize
  GIFOptimizer.new(path, options).optimize
end

# File lib/image_optimizer.rb, line 60
def identify_bin
  ENV['IDENTIFY_BIN'] || which('identify')
end

# File lib/image_optimizer.rb, line 56
def identify_bin?
  !!identify_bin
end

# File lib/image_optimizer.rb, line 37
def identify_format
  if identify_bin?
    match = run_command("#{identify_bin} -ping#{quiet} #{path}").match(/PNG|JPG|TIFF|GIF|JPEG/)
    if match
      options[:identified_format] = match[0].downcase
    end
  else
    warn 'Attempting to retrieve image format without identify installed. Using file name extension instead...'
  end
end

# File lib/image_optimizer.rb, line 52
def image_magick?
  !!which('mogrify')
end

# File lib/image_optimizer.rb, line 48
def quiet
  ' -quiet' if image_magick?
end