class FileInfo

# File lib/file_info.rb, line 55
def self.load(filename)
  raise ArgumentError, "File '#{filename}' does not exist." if !File.exists? filename
  new `file --mime --brief #{Shellwords.escape(filename)}`
end

# File lib/file_info.rb, line 17
def initialize(output)
  @content_type = output.strip
end

# File lib/file_info.rb, line 60
def self.parse(content)
  file = Tempfile.new(rand.to_s, encoding: Encoding::ASCII_8BIT)
  file.write(content)
  file.rewind
  new `file --mime --brief #{file.path}`
ensure
  file.close
  file.unlink
end

# File lib/file_info.rb, line 45
def charset
  @charset ||= (matches = content_type.match(CHARSET_REGEX)) ? matches[1] : 'binary'
end

# File lib/file_info.rb, line 49
def encoding
  @encoding ||= ::Encoding.find(charset)
rescue ArgumentError => e
  raise UnknownEncodingError, e.message
end

# File lib/file_info.rb, line 28
def media_type
  @media_type ||= type.split('/')[0]
end

# File lib/file_info.rb, line 36
def mime_type
  @mime_type ||= begin
    require 'mime/types' unless defined? MIME::Types
    MIME::Types[type][0]
  rescue LoadError
    raise LoadError, MIME_TYPE_ERROR_MESSAGE
  end
end

# File lib/file_info.rb, line 32
def sub_type
  @sub_type ||= type.split('/')[1]
end

# File lib/file_info.rb, line 21
def type
  @type ||= begin
    match = content_type.match(MIME_TYPE_REGEX)
    match ? match[0] : DEFAULT_MIME_TYPE
  end
end