class ApacheConfFile

  def initialize(conf_file_path)
    if conf_file_path.nil? or not File.file?(conf_file_path)
      raise(ArgumentError.new('How about passing in a real file?'))
    end
    
    # Read each line of the conf file into an array.
    # Apache config directives are all one-line, right?
    @file_lines = []
    
    File::open(conf_file_path) do |f|
      @file_lines = f.readlines()
    end

    if @file_lines.length < 1
      raise(ArgumentError.new('Your file sucks.'))
    end
  end


  
  def get_php_admin_values(directive_name)
    # First, we have to regex-ize the directive name,
    # since they can contain periods (at the least!).
    directive_name.sub!('.', '\.')

    # Our return variable, an array of matching directive values.
    values = []

    # Loop through each line in the conf file looking a
    # matching pattern.
    @file_lines.each do |line|
      matches = line.match(/php_admin_value[[:space:]]+#{directive_name}[[:space:]](.*)$/)
      
      if not matches.nil?
        # If there's a match, there should be only one
        # (in addition to [0], the entire matched string).
        if matches.length > 2
          raise(StandardError.new('Matched the Regex more than once?'))
        end

        # If there's only one, add it to our list.
        # These are probably likely to have some extra
        # whitespace around them one way or another.
        values << matches[1].strip
      end
    end

    return values
  end

  
  def get_php_temporary_directory_list(remove_duplicates = true)
    # Return a list of all PHP "temporary" directories.
    # I.e. upload_tmp_dir, session.save_path
    temp_dirs = []
    temp_dirs += self.get_php_admin_values('upload_tmp_dir')
    temp_dirs += self.get_php_admin_values('session.save_path')

    # We expect these to have been strip()ed already
    if remove_duplicates
      return temp_dirs.uniq
    else
      return temp_dirs
    end
  end
  
end