require('src/apache_conf_file')

class Janitor

  attr_accessor :apache_vhosts_directory
  
  SECONDS_PER_MINUTE = 60
  MINUTES_PER_HOUR = 60
  HOURS_PER_DAY = 24
  SECONDS_PER_DAY = SECONDS_PER_MINUTE * MINUTES_PER_HOUR * HOURS_PER_DAY
  

  def initialize()
    @apache_vhosts_directory = nil
  end

  
  protected;

  def seconds_to_whole_days(seconds)
    # Given some number of seconds, computer how many
    # entire days are contained in that number of seconds.
    # Fractions of days don't count!

    if (seconds < 0)
      raise(ArgumentException.new('Negative seconds?'))
    end

    return (seconds / SECONDS_PER_DAY).floor
  end
  
  public;
  
  # Get a list of all the temporary directories that
  # we'd like to clean out.
  def get_temporary_directories(remove_duplicates = true)
    temp_dirs = []

    # Get the PHP temp dirs if we've been given a vhosts path
    if !@apache_vhosts_directory.nil? && File.directory?(@apache_vhosts_directory)
      Dir.glob(@apache_vhosts_directory + '/*.conf').each do |conf_file|
        acf = ApacheConfFile.new(conf_file)
        
        # Don't remove the duplicates here since we have
        # to do it afterwards anyway.
        temp_dirs += acf.get_php_temporary_directory_list(false)
      end
    end

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


  def clean_directory(directory, max_age, file_pattern = '*')
    glob_pattern = File.join(directory, file_pattern)

    Dir.glob(glob_pattern).each do |f|
      # Obviously, we should bail if it's not a file.
      next if not File.file?(f)

      # Calculate how old it is
      days_old = seconds_to_whole_days(Time.now - File.mtime(f))

      # And then delete the file (with a notice) if it's too old.
      if days_old > max_age
        puts "Deleting file: #{f} (#{days_old} days old)"
        File.delete(f)
      end
    end
    
  end
end