# A LIRC plugin for Exaile. Depends on pylirc from http://sourceforge.net/projects/pylirc/
# Copyright (C) 2009 Wicher Minnaard, http://smorgasbord.gavagai.nl / wicher@gavagai.eu
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
 
from xl import playlist, player, event
import pylirc, logging
 
LIRCAILE = None
 
def enable(exaile):
    if (exaile.loading):
        event.add_callback(_enable, 'exaile_loaded')
    else:
        _enable(None, exaile, None)
 
def _enable(eventname, exaile, nothing):
  global LIRCAILE
  LIRCAILE = Lircaile(exaile)
 
def disable(exaile):
  pylirc.exit()
 
 
class Lircaile(object):
 
  def polLirc(self):
    """Pops all queued signals off of the LIRC queue and hands them to
    handleCode() for further processing."""
    gopoll = True
    while(gopoll):
      code = (pylirc.nextcode())
      if (code):
        comval = code[0].split()
        if (len(comval) == 1):
          self.handleCode(comval[0])          
        else:
          self.handleCode(comval[0], comval[1])
      else:
        # We're done, the queue is empty.
        gopoll = False
    return True
 
 
  def __init__(self, exaile):
    self.exaile = exaile
    self.logger = logging.getLogger(__name__)
    socket = pylirc.init('lircaile')
    event.EventTimer(0.05, self.polLirc)
 
 
  def handleCode(self, command, *arg):
    """Takes LIRC signals and uses introspection to try to find appropriate 
    exaile functions to call based on the name of the signal. """
    if (command == 'chvol'):
      self.exaile.player.set_volume(self.exaile.player.get_volume() + float(arg[0]))
    else:
      func = None
      # Look for a matching playlist function
      try:
        func = getattr(self.exaile.queue, command)
      except AttributeError:
        # No? Then look for a matching player function
        try:
          func = getattr(self.exaile.player, command)
        except AttributeError:
          # No? Then we're out of options
          self.logger.warning('No function to handle "'+ command +'" LIRC event')
      if callable(func):
        func()