Comments added and methods of class MCGClient reordered
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coderkun
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c2eb40c317
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cd711efa4a
235
mcg.py
235
mcg.py
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@ -1,6 +1,9 @@
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# Author: coderkun <olli@coderkun.de>
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import mpd
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@ -8,17 +11,26 @@ import os
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from hashlib import md5
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from threading import Thread
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class MCGClient:
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"""Client library for handling the connection to the Music Player Daemon.
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This class implements an album-based MPD client.
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It offers a non-blocking threaded worker model for use in graphical
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environments and is based on python-mpd2.
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"""
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# Signal: connect/disconnect event
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SIGNAL_CONNECT = 'connect'
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# Signal: general idle event
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SIGNAL_IDLE = 'idle'
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# Signal: player idle event
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SIGNAL_IDLE_PLAYER = 'idle_player'
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# Signal: update event
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SIGNAL_UPDATE = 'update'
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def __init__(self):
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"""Sets class variables and instantiates the MPDClient.
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"""
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self._connected = False
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self._albums = {}
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self._callbacks = {}
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@ -29,6 +41,9 @@ class MCGClient:
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def connect(self, host="localhost", port="6600", password=None):
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"""Connects to MPD with the given host, port and password or
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with standard values.
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"""
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# TODO als Parameter an _add_action() übergeben, nicht speichern
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self._host = host
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self._port = port
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@ -36,42 +51,22 @@ class MCGClient:
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self._add_action(self._connect)
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def _connect(self):
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try:
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self._client.connect(self._host, self._port)
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if self._password:
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self._client.password(self._password)
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# TODO Verbindung testen
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self._connected = True
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self._callback(self.SIGNAL_CONNECT, self._connected, None)
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self.update()
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self.idle_player()
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except IOError as e:
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self._connected = False
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self._callback(self.SIGNAL_CONNECT, self._connected, e)
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def is_connected(self):
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"""Returns the connection status.
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"""
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return self._connected
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def disconnect(self):
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"""Disconnects from the connected MPD.
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"""
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self._add_action(self._disconnect)
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def _disconnect(self):
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if not self.is_connected():
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return
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try:
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#self._client.close()
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self._client.disconnect()
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except:
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self._client = mpd.MPDClient()
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self._connected = False
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self._callback(self.SIGNAL_CONNECT, self._connected, None)
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def close(self):
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"""Closes the connection and stops properly the worker thread.
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This method is to stop the whole appliction.
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"""
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if not self.is_connected():
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return
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try:
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@ -83,32 +78,81 @@ class MCGClient:
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def update(self):
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"""Updates the album list.
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"""
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self._add_action(self._update)
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def _update(self):
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for song in self._client.listallinfo():
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try:
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if song['album'] not in self._albums:
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album = MCGAlbum(song['artist'], song['album'], song['date'], os.path.dirname(song['file']))
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self._albums[album.get_hash()] = album
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else:
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album = self._albums[MCGAlbum.hash(song['artist'], song['album'])]
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track = MCGTrack(song['title'], song['track'], song['time'], song['file'])
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album.add_track(track)
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except KeyError:
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pass
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# TODO Alben sortieren
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self._callback(self.SIGNAL_UPDATE, self._albums)
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def play(self, album):
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"""Plays the given album.
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"""
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# TODO play()
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# mpd-Befehle: add, play
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# https://github.com/Mic92/python-mpd2/blob/master/mpd.py
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print("play: ", self._albums[album].get_title())
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def connect_signal(self, signal, callback):
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"""Connects a callback function to a signal (event).
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"""
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self._callbacks[signal] = callback
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def _has_callback(self, signal):
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"""Checks if there is a registered callback function for a
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signal.
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"""
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return signal in self._callbacks
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def _callback(self, signal, *args):
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"""Calls the callback function for a signal.
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"""
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if self._has_callback(signal):
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callback = self._callbacks[signal]
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callback(*args)
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def _add_action(self, method):
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"""Adds an action to the action list.
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"""
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self._actions.append(method)
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self._start_worker()
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def _start_worker(self):
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"""Starts the worker thread which waits for action to be
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performed.
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"""
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if self._worker is None or not self._worker.is_alive():
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self._worker = Thread(target=self._work, name='worker', args=())
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self._worker.start()
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else:
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try:
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self._client.noidle()
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except TypeError as e:
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pass
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def _work(self):
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"""Performs the next action or waits for an idle event.
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"""
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while True:
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if self._actions:
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action = self._actions.pop(0)
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action()
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else:
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if not self.is_connected():
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break
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modules = self._client.idle()
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if not self._go:
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break
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self._idle(modules)
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def _idle(self, modules):
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"""Reacts to idle events from MPD.
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"""
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if not modules:
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return
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@ -125,11 +169,59 @@ class MCGClient:
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pass
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def idle_player(self):
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self._add_action(self._idle_player)
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def _connect(self):
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"""Action: Performs the real connect to MPD.
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"""
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try:
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self._client.connect(self._host, self._port)
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if self._password:
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self._client.password(self._password)
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# TODO Verbindung testen
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self._connected = True
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self._callback(self.SIGNAL_CONNECT, self._connected, None)
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self.update()
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self._add_action(self._idle_player)
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except IOError as e:
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self._connected = False
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self._callback(self.SIGNAL_CONNECT, self._connected, e)
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def _disconnect(self):
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"""Action: Performs the real disconnect from MPD.
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"""
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if not self.is_connected():
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return
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try:
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#self._client.close()
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self._client.disconnect()
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except:
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self._client = mpd.MPDClient()
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self._connected = False
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self._callback(self.SIGNAL_CONNECT, self._connected, None)
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def _update(self):
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"""Action: Performs the real update.
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"""
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for song in self._client.listallinfo():
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try:
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if song['album'] not in self._albums:
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album = MCGAlbum(song['artist'], song['album'], song['date'], os.path.dirname(song['file']))
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self._albums[album.get_hash()] = album
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else:
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album = self._albums[MCGAlbum.hash(song['artist'], song['album'])]
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track = MCGTrack(song['title'], song['track'], song['time'], song['file'])
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album.add_track(track)
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except KeyError:
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pass
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# TODO Alben sortieren
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self._callback(self.SIGNAL_UPDATE, self._albums)
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def _idle_player(self):
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"""Reacts on the player idle event.
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"""
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if not self._has_callback(self.SIGNAL_IDLE_PLAYER):
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return
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status = self._client.status()
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@ -140,51 +232,6 @@ class MCGClient:
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def connect_signal(self, signal, callback):
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self._callbacks[signal] = callback
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def _has_callback(self, signal):
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return signal in self._callbacks
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def _callback(self, signal, *args):
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if self._has_callback(signal):
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callback = self._callbacks[signal]
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callback(*args)
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def _add_action(self, method):
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self._actions.append(method)
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self._start_worker()
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def _start_worker(self):
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if self._worker is None or not self._worker.is_alive():
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self._worker = Thread(target=self._work, name='worker', args=())
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self._worker.start()
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else:
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try:
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self._client.noidle()
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except TypeError as e:
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pass
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def _work(self):
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while True:
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if self._actions:
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action = self._actions.pop(0)
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action()
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else:
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if not self.is_connected():
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break
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modules = self._client.idle()
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if not self._go:
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break
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self._idle(modules)
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class MCGAlbum:
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_file_names = ['folder', 'cover']
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@ -1,14 +1,14 @@
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# Author: coderkun <olli@coderkun.de>
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from gi.repository import Gtk, Gdk, GdkPixbuf, GObject
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import mcg
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class MCGGtk(Gtk.Window):
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def __init__(self):
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@ -292,7 +292,6 @@ class ConnectionPanel(Gtk.Box):
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from threading import Thread
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class CoverPanel(Gtk.HPaned):
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SIGNAL_UPDATE_START = 'update-start'
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SIGNAL_UPDATE_END = 'update-end'
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@ -443,6 +442,7 @@ class CoverPanel(Gtk.HPaned):
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import os
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import configparser
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