beets/beetsplug/mpdupdate.py
2013-11-25 22:45:42 -08:00

126 lines
3.8 KiB
Python

# This file is part of beets.
# Copyright 2013, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
"""Updates an MPD index whenever the library is changed.
Put something like the following in your config.yaml to configure:
mpd:
host: localhost
port: 6600
password: seekrit
"""
from __future__ import print_function
from beets.plugins import BeetsPlugin
import os
import socket
from beets import config
# Global variable so that mpdupdate can detect database changes and run only
# once before beets exits.
database_changed = False
# No need to introduce a dependency on an MPD library for such a
# simple use case. Here's a simple socket abstraction to make things
# easier.
class BufferedSocket(object):
"""Socket abstraction that allows reading by line."""
def __init__(self, host, port, sep='\n'):
if host[0] in ['/', '~']:
self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
self.sock.connect(os.path.expanduser(host))
else:
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.sock.connect((host, port))
self.buf = ''
self.sep = sep
def readline(self):
while self.sep not in self.buf:
data = self.sock.recv(1024)
if not data:
break
self.buf += data
if '\n' in self.buf:
res, self.buf = self.buf.split(self.sep, 1)
return res + self.sep
else:
return ''
def send(self, data):
self.sock.send(data)
def close(self):
self.sock.close()
def update_mpd(host='localhost', port=6600, password=None):
"""Sends the "update" command to the MPD server indicated,
possibly authenticating with a password first.
"""
print('Updating MPD database...')
s = BufferedSocket(host, port)
resp = s.readline()
if 'OK MPD' not in resp:
print('MPD connection failed:', repr(resp))
return
if password:
s.send('password "%s"\n' % password)
resp = s.readline()
if 'OK' not in resp:
print('Authentication failed:', repr(resp))
s.send('close\n')
s.close()
return
s.send('update\n')
resp = s.readline()
if 'updating_db' not in resp:
print('Update failed:', repr(resp))
s.send('close\n')
s.close()
print('... updated.')
class MPDUpdatePlugin(BeetsPlugin):
def __init__(self):
super(MPDUpdatePlugin, self).__init__()
config['mpd'].add({
'host': u'localhost',
'port': 6600,
'password': u'',
})
# For backwards compatibility, use any values from the
# plugin-specific "mpdupdate" section.
for key in config['mpd'].keys():
if self.config[key].exists():
config['mpd'][key] = self.config[key].get()
@MPDUpdatePlugin.listen('database_change')
def handle_change(lib=None):
global database_changed
database_changed = True
@MPDUpdatePlugin.listen('cli_exit')
def update(lib=None):
if database_changed or True:
update_mpd(
config['mpd']['host'].get(unicode),
config['mpd']['port'].get(int),
config['mpd']['password'].get(unicode),
)