mpd/mpd_monitor.py

import config
import logging
import paho.mqtt.client as paho
import report
import socket
import subprocess
import time


try:
    from config import APP_NAME as ROOT_LOGGER_NAME
except ImportError:
    ROOT_LOGGER_NAME = 'root'
logger = logging.getLogger(ROOT_LOGGER_NAME).getChild('librespot')


class mpc(object):
    PLAYING_TXT = 'playing'

    def __init__(self, state_callback, title_callback):
        logger.info("Starting MPD monitor...")
        self.__state_callback__ = state_callback
        self.__title_callback__ = title_callback
        self.__state__ = None
        self.__title__ = None
        self.set_state(False)
        self.set_title("")

    def run(self):
        while True:
            output = subprocess.check_output(["mpc", "status"])
            out_txt = output.decode('UTF-8')
            self.set_state(self.PLAYING_TXT in out_txt)
            if self.__state__:
                self.set_title(out_txt.split("\n")[0])
            else:
                self.set_title("")
            time.sleep(.2)

    def set_state(self, target_state):
        if self.__state__ != target_state:
            self.__state__ = target_state
            logger.info('MPD state changed to %s', self.__state__)
            self.__state_callback__(self.__state__)

    def set_title(self, title):
        if self.__title__ != title:
            logger.info('MPD is playing "%s"', title)
            self.__title_callback__(title)
        self.__title__ = title


def send_state_msg_mqtt(state):
    client= paho.Client(config.APP_NAME)
    client.username_pw_set(config.MQTT_USER, config.MQTT_PASS)
    try:
        client.connect(config.MQTT_SERVER, 1883)
        topic = config.MQTT_TOPIC + "/state"
        logger.info("Sending MPD status information to mqtt %s = %s", topic, str(state))
        client.publish(topic, "true" if state else "false")
    except (socket.timeout, OSError) as e:
        logger.warning("Erro while sending mpd state information")


def send_title_msg_mqtt(title):
    client= paho.Client(config.APP_NAME)
    client.username_pw_set(config.MQTT_USER, config.MQTT_PASS)
    try:
        client.connect(config.MQTT_SERVER, 1883)
        topic = config.MQTT_TOPIC + "/title"
        logger.info("Sending MPD title information to mqtt %s = \"%s\"", topic, title)
        client.publish(topic, title)
    except (socket.timeout, OSError) as e:
        logger.warning("Erro while sending mpd title information")


if __name__ == '__main__': 
    report.appLoggingConfigure(config.__BASEPATH__, config.LOGTARGET, ((config.APP_NAME, config.LOGLVL), ), fmt=config.formatter, host=config.LOGHOST, port=config.LOGPORT)
    
    mpd = mpc(send_state_msg_mqtt, send_title_msg_mqtt)
    mpd.run()
import paho.mqtt.client as paho