103 lines
2.3 KiB
Python
103 lines
2.3 KiB
Python
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#!/usr/bin/python
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import glob
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import os
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import subprocess
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import ConfigParser
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import RPi.GPIO as GPIO
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yellowLed = 15
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redLed = 17
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greenLed = 18
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buttonPin = 27
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dummyPin = 1
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mopidyConf = '/etc/mopidy/mopidy.conf'
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userDir = '/etc/mopidy/conf.user/'
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def setLeds(yellow, red, green):
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GPIO.output(yellowLed, yellow)
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GPIO.output(redLed, red)
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GPIO.output(greenLed, green)
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def getConfiguredLedColor():
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config = ConfigParser.ConfigParser()
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config.read(mopidyConf)
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return config.get('moped-switcher', 'led')
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def setConfiguredLedColor():
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ledColor = getConfiguredLedColor()
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if ledColor == 'yellow':
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setLeds(1, 0, 0)
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elif ledColor == 'red':
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setLeds(0, 1, 0)
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elif ledColor == 'green':
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setLeds(0, 0, 1)
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def stopMopidy():
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command = ['service', 'mopidy', 'stop']
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subprocess.call(command, shell=False)
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def startMopidy():
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command = ['service', 'mopidy', 'start']
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subprocess.call(command, shell=False)
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def getConfigs():
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return sorted(glob.glob(os.path.join(userDir, '*.conf')))
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def getCurrentConfig():
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if os.path.islink(mopidyConf):
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return os.path.realpath(mopidyConf)
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else:
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return None
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def getNextConfig():
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currentConfig = getCurrentConfig()
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availableConfigs = getConfigs()
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currentIndex = availableConfigs.index(currentConfig)
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nextIndex = (currentIndex + 1) % len(availableConfigs)
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return availableConfigs[nextIndex]
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def setConfig(newConfig):
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if os.path.islink(mopidyConf) and os.path.isfile(newConfig):
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os.unlink(mopidyConf)
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os.symlink(newConfig, mopidyConf)
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def switchConfig():
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setConfig(getNextConfig())
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def buttonHandler(channel):
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print 'Switching to ' + getNextConfig()
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try:
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setLeds(0, 0, 0)
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stopMopidy()
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switchConfig()
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startMopidy()
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setConfiguredLedColor()
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except OSError as e:
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print 'Error: ' + e.strerror
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if __name__ == '__main__':
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GPIO.setmode(GPIO.BCM)
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GPIO.setup(yellowLed, GPIO.OUT)
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GPIO.setup(redLed, GPIO.OUT)
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GPIO.setup(greenLed, GPIO.OUT)
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GPIO.setup(buttonPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
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GPIO.setup(dummyPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
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GPIO.add_event_detect(buttonPin, GPIO.FALLING, callback=buttonHandler, bouncetime=1000)
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setConfiguredLedColor()
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try:
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while True:
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GPIO.wait_for_edge(dummyPin, GPIO.RISING)
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finally:
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GPIO.cleanup()
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