Integrated user-indication via led

Moped/SwitchMopidy.py

@@ -1,14 +1,40 @@
-#!/usr/bin/python
+#!/usr/bin/python
 
 import glob
 import os
 import subprocess
+import ConfigParser
 
 import RPi.GPIO as GPIO
 
+yellowLed = 15
+redLed = 17
+greenLed = 18
+
 mopidyConf = '/etc/mopidy/mopidy.conf'
 userDir = '/etc/mopidy/conf.user/'
 
+def setLeds(yellow, red, green):
+    GPIO.output(yellowLed, yellow)
+    GPIO.output(redLed, red)
+    GPIO.output(greenLed, green)
+
+def getConfiguredLedColor():
+	config = ConfigParser.ConfigParser()
+	config.read(mopidyConf)
+
+	return config.get('moped-switcher', 'led')
+
+def setConfiguredLedColor():
+	ledColor = getConfiguredLedColor()
+
+	if ledColor == 'yellow':
+		setLeds(1, 0, 0)
+	elif ledColor == 'red':
+		setLeds(0, 1, 0)
+	elif ledColor == 'green':
+		setLeds(0, 0, 1)
+
 def stopMopidy():
     command = ['service', 'mopidy', 'stop']
     subprocess.call(command, shell=False)
@@ -44,9 +70,11 @@ def switchConfig():
 def buttonHandler(channel):
 	print 'Switching to ' + getNextConfig()
 	try:
+		setLeds(0, 0, 0)
 		stopMopidy()
 		switchConfig()
 		startMopidy()
+		setConfiguredLedColor()
 	except OSError as e:
 		print 'Error: ' + e.strerror
 
@@ -55,6 +83,11 @@ if __name__ == '__main__':
 	dummyPin = 15
 
 	GPIO.setmode(GPIO.BCM)
+
+	GPIO.setup(yellowLed, GPIO.OUT)
+	GPIO.setup(redLed, GPIO.OUT)
+	GPIO.setup(greenLed, GPIO.OUT)
+
 	GPIO.setup(buttonPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
 	GPIO.setup(dummyPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)