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)
@@ -42,26 +68,33 @@ def switchConfig():
     setConfig(getNextConfig())
     
 def buttonHandler(channel):
-    print 'Switching to ' + getNextConfig()
-    try:
-        stopMopidy()
-        switchConfig()
-        startMopidy()
-    except OSError as e:
-        print 'Error: ' + e.strerror
-    
+	print 'Switching to ' + getNextConfig()
+	try:
+		setLeds(0, 0, 0)
+		stopMopidy()
+		switchConfig()
+		startMopidy()
+		setConfiguredLedColor()
+	except OSError as e:
+		print 'Error: ' + e.strerror
+
 if __name__ == '__main__':
-    buttonPin = 4
-    dummyPin = 15
-    
-    GPIO.setmode(GPIO.BCM)
-    GPIO.setup(buttonPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
-    GPIO.setup(dummyPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+	buttonPin = 4
+	dummyPin = 15
 
-    GPIO.add_event_detect(buttonPin, GPIO.FALLING, callback=buttonHandler, bouncetime=1000)
+	GPIO.setmode(GPIO.BCM)
 
-    try:
-        while True:
-            GPIO.wait_for_edge(dummyPin, GPIO.RISING)
-    finally:
-        GPIO.cleanup()
+	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)
+
+	GPIO.add_event_detect(buttonPin, GPIO.FALLING, callback=buttonHandler, bouncetime=1000)
+
+	try:
+		while True:
+			GPIO.wait_for_edge(dummyPin, GPIO.RISING)
+	finally:
+		GPIO.cleanup()