Started refactoring into multiple files

camera.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python
+# Created by br@re-web.eu, 2015
+
+import subprocess
+
+class CameraException(Exception):
+    """Custom exception class to handle camera class errors"""
+    pass
+
+class Camera_gPhoto:
+    """Camera class providing functionality to take pictures using gPhoto 2"""
+
+    def __init__(self):
+        # Print the abilities of the connected camera
+        print(self.call_gphoto("-a", "/dev/null"))
+
+    def call_gphoto(self, action, filename):
+        # Try to run the command
+        try:
+            cmd = "gphoto2 --force-overwrite --quiet " + action + " --filename " + filename
+            output = subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
+            if "ERROR" in output:
+                raise subprocess.CalledProcessError(returncode=0, cmd=cmd, output=output)
+        except subprocess.CalledProcessError as e:
+            if "Canon EOS Capture failed: 2019" in e.output:
+                raise CameraException("Can't focus! Move and try again!")
+            elif "No camera found" in e.output:
+                raise CameraException("No (supported) camera detected!")
+            else:
+                raise CameraException("Unknown error!\n" + '\n'.join(e.output.split('\n')[1:3]))
+        return output
+
+    def take_picture(self, filename="/tmp/picture.jpg"):
+        self.call_gphoto("--capture-image-and-download", filename)
+        return filename