Camera services arm disarm including Netgear Arlo (#7961)

* Added camera service calls to arm/disarm the cameras. Entity id is optional so that with a single call we can arm all the cameras or specify a particular entity id to arm if applicable and possible in that camera type.

* Added camera service calls to arm/disarm the cameras. Entity id is optional so that with a single call we can arm all the cameras or specify a particular entity id to arm if applicable and possible in that camera type.

* Added camera service calls to arm/disarm the cameras. Entity id is optional so that with a single call we can arm all the cameras or specify a particular entity id to arm if applicable and possible in that camera type.

* Fixed the spaces and indentation related issues that houndci found

* Fixed the spaces and indentation related issues that houndci found

* Missed the const file which has the macros defined.

* Fixed the CI build error

* Fixed the CI build error because of unused variable in exception case

* Updating the arlo code based on comment from @balloob. Changed the arm and disarm to enable_motion_detection and disable_motion_detection respectively. Similarly fixed the AttributeError handling. Added dummy code to the demo camera also. Moved out the definitions in const.py into the camera __init__ file

* Fixed the comments posted by houndci-bot

* Fixed the comments posted by houndci-bot

* Fixed the comments posted by houndci-bot

* Fixed the comments posted by travis-ci integration bot

* Fixed the comments posted by travis-ci integration bot

* Fixed the comments posted by travis-ci integration bot for demo.py: expected 2 lines, found 1

* Updated code in camera __init__.py to use the get function instead of directly calling the member in the structure.

* Updated code in camera __init__.py

* Posting the updated code for PR based on @balloob's suggestions/recommendations

* Removed the arlo reference from demo code. Copy-paste error

* Removed the unused import found by hound bot

* Expected 2 lines before function, but found only 1.

* Based on @balloob's comments, moved these constants to the camera/arlo.py

* Added test_demo.py to test the motion enabled and motion disabled in camera component

* Fixing issues found by houndci-bot

* Fixing issues found by houndci-bot

* Fixing the code as per @balloob's suggestions

* Fixing the code as per @balloob's suggestions

* Fixing the test_demo failure. Tried to rewrite a base function to enable the motion in __init__.py and missed to add it to as a job.

* Fixing the hound bot comment

* Update arlo.py

* Update arlo.py

homeassistant/components/camera/demo.py

@@ -5,25 +5,29 @@ For more details about this platform, please refer to the documentation
 https://home-assistant.io/components/demo/
 """
 import os
-
+import logging
 import homeassistant.util.dt as dt_util
 from homeassistant.components.camera import Camera
 
+_LOGGER = logging.getLogger(__name__)
+
 
 def setup_platform(hass, config, add_devices, discovery_info=None):
     """Set up the Demo camera platform."""
     add_devices([
-        DemoCamera('Demo camera')
+        DemoCamera(hass, config, 'Demo camera')
     ])
 
 
 class DemoCamera(Camera):
     """The representation of a Demo camera."""
 
-    def __init__(self, name):
+    def __init__(self, hass, config, name):
         """Initialize demo camera component."""
         super().__init__()
+        self._parent = hass
         self._name = name
+        self._motion_status = False
 
     def camera_image(self):
         """Return a faked still image response."""
@@ -38,3 +42,21 @@ class DemoCamera(Camera):
     def name(self):
         """Return the name of this camera."""
         return self._name
+
+    @property
+    def should_poll(self):
+        """Camera should poll periodically."""
+        return True
+
+    @property
+    def motion_detection_enabled(self):
+        """Camera Motion Detection Status."""
+        return self._motion_status
+
+    def enable_motion_detection(self):
+        """Enable the Motion detection in base station (Arm)."""
+        self._motion_status = True
+
+    def disable_motion_detection(self):
+        """Disable the motion detection in base station (Disarm)."""
+        self._motion_status = False