New Discord notification component (#5330)

* Initial commit of discord notification component

* Fixed error where script added extra entries to .coveragerc

* Cleaned up code

* Compliance to PEP8

* removed dependencies

* readded dependencies

* changed name of client id to token for configuration

* Changes for Hound

* Incorporated Review Feedback

* Review feedback

* Updated requirements file

* Check compliance

.coveragerc

@@ -231,6 +231,7 @@ omit =
     homeassistant/components/notify/aws_lambda.py
     homeassistant/components/notify/aws_sns.py
     homeassistant/components/notify/aws_sqs.py
+    homeassistant/components/notify/discord.py
     homeassistant/components/notify/facebook.py
     homeassistant/components/notify/free_mobile.py
     homeassistant/components/notify/gntp.py

homeassistant/components/notify/discord.py

+"""Discord platform for notify component."""
+import logging
+import asyncio
+import voluptuous as vol
+import homeassistant.helpers.config_validation as cv
+from homeassistant.components.notify import (
+    PLATFORM_SCHEMA, BaseNotificationService)
+
+_LOGGER = logging.getLogger(__name__)
+
+REQUIREMENTS = ['discord.py==0.16.0']
+
+CONF_TOKEN = 'token'
+
+PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
+    vol.Required(CONF_TOKEN): cv.string
+})
+
+
+def get_service(hass, config, discovery_info=None):
+    """Get the Discord notification service."""
+    token = config.get(CONF_TOKEN)
+    return DiscordNotificationService(hass, token)
+
+
+class DiscordNotificationService(BaseNotificationService):
+    """Implement the notification service for Discord."""
+
+    def __init__(self, hass, token):
+        """Initialize the service."""
+        self.token = token
+        self.hass = hass
+
+    @asyncio.coroutine
+    def async_send_message(self, message, target):
+        """Login to Discord, send message to channel(s) and log out."""
+        import discord
+        discord_bot = discord.Client(loop=self.hass.loop)
+
+        yield from discord_bot.login(self.token)
+
+        for channelid in target:
+            channel = discord.Object(id=channelid)
+            yield from discord_bot.send_message(channel, message)
+
+        yield from discord_bot.logout()
+        yield from discord_bot.close()
+
+    def send_message(self, message=None, target=None, **kwargs):
+        """Send a message using Discord."""
+        self.hass.async_add_job(self.async_send_message(message, target))

requirements_all.txt

@@ -87,6 +87,9 @@ denonavr==0.3.0
 # homeassistant.components.media_player.directv
 directpy==0.1
 
+# homeassistant.components.notify.discord
+discord.py==0.16.0
+
 # homeassistant.components.updater
 distro==1.0.2