Add Environment Canada weather, sensor, and camera platforms

[michaeldavie]

Description: Add platforms for Environment Canada weather data to the weather, sensor, and camera components.

**Related issue (if applicable): N/A

Pull request in home-assistant.io with documentation (if applicable): home-assistant/home-assistant.io#8604

Example entry for configuration.yaml (if applicable):

weather:
  - platform: environment_canada
sensor:
  - platform: environment_canada
camera:
  - platform: environment_canada

Checklist:

• The code change is tested and works locally. See the thread at https://community.home-assistant.io/t/reviewers-needed-environment-canada-component-with-weather-sensor-and-camera-radar-platforms/59561
• Local tests pass with tox. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• New dependencies have been added to the REQUIREMENTS variable (example).
• New dependencies are only imported inside functions that use them (example).
• New or updated dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.
• New files were added to .coveragerc.

If the code does not interact with devices:

• Tests have been added to verify that the new code works.

[MatthewFlamm]

It looks like you are taking a day+night forecast and chopping out the night time piece except for the low temperature to fit within the current component choices of daily or hourly. I am working on allowing a day+night mode in the front end for my own in-progress platform. I can submit a PR for this piece now if it helps here.

See here for what my proposal is
home-assistant/architecture#75 (comment)

Also, as with every other weather platform I've looked at, this one will only show correct values in one unit system, I assume metric.

[michaeldavie]

Yes, I'm only using the high and low temperatures. There is a lot more data available, but I fit it into the existing UI. You're correct that I'm only presenting the data in metric; that's the standard in Canada and is the only way the data is published.

[MatthewFlamm]

I think at the very least this needs to be an explicit limitation in the documentation if imperial units won't be supported.

[michaeldavie]

I tested it in imperial mode, and it does present the temperatures correctly in ºF. It doesn't look like the weather component supports units or conversions for the other types of data (i.e. wind speed, pressure, and visibility).

[michaeldavie]

I've had a few users testing things out (see https://community.home-assistant.io/t/reviewers-needed-environment-canada-component-with-weather-sensor-and-camera-radar-platforms/59561), and I decided to merge the weather, sensor, and camera platforms under this PR. Things are running quite smoothly, and I'd like to get this merged in 0.90 if possible. Please let me know if you have any questions or concerns.

[davidbb]

I've been testing this platform as a custom component on 0.88 and 0.89 without issues. This platform follows the style of other national weather service platforms.

Canadian Home Assistant users will be pleased to see the integration of official weather data. 🇨🇦 Thanks for the hard work @michaeldavie

[glassbase]

Great work on this. Been using since your first pull request back last year...

I think you should drop the EC from the name in sensors.py. Most people are probably only following one weather platform so distinguishing with EC in name does not make sense (to me anyways).

[michaeldavie]

@balloob, would it be possible to get this merged? It's running stably with quite a few users, and the documentation has been brought up to date. Please let me know if there's anything else I need to do. Thanks in advance for your help.