Add new launch sensor to keep track of space launches.

[ludeeus]

Description:

Adda a new sensor to show the next upcoming space launch 🚀

Pull request in home-assistant.io with documentation (if applicable): home-assistant/home-assistant.io#7397

Example entry for configuration.yaml (if applicable):

sensor:
  platform: launch

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass

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.

[fabaff]

I think that we should throttle the sensor by default. Maybe something like 10 or 15 min. The data is pretty static and there seems to be no need to poll with the default interval.

[ludeeus]

I will add that @fabaff and also make the package reuse the aiohttp session from homeassistant as mentioned here: #18237 (comment)

[balloob]

10 or 15 minutes? What about 24 hours? This is very static info…

[ludeeus]

Some days have multiple launches, my plan was to set it to 1-hour intervals

[amelchio]

I guess the launch_time could be used for some custom polling? Maybe not worth it ...

[MartinHjelmare]

Just some style things.

[amelchio]

I think this is ready to fly!

[balloob]

Soo, would people agree that this name is a bit too generic ?

[balloob]

I would think that launch_library would be a better name, as it reflects the name of the service.

[ludeeus]

@balloob I do not disagree with that do you want me to make a PR to change it?

[balloob]

Yes let's do it to before it is released

[ludeeus]

I'll start that now :)

[HemiBob]

I would like to build a countdown sensor and it would be very useful if this launch sensor had an attribute based on the "wsstamp" field. IE the unix formatted window start time.
Then it would be a simple matter to subtract the timestamp now() value and convert to days, hours. minutes etc.

[frenck]

@HemiBob Please don't use closed/merged pull requests for seeking help/support/feature requests.

For the right place see: https://www.home-assistant.io/help