Cody Cutrer 32909fa237
[homekit] Add support for TV accessory (#14055)
* [homekit] TV accessory

Now possible since we support multiple secondary services. Just need to explicitly
declare that InputSource is a linked service to a Television, not just a secondary
service.

Note also that since TV and related services have so many mandatary characteristics
that are often static, I introduced a new way to declare characteristics -
via metadata on the service's item. Honestly, I feel like it's a lot cleaner to
have a factory create the mandatory characteristics the same way as the optional
characteristics, and then construct the service ourselves instead of basing the
service on the specific accessory interface. But this commit is already big enough,
I didn't want to go refactoring _all_ of the accessories to do it that way just
yet. This is why I have "unused" metadata characteristic factory methods for
AirQuality, HeaterCooler, and Thermostat - I started to make those configurable
via metadata, then realized they were mandatory characteristics that couldn't
be found from metadata via the current infrastructure.

Signed-off-by: Cody Cutrer <cody@cutrer.us>
2023-01-12 15:29:50 +01:00
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