feat(ffi): add Client::is_room_alias_available function

[jmartinesp]

This uses the underlying sdk::Client::resolve_room_alias fn to check if a room alias is available for room creation.

• Public API changes documented in changelogs (optional)

Signed-off-by:

[poljar]

Left some nits, feel free to merge once they are addressed.

[poljar]

Suggested change

	let alias = RoomAliasId::parse(alias)?;
	let alias = RoomAliasId::parse(alias)?;

[poljar]

I think we could improve the naming, to something like alias_exists() or alias_is_reserved().

When you say available it could mean two things:

1. The alias exists and the room can be resolved using this alias.
2. The alias does not exists and it can be created.

[jmartinesp]

If that's the case maybe it's better to modify the existing Client::resolve_room_alias to return Result<Option<ResolvedRoomAlias>>. On Kotlin and Swift I guess the result would be a nullable ResolvedRoomAlias? in a throwing function, so we should be able to handle the 3 states (exists, doesn't exist, something failed).

[poljar]

That sounds like a good idea as well, though I imagine that this method could then be a common helper method that uses Client::resolve_room_alias under the hood and converts the result to a boolean.

[jmartinesp]

I added a couple of commits with the changes above in case you want to do another review.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.88%. Comparing base (494532d) to head (27f5676).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4193   +/-   ##
=======================================
  Coverage   84.87%   84.88%           
=======================================
  Files         272      272           
  Lines       29125    29125           
=======================================
+ Hits        24720    24722    +2     
+ Misses       4405     4403    -2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[poljar]

You might want to use the Breaking: trailer instead of the Changelog trailer since this is a breaking change in one of the commits. Looks good otherwise.