feat(ffi): add room alias format validation

Author: jmartinesp

bindings/matrix-sdk-ffi/src/lib.rs

@@ -30,6 +30,7 @@ mod timeline_event_filter;
 mod tracing;
 mod utils;
 mod widget;
+mod room_alias;
 
 use async_compat::TOKIO1 as RUNTIME;
 use matrix_sdk::ruma::events::room::{

bindings/matrix-sdk-ffi/src/room_alias.rs

@@ -0,0 +1,7 @@
+use ruma::RoomAliasId;
+
+/// Verifies the passed `String` matches the expected room alias format.
+#[matrix_sdk_ffi_macros::export]
+fn is_room_alias_format_valid(alias: String) -> bool {
+    RoomAliasId::parse(alias).is_ok()
+}