ircd::m::rooms: Implement matrix-org/matrix-spec-proposals#3827

Author: jevolk

include/ircd/m/rooms.h

@@ -48,6 +48,9 @@ struct ircd::m::rooms::opts
 	/// Room alias prefix search
 	string_view room_alias;
 
+	/// Room type search
+	string_view room_type;
+
 	/// user::rooms convenience
 	id::user user_id;
 

matrix/rooms.cc

@@ -138,6 +138,10 @@ ircd::m::rooms::for_each(const opts &opts,
 			if(!join_rule(room, opts.join_rule))
 				return;
 
+		if(opts.room_type)
+			if(!m::type(room_id, opts.room_type))
+				return;
+
 		if(opts.server && opts.request_node_id && my_host(opts.server))
 			if(!room::aliases(room_id).has_server(opts.server))
 				return;

modules/client/publicrooms.cc

@@ -134,6 +134,7 @@ get__publicrooms(client &client,
 	opts.lower_bound = true;
 	opts.room_id = since;
 	opts.request_user_id = request.user_id;
+	opts.room_type = json::string{filter["room_type"]};
 	if(m::valid(m::id::USER, search_term))
 		opts.user_id = search_term;
 

modules/client/versions.cc

@@ -241,4 +241,13 @@ ircd::m::client_versions::append_unstable_features(client &client,
 			bool(e2ee_forced_trusted_private)
 		}
 	};
+
+	// Supports filtering of /publicRooms by room type as per MSC3827
+	json::stack::member
+	{
+		out, "org.matrix.msc3827.stable", json::value
+		{
+			true
+		}
+	};
 }

modules/federation/publicrooms.cc

@@ -114,6 +114,7 @@ handle_get(client &client,
 	opts.room_id = since;
 	opts.search_term = search_term;
 	opts.request_node_id = request.node_id;
+	opts.room_type = json::string(filter["room_type"]);
 
 	size_t count{0};
 	m::room::id::buf prev_batch_buf;