Function receiveLobbiesMessage

Extensions/Multiplayer/multiplayertools.ts:1517–1565

(
      runtimeScene: gdjs.RuntimeScene,
      event: MessageEvent,
      { checkOrigin }: { checkOrigin: boolean }
    )

     * react accordingly.
     */
    const receiveLobbiesMessage = function (
      runtimeScene: gdjs.RuntimeScene,
      event: MessageEvent,
      { checkOrigin }: { checkOrigin: boolean }
    ) {
      const allowedOrigins = ['https://gd.games', 'http://localhost:4000'];

      // Check origin of message.
      if (checkOrigin && !allowedOrigins.includes(event.origin)) {
        // Wrong origin. Return silently.
        return;
      }
      // Check that message is not malformed.
      if (!event.data.id) {
        throw new Error('Malformed message');
      }

      // Handle message.
      switch (event.data.id) {
        case 'lobbiesListenerReady': {
          sendSessionInformation(runtimeScene);
          break;
        }
        case 'joinLobby': {
          if (!event.data.lobbyId) {
            throw new Error('Malformed message.');
          }
          _actionAfterJoiningLobby = null;
          handleJoinLobbyEvent(runtimeScene, event.data.lobbyId);
          break;
        }
        case 'startGameCountdown': {
          handleStartGameCountdownMessage();
          break;
        }
        case 'startGame': {
          handleStartGameMessage();
          break;
        }
        case 'leaveLobby': {
          handleLeaveLobbyEvent();
          break;
        }
        case 'joinGame': {
          handleJoinGameMessage();
          break;
        }
      }
    };

    /**
     * Handle any error that can occur as part of displaying the lobbies.