Added a game.user.isFirstGM property

system/scripts/dice/roll-n-keep-dialog.js

@@ -676,7 +676,7 @@ export class RollnKeepDialog extends FormApplication {
 
         // Delete old chat message related to this series
         if (game.settings.get("l5r5e", "rnk-deleteOldMessage")) {
-            if (game.user.isGM) {
+            if (game.user.isFirstGM) {
                 const message = game.messages.get(msgOldId);
                 if (message) {
                     message.delete();

system/scripts/hooks.js

@@ -16,6 +16,13 @@ export default class HooksL5r5e {
      * Do anything once the system is ready
      */
     static async ready() {
+        // If multiple GM connected, tag the 1st alive, useful for some traitements
+        Object.defineProperty(game.user, "isFirstGM", {
+            get: function () {
+                return game.user.isGM && game.user.id === game.users.find((u) => u.active && u.isGM)?.id;
+            },
+        });
+
         // Migration stuff
         if (game.l5r5e.migrations.needUpdate(game.l5r5e.migrations.NEEDED_VERSION)) {
             game.l5r5e.migrations.migrateWorld({ force: false });

system/scripts/migration.js

@@ -24,7 +24,7 @@ export class MigrationL5r5e {
      * @return {Promise<void>} A Promise which resolves once the migration is completed
      */
     static async migrateWorld(options = { force: false }) {
-        if (!game.user.isGM) {
+        if (!game.user.isFirstGM) {
             return;
         }
 

system/scripts/socket-handler.js

@@ -44,9 +44,9 @@ export class SocketHandlerL5r5e {
         });
     }
     _onDeleteChatMessage(data) {
-        // Only delete the message if the user is a GM (otherwise it have no real effect)
+        // Only delete the message if the user is a GM (otherwise it has no real effect)
         // Currently only used in RnK
-        if (!game.user.isGM || !game.settings.get("l5r5e", "rnk-deleteOldMessage")) {
+        if (!game.user.isFirstGM || !game.settings.get("l5r5e", "rnk-deleteOldMessage")) {
             return;
         }
         const message = game.messages.get(data.messageId);