Fix creating a new file and loading a saved file

Author: yurabakhtin

docs/CHANGELOG.md

@@ -4,6 +4,7 @@ Changelog
 1.1.1 (Unreleased)
 -----------------------
 - Fix #21: Missing icon in Context Menu (File handler)
+- Fix #24: Fix creating a new file and loading a saved file
 
 1.1.0 (August 28, 2025)
 -----------------------

resources/humhub.drawio.js

@@ -39,15 +39,6 @@ humhub.module('drawio', function (module, require, $) {
     Editor.prototype.initEditor = function () {
         var that = this;
 
-        if (typeof drawioEditorFileGuids === 'undefined') {
-            drawioEditorFileGuids = [];
-        }
-        if (drawioEditorFileGuids.indexOf(that.options.fileGuid) !== -1) {
-            // Don't initialize it twice
-            return;
-        }
-        drawioEditorFileGuids.push(that.options.fileGuid);
-
         $(window).on('message', function (e) {
             if ($('[data-ui-widget="drawio.Editor"]').data('file-guid') !== that.options.fileGuid) {
                 // Skip event from editor of another file

widgets/EditorWidget.php

@@ -48,7 +48,7 @@ public function getData()
             'file-guid' => $this->file->guid,
             'file-name' => Html::encode($this->file->fileName),
             'file-extension' => Html::encode(strtolower(FileHelper::getExtension($this->file))),
-            'file-content' => file_get_contents($this->file->store->get()),
+            'file-content' => file_get_contents($this->file->store->get()) ?: null,
             'file-save-url' => Url::to(['/drawio/open/update', 'guid' => $this->file->guid]),
             'user-guid' => ($user) ? Html::encode($user->guid) : '',
             'user-first-name' => ($user) ? Html::encode($user->profile->firstname) : 'Anonymous',