transliterate special chars better

launch.html

@@ -1373,6 +1373,52 @@
         }, CONFIG.launchTimeout);
       }
 
+      /* ============================================================
+       * ROOM NAME
+       * ============================================================
+       */
+
+      /*
+       * Sonderzeichen in das nächstliegende ASCII-Zeichen
+       * umwandeln.
+       *
+       * Beispiel:
+       *
+       * "Grundstück" ergibt "Grundstueck"
+       * "François" ergibt "Francois"
+       */
+      function transliterate(text) {
+        const extras = {
+          "ß": "ss",
+          "ẞ": "ss",
+          "æ": "ae",
+          "Æ": "ae",
+          "œ": "oe",
+          "Œ": "oe",
+          "ø": "o",
+          "Ø": "o"
+        };
+
+        return text
+          .normalize("NFD")
+          .replace(/[\u0300-\u036f]/g, "")
+          .replace(/[ßẞæÆœŒøØ]/g, (char) => extras[char]);
+      }
+
+      /*
+       * Aus dem Meeting-Namen einen gültigen Room-Namen ableiten.
+       *
+       * Beispiel:
+       *
+       * "Grund Stück Planung" ergibt "grund-stuck-planung"
+       */
+      function createRoomName(meetingName) {
+        return transliterate(meetingName)
+          .toLowerCase()
+          .replace(/\s+/g, "-")
+          .replace(/[^a-z0-9-]/g, "");
+      }
+
       /* ============================================================
        * ICS FILE GENERATION
        * ============================================================
@@ -1380,7 +1426,7 @@
 
       function generateICS(meetingName, description, startTime, endTime, organizer) {
         /* Generate a unique room name from the meeting name */
-        const roomName = meetingName.toLowerCase().replace(/\s+/g, '-').replace(/[^a-z0-9-]/g, '');
+        const roomName = createRoomName(meetingName);
         const meetingUrl = `https://${CONFIG.jitsiLauncher}/launch.html?room=${encodeURIComponent(roomName)}`;
         
         /* Format dates for ICS */
@@ -1525,7 +1571,7 @@ END:VCALENDAR`;
           return;
         }
 
-        if (!ROOM_PATTERN.test(meetingName)) {
+        if (!ROOM_PATTERN.test(createRoomName(meetingName))) {
           alert(getTranslation('creator.meetingNameInvalid') || 'Meeting name may only contain letters, numbers and hyphens');
           return;
         }