feat: Whiteboard Badge - Punkt bei neuen Änderungen/Teilen

backend/src/tools/whiteboard/routes.js

@@ -25,11 +25,41 @@ const router  = express.Router();
       role          TEXT    NOT NULL DEFAULT 'edit',
       UNIQUE(whiteboard_id, user_id)
     );
+    CREATE TABLE IF NOT EXISTS whiteboard_unread (
+      whiteboard_id INTEGER NOT NULL,
+      user_id       INTEGER NOT NULL,
+      reason        TEXT    NOT NULL DEFAULT 'updated',
+      created_at    TEXT    NOT NULL DEFAULT (datetime('now','localtime')),
+      PRIMARY KEY (whiteboard_id, user_id)
+    );
   `);
 })();
 
 const uid = req => req.user.id;
 
+function getAccessUsers(whiteboardId, exceptUserId) {
+  const wb = db.prepare('SELECT owner_id FROM whiteboards WHERE id=?').get(whiteboardId);
+  if (!wb) return [];
+  const users = new Set();
+  if (wb.owner_id !== exceptUserId) users.add(wb.owner_id);
+  const perms = db.prepare('SELECT user_id FROM whiteboard_permissions WHERE whiteboard_id=?').all(whiteboardId);
+  for (const p of perms) if (p.user_id !== exceptUserId) users.add(p.user_id);
+  return [...users];
+}
+
+function markUnread(whiteboardId, userIds, reason = 'updated') {
+  const upsert = db.prepare(`
+    INSERT INTO whiteboard_unread (whiteboard_id, user_id, reason, created_at)
+    VALUES (?, ?, ?, datetime('now','localtime'))
+    ON CONFLICT(whiteboard_id, user_id) DO UPDATE SET reason=excluded.reason, created_at=excluded.created_at
+  `);
+  for (const u of userIds) upsert.run(whiteboardId, u, reason);
+}
+
+function markRead(whiteboardId, userId) {
+  db.prepare('DELETE FROM whiteboard_unread WHERE whiteboard_id=? AND user_id=?').run(whiteboardId, userId);
+}
+
 // Hilfsfunktion: Hat User Zugriff? Gibt 'owner'|'edit'|'view'|null zurück
 function access(whiteboardId, userId) {
   const wb = db.prepare('SELECT owner_id FROM whiteboards WHERE id=?').get(whiteboardId);
@@ -39,6 +69,13 @@ function access(whiteboardId, userId) {
   return perm?.role || null;
 }
 
+// ── Unread count ──────────────────────────────────────────────────────────────
+router.get('/unread', authenticate, (req, res) => {
+  const me = uid(req);
+  const { count } = db.prepare('SELECT COUNT(*) as count FROM whiteboard_unread WHERE user_id=?').get(me);
+  res.json({ count });
+});
+
 // ── Liste ─────────────────────────────────────────────────────────────────────
 router.get('/', authenticate, (req, res) => {
   const me = uid(req);
@@ -100,6 +137,7 @@ router.get('/:id/data', authenticate, (req, res) => {
     JOIN users u ON u.id=p.user_id WHERE p.whiteboard_id=?
   `).all(req.params.id);
   const owner = db.prepare('SELECT username FROM users WHERE id=?').get(wb.owner_id);
+  markRead(req.params.id, me);
   res.json({ ...data, role, title: wb.title, owner: owner.username, permissions: perms });
 });
 
@@ -123,12 +161,10 @@ router.post('/:id/save', authenticate, async (req, res) => {
     const message = `${saver?.username || 'Jemand'} hat das Whiteboard "${wb?.title || ''}" gespeichert.`;
 
     // Alle User mit Zugriff: Owner + alle Permissions — außer dem Speichernden selbst
-    const notify = [];
-    if (wb && wb.owner_id !== me) notify.push(wb.owner_id);
-    const perms = db.prepare('SELECT user_id FROM whiteboard_permissions WHERE whiteboard_id=?').all(req.params.id);
-    for (const p of perms) { if (p.user_id !== me) notify.push(p.user_id); }
+    const notify = getAccessUsers(req.params.id, me);
+    markUnread(req.params.id, notify, 'updated');
 
-    for (const userId of [...new Set(notify)]) {
+    for (const userId of notify) {
       const poCfg = db.prepare('SELECT user_key, app_token FROM pushover_settings WHERE user_id=?').get(userId);
       if (!poCfg?.app_token || !poCfg?.user_key) continue;
       fetch('https://api.pushover.net/1/messages.json', {
@@ -175,9 +211,10 @@ router.put('/:id/permissions', authenticate, async (req, res) => {
     }
   })();
 
-  // Pushover an neu hinzugekommene User (fire & forget)
   const owner = db.prepare('SELECT username FROM users WHERE id=?').get(me);
   const newlyAdded = permissions.filter(p => p.role && p.role !== 'none' && !before.includes(p.user_id));
+  if (newlyAdded.length) markUnread(req.params.id, newlyAdded.map(p => p.user_id), 'shared');
+
   for (const p of newlyAdded) {
     try {
       const poCfg = db.prepare('SELECT user_key, app_token FROM pushover_settings WHERE user_id=?').get(p.user_id);