From b567fda0aeedde5fc3a9c31efc61f67bb134ad79 Mon Sep 17 00:00:00 2001
From: Mike Johnston <mike@nervesocket.com>
Date: Thu, 29 Jan 2026 02:20:56 -0500
Subject: [PATCH] bugfix

---
 backend/src/routes/challenges.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/backend/src/routes/challenges.js b/backend/src/routes/challenges.js
index e90aa61..095270a 100644
--- a/backend/src/routes/challenges.js
+++ b/backend/src/routes/challenges.js
@@ -185,6 +185,24 @@ router.post('/:id/invite', authMiddleware, asyncHandler(async (req, res) => {
       }
     }
   }
+
+  res.json({ invited: invitedUsers.length });
+}));
+
+// Accept/reject challenge invitation
+router.post('/:id/respond', authMiddleware, asyncHandler(async (req, res) => {
+  const challengeId = req.params.id;
+  const { status } = req.body; // 'accepted' or 'rejected'
+
+  if (!['accepted', 'rejected'].includes(status)) {
+    throw new AppError('Invalid status', 400);
+  }
+
+  await query(
+    'UPDATE challenge_participants SET status = ?, responded_at = NOW() WHERE challenge_id = ? AND user_id = ?',
+    [status, challengeId, req.user.userId]
+  );
+
   // Emit real-time event to challenge participants
   socketEvents.challengeInvitationResponse(challengeId, {
     user_id: req.user.userId,