From abf8e39b064edd7be63c3cfd88026fe09c3377d2 Mon Sep 17 00:00:00 2001
From: Gian <47775302+gpunto@users.noreply.github.com>
Date: Thu, 6 Aug 2026 14:31:31 +0200
Subject: [PATCH] Add the thread participant fields sent by the real backend

---
 src/helpers/threads.rb | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/helpers/threads.rb b/src/helpers/threads.rb
index c61d1cc..e7589e9 100644
--- a/src/helpers/threads.rb
+++ b/src/helpers/threads.rb
@@ -1,6 +1,8 @@
 # Builds the thread objects served by the threads query from the tracked messages:
 # every channel message with replies is a thread.
 
+THREAD_PARTICIPANT_APP_PK = 102_398
+
 def query_threads(reply_limit:)
   parents = $message_list.select do |msg|
     msg['parent_id'].nil? && $message_list.any? { |reply| reply['parent_id'] == msg['id'] }
@@ -29,6 +31,23 @@ def build_thread(parent:, reply_limit:)
     'participant_count' => participants.count,
     'reply_count' => replies.count,
     'latest_replies' => replies.last(reply_limit),
-    'thread_participants' => participants.map { |user| { 'user_id' => user['id'], 'user' => user } }
+    'thread_participants' => participants.map { |user| build_thread_participant(parent: parent, user: user, replies: replies) }
+  }
+end
+
+# Mirrors the fields the real backend sends for a thread participant. Clients generated from the
+# OpenAPI spec require app_pk, channel_cid, created_at, last_read_at and custom.
+def build_thread_participant(parent:, user:, replies:)
+  user_replies = replies.select { |reply| reply['user']['id'] == user['id'] }
+  {
+    'app_pk' => THREAD_PARTICIPANT_APP_PK,
+    'channel_cid' => parent['cid'],
+    'thread_id' => parent['id'],
+    'user_id' => user['id'],
+    'user' => user,
+    'created_at' => user_replies.first['created_at'],
+    'last_read_at' => user_replies.last['created_at'],
+    'last_thread_message_at' => user_replies.last['created_at'],
+    'custom' => {}
   }
 end