diff options
Diffstat (limited to 'api/chat/poll.php')
| -rw-r--r-- | api/chat/poll.php | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/api/chat/poll.php b/api/chat/poll.php index 601beca..b4aa970 100644 --- a/api/chat/poll.php +++ b/api/chat/poll.php @@ -14,14 +14,21 @@ $all = chat_read($thread); $messages = $since > 0 ? array_values(array_filter($all, fn($m) => (int)($m['epoch'] ?? 0) > $since)) : $all; -$lastAll = $all ? end($all) : null; + +$window = array_slice($messages, -50); +$truncated = count($messages) > count($window); +// The cursor is the last message the client is actually being handed. Returning the +// thread's real tail after a truncation would skip everything in between for good. +$lastSent = $window ? $window[count($window) - 1] : null; +$lastAll = $all ? $all[count($all) - 1] : null; json_response([ 'success' => true, 'thread' => $thread, - 'messages' => array_slice($messages, -50), + 'messages' => $window, + 'truncated' => $truncated, // `awaiting` replaces `unread`: the server keeps no read state, so an unread // counter could never clear. Who spoke last is knowable. 'awaiting' => (bool)($lastAll && ($lastAll['author'] ?? '') !== 'hermes'), - 'cursor' => $lastAll ? (int)($lastAll['epoch'] ?? 0) : 0, + 'cursor' => $lastSent ? (int)($lastSent['epoch'] ?? 0) : ($lastAll ? (int)($lastAll['epoch'] ?? 0) : 0), ]); |