"error", "message" => "You must be logged in."]); exit; } $user_id = $_SESSION['user_id']; $selected_user_id = isset($_GET['user_id']) ? intval($_GET['user_id']) : 0; $last_timestamp = isset($_GET['last_timestamp']) ? $_GET['last_timestamp'] : '1970-01-01 00:00:00'; $timeout = 10; // Timeout in seconds $start_time = time(); while (true) { $sql_private_messages = " SELECT pm.message, u.username AS sender, UNIX_TIMESTAMP(pm.sent_at) AS sent_at, pm.file_path FROM private_messages pm JOIN users u ON pm.sender_id = u.id WHERE ((pm.sender_id = ? AND pm.receiver_id = ?) OR (pm.sender_id = ? AND pm.receiver_id = ?)) AND pm.sent_at > ? ORDER BY pm.sent_at ASC"; $stmt_private_messages = $conn->prepare($sql_private_messages); $stmt_private_messages->bind_param("iiiis", $user_id, $selected_user_id, $selected_user_id, $user_id, $last_timestamp); $stmt_private_messages->execute(); $result_private_messages = $stmt_private_messages->get_result(); if ($result_private_messages->num_rows > 0) { $private_messages = []; $latest_timestamp = $last_timestamp; while ($row = $result_private_messages->fetch_assoc()) { $row['message'] = decryptMessage($row['message'], DECRYPTION_KEY); $message_text = htmlspecialchars($row['message']); $output = "

" . htmlspecialchars($row['sender']) . ": " . $message_text; if (!empty($row['file_path'])) { $path = '/projects/strife/uploads/'; $full_file_path = $_SERVER['DOCUMENT_ROOT'] . $path . $row['file_path']; if (file_exists($full_file_path)) { $file_type = mime_content_type($full_file_path); if (strpos($file_type, 'image') !== false) { $output .= "
"; } elseif (strpos($file_type, 'audio') !== false) { $output .= "
"; } elseif (strpos($file_type, 'video') !== false) { $output .= "
"; } else { $output .= "
Unsupported file type: " . htmlspecialchars($file_type); } } else { $output .= "
File does not exist."; } } $output .= " (" . date('Y-m-d H:i:s', $row['sent_at']) . ")

"; $private_messages[] = $output; if ($row['sent_at'] > $latest_timestamp) { $latest_timestamp = date('Y-m-d H:i:s', $row['sent_at']); } } header('Content-Type: application/json'); echo json_encode(['messages' => $private_messages, 'latest_timestamp' => $latest_timestamp]); $stmt_private_messages->close(); $conn->close(); exit; } if (time() - $start_time >= $timeout) { break; } usleep(500000); // Sleep for 0.5 seconds } header('Content-Type: application/json'); echo json_encode(['messages' => [], 'latest_timestamp' => $last_timestamp]); $stmt_private_messages->close(); $conn->close();