tinker_tickets/api/update_comment.php

<?php

/**
 * API endpoint for updating a comment
 */

// Disable error display in the output
require_once dirname(__DIR__) . '/helpers/ErrorHandler.php';
ErrorHandler::init();

// Apply rate limiting
require_once dirname(__DIR__) . '/middleware/RateLimitMiddleware.php';
RateLimitMiddleware::apply('api');

// Start output buffering
ob_start();

try {
    require_once dirname(__DIR__) . '/config/config.php';
    require_once dirname(__DIR__) . '/helpers/Database.php';
    require_once dirname(__DIR__) . '/models/CommentModel.php';
    require_once dirname(__DIR__) . '/models/TicketModel.php';
    require_once dirname(__DIR__) . '/models/AuditLogModel.php';

    // Check authentication via session
    if (session_status() === PHP_SESSION_NONE) {
        session_start();
    }
    if (!isset($_SESSION['user']) || !isset($_SESSION['user']['user_id'])) {
        ob_end_clean();
        http_response_code(401);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'error' => 'Authentication required']);
        exit;
    }

    // CSRF Protection for all state-changing methods (any non-GET/HEAD request)
    require_once dirname(__DIR__) . '/middleware/CsrfMiddleware.php';
    if (!in_array($_SERVER['REQUEST_METHOD'], ['GET', 'HEAD'], true)) {
        $csrfToken = $_SERVER['HTTP_X_CSRF_TOKEN'] ?? '';
        if (!CsrfMiddleware::validateToken($csrfToken)) {
            http_response_code(403);
            header('Content-Type: application/json');
            echo json_encode(['success' => false, 'error' => 'Invalid CSRF token']);
            exit;
        }
    }

    $currentUser = $_SESSION['user'];
    $userId = $currentUser['user_id'];
    $isAdmin = $currentUser['is_admin'] ?? false;

    // Use centralized database connection
    $conn = Database::getConnection();

    // Get POST/PUT data
    $data = json_decode(file_get_contents('php://input'), true);

    if (!$data || !isset($data['comment_id']) || !isset($data['comment_text'])) {
        ob_end_clean();
        http_response_code(400);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'error' => 'Missing required fields: comment_id, comment_text']);
        exit;
    }

    $commentId = (int)$data['comment_id'];
    $commentText = trim($data['comment_text']);
    $markdownEnabled = isset($data['markdown_enabled']) && $data['markdown_enabled'];

    if (empty($commentText)) {
        ob_end_clean();
        http_response_code(400);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'error' => 'Comment text cannot be empty']);
        exit;
    }

    // Initialize models
    $commentModel = new CommentModel($conn);
    $auditLog = new AuditLogModel($conn);

    // Verify user can access the parent ticket
    $comment = $commentModel->getCommentById($commentId);
    if ($comment) {
        $ticketModel = new TicketModel($conn);
        $ticket = $ticketModel->getTicketById($comment['ticket_id']);
        if (!$ticket || !$ticketModel->canUserAccessTicket($ticket, $currentUser)) {
            ob_end_clean();
            http_response_code(403);
            header('Content-Type: application/json');
            echo json_encode(['success' => false, 'error' => 'Access denied']);
            exit;
        }
    }

    // Update comment
    $result = $commentModel->updateComment($commentId, $commentText, $markdownEnabled, $userId, $isAdmin);

    // Log the update if successful
    if ($result['success']) {
        $auditLog->log(
            $userId,
            'update',
            'comment',
            (string)$commentId,
            [
                'ticket_id' => $comment['ticket_id'] ?? null,
                'comment_text_preview' => substr($commentText, 0, 100),
            ]
        );
    }

    // Discard any unexpected output
    ob_end_clean();

    header('Content-Type: application/json');
    echo json_encode($result);
} catch (Exception $e) {
    ob_end_clean();
    error_log("Update comment API error: " . $e->getMessage());
    http_response_code(500);
    header('Content-Type: application/json');
    echo json_encode([
        'success' => false,
        'error' => 'An internal error occurred'
    ]);
}