Router.php

<?php

namespace PhpParser;

/**
 * Router class for handling API requests
 * 
 * This class handles routing of API requests to the appropriate handler methods
 * and returns responses in the expected format.
 */
class Router
{
    /**
     * Handle incoming HTTP requests and route to appropriate handlers
     */
    public function handleRequest()
    {
        // Set headers for JSON response
        header('Content-Type: application/json');
        
        // Get request URI and method
        $requestUri = $_SERVER['REQUEST_URI'];
        $requestMethod = $_SERVER['REQUEST_METHOD'];
        
        // Parse URI - remove query string if present
        $uri = parse_url($requestUri, PHP_URL_PATH);
        
        // Route to appropriate handler
        switch ($uri) {
            case '/api/health':
                $this->handleHealthCheck();
                break;
                
            case '/api/parse':
                $this->handleParseRequest();
                break;
                
            default:
                $this->handleNotFound();
                break;
        }
    }
    
    /**
     * Handle health check endpoint
     */
    private function handleHealthCheck()
    {
        http_response_code(200);
        echo json_encode(['status' => 'hello from Php!', 'timestamp' => time()]);
    }
    
    /**
     * Handle code parse request
     */
    private function handleParseRequest()
    {
        // Only accept POST requests for this endpoint
        if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
            http_response_code(405);
            echo json_encode(['error' => 'Method not allowed']);
            return;
        }
        
        // Get request body
        $requestBody = file_get_contents('php://input');
        $requestData = json_decode($requestBody, true);
        
        // Validate request data
        if (!$requestData || !isset($requestData['code']) || 
            !isset($requestData['fileType'])) {
            http_response_code(400);
            echo json_encode(['error' => 'Invalid request data']);
            return;
        }
        
        // Create parser and process code
        try {
            $parser = new CodeParser();
            // Set default empty string for modifiedLines if not provided
            $modifiedLines = '';
            
            $result = $parser->parseCode(
                $requestData['code'],
                $modifiedLines,
                $requestData['fileType']
            );
            
            // Return result with optimized JSON encoding for large files
            http_response_code(200);
            echo json_encode($result, JSON_PARTIAL_OUTPUT_ON_ERROR);
        } catch (\Exception $e) {
            http_response_code(500);
            echo json_encode(['error' => $e->getMessage()]);
        }
    }
    
    /**
     * Handle 404 Not Found response
     */
    private function handleNotFound()
    {
        http_response_code(404);
        echo json_encode(['error' => 'Not found']);
    }
}