interface UrlGeneratorInterface

interface UrlGeneratorInterface extends RequestContextAwareInterface {
    
    /**
     * Generates an absolute URL, e.g. "http://example.com/dir/file".
     */
    public const ABSOLUTE_URL = 0;
    
    /**
     * Generates an absolute path, e.g. "/dir/file".
     */
    public const ABSOLUTE_PATH = 1;
    
    /**
     * Generates a relative path based on the current request path, e.g. "../parent-file".
     *
     * @see UrlGenerator::getRelativePath()
     */
    public const RELATIVE_PATH = 2;
    
    /**
     * Generates a network path, e.g. "//example.com/dir/file".
     * Such reference reuses the current scheme but specifies the host.
     */
    public const NETWORK_PATH = 3;
    
    /**
     * Generates a URL or path for a specific route based on the given parameters.
     *
     * Parameters that reference placeholders in the route pattern will substitute them in the
     * path or host. Extra params are added as query string to the URL.
     *
     * When the passed reference type cannot be generated for the route because it requires a different
     * host or scheme than the current one, the method will return a more comprehensive reference
     * that includes the required params. For example, when you call this method with $referenceType = ABSOLUTE_PATH
     * but the route requires the https scheme whereas the current scheme is http, it will instead return an
     * ABSOLUTE_URL with the https scheme and the current host. This makes sure the generated URL matches
     * the route in any case.
     *
     * If there is no route with the given name, the generator must throw the RouteNotFoundException.
     *
     * The special parameter _fragment will be used as the document fragment suffixed to the final URL.
     *
     * @throws RouteNotFoundException              If the named route doesn't exist
     * @throws MissingMandatoryParametersException When some parameters are missing that are mandatory for the route
     * @throws InvalidParameterException           When a parameter value for a placeholder is not correct because
     *                                             it does not match the requirement
     */
    public function generate(string $name, array $parameters = [], int $referenceType = self::ABSOLUTE_PATH) : string;

}