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<?php |
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/** |
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* slince routing library |
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* @author Tao <[email protected]> |
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*/ |
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namespace Slince\Routing; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Slince\Routing\Exception\InvalidArgumentException; |
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class Generator |
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{ |
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/** |
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* The request context |
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* @var ServerRequestInterface |
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*/ |
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protected $request; |
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/** |
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* The variable |
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* @var array |
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*/ |
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protected $lastRouteVariables = []; |
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public function __construct(ServerRequestInterface $request = null) |
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{ |
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$this->request = $request; |
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} |
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/** |
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* Sets the request context |
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* @param ServerRequestInterface $request |
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*/ |
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public function setRequest(ServerRequestInterface $request) |
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{ |
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$this->request = $request; |
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} |
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/** |
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* Gets the request context |
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* @return ServerRequestInterface $context |
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*/ |
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public function getRequest() |
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{ |
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return $this->request; |
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} |
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/** |
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* Generates the url for the route |
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* @param Route $route |
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* @param array $parameters |
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* @param boolean $absolute |
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* @return string |
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*/ |
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public function generate(Route $route, $parameters = [], $absolute = false) |
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{ |
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if ($absolute && !$this->request) { |
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throw new InvalidArgumentException('You must provide a request context to generate the absolute url'); |
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} |
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$urlSlugs = []; |
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//generate absolute url |
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if ($absolute) { |
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$urlSlugs[] = $this->getRouteSchemeAndHost($route); |
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} |
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$urlSlugs[] = $this->getRoutePath($route, $parameters); |
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// Build query string |
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$extraParameters = array_diff_key($parameters, array_flip($this->lastRouteVariables)); |
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if (!empty($extraParameters) && $query = http_build_query($extraParameters, '', '&')) { |
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$urlSlugs[] = '?' . $query; |
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} |
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return implode('', $urlSlugs); |
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} |
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/** |
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* 获取route的scheme和port |
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* @param Route $route |
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* @param array $parameters |
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* @return string |
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*/ |
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protected function getRouteSchemeAndHost(Route $route, array $parameters = []) |
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{ |
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$scheme = $this->request->getUri()->getScheme(); |
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$requiredSchemes = $route->getSchemes(); |
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if (!empty($requiredSchemes) && !in_array($scheme, $requiredSchemes)) { |
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$scheme = $requiredSchemes[0]; |
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} |
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if (!$route->getHost()) { |
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$host = $this->request->getUri()->getHost(); |
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if ($port = $this->request->getUri()->getPort()) { |
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if (strcasecmp($scheme, 'http') == 0 && $port != 80) { |
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$host .= ':' . $this->request->getUri()->getPort(); |
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} elseif (strcasecmp($scheme, 'https') == 0 && $port != 443) { |
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$host .= ':' . $this->request->getUri()->getPort(); |
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} |
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} |
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} else { |
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$host = $this->replaceRouteNamedParameters($route, $route->getHost(), $parameters); |
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} |
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return $scheme . '://' . $host; |
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} |
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/** |
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* Gets the route path |
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* @param Route $route |
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* @param array $parameters |
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* @return string |
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*/ |
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protected function getRoutePath(Route $route, $parameters) |
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{ |
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return $this->replaceRouteNamedParameters($route, $route->getPath(), $parameters); |
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} |
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/** |
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* Replaces the named parameters of the route path or host |
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* @param Route $route |
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* @param string $path |
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* @param array $parameters |
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* @throws InvalidArgumentException |
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* @return string |
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*/ |
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protected function replaceRouteNamedParameters(Route $route, $path, $parameters) |
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{ |
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return preg_replace_callback('#[/\.]?\{([a-zA-Z0-9_,]*)\}#', function ($match) use ($route, $parameters) { |
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$this->lastRouteVariables[] = $match[1]; |
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//The named parameter value must be provided if the route has not the default value fot it |
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if ((!isset($parameters[$match[1]]) || is_null($parameters[$match[1]])) && !$route->hasDefault($match[1])) { |
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throw new InvalidArgumentException(sprintf('Missing parameter "%s"', $match[1])); |
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} |
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$providedValue = isset($parameters[$match[1]]) && !is_null($parameters[$match[1]]) ? |
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$parameters[$match[1]] : $route->getDefault($match[1]); |
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if ($route->hasRequirement($match[1]) |
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&& !preg_match('#^' . $route->getRequirement($match[1]) . '$#', $providedValue) |
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){ |
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$message = sprintf('Parameter "%s" must match "%s" ("%s" given) to generate a corresponding URL.', |
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$match[1], $route->getRequirement($match[1]), $providedValue); |
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throw new InvalidArgumentException($message); |
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} |
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if ($route->getDefault($match[1]) === $providedValue) { |
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return ''; |
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} |
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return str_replace('{' . $match[1] . '}', $providedValue, $match[0]); |
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}, $path); |
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} |
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} |
slince /
routing
