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<?php |
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namespace Tight; |
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/* |
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* The MIT License |
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* |
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* Copyright 2016 Alejandro Peña Florentín ([email protected]) |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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*/ |
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/** |
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* Route class |
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* |
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* @author Alejandro Peña Florentín ([email protected]) |
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*/ |
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class Route |
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{ |
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const METHOD_GET = "get"; |
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const METHOD_POST = "post"; |
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const METHOD_UPDATE = "update"; |
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const METHOD_DELETE = "delete"; |
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const PARAMETER_CHARACTER = ":"; |
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protected $methods = []; |
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/** |
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* @var array Key-value array of URL parameters |
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*/ |
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protected $params = []; |
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/** |
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* @var array Middleware to be run before only this route instance |
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*/ |
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protected $middleware = []; |
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/** |
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* @var string The route pattern (e.g. "/books/:id") |
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*/ |
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protected $pattern = ""; |
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protected $callable; |
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private $argsPattern = "(\\w+)"; |
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/** |
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* Constructor. |
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* |
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* @param string $pattern Pattern for the route |
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* @param callable $callable Callable to be executed |
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*/ |
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public function __construct($pattern, $callable) { |
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$this->argsPattern = self::PARAMETER_CHARACTER . $this->argsPattern; |
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$this->setPattern($pattern); |
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$this->setCallable($callable); |
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$this->createRegexFromPattern(); |
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} |
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/** |
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* Transforms the pattern to a regular expresion. |
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* This method also catches all the parameters in the pattern |
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*/ |
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private function createRegexFromPattern() { |
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$pattern = $this->getPattern(); |
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$match = []; |
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$pattern = str_replace("/", "\\/", $pattern); |
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if (preg_match_all("/" . $this->argsPattern . "/", $pattern, $match)) { |
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$strings = $match[0]; |
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$parameters = $match[1]; |
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$this->params = $parameters; |
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$pattern = str_replace($strings, str_replace(self::PARAMETER_CHARACTER, "", $this->argsPattern), $pattern); |
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} |
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$this->setPattern("/^" . $pattern . "$/"); |
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} |
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/** |
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* Sets the route pattern |
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* @param string $pattern Route pattern |
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* @return \Tight\Route Fluent setter |
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* @throws \InvalidArgumentException If $pattern is not a string |
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*/ |
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public function setPattern($pattern) { |
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if (!is_string($pattern)) { |
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throw new \InvalidArgumentException('Route name must be a string'); |
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} |
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$this->pattern = $pattern; |
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return $this; |
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} |
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/** |
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* Sets the callable |
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* @param callable $callback Callable to be executed |
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*/ |
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public function setCallable($callback) { |
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if (is_callable($callback)) |
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$this->callable = $callback; |
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} |
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/** |
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* Add supported HTTP method(s) |
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*/ |
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public function setHttpMethods($methods) { |
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$this->methods = $methods; |
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} |
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/** |
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* Get middleware |
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* @return array Array of middleware |
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*/ |
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public function getMiddleware() { |
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return $this->middleware; |
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} |
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/** |
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* Set middleware |
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* |
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* This method allows middleware to be assigned to a specific Route. |
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* If the method argument `is_callable` (including callable arrays!), |
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* we directly append the argument to `$this->middleware`. Else, we |
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* assume the argument is an array of callables and merge the array |
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* with `$this->middleware`. Each middleware is checked for is_callable() |
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* and an InvalidArgumentException is thrown immediately if it isn't. |
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* |
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* @param Callable|array |
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* @return \Tight\Route Fluent setter |
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* @throws \InvalidArgumentException If argument is not callable or not an array of callables. |
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*/ |
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public function setMiddleware($middleware) { |
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if (is_callable($middleware)) { |
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$this->middleware[] = $middleware; |
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} elseif (is_array($middleware)) { |
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foreach ($middleware as $callable) { |
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if (!is_callable($callable)) { |
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throw new \InvalidArgumentException('All Route middleware must be callable'); |
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} |
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} |
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$this->middleware = array_merge($this->middleware, $middleware); |
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} else { |
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throw new \InvalidArgumentException('Route middleware must be callable or an array of callables'); |
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} |
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return $this; |
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} |
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/** |
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* Get supported HTTP methods |
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* @return array HTTP methods |
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*/ |
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public function getHttpMethods() { |
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return $this->methods; |
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} |
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/** |
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* Get the pattern |
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* @return string Pattern |
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*/ |
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public function getPattern() { |
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return $this->pattern; |
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} |
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/** |
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* Append supported HTTP methods |
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*/ |
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public function appendHttpMethods() { |
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$args = func_get_args(); |
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$this->methods = array_merge($this->methods, $args); |
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} |
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/** |
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* Get route parameters |
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* @return array Route parameters |
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*/ |
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public function getParams() { |
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return $this->params; |
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} |
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/** |
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* Checks if an expresion match with this route |
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* @param string $pattern Expresion to be matched |
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* @return boolean TRUE on success |
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*/ |
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public function match($pattern) { |
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$matches = []; |
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if (preg_match_all($this->pattern, $pattern, $matches)) { |
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$params = $this->params; |
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// Remove 1st match, the full string |
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unset($matches[0]); |
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// Fix array index |
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$matches = array_values($matches); |
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// Clear the array parameter |
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$this->params = []; |
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$size = count($params); |
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for ($index = 0; $index < $size; $index++) { |
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$name = $params[$index]; |
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$value = $matches[$index][0]; |
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// Set parameter |
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$this->params[$name] = $value; |
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} |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Dispatch route |
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* |
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* This method invokes the route object's callable. If middleware is |
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* registered for the route, each callable middleware is invoked in |
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* the order specified. |
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* |
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* @return bool |
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*/ |
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public function dispatch() { |
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foreach ($this->middleware as $mw) { |
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call_user_func_array($mw, array($this)); |
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} |
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$return = call_user_func_array($this->callable, array_values($this->getParams())); |
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return $return; |
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} |
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} |
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