113 lines
2.5 KiB
PHP
113 lines
2.5 KiB
PHP
<?php namespace System;
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class Router {
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/**
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* All of the loaded routes.
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*
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* @var array
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*/
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public static $routes;
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/**
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* Search a set of routes for the route matching a method and URI.
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*
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* @param string $method
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* @param string $uri
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* @return Route
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*/
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public static function route($method, $uri)
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{
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// Prepend a forward slash since all routes begin with one.
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$uri = ($uri != '/') ? '/'.$uri : $uri;
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if (is_null(static::$routes))
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{
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static::$routes = static::load($uri);
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}
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// Is there an exact match for the request?
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if (isset(static::$routes[$method.' '.$uri]))
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{
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return Request::$route = new Route($method.' '.$uri, static::$routes[$method.' '.$uri]);
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}
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foreach (static::$routes as $keys => $callback)
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{
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// Only check routes that have multiple URIs or wildcards. All other routes would have
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// been caught by a literal match.
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if (strpos($keys, '(') !== false or strpos($keys, ',') !== false )
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{
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foreach (explode(', ', $keys) as $key)
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{
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$key = str_replace(':num', '[0-9]+', str_replace(':any', '[a-zA-Z0-9\-_]+', $key));
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if (preg_match('#^'.$key.'$#', $method.' '.$uri))
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{
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return Request::$route = new Route($keys, $callback, static::parameters(explode('/', $uri), explode('/', $key)));
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}
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}
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}
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}
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}
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/**
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* Load the appropriate route file for the request URI.
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*
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* @param string $uri
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* @return array
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*/
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private static function load($uri)
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{
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if ( ! is_dir(APP_PATH.'routes'))
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{
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return require APP_PATH.'routes'.EXT;
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}
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if ( ! file_exists(APP_PATH.'routes/home'.EXT))
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{
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throw new \Exception("A [home] route file is required when using a route directory.");
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}
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if ($uri == '/')
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{
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return require APP_PATH.'routes/home'.EXT;
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}
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else
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{
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$segments = explode('/', trim($uri, '/'));
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if ( ! file_exists(APP_PATH.'routes/'.$segments[0].EXT))
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{
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return require APP_PATH.'routes/home'.EXT;
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}
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return array_merge(require APP_PATH.'routes/'.$segments[0].EXT, require APP_PATH.'routes/home'.EXT);
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}
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}
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/**
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* Extract the parameters from a URI based on a route URI.
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*
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* Any route segment wrapped in parentheses is considered a parameter.
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*
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* @param array $uri
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* @param array $route
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* @return array
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*/
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private static function parameters($uri, $route)
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{
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$parameters = array();
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for ($i = 0; $i < count($route); $i++)
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{
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if (strpos($route[$i], '(') === 0)
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{
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$parameters[] = $uri[$i];
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}
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}
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return $parameters;
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}
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} |