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<?php /** MicroRouter */ |
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namespace Micro\Web; |
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/** |
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* Router class file. |
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* |
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* Routing user requests |
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* |
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* @author Oleg Lunegov <[email protected]> |
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* @link https://github.com/linpax/microphp-framework |
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* @copyright Copyright (c) 2013 Oleg Lunegov |
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* @license https://github.com/linpax/microphp-framework/blob/master/LICENSE |
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* @package Micro |
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* @subpackage Web |
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* @version 1.0 |
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* @since 1.0 |
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*/ |
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class Router implements IRouter |
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{ |
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/** @var array $routes routes for routing */ |
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public $routes = []; |
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/** |
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* Construct for route scanner |
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* |
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* @access public |
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* |
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* @param array $routes |
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* |
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* @result void |
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*/ |
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public function __construct(array $routes = []) |
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{ |
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$this->routes = $routes; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function parse($uri, $method = 'GET') |
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{ |
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// default path |
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if ($uri === '/' || $uri === '' || $uri === '/default') { |
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return '/default'; |
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} |
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// scan routes |
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foreach ($this->routes as $condition => $config) { |
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if (is_array($config) && !empty($config['route'])) { |
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if (!empty($config['verb']) && ($config['verb'] !== $method)) { |
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continue; |
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} |
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$replacement = $config['route']; |
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} elseif (is_string($config)) { |
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$replacement = $config; |
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} else { |
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continue; |
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} |
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// slice path |
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if ($uri === $condition) { |
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return $replacement; |
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} |
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// pattern path |
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if ($validated = $this->validatedRule($uri, $condition, $replacement)) { |
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return $validated; |
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} |
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} |
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// return raw uri |
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return $uri; |
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} |
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/** |
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* Validated router rule |
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* |
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* @access private |
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* |
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* @param string $uri uri to validation |
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* @param string $pattern checking pattern |
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* @param string $replacement replacement for pattern |
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* |
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* @return string |
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*/ |
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private function validatedRule($uri, $pattern, $replacement) |
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{ |
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$uriBlocks = explode('/', trim($uri, '/')); |
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$patBlocks = explode('/', trim($pattern, '/')); |
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$repBlocks = explode('/', trim($replacement, '/')); |
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if (count($uriBlocks) !== count($patBlocks)) { |
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return false; |
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} |
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$attributes = $this->parseUri($uriBlocks, $patBlocks); |
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if (!$attributes) { |
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return false; |
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} |
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$result = $this->buildResult($attributes, $repBlocks); |
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if ($result === null || $result === false) { |
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return false; |
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} |
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if (!$attributes) { |
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return $result; |
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} |
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$result .= '?'; |
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foreach ($attributes AS $key => $val) { |
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if ($key !== $val) { |
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$result .= '&'.$key.'='.$val; |
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} |
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} |
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return $result; |
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} |
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/** |
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* Match patBlocks in uriBlocks |
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* |
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* @access private |
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* |
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* @param array $uriBlocks uri blocks from URL |
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* @param array $patBlocks pattern blocks from valid URL |
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* |
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* @return array |
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*/ |
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private function parseUri(array $uriBlocks = [], array $patBlocks = []) |
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{ |
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$attr = []; |
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foreach (range(0, count($uriBlocks) - 1) AS $i) { |
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if (0 === strpos($patBlocks[$i], '<')) { |
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$cut = strpos($patBlocks[$i], ':'); |
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if (preg_match('/'.substr($patBlocks[$i], $cut + 1, -1).'/', $uriBlocks[$i])) { |
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$attr[substr($patBlocks[$i], 1, $cut - 1)] = $uriBlocks[$i]; |
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} else { |
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return null; |
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} |
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} elseif ($uriBlocks[$i] !== $patBlocks[$i]) { |
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return null; |
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} else { |
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$attr[$uriBlocks[$i]] = $patBlocks[$i]; |
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} |
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} |
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return $attr; |
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} |
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/** |
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* Replacement $result with repBlocks |
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* |
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* @access private |
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* |
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* @param array $attr elements of valid URL |
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* @param array $repBlocks replacement blocks from valid URL |
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* |
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* @return bool|null|string |
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*/ |
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private function buildResult(&$attr, $repBlocks) |
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{ |
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$result = null; |
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foreach ($repBlocks AS $value) { |
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if (0 !== strpos($value, '<')) { |
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$result .= '/'.$value; |
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unset($attr[$value]); |
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} else { |
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$element = substr($value, 1, -1); |
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if (!empty($attr[$element])) { |
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$result .= '/'.$attr[$element]; |
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unset($attr[$element]); |
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} else { |
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return false; |
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} |
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} |
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} |
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return $result; |
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} |
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} |
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linpax /
microphp-framework
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.