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<?php |
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/** |
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* Phossa Project |
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* |
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* PHP version 5.4 |
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* |
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* @category Library |
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* @package Phossa2\Route |
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* @copyright Copyright (c) 2016 phossa.com |
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* @license http://mit-license.org/ MIT License |
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* @link http://www.phossa.com/ |
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*/ |
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/*# declare(strict_types=1); */ |
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namespace Phossa2\Route\Parser; |
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use Phossa2\Route\Message\Message; |
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/** |
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* ParserGcb |
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* |
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* FastRoute algorithm |
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* |
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* @package Phossa2\Route |
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* @author Hong Zhang <[email protected]> |
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* @see ParserAbstract |
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* @version 2.0.0 |
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* @since 2.0.0 added |
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*/ |
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class ParserGcb extends ParserAbstract |
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{ |
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/** |
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* group position map |
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* |
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* @var array |
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* @access protected |
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*/ |
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protected $maps = []; |
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/** |
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* chunk size 4 - 12 for merging regex |
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* |
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* @var int |
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* @access protected |
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*/ |
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protected $chunk = 8; |
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/** |
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* combined regex (cache) |
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* |
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* @var string[] |
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* @access protected |
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*/ |
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protected $data = []; |
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/** |
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* another cache |
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* |
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* @var string[] |
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* @access protected |
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*/ |
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protected $xmap = []; |
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/** |
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* {@inheritDoc} |
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*/ |
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public function processRoute( |
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/*# string */ $routeName, |
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/*# string */ $routePattern |
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)/*# : string */ { |
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list($regex, $map) = $this->convert($routePattern); |
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$this->maps[$routeName] = $map; |
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$this->doneProcess($routeName, $routePattern, $regex); |
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return $regex; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function matchPath(/*# string */ $uriPath) |
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{ |
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$matches = []; |
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foreach ($this->getRegexData() as $i => $regex) { |
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if (preg_match($regex, $uriPath, $matches)) { |
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$map = array_flip($this->xmap[$i]); |
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$key = $map[count($matches) - 1]; |
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return $this->fixMatches($key, $matches); |
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} |
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} |
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return false; |
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} |
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/** |
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* Convert to regex |
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* |
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* @param string $pattern pattern to parse |
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* @return array |
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* @access protected |
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*/ |
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protected function convert(/*# string */ $pattern)/*# : array */ |
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{ |
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$ph = sprintf("\{%s(?:%s)?\}", self::MATCH_GROUP_NAME, self::MATCH_GROUP_TYPE); |
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// count placeholders |
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$map = $m = []; |
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if (preg_match_all('~'. $ph .'~x', $pattern, $m)) { |
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$map = $m[1]; |
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} |
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$result = preg_replace( |
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[ |
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'~' . $ph . '(*SKIP)(*FAIL) | \[~x', '~' . $ph . '(*SKIP)(*FAIL) | \]~x', |
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'~\{' . self::MATCH_GROUP_NAME . '\}~x', '~' . $ph . '~x', |
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], |
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['(?:', ')?', '{\\1:' . self::MATCH_SEGMENT . '}', '(\\2)'], |
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strtr('/' . trim($pattern, '/'), $this->shortcuts) |
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); |
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return [$result, $map]; |
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} |
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/** |
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* Merge several (chunk size) regex into one |
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* |
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* @return array |
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* @access protected |
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*/ |
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protected function getRegexData()/*# : array */ |
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{ |
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// load from cache |
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if (!$this->modified) { |
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return $this->data; |
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} |
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// merge |
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$this->data = array_chunk($this->regex, $this->chunk, true); |
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foreach ($this->data as $i => $arr) { |
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$map = $this->getMapData($arr, $this->maps); |
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$str = '~^(?|'; |
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foreach ($arr as $k => $reg) { |
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$str .= $reg . str_repeat('()', $map[$k] - count($this->maps[$k])) . '|'; |
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} |
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$this->data[$i] = substr($str, 0, -1) . ')$~x'; |
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$this->xmap[$i] = $map; |
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} |
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$this->modified = false; |
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return $this->data; |
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} |
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/** |
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* @param array $arr |
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* @param array $maps |
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* @return array |
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* @access protected |
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*/ |
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protected function getMapData(array $arr, array $maps)/*#: array */ |
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{ |
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$new1 = []; |
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$keys = array_keys($arr); |
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foreach ($keys as $k) { |
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$new1[$k] = count($maps[$k]) + 1; // # of PH for route $k |
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} |
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$new2 = array_flip($new1); |
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$new3 = array_flip($new2); |
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foreach ($keys as $k) { |
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if (!isset($new3[$k])) { |
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foreach (range(1, 200) as $i) { |
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$cnt = $new1[$k] + $i; |
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if (!isset($new2[$cnt])) { |
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$new2[$cnt] = $k; |
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$new3[$k] = $cnt; |
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break; |
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} |
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} |
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} |
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} |
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return $new3; |
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} |
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/** |
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* Fix matched placeholders, return with unique route key |
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* |
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* @param string $name the route key/name |
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* @param array $matches desc |
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* @return array [ $name, $matches ] |
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* @access protected |
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*/ |
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protected function fixMatches( |
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/*# string */ $name, |
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array $matches |
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)/*# : array */ { |
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$res = []; |
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$map = $this->maps[$name]; |
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foreach ($matches as $idx => $val) { |
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if ($idx > 0 && '' !== $val) { |
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$res[$map[$idx - 1]] = $val; |
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} |
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} |
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// debug |
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$this->debug(Message::get( |
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Message::RTE_PARSER_MATCH, |
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$name, |
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$this->regex[$name] |
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)); |
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return [$name, $res]; |
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} |
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} |
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phossa2 /
libs
