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<?php |
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/** |
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* Codeburner Framework. |
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* |
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* @author Alex Rohleder <[email protected]> |
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* @copyright 2016 Alex Rohleder |
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* @license http://opensource.org/licenses/MIT |
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*/ |
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namespace Codeburner\Router; |
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use Codeburner\Router\Exceptions\BadRouteException; |
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/** |
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* Representation of a group of several routes with same |
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* controller and respecting the resourceful actions. |
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* |
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* @author Alex Rohleder <[email protected]> |
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*/ |
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class Parser |
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{ |
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/** |
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* These regex define the structure of a dynamic segment in a pattern. |
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* |
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* @var string |
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*/ |
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const DYNAMIC_REGEX = "{\s*(\w*)\s*(?::\s*([^{}]*(?:{(?-1)}*)*))?\s*}"; |
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/** |
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* Some regex wildcards for easily definition of dynamic routes. ps. all keys and values must start with : |
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* |
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* @var array |
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*/ |
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protected $wildcards = [ |
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":uid" => ":uid-[a-zA-Z0-9]", |
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":slug" => ":[a-z0-9-]", |
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":string" => ":\w", |
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":int" => ":\d", |
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":integer" => ":\d", |
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":float" => ":[-+]?\d*?[.]?\d", |
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":double" => ":[-+]?\d*?[.]?\d", |
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":hex" => ":0[xX][0-9a-fA-F]", |
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":octal" => ":0[1-7][0-7]", |
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":bool" => ":1|0|true|false|yes|no", |
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":boolean" => ":1|0|true|false|yes|no", |
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]; |
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/** |
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* Separate routes pattern with optional parts into n new patterns. |
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* |
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* @param string $pattern |
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* |
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* @throws BadRouteException |
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* @return array |
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*/ |
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public function parsePattern($pattern) |
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{ |
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$withoutClosing = rtrim($pattern, "]"); |
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$closingNumber = strlen($pattern) - strlen($withoutClosing); |
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$segments = preg_split("~" . self::DYNAMIC_REGEX . "(*SKIP)(*F)|\[~x", $withoutClosing); |
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$this->parseSegments($segments, $closingNumber, $withoutClosing); |
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return $this->buildSegments($segments); |
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} |
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/** |
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* Parse all the possible patterns seeking for an incorrect or incompatible pattern. |
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* |
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* @param string[] $segments Segments are all the possible patterns made on top of a pattern with optional segments. |
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* @param int $closingNumber The count of optional segments. |
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* @param string $withoutClosing The pattern without the closing token of an optional segment. aka: ] |
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* |
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* @throws BadRouteException |
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*/ |
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protected function parseSegments(array $segments, $closingNumber, $withoutClosing) |
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{ |
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if ($closingNumber !== count($segments) - 1) { |
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if (preg_match("~" . self::DYNAMIC_REGEX . "(*SKIP)(*F)|\]~x", $withoutClosing)) { |
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throw new BadRouteException(BadRouteException::OPTIONAL_SEGMENTS_ON_MIDDLE); |
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} else throw new BadRouteException(BadRouteException::UNCLOSED_OPTIONAL_SEGMENTS); |
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} |
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} |
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/** |
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* @param string[] $segments |
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* |
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* @throws BadRouteException |
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* @return array |
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*/ |
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protected function buildSegments(array $segments) |
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{ |
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$pattern = ""; |
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$patterns = []; |
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$wildcardTokens = array_keys($this->wildcards); |
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$wildcardRegex = $this->wildcards; |
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foreach ($segments as $n => $segment) { |
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if ($segment === "" && $n !== 0) { |
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throw new BadRouteException(BadRouteException::EMPTY_OPTIONAL_PARTS); |
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} |
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$patterns[] = $pattern .= str_replace($wildcardTokens, $wildcardRegex, $segment); |
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} |
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return $patterns; |
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} |
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/** |
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* @return string[] |
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*/ |
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public function getWildcards() |
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{ |
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$wildcards = []; |
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foreach ($this->wildcards as $token => $regex) |
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$wildcards[substr($token, 1)] = substr($regex, 1); |
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return $wildcards; |
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} |
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/** |
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* @return string[] |
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*/ |
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public function getWildcardTokens() |
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{ |
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return $this->wildcards; |
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} |
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/** |
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* @param string $wildcard |
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* @return string|null |
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*/ |
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public function getWildcard($wildcard) |
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{ |
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return isset($this->wildcards[":$wildcard"]) ? substr($this->wildcards[":$wildcard"], 1) : null; |
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} |
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/** |
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* @param string $wildcard |
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* @param string $pattern |
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* |
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* @return self |
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*/ |
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public function setWildcard($wildcard, $pattern) |
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{ |
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$this->wildcards[":$wildcard"] = ":$pattern"; |
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return $this; |
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} |
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} |
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