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<?php |
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|
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namespace FastRoute\RouteParser; |
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|
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use FastRoute\BadRouteException; |
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use FastRoute\RouteParser; |
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|
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/** |
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* Parses route strings of the following form: |
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* |
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* "/user/{name}[/{id:[0-9]+}]" |
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*/ |
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class Std implements RouteParser |
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{ |
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const VARIABLE_REGEX = <<<'REGEX' |
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\{ |
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\s* ([a-zA-Z_][a-zA-Z0-9_-]*) \s* |
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(?: |
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: \s* ([^{}]*(?:\{(?-1)\}[^{}]*)*) |
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)? |
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\} |
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REGEX; |
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const DEFAULT_DISPATCH_REGEX = '[^/]+'; |
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|
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public function parse($route) |
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{ |
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$routeWithoutClosingOptionals = rtrim($route, ']'); |
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$numOptionals = strlen($route) - strlen($routeWithoutClosingOptionals); |
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|
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// Split on [ while skipping placeholders |
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$segments = preg_split('~' . self::VARIABLE_REGEX . '(*SKIP)(*F) | \[~x', $routeWithoutClosingOptionals); |
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if ($numOptionals !== count($segments) - 1) { |
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// If there are any ] in the middle of the route, throw a more specific error message |
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if (preg_match('~' . self::VARIABLE_REGEX . '(*SKIP)(*F) | \]~x', $routeWithoutClosingOptionals)) { |
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throw new BadRouteException('Optional segments can only occur at the end of a route'); |
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} |
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throw new BadRouteException("Number of opening '[' and closing ']' does not match"); |
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} |
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|
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$currentRoute = ''; |
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$routeDatas = []; |
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foreach ($segments as $n => $segment) { |
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if ($segment === '' && $n !== 0) { |
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throw new BadRouteException('Empty optional part'); |
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} |
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|
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$currentRoute .= $segment; |
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$routeDatas[] = $this->parsePlaceholders($currentRoute); |
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} |
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return $routeDatas; |
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} |
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|
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/** |
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* Parses a route string that does not contain optional segments. |
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* |
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* @param string |
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* @return mixed[] |
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*/ |
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private function parsePlaceholders($route) |
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{ |
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if (!preg_match_all( |
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'~' . self::VARIABLE_REGEX . '~x', $route, $matches, |
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PREG_OFFSET_CAPTURE | PREG_SET_ORDER |
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)) { |
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return [$route]; |
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} |
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|
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$offset = 0; |
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$routeData = []; |
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foreach ($matches as $set) { |
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if ($set[0][1] > $offset) { |
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$routeData[] = substr($route, $offset, $set[0][1] - $offset); |
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} |
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$routeData[] = [ |
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$set[1][0], |
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isset($set[2]) ? trim($set[2][0]) : self::DEFAULT_DISPATCH_REGEX |
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]; |
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$offset = $set[0][1] + strlen($set[0][0]); |
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} |
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|
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if ($offset !== strlen($route)) { |
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$routeData[] = substr($route, $offset); |
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} |
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|
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return $routeData; |
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} |
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} |
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|
