Std.php
88 lines
| 1 | <?php |
| 2 | |
| 3 | namespace FastRoute\RouteParser; |
| 4 | |
| 5 | use FastRoute\BadRouteException; |
| 6 | use FastRoute\RouteParser; |
| 7 | |
| 8 | /** |
| 9 | * Parses route strings of the following form: |
| 10 | * |
| 11 | * "/user/{name}[/{id:[0-9]+}]" |
| 12 | */ |
| 13 | class Std implements RouteParser |
| 14 | { |
| 15 | const VARIABLE_REGEX = <<<'REGEX' |
| 16 | \{ |
| 17 | \s* ([a-zA-Z_][a-zA-Z0-9_-]*) \s* |
| 18 | (?: |
| 19 | : \s* ([^{}]*(?:\{(?-1)\}[^{}]*)*) |
| 20 | )? |
| 21 | \} |
| 22 | REGEX; |
| 23 | const DEFAULT_DISPATCH_REGEX = '[^/]+'; |
| 24 | |
| 25 | public function parse($route) |
| 26 | { |
| 27 | $routeWithoutClosingOptionals = rtrim($route, ']'); |
| 28 | $numOptionals = strlen($route) - strlen($routeWithoutClosingOptionals); |
| 29 | |
| 30 | // Split on [ while skipping placeholders |
| 31 | $segments = preg_split('~' . self::VARIABLE_REGEX . '(*SKIP)(*F) | \[~x', $routeWithoutClosingOptionals); |
| 32 | if ($numOptionals !== count($segments) - 1) { |
| 33 | // If there are any ] in the middle of the route, throw a more specific error message |
| 34 | if (preg_match('~' . self::VARIABLE_REGEX . '(*SKIP)(*F) | \]~x', $routeWithoutClosingOptionals)) { |
| 35 | throw new BadRouteException('Optional segments can only occur at the end of a route'); |
| 36 | } |
| 37 | throw new BadRouteException("Number of opening '[' and closing ']' does not match"); |
| 38 | } |
| 39 | |
| 40 | $currentRoute = ''; |
| 41 | $routeDatas = []; |
| 42 | foreach ($segments as $n => $segment) { |
| 43 | if ($segment === '' && $n !== 0) { |
| 44 | throw new BadRouteException('Empty optional part'); |
| 45 | } |
| 46 | |
| 47 | $currentRoute .= $segment; |
| 48 | $routeDatas[] = $this->parsePlaceholders($currentRoute); |
| 49 | } |
| 50 | return $routeDatas; |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Parses a route string that does not contain optional segments. |
| 55 | * |
| 56 | * @param string |
| 57 | * @return mixed[] |
| 58 | */ |
| 59 | private function parsePlaceholders($route) |
| 60 | { |
| 61 | if (!preg_match_all( |
| 62 | '~' . self::VARIABLE_REGEX . '~x', $route, $matches, |
| 63 | PREG_OFFSET_CAPTURE | PREG_SET_ORDER |
| 64 | )) { |
| 65 | return [$route]; |
| 66 | } |
| 67 | |
| 68 | $offset = 0; |
| 69 | $routeData = []; |
| 70 | foreach ($matches as $set) { |
| 71 | if ($set[0][1] > $offset) { |
| 72 | $routeData[] = substr($route, $offset, $set[0][1] - $offset); |
| 73 | } |
| 74 | $routeData[] = [ |
| 75 | $set[1][0], |
| 76 | isset($set[2]) ? trim($set[2][0]) : self::DEFAULT_DISPATCH_REGEX |
| 77 | ]; |
| 78 | $offset = $set[0][1] + strlen($set[0][0]); |
| 79 | } |
| 80 | |
| 81 | if ($offset !== strlen($route)) { |
| 82 | $routeData[] = substr($route, $offset); |
| 83 | } |
| 84 | |
| 85 | return $routeData; |
| 86 | } |
| 87 | } |
| 88 |