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<?php |
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declare(strict_types=1); |
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namespace Jasny\SwitchRoute\Generator; |
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use Jasny\SwitchRoute\Endpoint; |
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use Jasny\SwitchRoute\InvalidRouteException; |
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/** |
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* Base class for switch script generation. |
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*/ |
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abstract class AbstractGenerate |
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{ |
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/** |
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* Generate routing code for an endpoint. |
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* |
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* @param string $key |
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* @param array $route |
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* @param array $vars |
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* @return string |
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* @throws InvalidRouteException |
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*/ |
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abstract protected function generateRoute(string $key, array $route, array $vars): string; |
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/** |
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* Generate the PHP script with a switch for routing. |
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* |
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* @param array<string,Endpoint|array> $structure |
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* @param int $level Structure depth |
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* @return string |
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*/ |
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protected function generateSwitch(array $structure, int $level = 0): string |
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{ |
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$indent = str_repeat(' ', $level * 8); |
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$code = []; |
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$code[] = $indent . sprintf("switch (\$segments[{$level}] ?? %s) {", '"\0"'); |
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foreach ($structure as $segment => $sub) { |
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$code[] = $indent . ' ' . ($segment === '*' ? 'default' : 'case "' . addslashes($segment) . '"') . ':'; |
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if ($sub instanceof Endpoint) { |
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$code[] = self::indent($this->generateEndpoint($sub), ($level + 1) * 8); |
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} else { |
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$code[] = $this->generateSwitch($sub, $level + 1); // recursion |
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} |
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$code[] = $indent . " break " . ($level + 1) . ";"; |
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} |
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$code[] = $indent . "}"; |
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return join("\n", $code); |
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} |
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/** |
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* Generate a statement for an endpoint. |
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* |
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* @param Endpoint $endpoint |
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* @return string |
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*/ |
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protected function generateEndpoint(Endpoint $endpoint): string |
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{ |
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$code = []; |
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$code[] = "switch (\$method) {"; |
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foreach ($endpoint->getUniqueRoutes() as [$methods, $route, $vars]) { |
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foreach ($methods as $method) { |
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$code[] = sprintf(" case '%s':", $method); |
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} |
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$key = join('|', $methods) . ' ' . $endpoint->getPath(); |
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$routeCode = $this->generateRoute($key, $route, $endpoint->getVars($methods[0])); |
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$code[] = AbstractGenerate::indent($routeCode, 8); |
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} |
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$code[] = "}"; |
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return join("\n", $code); |
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} |
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/** |
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* Generate namespace code and extract class name from fqcn. |
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* |
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* @param string $class |
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* @return array |
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*/ |
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protected function generateNs(string $class): array |
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{ |
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$parts = explode('\\', $class); |
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$className = array_pop($parts); |
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$namespace = $parts !== [] ? "\n" . 'namespace ' . join('\\', $parts) . ";\n" : ''; |
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return [$namespace, $className]; |
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} |
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/** |
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* Indent code with spaces. |
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* {@internal PSR-2 requires the use of 4 spaces for indentation. Other variants like tabs will not be supported.}} |
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* |
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* @param string $code |
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* @param int $spaces |
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* @return string |
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*/ |
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final protected static function indent(string $code, int $spaces = 4): string |
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{ |
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$indentation = str_repeat(' ', $spaces); |
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return $indentation . str_replace("\n", "\n" . $indentation, $code); |
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} |
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} |
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jasny /
switch-route
