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<?php
namespace FastRoute\Dispatcher;
use FastRoute\Dispatcher;
abstract class RegexBasedAbstract implements Dispatcher {
protected $staticRouteMap;
protected $variableRouteData;
protected abstract function dispatchVariableRoute($routeData, $uri);
public function dispatch($httpMethod, $uri) {
if (isset($this->staticRouteMap[$httpMethod][$uri])) {
$handler = $this->staticRouteMap[$httpMethod][$uri];
return [self::FOUND, $handler, []];
}
$varRouteData = $this->variableRouteData;
if (isset($varRouteData[$httpMethod])) {
$result = $this->dispatchVariableRoute($varRouteData[$httpMethod], $uri);
if ($result[0] === self::FOUND) {
return $result;
}
}
// For HEAD requests, attempt fallback to GET
if ($httpMethod === 'HEAD') {
if (isset($this->staticRouteMap['GET'][$uri])) {
$handler = $this->staticRouteMap['GET'][$uri];
return [self::FOUND, $handler, []];
}
if (isset($varRouteData['GET'])) {
$result = $this->dispatchVariableRoute($varRouteData['GET'], $uri);
if ($result[0] === self::FOUND) {
return $result;
}
}
}
// If nothing else matches, try fallback routes
if (isset($this->staticRouteMap['*'][$uri])) {
$handler = $this->staticRouteMap['*'][$uri];
return [self::FOUND, $handler, []];
}
if (isset($varRouteData['*'])) {
$result = $this->dispatchVariableRoute($varRouteData['*'], $uri);
if ($result[0] === self::FOUND) {
return $result;
}
}
// Find allowed methods for this URI by matching against all other HTTP methods as well
$allowedMethods = [];
foreach ($this->staticRouteMap as $method => $uriMap) {
if ($method !== $httpMethod && isset($uriMap[$uri])) {
$allowedMethods[] = $method;
}
}
foreach ($varRouteData as $method => $routeData) {
if ($method === $httpMethod) {
continue;
}
$result = $this->dispatchVariableRoute($routeData, $uri);
if ($result[0] === self::FOUND) {
$allowedMethods[] = $method;
}
}
// If there are no allowed methods the route simply does not exist
if ($allowedMethods) {
return [self::METHOD_NOT_ALLOWED, $allowedMethods];
} else {
return [self::NOT_FOUND];
}
}
}
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