first commit

pma/vendor/nikic/fast-route/src/Dispatcher/RegexBasedAbstract.php

@@ -0,0 +1,88 @@
+<?php
+
+namespace FastRoute\Dispatcher;
+
+use FastRoute\Dispatcher;
+
+abstract class RegexBasedAbstract implements Dispatcher
+{
+    /** @var mixed[][] */
+    protected $staticRouteMap = [];
+
+    /** @var mixed[] */
+    protected $variableRouteData = [];
+
+    /**
+     * @return mixed[]
+     */
+    abstract protected function dispatchVariableRoute($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];
+        }
+
+        return [self::NOT_FOUND];
+    }
+}