feat: support is('ajax')

Author: kenjis

system/HTTP/IncomingRequest.php

@@ -378,8 +378,8 @@ public function negotiate(string $type, array $supported, bool $strictMatch = fa
     /**
      * Checks if this request is.
      *
-     * @param string $value HTTP verb or 'json'
-     * @phpstan-param string|'get'|'post'|'put'|'delete'|'head'|'patch'|'options'|'json' $value
+     * @param string $value HTTP verb or 'json' or 'ajax'
+     * @phpstan-param string|'get'|'post'|'put'|'delete'|'head'|'patch'|'options'|'json'|'ajax' $value
      */
     public function is(string $value): bool
     {
@@ -395,6 +395,10 @@ public function is(string $value): bool
             return strpos($this->getHeaderLine('Content-Type'), 'application/json') !== false;
         }
 
+        if ($value === 'ajax') {
+            return $this->isAJAX();
+        }
+
         throw new InvalidArgumentException('Unknown value: ' . $value);
     }
 

tests/system/HTTP/IncomingRequestTest.php

@@ -667,6 +667,13 @@ public function testIsJson()
         $this->assertTrue($request->is('json'));
     }
 
+    public function testIsWithAjax()
+    {
+        $request = $this->request->setHeader('X-Requested-With', 'XMLHttpRequest');
+
+        $this->assertTrue($request->is('ajax'));
+    }
+
     public function testIsCLI()
     {
         $this->assertFalse($this->request->isCLI());