Make ValidationRuleArrayStringValueToArrayRector work with Request object calls

src/Rector/MethodCall/ValidationRuleArrayStringValueToArrayRector.php

@@ -63,6 +63,10 @@ public function refactor(Node $node): MethodCall|StaticCall|ClassLike|null
             return $this->refactorClassMethod($node);
         }
 
+        if ($node instanceof MethodCall && $this->isName($node->name, 'validate')) {
+            return $this->refactorValidateCall($node);
+        }
+
         return $this->refactorCall($node);
     }
 
@@ -184,6 +188,30 @@ private function refactorCall(StaticCall|MethodCall $node): StaticCall|MethodCal
         return $this->processValidationRules($rulesArgument) ? $node : null;
     }
 
+    private function refactorValidateCall(MethodCall $methodCall): ?MethodCall
+    {
+        if (! $this->isObjectType($methodCall->var, new ObjectType('Illuminate\Http\Request'))) {
+            return null;
+        }
+
+        if ($methodCall->args === []) {
+            return null;
+        }
+
+        if (! $methodCall->args[0] instanceof Arg) {
+            return null;
+        }
+
+        // The first argument should be the rules array
+        $rulesArgument = $methodCall->args[0]->value;
+
+        if (! $rulesArgument instanceof Array_) {
+            return null;
+        }
+
+        return $this->processValidationRules($rulesArgument) ? $methodCall : null;
+    }
+
     private function refactorClassMethod(ClassLike $classLike): ?ClassLike
     {
         if (! $this->isObjectType($classLike, new ObjectType('Illuminate\Foundation\Http\FormRequest'))) {

tests/Rector/MethodCall/ValidationRuleArrayStringValueToArrayRector/Fixture/applies_to_http_requests.php.inc

@@ -0,0 +1,31 @@
+<?php
+
+namespace RectorLaravel\Tests\Rector\MethodCall\ValidationRuleArrayStringValueToArrayRector\Fixture;
+
+class AppliesToHttpRequests
+{
+    public function store(\Illuminate\Http\Request $request)
+    {
+        $request->validate([
+            'name' => 'required|string',
+        ]);
+    }
+}
+
+?>
+-----
+<?php
+
+namespace RectorLaravel\Tests\Rector\MethodCall\ValidationRuleArrayStringValueToArrayRector\Fixture;
+
+class AppliesToHttpRequests
+{
+    public function store(\Illuminate\Http\Request $request)
+    {
+        $request->validate([
+            'name' => ['required', 'string'],
+        ]);
+    }
+}
+
+?>