update: Added modifier to enum rule

Author: erik-perri

src/RuleSet.php

@@ -446,10 +446,17 @@ public function endsWith(string ...$value): self
      *
      * @link https://laravel.com/docs/10.x/validation#rule-enum
      * @param class-string $type
+     * @param ?callable(\Illuminate\Validation\Rules\Enum): void $modifier
      */
-    public function enum(string $type): self
+    public function enum(string $type, ?callable $modifier = null): self
     {
-        return $this->rule(Rule::enum($type));
+        $rule = Rule::enum($type);
+
+        if ($modifier) {
+            $modifier($rule);
+        }
+
+        return $this->rule($rule);
     }
 
     /**

tests/Stubs/ExampleStringEnum.php

@@ -6,5 +6,6 @@
 
 enum ExampleStringEnum: string
 {
+    case Another = 'another';
     case Valid = 'valid';
 }

tests/Unit/RuleTest.php

@@ -18,6 +18,7 @@
 use Illuminate\Support\Facades\Validator;
 use Illuminate\Support\Str;
 use Illuminate\Validation\Rules\Dimensions;
+use Illuminate\Validation\Rules\Enum;
 use Illuminate\Validation\Rules\Password;
 use Sourcetoad\RuleHelper\Rule;
 use Sourcetoad\RuleHelper\RuleSet;
@@ -953,6 +954,22 @@ public function ruleDataProvider(): array
                 'rules' => fn() => RuleSet::create()->enum(ExampleIntEnum::class),
                 'fails' => true,
             ],
+            'enum string constrained valid' => [
+                'data' => 'another',
+                'rules' => fn() => RuleSet::create()->enum(
+                    ExampleStringEnum::class,
+                    fn(Enum $rule) => $rule->only(ExampleStringEnum::Another),
+                ),
+                'fails' => false,
+            ],
+            'enum string constrained invalid' => [
+                'data' => 'another',
+                'rules' => fn() => RuleSet::create()->enum(
+                    ExampleStringEnum::class,
+                    fn(Enum $rule) => $rule->except(ExampleStringEnum::Another),
+                ),
+                'fails' => true,
+            ],
             'extensions valid' => [
                 'data' => fn() => $this->mockFile('/code/image.jpg'),
                 'rules' => fn() => RuleSet::create()->extensions('jpg', 'png'),