[5.x] Adds more Attr helpers.

src/Attr.php

@@ -68,7 +68,7 @@ public function __construct(mixed $target)
             }
         } else {
             throw new InvalidArgumentException(
-                'The target must be a class, object, callable, or class-property array.'
+                'The target must be a class, object, callable, or class-property array.',
             );
         }
     }
@@ -102,7 +102,7 @@ public function all(?string $attribute = null): Collection
     }
 
     /**
-     * Retrieves the first instanced attribute value from a class, method, or property.
+     * Retrieves the first instanced attribute value from a target.
      *
      * @template TAttribute of object
      *
@@ -114,6 +114,62 @@ public function first(?string $attribute = null): ?object
         return $this->collect($attribute)->first()?->newInstance();
     }
 
+    /**
+     * Retrieves all the arguments declared for the first given attribute.
+     *
+     * @param  class-string  $attribute
+     * @return scalar[]|null
+     */
+    public function arguments(string $attribute): ?array
+    {
+        return $this->collect($attribute)->first()?->getArguments();
+    }
+
+    /**
+     * Retrieves a Collection of all the arguments for the all declarations of the given attribute.
+     *
+     * @param  class-string  $attribute
+     * @return array<scalar[]>|null
+     */
+    public function allArguments(string $attribute): ?array
+    {
+        return $this->collect($attribute)->map(static function (ReflectionAttribute $attribute): array {
+            return $attribute->getArguments();
+        })->toArray();
+    }
+
+    /**
+     * Check if the target has no attributes set.
+     */
+    public function isEmpty(): bool
+    {
+        return $this->collect(null)->isEmpty();
+    }
+
+    /**
+     * Check if the target has any attribute set.
+     */
+    public function isNotEmpty(): bool
+    {
+        return ! $this->isEmpty();
+    }
+
+    /**
+     * Check if the target has the given attribute.
+     */
+    public function has(string $attribute): bool
+    {
+        return $this->collect($attribute)->isNotEmpty();
+    }
+
+    /**
+     * Check if the target does not have the given attribute.
+     */
+    public function missing(string $attribute): bool
+    {
+        return ! $this->has($attribute);
+    }
+
     /**
      * Executes a method from the first instanced attribute.
      *

tests/AttrTest.php

@@ -6,9 +6,17 @@
 use Error;
 use InvalidArgumentException;
 use Laragear\Meta\Attr;
+use ReflectionClass;
 
 class AttrTest extends TestCase
 {
+    public function test_resolves_from_reflection(): void
+    {
+        $attr = Attr::of(new ReflectionClass(StubClass::class));
+
+        static::assertNotEmpty($attr);
+    }
+
     public function test_resolves_from_class_string(): void
     {
         $attr = Attr::of(StubClass::class);
@@ -102,6 +110,52 @@ public function test_throws_error_if_attribute_class_does_not_exist(): void
         $attr->first('NonExistentAttribute');
     }
 
+    public function test_retrieves_arguments(): void
+    {
+        $attr = Attr::of(StubClass::class);
+
+        static::assertSame(['class'], $attr->arguments(TestAttribute::class));
+    }
+
+    public function test_retrieves_all_arguments(): void
+    {
+        $attr = Attr::of(StubClass::class);
+
+        static::assertSame([['class']], $attr->allArguments(TestAttribute::class));
+    }
+
+    public function test_emptiness(): void
+    {
+        $attr = Attr::of(StubClass::class);
+
+        static::assertFalse($attr->isEmpty());
+        static::assertTrue($attr->isNotEmpty());
+    }
+
+    public function test_test_not_emptiness(): void
+    {
+        $attr = Attr::of(StubClassWithoutAttributes::class);
+
+        static::assertTrue($attr->isEmpty());
+        static::assertFalse($attr->isNotEmpty());
+    }
+
+    public function test_has_given_attribute(): void
+    {
+        $attr = Attr::of(StubClass::class);
+
+        static::assertTrue($attr->has(TestAttribute::class));
+        static::assertFalse($attr->has(StubClass::class));
+    }
+
+    public function test_missing_given_attribute(): void
+    {
+        $attr = Attr::of(StubClass::class);
+
+        static::assertFalse($attr->missing(TestAttribute::class));
+        static::assertTrue($attr->missing(StubClass::class));
+    }
+
     public function test_get_retrieves_property_from_attribute(): void
     {
         $attr = Attr::of(StubClass::class);
@@ -147,6 +201,19 @@ public function getValue(): string
     }
 }
 
+#[Attribute(Attribute::TARGET_METHOD | Attribute::IS_REPEATABLE)]
+class TestRepeatableAttribute
+{
+    public function __construct(public string $value = 'default', public ?string $second = null)
+    {
+    }
+
+    public function getValue(): string
+    {
+        return $this->value;
+    }
+}
+
 #[TestAttribute('class')]
 class StubClass
 {
@@ -157,6 +224,25 @@ class StubClass
     public function stubMethod()
     {
     }
+
+    public function stubMethodWithoutAttributes()
+    {
+    }
+
+    #[TestRepeatableAttribute('first')]
+    #[TestRepeatableAttribute(value: 'second')]
+    #[TestRepeatableAttribute(second: 'test-argument', value: 'third')]
+    public function stubMethodWithMultipleAttributes()
+    {
+    }
+}
+
+class StubClassWithoutAttributes
+{
+    #[TestAttribute('method')]
+    public function stubMethod()
+    {
+    }
 }
 
 #[TestAttribute('function')]