feat: Implemented Countable to resource and controller collections.

src/Collection/CollectionTrait.php

@@ -13,6 +13,7 @@
 use Traversable;
 use function array_filter;
 use function count;
+use function iterator_count;
 use function iterator_to_array;
 
 /**
@@ -90,6 +91,16 @@ public function has(?string $className = null): bool
         return $output;
     }
 
+    /**
+     * Count elements of an object.
+     *
+     * @return int
+     */
+    public function count(): int
+    {
+        return iterator_count($this->items);
+    }
+
     /**
      * @param string $className
      *

src/Resource/Collection.php

@@ -11,6 +11,7 @@
 use App\Collection\CollectionTrait;
 use App\Rest\RestResourceInterface;
 use Closure;
+use Countable;
 use InvalidArgumentException;
 use Traversable;
 use function sprintf;
@@ -26,7 +27,7 @@
  * @method RestResourceInterface                   get(string $className)
  * @method Traversable<int, RestResourceInterface> getAll(): Traversable
  */
-class Collection
+class Collection implements Countable
 {
     // Traits
     use CollectionTrait;

src/Rest/ControllerCollection.php

@@ -10,6 +10,7 @@
 
 use App\Collection\CollectionTrait;
 use Closure;
+use Countable;
 use InvalidArgumentException;
 use Traversable;
 
@@ -24,7 +25,7 @@
  * @method ControllerInterface                   get(string $className)
  * @method Traversable<int, ControllerInterface> getAll(): Traversable
  */
-class ControllerCollection
+class ControllerCollection implements Countable
 {
     // Traits
     use CollectionTrait;