HP-1751 added possibility to count elements in PriceTypeDefinitionCollection

Author: VadymHrechukha

src/product/price/PriceTypeDefinitionCollection.php

@@ -49,4 +49,9 @@ public function end(): TariffTypeDefinitionInterface
     {
         return $this->parent;
     }
+
+    public function count(): int
+    {
+        return $this->storage->count();
+    }
 }

src/product/price/PriceTypeDefinitionCollectionInterface.php

@@ -5,7 +5,7 @@
 use hiqdev\php\billing\product\TariffTypeDefinitionInterface;
 use hiqdev\php\billing\type\TypeInterface;
 
-interface PriceTypeDefinitionCollectionInterface extends \IteratorAggregate
+interface PriceTypeDefinitionCollectionInterface extends \IteratorAggregate, \Countable
 {
     /**
      * @return PriceTypeDefinition[]

src/product/price/PriceTypeStorage.php

@@ -4,13 +4,17 @@
 
 use hiqdev\php\billing\type\TypeInterface;
 
-class PriceTypeStorage
+class PriceTypeStorage implements \Countable
 {
     private array $pricesGroupedByPriceType = [];
 
+    private int $i = 0;
+
     public function add(TypeInterface $type, PriceTypeDefinition $priceTypeDefinition): void
     {
         $this->pricesGroupedByPriceType[$type->getName()][] = $priceTypeDefinition;
+
+        $this->i++;
     }
 
     /**
@@ -27,4 +31,9 @@ public function getAll(): array
 
         return $allPrices;
     }
+
+    public function count(): int
+    {
+        return $this->i;
+    }
 }