[+] MO : multi-shop allow the removal of a shop if it has no order and no customer

git-svn-id: http://dev.prestashop.com/svn/v1/branches/1.5.x@9722 b9a71923-0436-4b27-9f14-aed3839534dd

classes/shop/Shop.php

@@ -155,7 +155,7 @@ class ShopCore extends ObjectModel
 
 	public function delete()
 	{
-		if (!$res = parent::delete())
+		if (self::has_dependency($this->id) || !$res = parent::delete())
 			return false;
 
 		foreach (Shop::getAssoTables() as $table_name => $row)
@@ -173,6 +173,27 @@ class ShopCore extends ObjectModel
 		return $res;
 	}
 
+	/**
+	 * Detect dependency with customer or orders
+	 *
+	 * @return bool
+	 */
+	public static function has_dependency($id_shop)
+	{
+		$has_dependency = false;
+		$nbr_customer = (int)Db::getInstance()->getValue('SELECT `id_customer` FROM `'._DB_PREFIX_.'customer` WHERE `id_shop`='.(int)$id_shop);
+		if($nbr_customer)
+			$has_dependency = true;
+		else
+		{
+			$nbr_order= (int)Db::getInstance()->getValue('SELECT `id_order` FROM `'._DB_PREFIX_.'orders` WHERE `id_shop`='.(int)$id_shop);
+			if($nbr_order)
+				$has_dependency = true;
+		}
+
+		return $has_dependency;
+	}
+
 	/**
 	 * Get a new instance of a shop
 	 *