Added fields for created and updated at

Added getters
needs testing

composer.json

@@ -16,7 +16,8 @@
     "require": {
         "illuminate/support": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*",
         "illuminate/session": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*",
-        "illuminate/events": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*"
+        "illuminate/events": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*",
+        "nesbot/carbon": "^1.26.3"
     },
     "require-dev": {
         "phpunit/phpunit": "~5.0|~6.0|~7.0",

src/Cart.php

@@ -12,6 +12,7 @@ use Illuminate\Contracts\Events\Dispatcher;
 use Illuminate\Database\DatabaseManager;
 use Illuminate\Session\SessionManager;
 use Illuminate\Support\Collection;
+use Carbon\Carbon;
 
 class Cart
 {
@@ -38,6 +39,20 @@ class Cart
      */
     private $instance;
 
+    /**
+     * Holds the creation date of the cart
+     * 
+     * @var mixed
+     */
+    private $createdAt;
+
+    /**
+     * Holds the update date of the cart
+     * 
+     * @var mixed
+     */
+    private $updatedAt;
+
     /**
      * Defines the discount percentage.
      *
@@ -580,7 +595,7 @@ class Cart
             'identifier' => $identifier,
             'instance'   => $this->currentInstance(),
             'content'    => serialize($content),
-            'created_at' => date('Y-m-d H:i:s'),
+            'created_at' => $this->createdAt ?: date('Y-m-d H:i:s'),
             'updated_at' => date('Y-m-d H:i:s'),
         ]);
 
@@ -625,6 +640,9 @@ class Cart
 
         $this->instance($currentInstance);
 
+        $this->createdAt = Carbon::parse(data_get($stored, 'created_at'));
+        $this->updatedAt = Carbon::parse(data_get($stored, 'updated_at'));
+
         $this->getConnection()->table($this->getTableName())
             ->where('identifier', $identifier)->delete();
     }
@@ -803,4 +821,24 @@ class Cart
 
         return number_format($value, $decimals, $decimalPoint, $thousandSeperator);
     }
+
+    /**
+     * Get the creation date of the cart (db context).
+     *
+     * @return \Carbon\Carbon|null
+     */
+    private function createdAt()
+    {
+        return $this->createdAt;
+    }
+
+    /**
+     * Get the lats update date of the cart (db context).
+     *
+     * @return \Carbon\Carbon|null
+     */
+    private function updatedAt()
+    {
+        return $this->createdAt;
+    }
 }