created initial methods for WC_Order_Refund class

includes/class-wc-order-refund.php

@@ -2,7 +2,7 @@
 /**
  * Order refund
  *
- * @class    WC_Order
+ * @class    WC_Order_Refund
  * @version  2.2.0
  * @package  WooCommerce/Classes
  * @category Class
@@ -14,11 +14,79 @@ class WC_Order_Refund extends WC_Abstract_Order {
 	/**
 	 * Initialize the order refund.
 	 *
-	 * @param int|WC_Order $order
+	 * @param int|WC_Order_Refund $refund
 	 */
-	public function __construct( $order ) {
+	public function __construct( $refund ) {
 		$this->order_type = 'refund';
 
-		parent::__construct( $order );
+		if ( is_numeric( $refund ) ) {
+			$this->id = absint( $refund );
+			$this->post = get_post( $refund );
+			$this->get_refund( $this->id );
+		} elseif ( $refund instanceof WC_Order_Refund ) {
+			$this->id = absint( $refund->id );
+			$this->post = $refund->post;
+			$this->get_refund( $this->id );
+		} elseif ( $refund instanceof WC_Order_Refund || isset( $refund->ID ) ) {
+			$this->id = absint( $refund->ID );
+			$this->post = $refund;
+			$this->get_refund( $this->id );
+		}
+	}
+
+	/**
+	 * Gets an refund from the database
+	 *
+	 * @since 2.2
+	 * @param int $id
+	 * @return bool
+	 */
+	public function get_refund( $id = 0 ) {
+		if ( ! $id ) {
+			return false;
+		}
+
+		if ( $result = get_post( $id ) ) {
+			$this->populate( $result );
+
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Populates an refund from the loaded post data
+	 *
+	 * @since 2.2
+	 * @param mixed $result
+	 * @return void
+	 */
+	public function populate( $result ) {
+		// Standard post data
+		$this->id            = $result->ID;
+		$this->date          = $result->post_date;
+		$this->modified_date = $result->post_modified;
+		$this->reason        = $result->post_excerpt;
+	}
+
+	/**
+	 * Get refunded amount
+	 *
+	 * @since 2.2
+	 * @return int|float
+	 */
+	public function get_refund_amount() {
+		return apply_filters( 'woocommerce_refund_amount', (double) $this->refund_amount, $this );
+	}
+
+	/**
+	 * Get refunded amount
+	 *
+	 * @since 2.2
+	 * @return int|float
+	 */
+	public function get_refund_reason() {
+		return apply_filters( 'woocommerce_refund_reason', $this->reason, $this );
 	}
 }