Merge pull request #70 from Billmate/issue-10

Fixes issue #10

classes/requests/helpers/cart/class-bco-cart-articles-helper.php

@@ -49,6 +49,7 @@ public static function get_cart_lines( $cart_item ) {
 			'aprice'     => self::get_article_price( $cart_item ),
 			'withouttax' => self::get_without_tax( $cart_item ),
 			'taxrate'    => self::get_tax_rate( $cart_item ),
+			'discount'   => self::get_discount( $cart_item ),
 		);
 	}
 
@@ -130,4 +131,22 @@ public static function get_tax_rate( $cart_item ) {
 		return round( $tax_rate );
 	}
 
+	/**
+	 * Get cart item discount
+	 *
+	 * @param array $cart_item Cart item.
+	 * @return int $discount Discount in %.
+	 */
+	public static function get_discount( $cart_item ) {
+		$article_price = wc_get_price_excluding_tax( $cart_item['data'] );
+		$line_total    = $cart_item['line_total'];
+
+		if ( ( $article_price * $cart_item['quantity'] ) !== $line_total ) {
+			return round( ( 1 - ( $line_total / ( $article_price * $cart_item['quantity'] ) ) ) * 100 );
+		} else {
+			return 0;
+		}
+		return round( $item_subtotal * 100 );
+	}
+
 }