From e15c1235108ca08984a82c6c5121b752ccd96a2c Mon Sep 17 00:00:00 2001
From: Mike Jolley <mike.jolley@me.com>
Date: Tue, 12 Jan 2016 09:49:46 +0000
Subject: [PATCH] Fix - Missing validation rule for product cat exclusion
 coupons (validate_excluded_product_categories)

Fixes #10058
---
 includes/class-wc-coupon.php | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/includes/class-wc-coupon.php b/includes/class-wc-coupon.php
index cbf949dedd8..9452387a177 100644
--- a/includes/class-wc-coupon.php
+++ b/includes/class-wc-coupon.php
@@ -444,6 +444,7 @@ class WC_Coupon {
 				foreach( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
 					$product_cats = wc_get_product_cat_ids( $cart_item['product_id'] );
 
+					// If we find an item with a cat in our allowed cat list, the coupon is valid
 					if ( sizeof( array_intersect( $product_cats, $this->product_categories ) ) > 0 ) {
 						$valid_for_cart = true;
 					}
@@ -455,6 +456,30 @@ class WC_Coupon {
 		}
 	}
 
+	/**
+	 * Ensure coupon is valid for product categories in the cart is valid or throw exception.
+	 *
+	 * @throws Exception
+	 */
+	private function validate_excluded_product_categories() {
+		if ( sizeof( $this->exclude_product_categories ) > 0 ) {
+			$valid_for_cart = false;
+			if ( ! WC()->cart->is_empty() ) {
+				foreach( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
+					$product_cats = wc_get_product_cat_ids( $cart_item['product_id'] );
+
+					// If we find an item with a cat NOT in our disallowed cat list, the coupon is valid
+					if ( empty( $product_cats ) || sizeof( array_diff( $product_cats, $this->exclude_product_categories ) ) > 0 ) {
+						$valid_for_cart = true;
+					}
+				}
+			}
+			if ( ! $valid_for_cart ) {
+				throw new Exception( self::E_WC_COUPON_NOT_APPLICABLE );
+			}
+		}
+	}
+
 	/**
 	 * Ensure coupon is valid for sale items in the cart is valid or throw exception.
 	 *
@@ -581,6 +606,7 @@ class WC_Coupon {
 			$this->validate_maximum_amount();
 			$this->validate_product_ids();
 			$this->validate_product_categories();
+			$this->validate_excluded_product_categories();
 			$this->validate_sale_items();
 			$this->validate_cart_excluded_items();