feat: allow shop standard fields to be included/excluded from coupons

src/Plugin.php

@@ -270,6 +270,9 @@ public static function init() {
       add_action('woocommerce_order_details_before_order_table', __NAMESPACE__ . '\WooCommerce::woocommerce_order_details_before_order_table');
     }
 
+    // Exclude coupon for producs with custom shopstandards fields marked as exclude.
+    add_filter('woocommerce_coupon_get_discount_amount', __NAMESPACE__ . '\WooCommerce::apply_product_shop_standard_field_validations_to_coupon',11,5);
+
   }
 
   /**
@@ -345,6 +348,56 @@ public static function register_acf() {
       'instruction_placement' => 'label',
       'active' => 1,
     ]);
+
+    acf_add_local_field_group([
+      'key' => 'acf_shop_standard_coupon_exclude',
+      'title' => __('Shop standard fields to exclude from coupon', Plugin::L10N),
+      'fields' => [
+          [
+              'key' => 'acf_shop_standard_coupon_validation',
+              'name' => 'acf_shop_standard_coupon_validation',
+              'label' => __('Validate Shop standard field on coupon.',Plugin::L10N),              
+              'type' => 'repeater',
+              'layout' => 'table',
+              'instructions' => __('List of shop standard fields to validate.', Plugin::L10N),
+              'button_label' => __('Add validation', Plugin::L10N),
+              'sub_fields' => [
+                [
+                  'key' => 'acf_shop_standard_product_field',
+                  'name' => 'acf_shop_standard_product_field',
+                  'label' => __('Shop standard product field', Plugin::L10N),
+                  'type' => 'select',
+                  'choices' => woocommerce::get_product_fields(),
+                  'allow_null' => 0,
+                  'multiple' => 0,
+                  'ui' => 1,
+                ],
+                [
+                  'key' => 'acf_shop_standard_include_or_exclude',
+                  'name' => 'acf_shop_standard_include_or_exclude',
+                  'label' => __('Coupon validaton for field.', Plugin::L10N),
+                  'type' => 'select',
+                  'choices' => [
+                      'INCLUDE' => 'INCLUDE',
+                      'EXCLUDE' => 'EXCLUDE',
+                  ],                  
+                  'allow_null' => 0,
+                  'multiple' => 0,
+                  'ui' => 1,
+                ],
+              ],
+          ],
+      ],
+      'location' => [
+          [
+              [
+                  'param' => 'post_type',
+                  'operator' => '==',
+                  'value' => 'shop_coupon',
+              ],
+          ],
+      ],      
+    ]);
   }
 
   /**

src/WooCommerce.php

@@ -1548,4 +1548,50 @@ public static function woocommerce_order_details_before_order_table($order) {
     }
   }
 
+  /**
+   * Validates if the product cart item has a field marked as EXCLUDE in the coupon and applies the discount accordingly.
+   *
+   * @return int Discount value for the cart item.
+   */
+  public static function apply_product_shop_standard_field_validations_to_coupon($discount, $discounting_amount, $cart_item, $single, $coupon) {
+
+    // Gets the coupon id.
+    $coupon_id = $coupon->get_id();
+
+    // Gets the repeater 'acf_shop_standard_coupon_validation' value list.
+    $shop_standards_fields = get_field('acf_shop_standard_coupon_validation', $coupon_id);
+
+    $exclude_shop_standard_fields = [];
+
+    // Gets the shop standard fields of the coupon marked as EXCLUDE.
+    if (!empty($shop_standards_fields) && is_array($shop_standards_fields)) {
+        foreach ($shop_standards_fields as $field) {
+            // Get sub field values.
+            $acf_shop_standards_product_field = $field['acf_shop_standard_product_field']; 
+            $included_or_excluded = $field['acf_shop_standard_include_or_exclude']; 
+
+            if($included_or_excluded === 'EXCLUDE'){
+              $exclude_shop_standard_fields[] = $acf_shop_standards_product_field;
+            }            
+        }
+    } 
+
+    // Get product fields matching with coupon fields marked as EXCLUDE.
+    $product_id = $cart_item['product_id'];
+    $product = wc_get_product($product_id);
+    $product_fields = [];
+
+    foreach ($exclude_shop_standard_fields as $field) {
+      $product_shop_standard_field=$product->get_meta($field,true);
+      if($product_shop_standard_field && wc_string_to_bool($product_shop_standard_field)){
+        $product_fields[] = $field;
+      }     
+    }
+
+    if (!empty($product_fields)) {
+      return 0;
+    }
+    return $discount;
+  }
+
 }