1 files changed, 31 insertions, 0 deletions
diff --git a/app/models/solidus_subscriptions/promotion/rules/subscription_installment_order.rb b/app/models/solidus_subscriptions/promotion/rules/subscription_installment_order.rb
new file mode 100644
index 0000000..455825d
--- /dev/null
+++ b/app/models/solidus_subscriptions/promotion/rules/subscription_installment_order.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+module SolidusSubscriptions
+  module Promotion
+    module Rules
+      class SubscriptionInstallmentOrder < ::Spree::PromotionRule
+        # Promotion can be applied to an entire order. Will only be true
+        # for Spree::Order
+        #
+        # @param promotable [Object] Any object which could have this
+        #   promotion rule applied to it.
+        #
+        # @return [Boolean]
+        def applicable?(promotable)
+          promotable.is_a? ::Spree::Order
+        end
+
+        # An order is eligible if it fulfills a subscription Installment. Will only
+        # return true if the order fulfills one or more Installments
+        #
+        # @param order [Spree::Order] The order which could have this rule applied
+        #   to it.
+        #
+        # @return [Boolean]
+        def eligible?(order, **_options)
+          order.subscription_order?
+        end
+      end
+    end
+  end
+end