feat(dashboard,core,modules): free shipping promotion in dashboard (#13263)

* feat(dashboard,core,modules): free shipping promotion in dashboard

* self-review

* adapt for edit to work

* changeset

* integration tests

* across for each

* remove only from tests

* remove console log

* revert to across

* update wording for shipping promotions

* modify changeset

* suggestion frane

* fix i18n schema

packages/modules/promotion/src/utils/compute-actions/index.ts

@@ -1,3 +1,4 @@
 export * from "./buy-get"
 export * from "./line-items"
+export * from "./shipping-methods"
 export * from "./usage"

packages/modules/promotion/src/utils/compute-actions/line-items.ts

@@ -6,11 +6,11 @@ import {
 import {
   ApplicationMethodAllocation,
   ApplicationMethodTargetType,
+  ApplicationMethodTargetType as TargetType,
+  calculateAdjustmentAmountFromPromotion,
   ComputedActions,
   MathBN,
   MedusaError,
-  ApplicationMethodTargetType as TargetType,
-  calculateAdjustmentAmountFromPromotion,
 } from "@medusajs/framework/utils"
 import { areRulesValidForContext } from "../validations"
 import { computeActionForBudgetExceeded } from "./usage"
@@ -43,29 +43,6 @@ export function getComputedActionsForItems(
   )
 }
 
-export function getComputedActionsForShippingMethods(
-  promotion: PromotionTypes.PromotionDTO,
-  shippingMethods: PromotionTypes.ComputeActionContext[TargetType.SHIPPING_METHODS],
-  appliedPromotionsMap: Map<string, number>
-): PromotionTypes.ComputeActions[] {
-  validateContext("shipping_methods", shippingMethods)
-
-  return applyPromotionToItems(promotion, shippingMethods, appliedPromotionsMap)
-}
-
-export function getComputedActionsForOrder(
-  promotion: PromotionTypes.PromotionDTO,
-  itemApplicationContext: PromotionTypes.ComputeActionContext,
-  methodIdPromoValueMap: Map<string, number>
-): PromotionTypes.ComputeActions[] {
-  return getComputedActionsForItems(
-    promotion,
-    itemApplicationContext[TargetType.ITEMS],
-    methodIdPromoValueMap,
-    ApplicationMethodAllocation.ACROSS
-  )
-}
-
 function applyPromotionToItems(
   promotion: PromotionTypes.PromotionDTO,
   items:

packages/modules/promotion/src/utils/compute-actions/shipping-methods.ts

@@ -123,20 +123,13 @@ export function applyPromotionToShippingMethods(
       }
 
       const promotionValue = applicationMethod?.value ?? 0
-      const applicableTotal = method.subtotal
       const appliedPromoValue = methodIdPromoValueMap.get(method.id) ?? 0
+      const applicableTotal = MathBN.sub(method.subtotal, appliedPromoValue)
 
-      const div = MathBN.eq(totalApplicableValue, 0) ? 1 : totalApplicableValue
-      let applicablePromotionValue = MathBN.sub(
-        MathBN.mult(MathBN.div(applicableTotal, div), promotionValue),
-        appliedPromoValue
-      )
+      let applicablePromotionValue = MathBN.mult(MathBN.div(applicableTotal, totalApplicableValue), promotionValue)
 
       if (applicationMethod?.type === ApplicationMethodType.PERCENTAGE) {
-        applicablePromotionValue = MathBN.sub(
-          MathBN.mult(MathBN.div(promotionValue, 100), applicableTotal),
-          appliedPromoValue
-        )
+        applicablePromotionValue = MathBN.mult(MathBN.div(promotionValue, 100), applicableTotal)
       }
 
       const amount = MathBN.min(applicablePromotionValue, applicableTotal)