chore: prevent workflow steps to call modules when not necessary (#11632)

**What**
Some steps were calling the modules even when nothing was needed which for some operations would create transaction for nothing leading to extra execution time that add up very quickly on cloud network

Co-authored-by: Carlos R. L. Rodrigues <37986729+carlos-r-l-rodrigues@users.noreply.github.com>

.changeset/good-bulldogs-sparkle.md

@@ -0,0 +1,6 @@
+---
+"@medusajs/core-flows": patch
+"@medusajs/cart": patch
+---
+
+chore(): Prevent workflow steps to even call modules when not necessary

packages/core/core-flows/src/cart/steps/add-shipping-method-to-cart.ts

@@ -33,8 +33,11 @@ export const addShippingMethodToCartStepId = "add-shipping-method-to-cart-step"
 export const addShippingMethodToCartStep = createStep(
   addShippingMethodToCartStepId,
   async (data: AddShippingMethodToCartStepInput, { container }) => {
-    const cartService = container.resolve<ICartModuleService>(Modules.CART)
+    if (!data.shipping_methods?.length) {
+      return new StepResponse([], [])
+    }
 
+    const cartService = container.resolve<ICartModuleService>(Modules.CART)
     const methods = await cartService.addShippingMethods(data.shipping_methods)
 
     return new StepResponse(methods, methods)

packages/core/core-flows/src/cart/steps/confirm-inventory.ts

@@ -60,6 +60,10 @@ export const confirmInventoryStepId = "confirm-inventory-step"
 export const confirmInventoryStep = createStep(
   confirmInventoryStepId,
   async (data: ConfirmVariantInventoryStepInput, { container }) => {
+    if (!data.items?.length) {
+      return new StepResponse([], [])
+    }
+
     const inventoryService = container.resolve<IInventoryService>(
       Modules.INVENTORY
     )

packages/core/core-flows/src/cart/steps/create-line-item-adjustments.ts

@@ -34,6 +34,11 @@ export const createLineItemAdjustmentsStep = createStep(
   createLineItemAdjustmentsStepId,
   async (data: CreateLineItemAdjustmentsCartStepInput, { container }) => {
     const { lineItemAdjustmentsToCreate = [] } = data
+
+    if (!lineItemAdjustmentsToCreate?.length) {
+      return new StepResponse([], [])
+    }
+
     const cartModuleService: ICartModuleService = container.resolve(
       Modules.CART
     )

packages/core/core-flows/src/cart/steps/create-payment-collection.ts

@@ -33,6 +33,10 @@ export const createPaymentCollectionsStepId = "create-payment-collections"
 export const createPaymentCollectionsStep = createStep(
   createPaymentCollectionsStepId,
   async (data: CreatePaymentCollectionCartStepInput, { container }) => {
+    if (!data?.length) {
+      return new StepResponse([], [])
+    }
+
     const service = container.resolve<IPaymentModuleService>(Modules.PAYMENT)
 
     const created = await service.createPaymentCollections(data)

packages/core/core-flows/src/cart/steps/create-shipping-method-adjustments.ts

@@ -33,6 +33,11 @@ export const createShippingMethodAdjustmentsStep = createStep(
   createShippingMethodAdjustmentsStepId,
   async (data: CreateShippingMethodAdjustmentsStepInput, { container }) => {
     const { shippingMethodAdjustmentsToCreate = [] } = data
+
+    if (!shippingMethodAdjustmentsToCreate?.length) {
+      return new StepResponse(void 0, [])
+    }
+
     const cartModuleService: ICartModuleService = container.resolve(
       Modules.CART
     )

packages/core/core-flows/src/cart/steps/get-actions-to-compute-from-promotions.ts

@@ -40,6 +40,7 @@ export const getActionsToComputeFromPromotionsStep = createStep(
   getActionsToComputeFromPromotionsStepId,
   async (data: GetActionsToComputeFromPromotionsStepInput, { container }) => {
     const { cart, promotionCodesToApply = [] } = data
+
     const promotionService = container.resolve<IPromotionModuleService>(
       Modules.PROMOTION
     )

packages/core/core-flows/src/cart/steps/get-line-item-actions.ts

@@ -56,11 +56,16 @@ export const getLineItemActionsStepId = "get-line-item-actions-step"
 export const getLineItemActionsStep = createStep(
   getLineItemActionsStepId,
   async (data: GetLineItemActionsStepInput, { container }) => {
+    if (!data.items.length) {
+      return new StepResponse({ itemsToCreate: [], itemsToUpdate: [] }, null)
+    }
+
     const cartModule = container.resolve<ICartModuleService>(Modules.CART)
 
+    const variantIds = data.items.map((d) => d.variant_id!)
     const existingVariantItems = await cartModule.listLineItems({
       cart_id: data.id,
-      variant_id: data.items.map((d) => d.variant_id!),
+      variant_id: variantIds,
     })
 
     const variantItemMap = new Map<string, CartLineItemDTO>(
@@ -99,7 +104,8 @@ export const getLineItemActionsStep = createStep(
     }
 
     return new StepResponse(
-      { itemsToCreate, itemsToUpdate } as GetLineItemActionsStepOutput
+      { itemsToCreate, itemsToUpdate } as GetLineItemActionsStepOutput,
-    , null)
+      null
+    )
   }
 )

packages/core/core-flows/src/cart/steps/get-promotion-codes-to-apply.ts

@@ -84,12 +84,14 @@ export const getPromotionCodesToApply = createStep(
     })
 
     const promotionCodesToApply: Set<string> = new Set(
-      (
+      adjustmentCodes.length
+        ? (
             await promotionService.listPromotions(
               { code: adjustmentCodes },
               { select: ["code"] }
             )
           ).map((p) => p.code!)
+        : []
     )
 
     if (action === PromotionActions.ADD) {

packages/core/core-flows/src/cart/steps/get-variant-price-sets.ts

@@ -1,4 +1,7 @@
-import { CalculatedPriceSet, IPricingModuleService } from "@medusajs/framework/types"
+import {
+  CalculatedPriceSet,
+  IPricingModuleService,
+} from "@medusajs/framework/types"
 import { MedusaError, Modules } from "@medusajs/framework/utils"
 import { createStep, StepResponse } from "@medusajs/framework/workflows-sdk"
 

packages/core/core-flows/src/cart/steps/prepare-adjustments-from-promotion-actions.ts

@@ -107,6 +107,17 @@ export const prepareAdjustmentsFromPromotionActionsStep = createStep(
     )
 
     const { actions = [] } = data
+
+    if (!actions.length) {
+      return new StepResponse({
+        lineItemAdjustmentsToCreate: [],
+        lineItemAdjustmentIdsToRemove: [],
+        shippingMethodAdjustmentsToCreate: [],
+        shippingMethodAdjustmentIdsToRemove: [],
+        computedPromotionCodes: [],
+      } as PrepareAdjustmentsFromPromotionActionsStepOutput)
+    }
+
     const promotions = await promotionModuleService.listPromotions(
       { code: actions.map((a) => a.code) },
       { select: ["id", "code"] }

packages/core/core-flows/src/cart/steps/remove-line-item-adjustments.ts

@@ -20,6 +20,11 @@ export const removeLineItemAdjustmentsStep = createStep(
   removeLineItemAdjustmentsStepId,
   async (data: RemoveLineItemAdjustmentsStepInput, { container }) => {
     const { lineItemAdjustmentIdsToRemove = [] } = data
+
+    if (!lineItemAdjustmentIdsToRemove?.length) {
+      return new StepResponse(void 0, [])
+    }
+
     const cartModuleService: ICartModuleService = container.resolve(
       Modules.CART
     )

packages/core/core-flows/src/cart/steps/remove-shipping-method-adjustments.ts

@@ -21,6 +21,11 @@ export const removeShippingMethodAdjustmentsStep = createStep(
   removeShippingMethodAdjustmentsStepId,
   async (data: RemoveShippingMethodAdjustmentsStepInput, { container }) => {
     const { shippingMethodAdjustmentIdsToRemove = [] } = data
+
+    if (!shippingMethodAdjustmentIdsToRemove?.length) {
+      return new StepResponse(void 0, [])
+    }
+
     const cartModuleService: ICartModuleService = container.resolve(
       Modules.CART
     )

packages/core/core-flows/src/cart/steps/reserve-inventory.ts

@@ -61,8 +61,14 @@ export const reserveInventoryStepId = "reserve-inventory-step"
 export const reserveInventoryStep = createStep(
   reserveInventoryStepId,
   async (data: ReserveVariantInventoryStepInput, { container }) => {
-    const inventoryService = container.resolve(Modules.INVENTORY)
+    if (!data.items.length) {
+      return new StepResponse([], {
+        reservations: [],
+        inventoryItemIds: [],
+      })
+    }
 
+    const inventoryService = container.resolve(Modules.INVENTORY)
     const locking = container.resolve(Modules.LOCKING)
 
     const inventoryItemIds: string[] = []

packages/core/core-flows/src/cart/steps/update-cart-promotions.ts

@@ -35,6 +35,7 @@ export const updateCartPromotionsStep = createStep(
   updateCartPromotionsStepId,
   async (data: UpdateCartPromotionStepInput, { container }) => {
     const { promo_codes = [], id, action = PromotionActions.ADD } = data
+
     const remoteLink = container.resolve(ContainerRegistrationKeys.LINK)
     const remoteQuery = container.resolve(
       ContainerRegistrationKeys.REMOTE_QUERY
@@ -55,14 +56,15 @@ export const updateCartPromotionsStep = createStep(
       existingCartPromotionLinks.map((link) => [link.promotion_id, link])
     )
 
+    const linksToCreate: any[] = []
+    const linksToDismiss: any[] = []
+
+    if (promo_codes?.length) {
       const promotions = await promotionService.listPromotions(
         { code: promo_codes },
         { select: ["id"] }
       )
 
-    const linksToCreate: any[] = []
-    const linksToDismiss: any[] = []
-
       for (const promotion of promotions) {
         const linkObject = {
           [Modules.CART]: { cart_id: id },
@@ -81,6 +83,7 @@ export const updateCartPromotionsStep = createStep(
           }
         }
       }
+    }
 
     if (action === PromotionActions.REPLACE) {
       for (const link of existingCartPromotionLinks) {

packages/modules/cart/src/services/cart-module.ts

@@ -1083,10 +1083,9 @@ export default class CartModuleService
       )
     }
 
-    const result = await this.lineItemTaxLineService_.upsert(
+    const result = taxLines.length
-      taxLines,
+      ? await this.lineItemTaxLineService_.upsert(taxLines, sharedContext)
-      sharedContext
+      : []
-    )
 
     return await this.baseRepository_.serialize<CartTypes.LineItemTaxLineDTO[]>(
       result,
@@ -1201,10 +1200,12 @@ export default class CartModuleService
       )
     }
 
-    const result = await this.shippingMethodTaxLineService_.upsert(
+    const result = taxLines.length
+      ? await this.shippingMethodTaxLineService_.upsert(
           taxLines as UpdateShippingMethodTaxLineDTO[],
           sharedContext
         )
+      : []
 
     return await this.baseRepository_.serialize<
       CartTypes.ShippingMethodTaxLineDTO[]