feat(dashboard): add promotions to campaign UI (#7283)

* feat(core-flows,types,medusa): API to add promotions to campaign

* chore: consolidate specs

* chore: split workflows step into 2

* chore: fix tests

* chore: fix specs

* chore: add promotions to campaign UI

* chore: fix bug wrt to not refreshing

* chore: address review comments

packages/core/core-flows/src/promotion/steps/add-or-remove-campaign-promotions.ts

@@ -0,0 +1,64 @@
+import { ModuleRegistrationName } from "@medusajs/modules-sdk"
+import { IPromotionModuleService, LinkWorkflowInput } from "@medusajs/types"
+import { StepResponse, WorkflowData, createStep } from "@medusajs/workflows-sdk"
+
+export const addOrRemoveCampaignPromotionsStepId =
+  "add-or-remove-campaign-promotions"
+export const addOrRemoveCampaignPromotionsStep = createStep(
+  addOrRemoveCampaignPromotionsStepId,
+  async (input: WorkflowData<LinkWorkflowInput>, { container }) => {
+    const {
+      id: campaignId,
+      add: promotionIdsToAdd = [],
+      remove: promotionIdsToRemove = [],
+    } = input
+    const promotionModule = container.resolve<IPromotionModuleService>(
+      ModuleRegistrationName.PROMOTION
+    )
+
+    if (promotionIdsToAdd.length) {
+      await promotionModule.addPromotionsToCampaign({
+        id: campaignId,
+        promotion_ids: promotionIdsToAdd,
+      })
+    }
+
+    if (promotionIdsToRemove.length) {
+      await promotionModule.removePromotionsFromCampaign({
+        id: campaignId,
+        promotion_ids: promotionIdsToRemove,
+      })
+    }
+
+    return new StepResponse(null, input)
+  },
+  async (data, { container }) => {
+    if (!data) {
+      return
+    }
+
+    const {
+      id: campaignId,
+      add: promotionIdsToRemove = [],
+      remove: promotionIdsToAdd = [],
+    } = data
+
+    const promotionModule = container.resolve<IPromotionModuleService>(
+      ModuleRegistrationName.PROMOTION
+    )
+
+    if (promotionIdsToAdd.length) {
+      promotionModule.addPromotionsToCampaign({
+        id: campaignId,
+        promotion_ids: promotionIdsToAdd,
+      })
+    }
+
+    if (promotionIdsToRemove.length) {
+      promotionModule.removePromotionsFromCampaign({
+        id: campaignId,
+        promotion_ids: promotionIdsToRemove,
+      })
+    }
+  }
+)

packages/core/types/src/promotion/common/promotion.ts

@@ -51,6 +51,11 @@ export interface PromotionDTO {
    */
   rules?: PromotionRuleDTO[]
 
+  /**
+   * The associated campaign.
+   */
+  campaign_id?: string | null
+
   /**
    * The associated campaign.
    */