feat(medusa,types): add promotion list/get endpoint (#6110)

what:

- adds get promotion endpoint (RESOLVES CORE-1677)
- adds list promotions endpoint (RESOLVES CORE-1676)
- uses new API routes

packages/medusa/src/api-v2/admin/promotions/[id]/route.ts

@@ -0,0 +1,16 @@
+import { ModuleRegistrationName } from "@medusajs/modules-sdk"
+import { IPromotionModuleService } from "@medusajs/types"
+import { MedusaRequest, MedusaResponse } from "../../../../types/routing"
+
+export const GET = async (req: MedusaRequest, res: MedusaResponse) => {
+  const promotionModuleService: IPromotionModuleService = req.scope.resolve(
+    ModuleRegistrationName.PROMOTION
+  )
+
+  const promotion = await promotionModuleService.retrieve(req.params.id, {
+    select: req.retrieveConfig.select,
+    relations: req.retrieveConfig.relations,
+  })
+
+  res.status(200).json({ promotion })
+}

packages/medusa/src/api-v2/admin/promotions/middlewares.ts

@@ -0,0 +1,35 @@
+import { MedusaV2Flag } from "@medusajs/utils"
+import { isFeatureFlagEnabled, transformQuery } from "../../../api/middlewares"
+import { MiddlewareRoute } from "../../../loaders/helpers/routing/types"
+import * as QueryConfig from "./query-config"
+import {
+  AdminGetPromotionsParams,
+  AdminGetPromotionsPromotionParams,
+} from "./validators"
+
+export const adminPromotionRoutesMiddlewares: MiddlewareRoute[] = [
+  {
+    matcher: "/admin/promotions*",
+    middlewares: [isFeatureFlagEnabled(MedusaV2Flag.key)],
+  },
+  {
+    method: ["GET"],
+    matcher: "/admin/promotions",
+    middlewares: [
+      transformQuery(
+        AdminGetPromotionsParams,
+        QueryConfig.listTransformQueryConfig
+      ),
+    ],
+  },
+  {
+    method: ["GET"],
+    matcher: "/admin/promotions/:id",
+    middlewares: [
+      transformQuery(
+        AdminGetPromotionsPromotionParams,
+        QueryConfig.retrieveTransformQueryConfig
+      ),
+    ],
+  },
+]

packages/medusa/src/api-v2/admin/promotions/query-config.ts

@@ -0,0 +1,26 @@
+export const defaultAdminPromotionRelations = ["campaign", "application_method"]
+export const allowedAdminPromotionRelations = [
+  ...defaultAdminPromotionRelations,
+]
+export const defaultAdminPromotionFields = [
+  "id",
+  "code",
+  "campaign",
+  "is_automatic",
+  "type",
+  "created_at",
+  "updated_at",
+  "deleted_at",
+]
+
+export const retrieveTransformQueryConfig = {
+  defaultFields: defaultAdminPromotionFields,
+  defaultRelations: defaultAdminPromotionRelations,
+  allowedRelations: allowedAdminPromotionRelations,
+  isList: false,
+}
+
+export const listTransformQueryConfig = {
+  ...retrieveTransformQueryConfig,
+  isList: true,
+}

packages/medusa/src/api-v2/admin/promotions/route.ts

@@ -0,0 +1,23 @@
+import { ModuleRegistrationName } from "@medusajs/modules-sdk"
+import { IPromotionModuleService } from "@medusajs/types"
+import { MedusaRequest, MedusaResponse } from "../../../types/routing"
+
+export const GET = async (req: MedusaRequest, res: MedusaResponse) => {
+  const promotionModuleService: IPromotionModuleService = req.scope.resolve(
+    ModuleRegistrationName.PROMOTION
+  )
+
+  const [promotions, count] = await promotionModuleService.listAndCount(
+    req.filterableFields,
+    req.listConfig
+  )
+
+  const { limit, offset } = req.validatedQuery
+
+  res.json({
+    count,
+    promotions,
+    offset,
+    limit,
+  })
+}

packages/medusa/src/api-v2/admin/promotions/validators.ts

@@ -0,0 +1,13 @@
+import { IsOptional, IsString } from "class-validator"
+import { FindParams, extendedFindParamsMixin } from "../../../types/common"
+
+export class AdminGetPromotionsPromotionParams extends FindParams {}
+
+export class AdminGetPromotionsParams extends extendedFindParamsMixin({
+  limit: 100,
+  offset: 0,
+}) {
+  @IsString()
+  @IsOptional()
+  code?: string
+}