feat(medusa-plugin-meilisearch): Update + improve Meilisearch plugin (#3377)

* feat(medusa-plugin-meilisearch): Upgrade meilisearch deps + migrate plugin to TS

* fix version

* Remove transaction base service from search service

* Create .changeset/strange-mails-pump.md

* Backward compatibility

* Address PR feedback

* Fix folder structure

* Update readme

* Move types

* fix deps

* Change version in changeset

---------

Co-authored-by: adrien2p <adrien.deperetti@gmail.com>

packages/medusa/src/subscribers/search-indexing.ts

@@ -1,29 +1,35 @@
-import EventBusService from "../services/event-bus"
-import { SEARCH_INDEX_EVENT } from "../loaders/search-index"
-import ProductService from "../services/product"
 import { indexTypes } from "medusa-core-utils"
-import { Product } from "../models"
 import { ISearchService } from "../interfaces"
+import ProductCategoryFeatureFlag from "../loaders/feature-flags/product-categories"
+import { SEARCH_INDEX_EVENT } from "../loaders/search-index"
+import { Product } from "../models"
+import EventBusService from "../services/event-bus"
+import ProductService from "../services/product"
+import { FlagRouter } from "../utils/flag-router"
 
 type InjectedDependencies = {
   eventBusService: EventBusService
   searchService: ISearchService
   productService: ProductService
+  featureFlagRouter: FlagRouter
 }
 
 class SearchIndexingSubscriber {
   private readonly eventBusService_: EventBusService
   private readonly searchService_: ISearchService
   private readonly productService_: ProductService
+  private readonly featureFlagRouter_: FlagRouter
 
   constructor({
     eventBusService,
     searchService,
     productService,
+    featureFlagRouter,
   }: InjectedDependencies) {
     this.eventBusService_ = eventBusService
     this.searchService_ = searchService
     this.productService_ = productService
+    this.featureFlagRouter_ = featureFlagRouter
 
     this.eventBusService_.subscribe(SEARCH_INDEX_EVENT, this.indexDocuments)
   }
@@ -54,36 +60,27 @@ class SearchIndexingSubscriber {
     lastSeenId: string,
     take: number
   ): Promise<Product[]> {
+    const relations = [
+      "variants",
+      "tags",
+      "type",
+      "collection",
+      "variants.prices",
+      "images",
+      "variants.options",
+      "options",
+    ]
+
+    if (
+      this.featureFlagRouter_.isFeatureEnabled(ProductCategoryFeatureFlag.key)
+    ) {
+      relations.push("categories")
+    }
+
     return await this.productService_.list(
       { id: { gt: lastSeenId } },
       {
-        select: [
-          "id",
-          "title",
-          "status",
-          "subtitle",
-          "description",
-          "handle",
-          "is_giftcard",
-          "discountable",
-          "thumbnail",
-          "profile_id",
-          "collection_id",
-          "type_id",
-          "origin_country",
-          "created_at",
-          "updated_at",
-        ],
-        relations: [
-          "variants",
-          "tags",
-          "type",
-          "collection",
-          "variants.prices",
-          "images",
-          "variants.options",
-          "options",
-        ],
+        relations,
         take: take,
         order: { id: "ASC" },
       }