feat(medusa): Migrate SearchService to TS + add SearchInterface (#1922)

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

@@ -3,17 +3,17 @@ import { SEARCH_INDEX_EVENT } from "../loaders/search-index"
 import ProductService from "../services/product"
 import { indexTypes } from "medusa-core-utils"
 import { Product } from "../models"
-import { SearchService } from "../services"
+import { ISearchService } from "../interfaces"
 
 type InjectedDependencies = {
   eventBusService: EventBusService
-  searchService: SearchService
+  searchService: ISearchService<never>
   productService: ProductService
 }
 
 class SearchIndexingSubscriber {
   private readonly eventBusService_: EventBusService
-  private readonly searchService_: SearchService
+  private readonly searchService_: ISearchService<never>
   private readonly productService_: ProductService
 
   constructor({
@@ -29,7 +29,7 @@ class SearchIndexingSubscriber {
   }
 
   indexDocuments = async (): Promise<void> => {
-    const TAKE = this.searchService_?.options?.batch_size ?? 1000
+    const TAKE = (this.searchService_?.options?.batch_size as number) ?? 1000
     let hasMore = true
 
     let lastSeenId = ""