Update Vendure provider to latest API changes (#352)

Relates to #349

framework/vendure/api/operations/get-site-info.ts

@@ -0,0 +1,50 @@
+import { Provider, VendureConfig } from '../'
+import { GetCollectionsQuery } from '../../schema'
+import { arrayToTree } from '../../utils/array-to-tree'
+import { getCollectionsQuery } from '../../utils/queries/get-collections-query'
+import { OperationContext } from '@commerce/api/operations'
+import { Category } from '@commerce/types/site'
+
+export type GetSiteInfoResult<
+  T extends { categories: any[]; brands: any[] } = {
+    categories: Category[]
+    brands: any[]
+  }
+> = T
+
+export default function getSiteInfoOperation({
+  commerce,
+}: OperationContext<Provider>) {
+  async function getSiteInfo({
+    query = getCollectionsQuery,
+    variables,
+    config: cfg,
+  }: {
+    query?: string
+    variables?: any
+    config?: Partial<VendureConfig>
+    preview?: boolean
+  } = {}): Promise<GetSiteInfoResult> {
+    const config = commerce.getConfig(cfg)
+    // RecursivePartial forces the method to check for every prop in the data, which is
+    // required in case there's a custom `query`
+    const { data } = await config.fetch<GetCollectionsQuery>(query, {
+      variables,
+    })
+    const collections = data.collections?.items.map((i) => ({
+      ...i,
+      entityId: i.id,
+      path: i.slug,
+      productCount: i.productVariants.totalItems,
+    }))
+    const categories = arrayToTree(collections).children
+    const brands = [] as any[]
+
+    return {
+      categories: categories ?? [],
+      brands,
+    }
+  }
+
+  return getSiteInfo
+}