Initial work, copied from the Shopify provider

framework/saleor/utils/get-search-variables.ts

@@ -0,0 +1,27 @@
+import getSortVariables from './get-sort-variables'
+import type { SearchProductsInput } from '../product/use-search'
+
+export const getSearchVariables = ({
+  brandId,
+  search,
+  categoryId,
+  sort,
+}: SearchProductsInput) => {
+  let query = ''
+
+  if (search) {
+    query += `product_type:${search} OR title:${search} OR tag:${search}`
+  }
+
+  if (brandId) {
+    query += `${search ? ' AND ' : ''}vendor:${brandId}`
+  }
+
+  return {
+    categoryId,
+    query,
+    ...getSortVariables(sort, !!categoryId),
+  }
+}
+
+export default getSearchVariables