more adjustments

move indexing logic to plugin
remove loadToSearchEngine from ProductService
adjust medusa core accordingly

packages/medusa-plugin-meilisearch/src/utils/transform-products.js

@@ -0,0 +1,19 @@
+const keys = ["sku", "title", "upc", "ean", "mid_code", "hs_code"]
+const prefix = `variant`
+
+export const transformProduct = (product) => {
+  const initialObj = keys.reduce((obj, key) => {
+    obj[`${prefix}_${key}`] = []
+    return obj
+  }, {})
+
+  const flattenedFields = product.variants.reduce((obj, variant) => {
+    keys.forEach((k) => variant[k] && obj[`${prefix}_${k}`].push(variant[k]))
+    return obj
+  }, initialObj)
+
+  return {
+    ...product,
+    ...flattenedFields,
+  }
+}