initial provider (#2)

framework/medusa/fetcher.ts

@@ -0,0 +1,44 @@
+import { CommerceError } from '@commerce/utils/errors'
+import { Fetcher } from '@commerce/utils/types'
+import { callMedusa } from './utils/call-medusa'
+
+enum Query {
+  Auth = <any>'auth',
+  Carts = <any>'carts',
+  Customers = <any>'customers',
+  Errors = <any>'errors',
+  Orders = <any>'orders',
+  Products = <any>'products',
+  ReturnReasons = <any>'returnReasons',
+  Returns = <any>'returns',
+  ShippingOptions = <any>'shippingOptions',
+  Swaps = <any>'swaps',
+}
+
+export const fetcher: Fetcher = async ({ method, query, variables }) => {
+  if (!query) {
+    throw new CommerceError({ message: 'An argument for query is required' })
+  }
+
+  if (!Object.values(Query).includes(query!)) {
+    throw new CommerceError({
+      message: `${query} is not a valid method argument. Available queries are ${Object.keys(
+        Query
+      )
+        .map((k) => Query[k as any])
+        .join(', ')}`,
+    })
+  }
+
+  if (!method) {
+    throw new CommerceError({ message: 'An argument for method is required' })
+  }
+
+  const response = await callMedusa(method, query, variables)
+
+  if (response.statusText === 'OK') {
+    const { data } = response
+    return data
+  }
+  throw response
+}