Add basic Spree framework structure

framework/spree/utils/convertSpreeErrorToGraphQlError.ts

@@ -0,0 +1,46 @@
+import { FetcherError } from '@commerce/utils/errors'
+import { errors } from '@spree/storefront-api-v2-sdk'
+
+const convertSpreeErrorToGraphQlError = (
+  error: errors.SpreeError
+): FetcherError => {
+  if (error instanceof errors.ExpandedSpreeError) {
+    // Assuming error.errors[key] is a list of strings.
+
+    if ('base' in error.errors) {
+      const baseErrorMessage = error.errors.base as unknown as string
+
+      return new FetcherError({
+        status: error.serverResponse.status,
+        message: baseErrorMessage,
+      })
+    }
+
+    const fetcherErrors = Object.keys(error.errors).map((sdkErrorKey) => {
+      const errors = error.errors[sdkErrorKey] as string[]
+
+      return {
+        message: `${sdkErrorKey} ${errors.join(', ')}`,
+      }
+    })
+
+    return new FetcherError({
+      status: error.serverResponse.status,
+      errors: fetcherErrors,
+    })
+  }
+
+  if (error instanceof errors.BasicSpreeError) {
+    return new FetcherError({
+      status: error.serverResponse.status,
+      message: error.summary,
+    })
+  }
+
+  return new FetcherError({
+    status: error.serverResponse.status,
+    message: error.message,
+  })
+}
+
+export default convertSpreeErrorToGraphQlError