feat: exporting processFile to be used in studio (#1001)

* feat: exporting processFile to be used in studio

* chore: increasing unit test timeout to 30m

* Revert "chore: increasing unit test timeout to 30m"

This reverts commit 416eb71.

Author: Charles Shin

packages/codegen-ui-react/lib/utils/storage-manager.ts

@@ -0,0 +1,30 @@
+/*
+  Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+
+  Licensed under the Apache License, Version 2.0 (the "License").
+  You may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+ */
+
+import { StorageManagerProps } from '@aws-amplify/ui-react-storage';
+import { STORAGE_FILE_ALGO_TYPE } from './constants';
+
+export const processFile = async ({ file }: Parameters<NonNullable<StorageManagerProps['processFile']>>[0]) => {
+  const fileExtension = file.name.split('.').pop();
+  return file
+    .arrayBuffer()
+    .then((filebuffer) => window.crypto.subtle.digest(STORAGE_FILE_ALGO_TYPE, filebuffer))
+    .then((hashBuffer) => {
+      const hashArray = Array.from(new Uint8Array(hashBuffer));
+      const hashHex = hashArray.map((a) => a.toString(16).padStart(2, '0')).join('');
+      return { file, key: `${hashHex}.${fileExtension}` };
+    });
+};