feat: universal upload

Implementation of a universal upload allowing for multiple storage backends
starting with `database` and `s3`.

Allows clients to put and retrieve files from either client or server using
a blend of client and server actions.

packages/lib/universal/upload/get-file.ts

@@ -0,0 +1,45 @@
+import { base64 } from '@scure/base';
+import { match } from 'ts-pattern';
+
+import { DocumentDataType } from '@documenso/prisma/client';
+
+import { getPresignGetUrl } from './server-actions';
+
+export type GetFileOptions = {
+  type: DocumentDataType;
+  data: string;
+};
+
+export const getFile = async ({ type, data }: GetFileOptions) => {
+  return await match(type)
+    .with(DocumentDataType.BYTES, () => getFileFromBytes(data))
+    .with(DocumentDataType.BYTES_64, () => getFileFromBytes64(data))
+    .with(DocumentDataType.S3_PATH, async () => getFileFromS3(data))
+    .exhaustive();
+};
+
+const getFileFromBytes = (data: string) => {
+  const encoder = new TextEncoder();
+
+  const binaryData = encoder.encode(data);
+
+  return binaryData;
+};
+
+const getFileFromBytes64 = (data: string) => {
+  const binaryData = base64.decode(data);
+
+  return binaryData;
+};
+
+const getFileFromS3 = async (key: string) => {
+  const { url } = await getPresignGetUrl(key);
+
+  const buffer = await fetch(url, {
+    method: 'GET',
+  }).then(async (res) => res.arrayBuffer());
+
+  const binaryData = new Uint8Array(buffer);
+
+  return binaryData;
+};