From f5c44e1f0b04a85faa6bce0d3e31930d4071585f Mon Sep 17 00:00:00 2001
From: Achille Lacoin <achille.lacoin@gmail.com>
Date: Thu, 21 Jul 2022 20:31:29 +0000
Subject: [PATCH] add compressData and decompressData to the npm package

---
 src/packages/excalidraw/CHANGELOG.md |  5 +++++
 src/packages/excalidraw/README.md    | 23 +++++++++++++++++++++++
 src/packages/excalidraw/index.tsx    |  3 +++
 src/packages/utils.ts                |  2 ++
 4 files changed, 33 insertions(+)

diff --git a/src/packages/excalidraw/CHANGELOG.md b/src/packages/excalidraw/CHANGELOG.md
index 2e6e043ac..969e7189b 100644
--- a/src/packages/excalidraw/CHANGELOG.md
+++ b/src/packages/excalidraw/CHANGELOG.md
@@ -15,6 +15,11 @@ Please add the latest change on the top under the correct section.
 
 ### Excalidraw API
 
+#### Features
+
+- Added [`compressData`](https://github.com/excalidraw/excalidraw/blob/master/src/packages/excalidraw/README.md#compressData) and [`decompressData`](https://github.com/excalidraw/excalidraw/blob/master/src/packages/excalidraw/README.md#decompressData)
+- Added [`generateEncryptionKey`](https://github.com/excalidraw/excalidraw/blob/master/src/packages/excalidraw/README.md#generateEncryptionKey)
+
 #### Breaking Changes
 
 - `setToastMessage` API is now renamed to `setToast` API and the function signature is also updated [#5427](https://github.com/excalidraw/excalidraw/pull/5427). You can also pass `duration` and `closable` attributes along with `message`.
diff --git a/src/packages/excalidraw/README.md b/src/packages/excalidraw/README.md
index 3025a9da4..47bae6d12 100644
--- a/src/packages/excalidraw/README.md
+++ b/src/packages/excalidraw/README.md
@@ -1150,6 +1150,29 @@ loadSceneOrLibraryFromBlob(
 
 This function loads either scene or library data from the supplied blob. If the blob contains scene data, and you pass `localAppState`, `localAppState` value will be preferred over the `appState` derived from `blob`. Throws if blob doesn't contain neither valid scene data or library data.
 
+#### `compressData`
+
+```js
+const encrytionKey = generateEncryptionKey();
+
+const buffer = await compressData(
+  new TextEncoder().encode(
+    serializeAsJSON(elements, appState, files, "database"),
+  ),
+  { encryptionKey },
+);
+```
+
+#### `decompressData`
+
+```js
+const { data: decodedBuffer } = await decompressData(new Uint8Array(payload), {
+  decryptionKey,
+});
+```
+
+#### `generateEncryptionKey`
+
 #### `getFreeDrawSvgPath`
 
 **How to use**
diff --git a/src/packages/excalidraw/index.tsx b/src/packages/excalidraw/index.tsx
index 7e0798f4d..a84b28d7a 100644
--- a/src/packages/excalidraw/index.tsx
+++ b/src/packages/excalidraw/index.tsx
@@ -206,6 +206,9 @@ export {
   getFreeDrawSvgPath,
   exportToClipboard,
   mergeLibraryItems,
+  generateEncryptionKey,
+  compressData,
+  decompressData,
 } from "../../packages/utils";
 export { isLinearElement } from "../../element/typeChecks";
 
diff --git a/src/packages/utils.ts b/src/packages/utils.ts
index 4d9a8af17..fa32d4014 100644
--- a/src/packages/utils.ts
+++ b/src/packages/utils.ts
@@ -193,6 +193,8 @@ export const exportToClipboard = async (
   }
 };
 
+export { decompressData, compressData } from "../data/encode";
+export { generateEncryptionKey } from "../data/encryption";
 export { serializeAsJSON, serializeLibraryAsJSON } from "../data/json";
 export {
   loadFromBlob,