feat!: affine cloud support (#3813)

Co-authored-by: Hongtao Lye <codert.sn@gmail.com>
Co-authored-by: liuyi <forehalo@gmail.com>
Co-authored-by: LongYinan <lynweklm@gmail.com>
Co-authored-by: X1a0t <405028157@qq.com>
Co-authored-by: JimmFly <yangjinfei001@gmail.com>
Co-authored-by: Peng Xiao <pengxiao@outlook.com>
Co-authored-by: xiaodong zuo <53252747+zuoxiaodong0815@users.noreply.github.com>
Co-authored-by: DarkSky <25152247+darkskygit@users.noreply.github.com>
Co-authored-by: Qi <474021214@qq.com>
Co-authored-by: danielchim <kahungchim@gmail.com>

packages/workspace/src/affine/utils.ts

@@ -0,0 +1,45 @@
+import type { Doc as YDoc } from 'yjs';
+
+export type SubdocEvent = {
+  loaded: Set<YDoc>;
+  removed: Set<YDoc>;
+  added: Set<YDoc>;
+};
+
+export type UpdateHandler = (update: Uint8Array, origin: unknown) => void;
+export type SubdocsHandler = (event: SubdocEvent) => void;
+export type DestroyHandler = () => void;
+
+export type AwarenessChanges = Record<
+  'added' | 'updated' | 'removed',
+  number[]
+>;
+
+export function uint8ArrayToBase64(array: Uint8Array): Promise<string> {
+  return new Promise<string>(resolve => {
+    // Create a blob from the Uint8Array
+    const blob = new Blob([array]);
+
+    const reader = new FileReader();
+    reader.onload = function () {
+      const dataUrl = reader.result as string | null;
+      if (!dataUrl) {
+        resolve('');
+        return;
+      }
+      // The result includes the `data:` URL prefix and the MIME type. We only want the Base64 data
+      const base64 = dataUrl.split(',')[1];
+      resolve(base64);
+    };
+
+    reader.readAsDataURL(blob);
+  });
+}
+
+export function base64ToUint8Array(base64: string) {
+  const binaryString = atob(base64);
+  const binaryArray = binaryString.split('').map(function (char) {
+    return char.charCodeAt(0);
+  });
+  return new Uint8Array(binaryArray);
+}