feat: support migration (#2852)

packages/workspace/src/migration/index.ts

@@ -0,0 +1,51 @@
+import { migrateToSubdoc } from '@affine/env/blocksuite';
+import type { LocalWorkspace } from '@affine/env/workspace';
+import { WorkspaceFlavour } from '@affine/env/workspace';
+import { createEmptyBlockSuiteWorkspace } from '@affine/workspace/utils';
+import { nanoid, Workspace } from '@blocksuite/store';
+import { createIndexeddbStorage } from '@blocksuite/store';
+const Y = Workspace.Y;
+
+export function upgradeV1ToV2(oldWorkspace: LocalWorkspace): LocalWorkspace {
+  const oldDoc = oldWorkspace.blockSuiteWorkspace.doc;
+  const newDoc = migrateToSubdoc(oldDoc);
+  if (newDoc === oldDoc) {
+    console.warn('do not need update');
+    return oldWorkspace;
+  } else {
+    const id = nanoid();
+    const newBlockSuiteWorkspace = createEmptyBlockSuiteWorkspace(
+      id,
+      WorkspaceFlavour.LOCAL
+    );
+    Y.applyUpdate(newBlockSuiteWorkspace.doc, Y.encodeStateAsUpdate(newDoc));
+    newDoc.getSubdocs().forEach(subdoc => {
+      newBlockSuiteWorkspace.doc.getSubdocs().forEach(newDoc => {
+        if (subdoc.guid === newDoc.guid) {
+          Y.applyUpdate(newDoc, Y.encodeStateAsUpdate(subdoc));
+        }
+      });
+    });
+    console.log(newBlockSuiteWorkspace.doc.toJSON());
+
+    return {
+      blockSuiteWorkspace: newBlockSuiteWorkspace,
+      flavour: WorkspaceFlavour.LOCAL,
+      id,
+    };
+  }
+}
+
+export async function migrateLocalBlobStorage(from: string, to: string) {
+  const fromStorage = createIndexeddbStorage(from);
+  const toStorage = createIndexeddbStorage(to);
+  const keys = await fromStorage.crud.list();
+  for (const key of keys) {
+    const value = await fromStorage.crud.get(key);
+    if (!value) {
+      console.warn('cannot find blob:', key);
+      continue;
+    }
+    await toStorage.crud.set(key, value);
+  }
+}