Function revertToSnapshot

apps/client/src/code/pages/utils.ts:37–59

(doc: Y.Doc, snapshotUpdate: Uint8Array)

}

export function revertToSnapshot(doc: Y.Doc, snapshotUpdate: Uint8Array) {
  const auxDoc = createPageDoc();

  applyDocUpdate(auxDoc, snapshotUpdate);

  const currentStateVector = Y.encodeStateVector(doc);

  const snapshotStateVector = Y.encodeStateVector(auxDoc);
  const forwardUpdate = Y.encodeStateAsUpdateV2(doc, snapshotStateVector);

  const undoManager = new Y.UndoManager(
    [auxDoc.getMap('page'), auxDoc.getMap('notes'), auxDoc.getMap('arrows')],
    { trackedOrigins: new Set([null]) },
  );

  applyDocUpdate(auxDoc, forwardUpdate, null);

  undoManager.undo();

  const backwardUpdate = Y.encodeStateAsUpdateV2(auxDoc, currentStateVector);

  applyDocUpdate(doc, backwardUpdate, null);
}

export function getPageTitle(
  pageId: string,