Function createCursorStore

packages/decap-cms-lib-util/src/Cursor.ts:63–76

(...args: {}[])

  - (actions: <array/List>, data: <object/Map>, meta: <optional object/Map>) -> cursor
*/
function createCursorStore(...args: {}[]) {
  const { actions, data, meta } =
    args.length === 1
      ? jsToMap(args[0]).toObject()
      : { actions: args[0], data: args[1], meta: args[2] };
  return Map({
    // actions are a Set, rather than a List, to ensure an efficient .has
    actions: Set(actions),

    // data and meta are Maps
    data: jsToMap(data),
    meta: jsToMap(meta).update(filterUnknownMetaKeys),
  }) as CursorStore;
}

function hasAction(store: CursorStore, action: string) {
  return store.hasIn(['actions', action]);