text: function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) { symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); } keys.push.apply(keys, symbols); } return keys; }
  
  function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }
  
  function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
  
  import { reduce as dragOffset } from './dragOffset';
  import { reduce as dragOperation } from './dragOperation';
  import { reduce as refCount } from './refCount';
  import { reduce as dirtyHandlerIds } from './dirtyHandlerIds';
  import { reduce as stateId } from './stateId';
  import { get } from '../utils/js_utils';
  export function reduce() {
    var state = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
    var action = arguments.length > 1 ? arguments[1] : undefined;
    return {
      dirtyHandlerIds: dirtyHandlerIds(state.dirtyHandlerIds, {
        type: action.type,
        payload: _objectSpread(_objectSpread({}, action.payload), {}, {
          prevTargetIds: get(state, 'dragOperation.targetIds', [])
        })
      }),
      dragOffset: dragOffset(state.dragOffset, action),
      refCount: refCount(state.refCount, action),
      dragOperation: dragOperation(state.dragOperation, action),
      stateId: stateId(state.stateId)
    };
  }