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import { INIT_COORDS, BEGIN_DRAG, HOVER, END_DRAG, DROP } from '../actions/dragDrop';
import { areCoordsEqual } from '../utils/equality';
var initialState = {
  initialSourceClientOffset: null,
  initialClientOffset: null,
  clientOffset: null
};
export default function dragOffset() {
  var state = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : initialState;
  var action = arguments.length > 1 ? arguments[1] : undefined;
  var payload = action.payload;

switch (action.type) {
    case INIT_COORDS:
    case BEGIN_DRAG:
      return {
        initialSourceClientOffset: payload.sourceClientOffset,
        initialClientOffset: payload.clientOffset,
        clientOffset: payload.clientOffset
      };

case HOVER:
      if (areCoordsEqual(state.clientOffset, payload.clientOffset)) {
        return state;
      }

return _objectSpread({}, state, {
        clientOffset: payload.clientOffset
      });

case END_DRAG:
    case DROP:
      return initialState;

default:
      return state;
  }
}