headergroup.js

const init_state = [
  { id: 1, name: "药库", initialPos: {x: 80, y: 70}, target_type: 'RegionalDesign::Repo' },
  { id: 2, name: "药架", initialPos: {x: 80, y: 70 + 60}, target_type: 'RegionalDesign::DrugRepo' },
  { id: 3, name: "药架格", initialPos: {x: 80, y: 70 + 60 * 2}, target_type: 'RegionalDesign::DrugBrandreth' }
]

const headergroup = (state = init_state, action) => {
  switch (action.type) {
    case 'CLONE_ELEMENT':
      return [
        ...state,
        action.element
      ]
    case 'DELETE_LAST_ELEMENT':
      return [
        ...state.slice(0, -1),
      ]
    default:
      return state
  }
}

export default headergroup