function rootReducer()

in frontend/src/store.ts [66:105]

• 37 lines of code
• 10 McCabe index (conditional complexity)

function rootReducer(state: any, action: any) {
  switch (action.type) {
    case 'state/clearAll':
      // Keep the selected region, everything else will be retrieved again
      const keep = (({selectedRegion, sidebar, section}) => ({
        selectedRegion,
        sidebar,
        section,
      }))(state.app)
      return {...appReducer(undefined, action), app: keep}
    case 'state/store': {
      const {path, value} = action.payload
      if (path.length > 1) return recurseAction(state, action)
      return swapIn(state, path[0], value)
    }
    case 'state/clear': {
      const {path} = action.payload
      if (path.length > 1) return recurseAction(state, action)

      let ret = null
      if (Array.isArray(state)) {
        ret = [...state]
        ret.splice(path[0], 1)
      } else {
        ret = {...state}
        delete ret[path[0]]
      }
      return ret
    }
    case 'state/update': {
      const {path, update} = action.payload
      if (path.length > 1) return recurseAction(state, action)

      const existing = path[0] in state ? cloneDeep(state[path[0]]) : null
      return swapIn(state, path[0], update(existing))
    }
    default:
      return appReducer(state, action)
  }
}