function rootReducer()

in frontend/src/store.js [36:77]

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

function rootReducer(state, action) {
  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 ? {...state[path[0]]} : null
      return swapIn(state, path[0], update(existing));
    }
    default:
      return appReducer(state, action);
  }
}