member_webapp/@overflow/sensor/store/detail/detail.reducer.ts

import {
  Read,
  ReadFailure,
  ReadSuccess,
  ActionType,
  Actions,
} from './detail.action';

import {
  State,
  initialState,
} from './detail.state';

import { Sensor } from '@overflow/commons-typescript/model/sensor';


export function reducer(state = initialState, action: Actions): State {
  switch (action.type) {
    case ActionType.Read: {
      return {
        ...state,
        error: null,
        isPending: true,
      };
    }

    case ActionType.ReadSuccess: {
      return {
        ...state,
        error: null,
        isPending: false,
        sensor: action.payload,
      };
    }

    case ActionType.ReadFailure: {
      return {
        ...state,
        error: action.payload,
        isPending: false,
        sensor: null,
      };
    }

    default: {
      return state;
    }
  }
}