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

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

import { Infra } from '@overflow/commons-typescript/model/infra';

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,
        infra: action.payload
      };
    }

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

    default: {
      return state;
    }
  }
}