member_webapp/src/packages/target/store/modify/modify.reducer.ts

import {
    Actions,
    ActionType,
  } from './modify.action';

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

  import { Target } from '../../model';

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

      case ActionType.ModifySuccess: {
        return {
          ...state,
          error: null,
          pending: false,
          target: action.payload
        };
      }

      case ActionType.ModifyFailure: {
        return {
          ...state,
          error: action.payload,
          pending: false,
          target: null,
        };
      }

      default: {
        return state;
      }
    }
  }