model.ts

import { Reducer, AnyAction } from 'redux';
import { EffectsCommandMap } from 'dva';

import { ListItemDataType } from './data';
import { queryFakeList } from './service';

export interface IStateType {
  list: ListItemDataType[];
}

export type Effect = (
  action: AnyAction,
  effects: EffectsCommandMap & { select: <T>(func: (state: IStateType) => T) => T },
) => void;

export interface ModelType {
  namespace: string;
  state: IStateType;
  effects: {
    fetch: Effect;
    appendFetch: Effect;
  };
  reducers: {
    queryList: Reducer<IStateType>;
    appendList: Reducer<IStateType>;
  };
}

const Model: ModelType = {
  namespace: 'BLOCK_NAME_CAMEL_CASE',

  state: {
    list: [],
  },

  effects: {
    *fetch({ payload }, { call, put }) {
      const response = yield call(queryFakeList, payload);
      yield put({
        type: 'queryList',
        payload: Array.isArray(response) ? response : [],
      });
    },
    *appendFetch({ payload }, { call, put }) {
      const response = yield call(queryFakeList, payload);
      yield put({
        type: 'appendList',
        payload: Array.isArray(response) ? response : [],
      });
    },
  },

  reducers: {
    queryList(state, action) {
      return {
        ...state,
        list: action.payload,
      };
    },
    appendList(state, action) {
      return {
        ...state,
        list: state!.list.concat(action.payload),
      };
    },
  },
};

export default Model;