@deepjs/uni-pull/lib/pull-up.js

封装 uni-app 上拉加载 && 下拉刷新

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.PullUp = PullUp;
exports.pullUp = void 0;

var _qs = require("@deepjs/qs");

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

var defaultConfig = {
  pageNum: 'pageNum',
  pageLimit: 'pageLimit',
  needPagination: 'needPagination',
  totalPage: 'totalPage',
  hasNext: 'hasNext',
  lastId: 'lastId'
};

function PullUp() {
  var _listParamsDefault;

  var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

  var opts = _objectSpread(_objectSpread({}, defaultConfig), options); // 默认参数


  var listParamsDefault = (_listParamsDefault = {}, _defineProperty(_listParamsDefault, "".concat(opts.pageNum), 1), _defineProperty(_listParamsDefault, "".concat(opts.pageLimit), 10), _defineProperty(_listParamsDefault, "".concat(opts.needPagination), 1), _defineProperty(_listParamsDefault, "".concat(opts.lastId), ''), _listParamsDefault);
  return {
    data: function data() {
      return {
        listData: [],
        listStatus: 'more',
        // 接口参数
        listParams: {// [`${PAGE_LIMIT}`]: 10, // 可以修改默认值
        }
      };
    },
    // 上拉触底事件 默认 onReachBottomDistance=50
    onReachBottom: function onReachBottom(e) {
      this.loadNextPage();
    },
    methods: {
      // // 上拉触底事件 默认 onReachBottomDistance=50
      // onScrollToLower(e) {
      //   this.loadNextPage()
      // },
      resetList: function resetList() {
        this.listStatus = 'more';
        this.listData = [];
        this.listParams["".concat(opts.pageNum)] = 1;
        this.listParams["".concat(opts.lastId)] = '';
      },
      loadNextPage: function loadNextPage() {
        var _this = this;

        // 加载下一页
        if (this.listStatus !== 'more') return; // 正在 loading 或 over 了

        if (this.requestTask && this.requestTask.abort) {
          this.requestTask.abort();
        }

        this.listStatus = 'loading';
        this.listParams = _objectSpread(_objectSpread({
          hideLoading: true
        }, listParamsDefault), this.listParams);
        this.requestTask = this.listModel(this.listParams, function (res) {
          _this.requestTask = null;

          _this.dealListRes(res);
        }, function (err) {
          _this.requestTask = null;
          _this.listStatus = 'more';
          return _this.dealListErr(err);
        });
      },
      // 统一数据调用，需外部覆写，也可以这里 mock 数据
      listModel: function listModel(params, success, err) {// setTimeout(() => {
        //   success(mockData);
        // }, 1000);
        // const [...rest] = arguments
        // return requestTask
        // return this.$api.xxx.apply(this, rest) // return requestTask
      },
      dealListErr: function dealListErr(err) {},
      dealListRes: function dealListRes(res) {
        // 处理完去渲染数据后再将 loading 状态变更掉
        // 预处理数据，
        if (typeof this.preDealListRes === 'function') {
          res = this.preDealListRes(res);

          if (!res) {
            this.$showToast('preDealListRes 必须要返回 res');
            return;
          }
        }

        var _deepCopy = (0, _qs.deepCopy)(res),
            _deepCopy$data = _deepCopy.data,
            data = _deepCopy$data === void 0 ? {} : _deepCopy$data;

        var _data$list = data.list,
            list = _data$list === void 0 ? [] : _data$list;
        var pageNum = this.listParams["".concat(opts.pageNum)] || 1;
        var hasMore = data["".concat(opts.hasNext)] || data["".concat(opts.totalPage)] > pageNum; // TIP: 不允许存在这种情况，还有下页数据，但当前页却条数不足

        console.log('hasMore', hasMore);

        if (typeof this.dealList === 'function') {
          list = this.dealList(list);

          if (!list) {
            this.$showToast('dealList 必须要返回 list');
            return;
          }
        }

        this.listData = this.listData.concat((0, _qs.deepCopy)(list)); // console.log(this.listData);

        if (hasMore) {
          var len = list.length;

          if (len) {
            var last = list[len - 1] || {};
            this.listParams["".concat(opts.lastId)] = data["".concat(opts.lastId)] || last.id || '';
          }

          this.listParams["".concat(opts.pageNum)]++;
          this.listStatus = 'more';
        } else {
          this.listStatus = 'over';
        } // 最后无需数据参数


        if (typeof this.afterDealListRes === 'function') {
          this.afterDealListRes();
        } // TODO: aliapp $emit 一个非绑定的事件，会报错 这会影响其他组件的 change或 input 的$emit 操作吗？
        // this.$emit('list:complete');

      }
    }
  };
}

var pullUp = PullUp({
  pageNum: 'page_num',
  pageLimit: 'page_limit',
  needPagination: 'need_pagination',
  totalPage: 'total_page',
  hasNext: 'has_next',
  lastId: 'last_id'
});
exports.pullUp = pullUp;