@orca-fe/pocket/es/common-store/CommonStore.js

UI components by orca-team

function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
function _iterableToArrayLimit(r, l) { var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (null != t) { var e, n, i, u, a = [], f = !0, o = !1; try { if (i = (t = t.call(r)).next, 0 === l) { if (Object(t) !== t) return; f = !1; } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0); } catch (r) { o = !0, n = r; } finally { try { if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return; } finally { if (o) throw n; } } return a; } }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { _defineProperty(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == typeof i ? i : String(i); }
function _toPrimitive(t, r) { if ("object" != typeof t || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != typeof i) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
/* eslint-disable react-hooks/rules-of-hooks,@typescript-eslint/no-explicit-any */
import EventEmitter from 'events';
import { useEffect, useRef, useState } from 'react';
import { useMemorizedFn } from '@orca-fe/hooks';
export function shallowEquals(obj1, obj2) {
  if (obj1 === obj2) return true;
  if (obj1 && obj2 && typeof obj1 === 'object' && typeof obj2 === 'object') {
    var keys1 = Object.keys(obj1);
    var keys2 = Object.keys(obj2);
    if (keys1.length !== keys2.length) return false;
    for (var i = 0; i < keys1.length; i++) {
      var key = keys1[i];
      if (obj1[key] !== obj2[key]) return false;
    }
    return true;
  }
  return false;
}
export default class CommonStore {
  constructor(defaultState) {
    _defineProperty(this, "events", new EventEmitter());
    _defineProperty(this, "prevState", void 0);
    _defineProperty(this, "state", void 0);
    this.prevState = defaultState;
    this.state = defaultState;
  }
  setState(state) {
    this.prevState = this.state;
    this.state = _objectSpread(_objectSpread({}, this.state), state);
    this.events.emit('state-changed');
  }

  /**
   * 获取最新的状态
   */
  getState() {
    return this.state;
  }

  /**
   * 在函数组件中订阅状态变化
   */
  useState(callback = v => v) {
    var _useState = useState(() => callback(_objectSpread({}, this.state))),
      _useState2 = _slicedToArray(_useState, 2),
      store = _useState2[0],
      setStore = _useState2[1];
    var handler = useMemorizedFn(() => {
      // 事件变化，触发
      var newStore = callback(_objectSpread({}, this.state));
      if (!shallowEquals(store, newStore)) {
        setStore(newStore);
      }
    });
    useEffect(() => {
      this.events.on('state-changed', handler);
      return () => {
        this.events.off('state-changed', handler);
      };
    }, []);
    return store;
  }

  /**
   * 在函数中监听事件变化
   * @param eventName 事件名称
   * @param callback
   */
  useEventListener(eventName, callback) {
    var callbackFnRef = useRef(callback);
    useEffect(() => {
      var handler = (...args) => {
        callbackFnRef.current(...args);
      };
      this.events.on(eventName, handler);
      return () => {
        this.events.off(eventName, handler);
      };
    }, []);
  }
  useStateChangedListener(callback) {
    this.useEventListener('state-changed', () => {
      callback(this.prevState, this.state);
    });
  }
}