file-lane/lib/event/asyncEvent/AsyncEventDispatcher.js

File conversion tool, can be one-to-one, one to N, N to one

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
class AsyncEventDispatcher {
  _eventMap = (() => new Map())();
  async dispatch(event) {
    return new Promise(resolve => {
      const {
        type
      } = event;
      const callList = this.getCallList(type);
      let callCount = 0;
      if (callList) {
        for (let item of callList) {
          item(event, () => {
            callCount++;
            if (callCount === callList.length) {
              resolve();
            }
          });
        }
      }
    });
  }
  addEventListener(type, handler) {
    if (!this.hasListener(type)) {
      this._eventMap.set(type, []);
    }
    const callList = this.getCallList(type);
    if (callList && !callList.includes(handler)) {
      callList.push(handler);
    }
  }
  removeEventListener(type, handler) {
    if (!this.hasListener(type)) {
      return;
    }
    const callList = this.getCallList(type);
    if (callList) {
      const index = callList.indexOf(handler);
      if (index >= 0) {
        callList.splice(index, 1);
      }
    }
  }
  removeAllListener(type) {
    this._eventMap.delete(type);
  }
  clear() {
    this._eventMap.clear();
  }
  hasListener(type) {
    return this._eventMap.has(type);
  }
  getCallList(type) {
    return this._eventMap.get(type);
  }
}
var _default = exports.default = AsyncEventDispatcher;