@coze/taro-api/dist/event-source/base.js

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import { Events } from '@tarojs/taro';
import { EventName } from './types';
export class BaseEventSource {
    events = new Events();
    isClosed = false;
    on(eventName, handler) {
        this.events.on(eventName, handler);
        return this;
    }
    off(eventName, handler) {
        if (!eventName) {
            this.events.off();
        }
        else if (!handler) {
            this.events.off(eventName);
        }
        else {
            this.events.off(eventName, handler);
        }
        return this;
    }
    trigger(eventName, args = {}) {
        // Success/Fail should only fired once
        if (this.isClosed &&
            (eventName === EventName.Success || eventName === EventName.Fail)) {
            return this;
        }
        if (eventName === EventName.Success || eventName === EventName.Fail) {
            this.isClosed = true;
        }
        const msg = {
            event: eventName,
            data: args.data,
            errMsg: args.errMsg,
        };
        this.events.trigger(eventName, msg);
        return this;
    }
}