@httpc/kit/dist/esm/events/EventBus.js

httpc toolbox for building function-based API with minimal code and end-to-end type safety

var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
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};
var __metadata = (this && this.__metadata) || function (k, v) {
    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
var __param = (this && this.__param) || function (paramIndex, decorator) {
    return function (target, key) { decorator(target, key, paramIndex); }
};
var EventBus_1;
import EventEmitter from "events";
import { singleton } from "tsyringe";
import { logger } from "../logging";
import { alias, KEY } from "../di";
import { BaseService } from "../services";
let EventBus = EventBus_1 = class EventBus extends BaseService() {
    constructor(logger) {
        //@ts-expect-error
        super(...arguments);
        this._isHold = false;
        this._holdEvents = [];
        this.events = new EventEmitter();
    }
    inTransaction(data) {
        const bus = new EventBus_1(this.logger);
        bus.hold();
        data.on("afterTransaction", () => bus.flush());
        return bus;
    }
    addListener(event, handler) {
        this.events.addListener(event, handler);
        return () => this.events.removeListener(event, handler);
    }
    publish(event) {
        this.logger.verbose("Emitted%s %s(%j)", this._isHold ? "(hold)" : "", event.$event_name, event);
        if (this._isHold) {
            this._holdEvents.push(event);
            return;
        }
        this.events.emit(event.$event_name, event);
    }
    hold() {
        this._isHold = true;
    }
    flush() {
        this._isHold = false;
        const events = this._holdEvents.splice(0, this._holdEvents.length);
        for (const event of events) {
            this.publish(event);
        }
    }
};
EventBus = EventBus_1 = __decorate([
    singleton(),
    alias(KEY("IEventBus")),
    __param(0, logger()),
    __metadata("design:paramtypes", [Object])
], EventBus);
export { EventBus };