ste-core/dist/events/PromiseSubscription.js

Core files for the Strongly Typed Events project.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.PromiseSubscription = void 0;
/**
 * Subscription implementation for events with promises.
 *
 * @export
 * @class PromiseSubscription
 * @implements {ISubscription<TEventHandler>}
 * @template TEventHandler The type of event handler.
 */
class PromiseSubscription {
    /**
     * Creates an instance of PromiseSubscription.
     * @param {TEventHandler} handler The handler for the subscription.
     * @param {boolean} isOnce Indicates if the handler should only be executed once.
     *
     * @memberOf PromiseSubscription
     */
    constructor(handler, isOnce) {
        this.handler = handler;
        this.isOnce = isOnce;
        /**
         * Indicates if the subscription has been executed before.
         *
         * @memberOf PromiseSubscription
         */
        this.isExecuted = false;
    }
    /**
     * Executes the handler.
     *
     * @param {boolean} executeAsync True if the even should be executed async.
     * @param {*} scope The scope the scope of the event.
     * @param {IArguments} args The arguments for the event.
     *
     * @memberOf PromiseSubscription
     */
    async execute(executeAsync, scope, args) {
        if (!this.isOnce || !this.isExecuted) {
            this.isExecuted = true;
            //TODO: do we need to cast to any -- seems yuck
            var fn = this.handler;
            if (executeAsync) {
                setTimeout(() => {
                    fn.apply(scope, args);
                }, 1);
                return;
            }
            let result = fn.apply(scope, args);
            await result;
        }
    }
}
exports.PromiseSubscription = PromiseSubscription;