botbuilder-azure/lib/doOnce.js

Azure extensions for Microsoft BotBuilder.

"use strict";
/**
 * @module botbuilder-azure
 */
/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.DoOnce = void 0;
/**
 * Task to perform only one time.
 */
class DoOnce {
    constructor() {
        this.task = {};
    }
    /**
     * Wait for the task to be executed.
     *
     * @param key Key of the task.
     * @param fn Function to perform.
     * @returns A promise representing the asynchronous operation.
     */
    waitFor(key, fn) {
        if (!this.task[key]) {
            this.task[key] = fn();
        }
        return this.task[key];
    }
}
exports.DoOnce = DoOnce;
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