serverless-offline-edge-lambda/dist/utils/callback-promise.js

A plugin for the Serverless Framework that simulates the behavior of AWS CloudFront Edge Lambdas while developing offline.

"use strict";
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
exports.CallbackPromise = void 0;
const deferred_promise_1 = require("./deferred-promise");
/**
 * The `CallbackPromise` provides a mechanism for creating a promise that can be resolved or rejected
 * like a Node callback function.
 */
class CallbackPromise {
    constructor(strict = true) {
        this.promise = new deferred_promise_1.DeferredPromise();
        this.hasBeenCalled = false;
        this[_a] = 'Promise';
        this.callback = (err, result) => {
            if (strict && this.hasBeenCalled) {
                throw new Error('Callback has already been invoked');
            }
            this.hasBeenCalled = true;
            if (err) {
                this.promise.reject(err);
                return;
            }
            this.promise.resolve(result);
        };
    }
    then(onfulfilled, onrejected) {
        return this.promise.then(onfulfilled);
    }
    catch(onrejected) {
        return this.promise.catch(onrejected);
    }
    finally(onfinally) {
        return this.promise.finally(onfinally);
    }
}
exports.CallbackPromise = CallbackPromise;
_a = Symbol.toStringTag;
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