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# builds # builds
dist/ dist/
dist_*/ dist_web/
dist_serve/
dist_ts_web/
# custom # custom

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# gitzone ci_default
image: registry.gitlab.com/hosttoday/ht-docker-node:npmci
cache:
paths:
- .npmci_cache/
key: "$CI_BUILD_STAGE"
stages:
- security
- test
- release
- metadata
# ====================
# security stage
# ====================
mirror:
stage: security
script:
- npmci git mirror
tags:
- docker
- notpriv
snyk:
stage: security
script:
- npmci npm prepare
- npmci command npm install -g snyk
- npmci command npm install --ignore-scripts
- npmci command snyk test
tags:
- docker
- notpriv
# ====================
# test stage
# ====================
testStable:
stage: test
script:
- npmci npm prepare
- npmci node install stable
- npmci npm install
- npmci npm test
coverage: /\d+.?\d+?\%\s*coverage/
tags:
- docker
- priv
testBuild:
stage: test
script:
- npmci npm prepare
- npmci node install stable
- npmci npm install
- npmci command npm run build
coverage: /\d+.?\d+?\%\s*coverage/
tags:
- docker
- notpriv
release:
stage: release
script:
- npmci node install stable
- npmci npm publish
only:
- tags
tags:
- docker
- notpriv
# ====================
# metadata stage
# ====================
codequality:
stage: metadata
allow_failure: true
script:
- npmci command npm install -g tslint typescript
- npmci npm install
- npmci command "tslint -c tslint.json ./ts/**/*.ts"
tags:
- docker
- priv
trigger:
stage: metadata
script:
- npmci trigger
only:
- tags
tags:
- docker
- notpriv
pages:
image: hosttoday/ht-docker-dbase:npmci
services:
- docker:stable-dind
stage: metadata
script:
- npmci command npm install -g @gitzone/tsdoc
- npmci npm prepare
- npmci npm install
- npmci command tsdoc
tags:
- docker
- notpriv
only:
- tags
artifacts:
expire_in: 1 week
paths:
- public
allow_failure: true

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{
"version": "0.2.0",
"configurations": [
{
"command": "npm test",
"name": "Run npm test",
"request": "launch",
"type": "node-terminal"
}
]
}

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{
"json.schemas": [
{
"fileMatch": ["/npmextra.json"],
"schema": {
"type": "object",
"properties": {
"npmci": {
"type": "object",
"description": "settings for npmci"
},
"gitzone": {
"type": "object",
"description": "settings for gitzone",
"properties": {
"projectType": {
"type": "string",
"enum": ["website", "element", "service", "npm", "wcc"]
}
}
}
}
}
}
]
}

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# @pushrocks/smartpromise
simple promises and Deferred constructs
## Availabililty and Links
- [npmjs.org (npm package)](https://www.npmjs.com/package/@pushrocks/smartpromise)
- [gitlab.com (source)](https://gitlab.com/pushrocks/smartpromise)
- [github.com (source mirror)](https://github.com/pushrocks/smartpromise)
- [docs (typedoc)](https://pushrocks.gitlab.io/smartpromise/)
## Status for master
[![build status](https://gitlab.com/pushrocks/smartpromise/badges/master/build.svg)](https://gitlab.com/pushrocks/smartpromise/commits/master)
[![coverage report](https://gitlab.com/pushrocks/smartpromise/badges/master/coverage.svg)](https://gitlab.com/pushrocks/smartpromise/commits/master)
[![npm downloads per month](https://img.shields.io/npm/dm/@pushrocks/smartpromise.svg)](https://www.npmjs.com/package/@pushrocks/smartpromise)
[![Known Vulnerabilities](https://snyk.io/test/npm/@pushrocks/smartpromise/badge.svg)](https://snyk.io/test/npm/@pushrocks/smartpromise)
[![TypeScript](https://img.shields.io/badge/TypeScript->=%203.x-blue.svg)](https://nodejs.org/dist/latest-v10.x/docs/api/)
[![node](https://img.shields.io/badge/node->=%2010.x.x-blue.svg)](https://nodejs.org/dist/latest-v10.x/docs/api/)
[![JavaScript Style Guide](https://img.shields.io/badge/code%20style-prettier-ff69b4.svg)](https://prettier.io/)
## Usage
Use TypeScript for best in class instellisense.
> Note: smartq uses native ES6 promises
> smartq does not repeat any native functions, so for things like .all() simply use Promise.all()
```typescript
import * as q from '@pushrocks/smartpromise'
// Deferred
// -----------------------------------------------
let myAsyncFunction = (): Promise<string> => {
let done = q.defer<string>() // returns your typical Deferred object
setTimeout(() => {
done.resolve('hi') // will throw type error for other types than string as argument ;)
},6000);
console.log(done.status) // logs "pending";
done.promise.then(() => {
console.log(done.status) // logs "fullfilled"
console.log(done.duration) // logs the milliseconds between instantiation and fullfillment
})
return done.promise
}
let myAsyncFunction2 = async () => {
let aString = await myAsyncFunction()
console.log(aString) // will log 'hi' to console
}
myAsyncFunction2();
// Resolved and Rejected promises
// ------------------------------------------------
q.resolvedPromise(`I'll get logged to console soon`)
.then(x => {
console.log(x)
})
q.rejectedPromise(`what a lovely error message`)
.then(() => {
console.log('This never makes it to console')
}/*, alternatively put a reject function here */)
.catch(err => {
console.log(err)
})
// Promisify (typed)
// ------------------------------------------------
let myCallbackedFunction = (someString: string, someNumber: number, cb) => {
cb(null, someString)
}
let myPromisedFunction = q.promisify(myCallbackFunction)
myPromisedFunction('helloThere', 2).then(x => {
console.log(x) // will log 'helloThere' to console
})
```
For further information read the linked docs at the top of this readme.
> MIT licensed | **&copy;** [Lossless GmbH](https://lossless.gmbh)
> | By using this npm module you agree to our [privacy policy](https://lossless.gmbH/privacy)
[![repo-footer](https://lossless.gitlab.io/publicrelations/repofooter.svg)](https://maintainedby.lossless.com)

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# Changelog
## 2025-02-20 - 4.2.3 - fix(test)
Refactor test suite for improved readability and maintainability.
- Updated and cleaned up test cases for deferreds and promises.
- Reduced timeouts in tests for quicker execution.
- Added expectations for promise status and duration.
## 2025-02-20 - 4.2.3 - fix(test)
Refactor test suite for improved readability and maintainability.
- Updated and cleaned up test cases for deferreds and promises.
- Reduced timeouts in tests for quicker execution.
- Added expectations for promise status and duration.
## 2025-01-23 - 4.2.2 - fix(dependencies)
Update @git.zone/tstest and @types/node dependencies to latest versions
- Updated @git.zone/tstest from ^1.0.91 to ^1.0.92
- Updated @types/node from ^22.10.9 to ^22.10.10
## 2025-01-23 - 4.2.1 - fix(devDependencies)
Update development dependencies to latest versions
- Updated @git.zone/tstest to version ^1.0.91
- Updated @push.rocks/tapbundle to version ^5.5.6
- Updated @types/node to version ^22.10.9
## 2025-01-19 - 4.2.0 - feat(cumulativedeferred)
Added subDefer method to CumulativeDeferred
- Introduced `subDefer` method in CumulativeDeferred class to allow creating and adding new Deferreds easily.
## 2025-01-07 - 4.1.0 - feat(core)
Add fromCallback utility function for promisifying Node.js-style callback functions
- Added fromCallback function to convert Node.js-style callbacks into Promises.
## 2024-06-23 - 4.0.4 - fix(ci)
Remove .gitlab-ci.yml and update dependencies and metadata
- Removed .gitlab-ci.yml file
- Updated dependencies in package.json and npmextra.json
- Improved description and keywords for better package definition
## 2024-05-29 - 4.0.3 - Maintenance
Update project configuration and descriptions.
- Update project description
- Update tsconfig
- Update npmextra.json with githost field
## 2023-07-10 - 4.0.2 - Standards
Updates to adhere to new organizational standards.
- Switch to new org scheme
- Fix(core): update project settings
## 2023-04-17 - 4.0.0 - Major Release
Significant updates and switching to ESM.
- Fix(core): update project settings
## 2023-04-04 - 3.1.9 - Major Release
Breaking change: switch to ESM (ECMAScript Module).
## 2021-05-31 - 3.1.6 - Maintenance
Update project settings.
- Fix(core): update project settings
## 2021-04-23 - 3.1.4 - Maintenance
Update project settings.
- Fix(core): update project settings
## 2020-10-16 - 3.1.2 - Maintenance
Update project settings.
- Fix(core): update project settings
## 2020-10-15 - 3.0.9 - Feature
Added functionality for wrapping promises in timeouts.
- Feat(timeouts): allows the wrapping of promises in timeouts
## 2019-10-01 - 3.0.5 - Maintenance
Update project settings.
- Fix(core): update project settings
## 2019-03-26 - 3.0.0 - Major Release
Breaking change: remove util dependency.
- BREAKING CHANGE(remove util dependency and promisify functionality): update
## 2018-07-03 - 2.0.2 - Dependencies
Project now has zero dependencies.
- Fix(core): now has 0 dependencies
## 2018-03-16 - 1.1.8 - Major Release
Breaking change: switch scope to pushrocks.
- BREAKING CHANGE(scope): switch scope to pushrocks
## 2017-07-27 - 1.1.7 - Standards
Update to latest coding standards.
- Update to latest standards
## 2017-07-06 - 1.1.4 - Features and Improvements
Added polyfill and npmextra.json.
- Add polyfill
- Add npmextra.json
## 2017-07-06 - 1.1.2 - CI Maintenance
Updated continuous integration configuration.
- Update ci

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"npmAccessLevel": "public" "npmAccessLevel": "public"
}, },
"gitzone": { "gitzone": {
"projectType": "npm",
"module": { "module": {
"githost": "code.foss.global", "githost": "gitlab.com",
"gitscope": "push.rocks", "gitscope": "pushrocks",
"gitrepo": "smartpromise", "gitrepo": "smartpromise",
"description": "A TypeScript library for managing promises and Deferred constructs, simplifying asynchronous programming.", "shortDescription": "simple promises and Deferred constructs",
"npmPackagename": "@push.rocks/smartpromise", "npmPackagename": "@pushrocks/smartpromise",
"license": "MIT", "license": "MIT"
"keywords": [
"promise",
"deferred",
"async",
"promisify",
"cumulative deferred",
"timeout",
"typescript",
"asynchronous",
"utilities"
]
} }
},
"tsdoc": {
"legal": "\n## License and Legal Information\n\nThis repository contains open-source code that is licensed under the MIT License. A copy of the MIT License can be found in the [license](license) file within this repository. \n\n**Please note:** The MIT License does not grant permission to use the trade names, trademarks, service marks, or product names of the project, except as required for reasonable and customary use in describing the origin of the work and reproducing the content of the NOTICE file.\n\n### Trademarks\n\nThis project is owned and maintained by Task Venture Capital GmbH. The names and logos associated with Task Venture Capital GmbH and any related products or services are trademarks of Task Venture Capital GmbH and are not included within the scope of the MIT license granted herein. Use of these trademarks must comply with Task Venture Capital GmbH's Trademark Guidelines, and any usage must be approved in writing by Task Venture Capital GmbH.\n\n### Company Information\n\nTask Venture Capital GmbH \nRegistered at District court Bremen HRB 35230 HB, Germany\n\nFor any legal inquiries or if you require further information, please contact us via email at hello@task.vc.\n\nBy using this repository, you acknowledge that you have read this section, agree to comply with its terms, and understand that the licensing of the code does not imply endorsement by Task Venture Capital GmbH of any derivative works.\n"
} }
} }

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{ {
"name": "@push.rocks/smartpromise", "name": "@pushrocks/smartpromise",
"private": false, "private": false,
"version": "4.2.3", "version": "3.0.5",
"description": "A TypeScript library for managing promises and Deferred constructs, simplifying asynchronous programming.", "description": "simple promises and Deferred constructs",
"main": "dist_ts/index.js", "main": "dist/index.js",
"typings": "dist_ts/index.d.ts", "typings": "dist/index.d.ts",
"scripts": { "scripts": {
"test": "(tstest test/ --web)", "test": "(tstest test/)",
"build": "(tsbuild --web --allowimplicitany)", "build": "(tsbuild)"
"buildDocs": "tsdoc"
}, },
"repository": { "repository": {
"type": "git", "type": "git",
"url": "https://code.foss.global/push.rocks/smartpromise.git" "url": "git+ssh://git@gitlab.com/pushrocks/smartq.git"
}, },
"author": "Lossless GmbH", "author": "Lossless GmbH",
"license": "MIT", "license": "MIT",
"bugs": { "bugs": {
"url": "https://gitlab.com/pushrocks/smartq/issues" "url": "https://gitlab.com/pushrocks/smartq/issues"
}, },
"homepage": "https://code.foss.global/push.rocks/smartpromise", "homepage": "https://gitlab.com/pushrocks/smartq#README",
"dependencies": {},
"devDependencies": { "devDependencies": {
"@git.zone/tsbuild": "^2.2.0", "@gitzone/tsbuild": "^2.1.17",
"@git.zone/tsrun": "^1.3.3", "@gitzone/tstest": "^1.0.24",
"@git.zone/tstest": "^1.0.92", "@pushrocks/tapbundle": "^3.0.13",
"@push.rocks/tapbundle": "^5.5.6", "@types/node": "^12.7.5",
"@types/node": "^22.10.10" "tslint": "^5.20.0",
"tslint-config-prettier": "^1.18.0"
}, },
"files": [ "files": [
"ts/**/*", "ts/*",
"ts_web/**/*", "ts_web/*",
"dist/**/*", "dist/*",
"dist_*/**/*", "dist_web/*",
"dist_ts/**/*", "dist_ts_web/*",
"dist_ts_web/**/*", "assets/*",
"assets/**/*",
"cli.js", "cli.js",
"npmextra.json", "npmextra.json",
"readme.md" "readme.md"
], ]
"browserslist": [
"last 1 chrome versions"
],
"type": "module",
"keywords": [
"promise",
"deferred",
"async",
"promisify",
"cumulative deferred",
"timeout",
"typescript",
"asynchronous",
"utilities"
],
"pnpm": {
"onlyBuiltDependencies": [
"esbuild",
"mongodb-memory-server",
"puppeteer"
]
}
} }

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readme.md
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# @push.rocks/smartpromise
A library for simple promises and Deferred constructs with TypeScript support.
## Install
```bash
npm install @push.rocks/smartpromise --save
```
This module is designed to be used with TypeScript for the best developer experience, providing type safety and IntelliSense in your IDE.
## Usage
`@push.rocks/smartpromise` simplifies the use of promises and deferred constructs in TypeScript, offering a set of utility functions that extend native Promise capabilities in specific scenarios. This guide walks you through its functionalities, showcasing how to leverage this library in a TypeScript project.
### Setting Up Your Project
Ensure your TypeScript project is configured to support ES Module syntax. In your `tsconfig.json`, you should have:
```json
{
"compilerOptions": {
"module": "ESNext",
"target": "ESNext",
"moduleResolution": "node"
}
}
```
### Basic Usage
#### Creating a Deferred
Deferred objects in `@push.rocks/smartpromise` give you more control over your promises, allowing for manual resolution or rejection beyond the initial executor function.
```typescript
import { defer } from '@push.rocks/smartpromise';
async function exampleDeferred(): Promise<string> {
const myDeferred = defer<string>();
// Simulate an async task
setTimeout(() => {
myDeferred.resolve('Hello, Deferred!');
}, 1000);
return myDeferred.promise;
}
exampleDeferred().then((result) => console.log(result));
```
#### Cumulative Deferred
For scenarios where multiple asynchronous tasks need to be tracked collectively before proceeding, use `CumulativeDeferred`. It waits for all added promises to resolve.
```typescript
import { cumulativeDefer } from '@push.rocks/smartpromise';
async function exampleCumulativeDeferred() {
const myCumulativeDeferred = cumulativeDefer();
for (let i = 0; i < 5; i++) {
myCumulativeDeferred.addPromise(new Promise((resolve) => setTimeout(resolve, 1000 * i)));
}
await myCumulativeDeferred.promise;
console.log('All tasks completed!');
}
exampleCumulativeDeferred();
```
#### Utilizing Resolved and Rejected Promises
Quickly create already resolved or rejected promises for testing or initialization purposes.
```typescript
import { resolvedPromise, rejectedPromise } from '@push.rocks/smartpromise';
resolvedPromise('immediately resolved').then(console.log);
rejectedPromise('immediately rejected').catch(console.error);
```
### Advanced Use Cases
#### Promisify Callback Functions
`@push.rocks/smartpromise` does not directly provide a `promisify` function like Node.js `util` module, but you can easily integrate existing functions or use third-party libraries to convert callback-based functions into promises.
#### Handling Timeouts and Continuations
Managing timeouts or long-running promises gets easier with helper functions.
```typescript
import { timeoutWrap, timeoutAndContinue } from '@push.rocks/smartpromise';
async function exampleTimeout() {
const myPromise = new Promise((resolve) => setTimeout(() => resolve('Done!'), 2000));
// Will reject if the promise does not resolve within 1 second
try {
const result = await timeoutWrap(myPromise, 1000);
console.log(result);
} catch (error) {
console.error('Promise timed out');
}
// Continues after 1 second, regardless of whether the promise has resolved
const result = await timeoutAndContinue(myPromise, 1000);
console.log(result); // May log `null` if the original promise did not resolve in time
}
exampleTimeout();
```
#### Map and Reduce Asynchronous Functions
Suppose you have a collection of items that you need to process asynchronously. You can use the `map` function to apply an asynchronous function to each item in the array and wait for all the promises to resolve.
```typescript
import { map } from '@push.rocks/smartpromise';
async function processData(items: string[]): Promise<string[]> {
return map(items, async (item) => {
// Simulate an async operation
await new Promise((resolve) => setTimeout(resolve, 100));
return item.toUpperCase();
});
}
processData(['hello', 'world']).then(console.log);
```
### Handling Complex Promise Scenarios
#### Managing Multiple Deferreds
If you have multiple deferred objects and you want to manage them collectively, you can do so using the `CumulativeDeferred` class. This is especially useful when you have a dynamic number of deferreds to resolve.
```typescript
import { defer, cumulativeDefer } from '@push.rocks/smartpromise';
async function exampleComplexDeferred(): Promise<void> {
const task1 = defer<string>();
const task2 = defer<string>();
const cumulative = cumulativeDefer();
cumulative.addPromise(task1.promise);
cumulative.addPromise(task2.promise);
// Simulate async tasks
setTimeout(() => task1.resolve('Task 1 complete'), 1000);
setTimeout(() => task2.resolve('Task 2 complete'), 2000);
await cumulative.promise;
console.log('All tasks completed');
}
exampleComplexDeferred();
```
### Other Utilities
#### Race Condition Handling with `getFirstTrueOrFalse`
This helper function resolves immediately when one of the provided promises resolves to `true` or when all promises are resolved to `false`.
```typescript
import { getFirstTrueOrFalse } from '@push.rocks/smartpromise';
async function exampleRaceCondition() {
const task1 = new Promise<boolean>((resolve) => setTimeout(() => resolve(true), 1000));
const task2 = new Promise<boolean>((resolve) => setTimeout(() => resolve(false), 2000));
const result = await getFirstTrueOrFalse([task1, task2]);
console.log(result); // Outputs: true
}
exampleRaceCondition();
```
### Complete Use Case
Let's create a comprehensive example that showcases multiple features of `@push.rocks/smartpromise`.
```typescript
import {
defer,
cumulativeDefer,
resolvedPromise,
rejectedPromise,
timeoutWrap,
timeoutAndContinue,
map,
getFirstTrueOrFalse,
} from '@push.rocks/smartpromise';
async function completeUseCaseExample() {
console.log('Starting Complete Use Case Example!');
// Using Deferred
const myDeferred = defer<string>();
setTimeout(() => myDeferred.resolve('Deferred Resolved!'), 500);
console.log(await myDeferred.promise); // Outputs: "Deferred Resolved!"
// Using Cumulative Deferred
const myCumulativeDeferred = cumulativeDefer();
myCumulativeDeferred.addPromise(new Promise((resolve) => setTimeout(() => resolve('Task 1'), 1000)));
myCumulativeDeferred.addPromise(new Promise((resolve) => setTimeout(() => resolve('Task 2'), 2000)));
await myCumulativeDeferred.promise;
console.log('All cumulative tasks completed');
// Using Resolved and Rejected Promises
await resolvedPromise('Instant Resolve').then(console.log); // Outputs: "Instant Resolve"
await rejectedPromise('Instant Reject').catch(console.error); // Outputs: "Instant Reject"
// Using timeoutWrap
try {
const delayedPromise = new Promise((resolve) => setTimeout(() => resolve('Finished'), 3000));
const result = await timeoutWrap(delayedPromise, 1000);
console.log(result);
} catch (e) {
console.error('Timeout occurred'); // Outputs: "Timeout occurred"
}
// Using timeoutAndContinue
const resultContinue = await timeoutAndContinue(
new Promise((resolve) => setTimeout(() => resolve('Finished eventually'), 3000)),
1000
);
console.log(resultContinue); // Outputs: null (since it didn't resolve in 1 second)
// Using Map
const items = ['a', 'b', 'c'];
const processedItems = await map(items, async (item) => {
await new Promise((resolve) => setTimeout(resolve, 500));
return item.toUpperCase();
});
console.log(processedItems); // Outputs: ['A', 'B', 'C']
// Using getFirstTrueOrFalse
const raceResults = await getFirstTrueOrFalse([
new Promise<boolean>((resolve) => setTimeout(() => resolve(false), 1000)),
new Promise<boolean>((resolve) => setTimeout(() => resolve(true), 2000)),
]);
console.log(raceResults); // Outputs: true
console.log('Complete Use Case Example Finished!');
}
completeUseCaseExample();
```
### Testing Your Code
Testing is crucial to ensure the reliability of your asynchronous workflows. You can write tests using the `@push.rocks/tapbundle` library to create unit tests for your promises and deferred constructs.
```typescript
import { tap, expect } from '@push.rocks/tapbundle';
import * as smartpromise from '@push.rocks/smartpromise';
tap.test('should resolve a deferred promise', async () => {
const deferred = smartpromise.defer<string>();
deferred.resolve('Resolved!');
const result = await deferred.promise;
expect(result).toEqual('Resolved!');
});
tap.test('should timeout a long-running promise', async () => {
const longRunningPromise = new Promise((resolve) => setTimeout(resolve, 2000));
try {
await smartpromise.timeoutWrap(longRunningPromise, 1000);
} catch (err) {
expect(err.message).toEqual('timeout');
}
});
tap.test('should map async function to an array', async () => {
const inputArray = ['a', 'b'];
const result = await smartpromise.map(inputArray, async (item) => item.toUpperCase());
expect(result).toEqual(['A', 'B']);
});
tap.start();
```
By following this guide and using the examples provided, you should be able to effectively use `@push.rocks/smartpromise` for managing promises and deferred constructs in your TypeScript project. The library's extensive utility functions, combined with TypeScript support, make it a powerful tool for modern asynchronous programming needs.
Explore the full range of features and feel free to read through the source code to learn more about the implementation details. Happy coding!
## License and Legal Information
This repository contains open-source code that is licensed under the MIT License. A copy of the MIT License can be found in the [license](license) file within this repository.
**Please note:** The MIT License does not grant permission to use the trade names, trademarks, service marks, or product names of the project, except as required for reasonable and customary use in describing the origin of the work and reproducing the content of the NOTICE file.
### Trademarks
This project is owned and maintained by Task Venture Capital GmbH. The names and logos associated with Task Venture Capital GmbH and any related products or services are trademarks of Task Venture Capital GmbH and are not included within the scope of the MIT license granted herein. Use of these trademarks must comply with Task Venture Capital GmbH's Trademark Guidelines, and any usage must be approved in writing by Task Venture Capital GmbH.
### Company Information
Task Venture Capital GmbH
Registered at District court Bremen HRB 35230 HB, Germany
For any legal inquiries or if you require further information, please contact us via email at hello@task.vc.
By using this repository, you acknowledge that you have read this section, agree to comply with its terms, and understand that the licensing of the code does not imply endorsement by Task Venture Capital GmbH of any derivative works.

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import { expect, tap } from '@push.rocks/tapbundle';
import * as smartpromise from '../ts/index.js';
tap.test('should return a Deferred for .defer()', async () => {
const myDeferred = smartpromise.defer();
myDeferred.resolve();
await myDeferred.promise;
});
tap.test('should let types flow through the Promise', async () => {
const myString = 'someString';
const myDeferred = smartpromise.defer<string>();
myDeferred.resolve(myString);
const result = await myDeferred.promise;
expect(result).toEqual('someString');
});
tap.test('should map callbacks', async () => {
const inputArray = ['hi', 'awesome'];
const myPromisified = async (myInput) => {
return myInput;
};
const result = await smartpromise.map(inputArray, myPromisified);
expect(result).toEqual(inputArray);
});
export default tap.start();

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@ -1,57 +0,0 @@
import * as smartpromise from '../ts/index.js';
import { tap, expect } from '@push.rocks/tapbundle';
tap.test('simple deferred should resolve with correct value', async () => {
const done = smartpromise.defer<string>();
let result: string | undefined;
done.promise.then((stringArg) => {
result = stringArg;
});
done.resolve('hello');
await done.promise;
expect(result).toEqual('hello');
});
tap.test('deferred should work with async functions and track status/duration', async () => {
const myAsyncFunction = async (): Promise<string> => {
const done = smartpromise.defer<string>();
setTimeout(() => {
done.resolve('hi');
}, 100); // reduced timeout for testing
expect(done.status).toEqual('pending');
await done.promise;
expect(done.status).toEqual('fulfilled');
expect(done.duration).toBeGreaterThan(0);
return done.promise;
};
const result = await myAsyncFunction();
expect(result).toEqual('hi');
});
tap.test('resolvedPromise should resolve immediately with correct value', async () => {
const message = `I'll get logged to console soon`;
const result = await smartpromise.resolvedPromise(message);
expect(result).toEqual(message);
});
tap.test('rejectedPromise should reject with correct error message', async () => {
const errorMessage = 'what a lovely error message';
let caught = false;
try {
await smartpromise.rejectedPromise(errorMessage);
} catch (err) {
caught = true;
expect(err).toEqual(errorMessage);
}
expect(caught).toEqual(true);
});
export default tap.start();

30
test/test.ts Normal file
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@ -0,0 +1,30 @@
import { expect, tap } from '@pushrocks/tapbundle';
import * as q from '../ts/index';
tap.test('should return a Deferred for .defer()', async () => {
let myDeferred = q.defer();
let expectPromise = expect(myDeferred.promise).to.eventually.be.fulfilled;
myDeferred.resolve();
return expectPromise;
});
tap.test('should let types flow through the Promise', async () => {
let myString = 'someString';
let myDeferred = q.defer<string>();
let expectPromise = expect(myDeferred.promise).to.eventually.equal('someString');
myDeferred.resolve(myString);
return expectPromise;
});
tap.test('should map callbacks', async () => {
let inputArray = ['hi', 'awesome'];
const myPromisified = async myInput => {
return myInput;
};
const expectPromise = expect(q.map(inputArray, myPromisified)).to.eventually.deep.equal(
inputArray
);
return expectPromise;
});
tap.start();

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@ -1,8 +0,0 @@
/**
* autocreated commitinfo by @push.rocks/commitinfo
*/
export const commitinfo = {
name: '@push.rocks/smartpromise',
version: '4.2.3',
description: 'A TypeScript library for managing promises and Deferred constructs, simplifying asynchronous programming.'
}

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@ -1,20 +1,62 @@
import { defer } from './smartpromise.classes.deferred.js'; export interface IResolve<T> {
(value?: T | PromiseLike<T>): void;
}
export * from './smartpromise.classes.cumulativedeferred.js'; export interface IReject {
export * from './smartpromise.classes.deferred.js'; (reason?: any): void;
}
export type TDeferredStatus = 'pending' | 'fulfilled' | 'rejected';
export class Deferred<T> {
public promise: Promise<T>;
public resolve: IResolve<T>;
public reject: IReject;
public status: TDeferredStatus;
public startedAt: number;
public stoppedAt: number;
public get duration(): number {
if (this.stoppedAt) {
return this.stoppedAt - this.startedAt;
} else {
return Date.now() - this.startedAt;
}
}
constructor() {
this.promise = new Promise<T>((resolve, reject) => {
this.resolve = (valueArg: T | PromiseLike<T>) => {
this.status = 'fulfilled';
this.stoppedAt = Date.now();
resolve(valueArg);
};
this.reject = (reason: any) => {
this.status = 'rejected';
this.stoppedAt = Date.now();
reject(reason);
};
this.startedAt = Date.now();
this.status = 'pending';
});
}
}
export let defer = <T>() => {
return new Deferred<T>();
};
/** /**
* Creates a new resolved promise for the provided value. * Creates a new resolved promise for the provided value.
*/ */
export const resolvedPromise = <T>(value?: T): Promise<T> => { export let resolvedPromise = <T>(value?: T): Promise<T> => {
return Promise.resolve(value); return Promise.resolve(value);
}; };
/** /**
* Creates a new rejected promise for the provided reason. * Creates a new rejected promise for the provided reason.
*/ */
export const rejectedPromise = (err) => { export let rejectedPromise = err => {
return Promise.reject(err); return Promise.reject(err);
}; };
@ -22,80 +64,16 @@ interface IAsyncFunction<T> {
(someArg: T): Promise<T>; (someArg: T): Promise<T>;
} }
/** export let map = async <T>(inputArg: T[], functionArg: IAsyncFunction<T>) => {
* accepts an array of inputs and a function that accepts the input. let promiseArray: Promise<any>[] = [];
* runs all items with the function and returns the result array when all items have run let resultArray = [];
* @param inputArg for (let item of inputArg) {
* @param functionArg let promise: Promise<any> = functionArg(item);
*/
export const map = async <T>(inputArg: T[], functionArg: IAsyncFunction<T>) => {
const promiseArray: Promise<any>[] = [];
const resultArray = [];
for (const item of inputArg) {
const promise: Promise<any> = functionArg(item);
promiseArray.push(promise); promiseArray.push(promise);
promise.then((x) => { promise.then(x => {
resultArray.push(x); resultArray.push(x);
}); });
} }
await Promise.all(promiseArray); await Promise.all(promiseArray);
return resultArray; return resultArray;
}; };
export const timeoutWrap = async <T = any>(
promiseArg: Promise<T>,
timeoutInMsArg: number,
rejectArg = true
) => {
return new Promise<T>((resolve, reject) => {
setTimeout(() => {
if (rejectArg) {
reject(new Error('timeout'));
} else {
resolve(null);
}
}, timeoutInMsArg);
promiseArg.then(resolve, reject);
});
};
export const timeoutAndContinue = async <T = any>(
promiseArg: Promise<T>,
timeoutInMsArg = 60000
) => {
return timeoutWrap(promiseArg, timeoutInMsArg, false);
};
export const getFirstTrueOrFalse = async (promisesArg: Promise<boolean>[]) => {
const done = defer<boolean>();
for (const promiseArg of promisesArg) {
promiseArg.then((resultArg) => {
if (resultArg === true) {
done.resolve(true);
}
});
}
Promise.all(promisesArg).then(() => {
done.resolve(false);
});
return done.promise;
};
/**
* Converts a Node.js-style callback-based function into a Promise.
* @param fn The function that expects a callback.
* @returns A Promise that resolves with the result of the function or rejects with an error.
*/
export const fromCallback = <T>(
fn: (callback: (err: NodeJS.ErrnoException | null, result?: T) => void) => void
): Promise<T> => {
return new Promise((resolve, reject) => {
fn((err, result) => {
if (err) {
reject(err); // Reject the promise with the error
} else {
resolve(result as T); // Resolve the promise with the result
}
});
});
};

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@ -1,32 +0,0 @@
import { defer } from "./smartpromise.classes.deferred.js";
export class CumulativeDeferred {
private accumulatedPromises: Promise<any>[] = [];
private deferred = defer();
public promise = this.deferred.promise;
constructor() {
setTimeout(async () => {
while (this.accumulatedPromises.length > 0) {
const poppedPromise = this.accumulatedPromises.shift();
await poppedPromise;
}
this.deferred.resolve();
}, 0);
}
public subDefer() {
const done = defer();
this.addPromise(done.promise);
return done;
}
public addPromise(promiseArg: Promise<any>) {
this.accumulatedPromises.push(promiseArg);
}
}
export const cumulativeDefer = () => {
return new CumulativeDeferred();
}

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@ -1,54 +0,0 @@
export interface IResolve<T> {
(value?: T | PromiseLike<T>): void;
}
export interface IReject {
(reason?: any): void;
}
export type TDeferredStatus = 'pending' | 'fulfilled' | 'rejected';
export class Deferred<T> {
public promise: Promise<T>;
public resolve: IResolve<T>;
public reject: IReject;
public status: TDeferredStatus;
public claimed = false;
public claim() {
if (this.claimed) {
throw new Error('Deferred already claimed');
}
this.claimed = true;
}
public startedAt: number;
public stoppedAt: number;
public get duration(): number {
if (this.stoppedAt) {
return this.stoppedAt - this.startedAt;
} else {
return Date.now() - this.startedAt;
}
}
constructor() {
this.promise = new Promise<T>((resolve, reject) => {
this.resolve = (valueArg: T | PromiseLike<T>) => {
this.status = 'fulfilled';
this.stoppedAt = Date.now();
resolve(valueArg);
};
this.reject = (reason: any) => {
this.status = 'rejected';
this.stoppedAt = Date.now();
reject(reason);
};
this.startedAt = Date.now();
this.status = 'pending';
});
}
}
export const defer = <T>() => {
return new Deferred<T>();
};

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@ -1,14 +0,0 @@
{
"compilerOptions": {
"experimentalDecorators": true,
"useDefineForClassFields": false,
"target": "ES2022",
"module": "NodeNext",
"moduleResolution": "NodeNext",
"esModuleInterop": true,
"verbatimModuleSyntax": true
},
"exclude": [
"dist_*/**/*.d.ts"
]
}

17
tslint.json Normal file
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@ -0,0 +1,17 @@
{
"extends": ["tslint:latest", "tslint-config-prettier"],
"rules": {
"semicolon": [true, "always"],
"no-console": false,
"ordered-imports": false,
"object-literal-sort-keys": false,
"member-ordering": {
"options":{
"order": [
"static-method"
]
}
}
},
"defaultSeverity": "warning"
}