ts-promisify-event-emitter

Another implementation of Event Emitter but with Promises

Install

$ npm install ts-promisify-event-emitter

Usage

Basic usage:

1import EventEmitterPromisified, {Message, Callback} from 'ts-promisify-event-emitter';
2
3// Result type
4interface IUser {
5  name: string;
6  lastname: string;
7}
8// Query type
9interface IQuery {
10  id: string;
11}
12
13async function getUserFromDatabase(id: string): Promise<IUser> {
14  // do something async
15  return {
16    name: 'Test',
17    lastname: 'Testing'
18  }
19}
20
21const events = new EventEmitterPromisified<IQuery, IUser>();
22
23const callback: Callback<IQuery, IUser> = async (message: Message<IQuery>): Promise<IUser> => {
24  const user: IUser = await getUserFromDatabase(message.payload.id);
25  return user;
26}
27
28events.on('getUser', callback);
29
30(async function start() {
31  const query: Message<IQuery> = {payload: {id: "ID-1234"}};
32  const [user] = await events.emit('getUser', query);
33  console.log(`The user is: Name=${user.name}, lastname=${user.lastname}.`);
34})();

Deno

1import EventEmitterPromisified, {Message, Callback} from 'https://alvarobg.com/deno/ts_promisfy_event_emitter/1.1.10/index.ts';
2
3

Contributing

All contributions are welcome.

License

MIT