mediateur

Easy-to-use library for implementing the mediator pattern

Getting started

Start by installing the mediateur library in your project with the following NPM command:

npm i mediateur

Then define a Message:

// createPerson.ts
import type { Message } from 'mediateur';

export type CreatePerson = Message<'CREATE_PERSON', {
  firstName: string;
  lastName: string;
  email: string;
  age: number;
}>

When your message is defined, you can create a dedicated async function to handle it using the MessageHandler type:

// createPerson.handler.ts
import type { MessageHandler } from 'mediateur';
import type { CreatePerson } from './createPerson.ts'

const createPersonHandler: MessageHandler<CreatePerson> = async (message) => {
  console.table(message);
  return Promise.resolve();
}

Finally, add the handler to the meditor with the register function, then execute the send function by using an instance corresponding to your message:

// app.ts
import { mediator } from 'mediateur';
import { CreatePerson } from './createPerson';
import { createPersonHandler } from 'createPerson.handler';

mediator.register('CREATE_PERSON', createPersonHandler);

(async () => {
  const message: CreatePerson = {
    type: 'CREATE_PERSON',
    data: {
      firstName: 'Anthony',
      lastName: 'Houston',
      email: '[email protected]',
      age: 30
    }
  }
  
  await mediator.send<CreatePerson>(message);
})();

This example is really basic, there is more to discover in the documentation.

Contributing

Before you contribute, please take a few minutes to read the contribution guidelines.

Code of Conduct

This project has adopted the code of conduct defined by the Contributor Covenant.