@arpinum/ddd/lib/domain/commandDecorators/broadcastEventsDecorator.js

DDD framework CQRS and ES friendly

const _ = require('lodash');
const t = require('tcomb');
const {Logger, LoggerContract} = require('@arpinum/log');
const {MessageBusContract} = require('../../types');

const Creation = t.interface({
  eventBus: MessageBusContract,
  options: t.maybe(t.interface({
    log: t.maybe(LoggerContract)
  }))
}, {strict: true});

function broadcastEventsDecorator(creation) {
  let {eventBus, options: rawOptions} = Creation(creation);
  let options = _.defaults({}, rawOptions, {
    log: new Logger({fileName: __filename})
  });

  return result => {
    options.log.debug('Broadcasting events');
    return eventBus.broadcastAll(result.events).then(() => result);
  };
}

module.exports = broadcastEventsDecorator;