messages.service.js

// Initializes the `messages` service on path `/messages`
const createService = require('feathers-nedb')
const createModel = require('../../models/messages.model')
const hooks = require('./messages.hooks')

module.exports = function (app) {
  const Model = createModel(app)
  const paginate = app.get('paginate')

  const options = {
    Model,
    paginate
  }

  // Initialize our service with any options it requires
  app.use('/messages', createService(options))

  // Get our initialized service so that we can register hooks
  const service = app.service('messages')

  service.hooks(hooks)

  // Override the default publish so we only send data within
  // these channels
  service.publish((data, hook) => {
    return app.channel(`userIds/${data.to}`)
  })
}