siimee/backend/lib/routes/notification/index.js

const Joi = require('joi')
const apiSchema = require('../../schemas/api')
const errorSchema = require('../../schemas/errors')
const params = require('../../schemas/params')

const PassThrough = require('stream').PassThrough

const pluginConfig = {
    handlerType: 'notifictaion',
    docs: {
        description: 'subscribe',
        notes: 'Subscribe to notifications based on profile_id',
    },
}

const validators = {
    params: params.profileId,
}

module.exports = {
    method: 'GET',
    path: '/{profile_id}/subscribe',
    options: {
        ...pluginConfig.docs,
        tags: ['api'],
        auth: false,
        cors: true,
        handler: async (request, h) => {
            const { profile_id } = request.params

            const streamName = `${profile_id}.stonk`
            const allStreams =
                request.server.plugins['notification-plugin']['streams']
            allStreams[streamName] = new PassThrough({ objectMode: true })

            const msg = {
                profile_id,
                name: 'BDGRS',
                price: (500 + Math.floor(Math.random() * 100)).toString(),
                order: null,
                type: 'info',
            }

            // Write to the input stream
            msg.order = Math.floor(Math.random() * 2) === 1 ? 'BUY' : 'SELL'
            allStreams[streamName].write(msg)

            // h.event() Added at plugin registration
            // h is the toolkit
            return h.event(allStreams[streamName], h, { event: streamName })
        },

        /** Validate based on validators object */
        validate: {
            ...validators,
            failAction: 'log',
        },
    },
}