benjaminudoh10

import Redis from 'ioredis';

export class ReactionService {
  private redisClient: Redis

  constructor() {
    // connect to your redis instance first
    this.redisClient = new Redis()
  }

benjaminudoh10

#!/bin/bash

DIR_NAME=node-app-bootstrap;

function bootstrap_node_app() {
  if which node > /dev/null
    then
      mkdir $DIR_NAME;
      cd $DIR_NAME;
      npm init -y > /dev/null;

benjaminudoh10

import express, { Request, Response } from 'express';

const app = express();

app.use(express.json());

app.get('/health', (request: Request, response: Response) => {
  response
    .status(200)
    .json({

benjaminudoh10

import { Queue } from 'bullmq';

enum Queues {
  DEFAULT = 'default',
}

export default class QueueService {
  private queues: Record<string, Queue>;
  private defaultQueue: Queue;

benjaminudoh10

...
import DefaultProcessor from './processors.default';

enum JobType {
  PROCESS_PAYMENT = 'process-payment',
}

export default class QueueService {
  ...

benjaminudoh10

import { Job } from 'bullmq';
import { JobType, Queues } from '../enum/queue.enum';
import QueueService from '../services/queue.service';

// these enums should be in a separate file and exported
enum Queues {
  DEFAULT = 'default',
}

enum JobType {

benjaminudoh10

import express, { Request, Response } from 'express';

const app = express();

...

app.post('/process-payment', (request: Request, response: Response) => {
  const { cardNumber, cvv, cardExpiry } = request.body;
  const queue = new QueueService().getQueue(Queues.DEFAULT);

benjaminudoh10

...
import { createBullBoard } from 'bull-board';
import { BullMQAdapter } from 'bull-board/bullMQAdapter';

const app = express();

...

const defaultQueue = new QueueService().getQueue(Queues.DEFAULT);
if (defaultQueue) {

benjaminudoh10

import * as crypto from 'crypto';

function v4_uuid() {
  let rand_bytes = crypto.randomBytes(16);
  let rand_bytes_int = Uint8Array.from(rand_bytes);

  // replace 7th byte with 4 (0100)
  // & 0b00001111 replaces the first 4 bits with 0s
  // | 0b01000000 replaces the first 4 bits with 0100
  rand_bytes_int[6] = (rand_bytes_int[6] & 0b00001111) | 0b01000000;

benjaminudoh10

function lastDigit(str1, str2) {
  if (str2 === "1") return parseInt(str1[str1.length - 1])
  if (str2 === "0") return 1
  if (str1 === "0" && str2 === "0") return 1
  if (str1.endsWith("0")) return 0
  if (str1.endsWith("1")) return 1
  if (str1.endsWith("2")) {
    return [6, 2, 4, 8][str2 % 4]
  }
  if (str1.endsWith("3")) {