Files
Checkmate/Server/index.js

111 lines
3.2 KiB
JavaScript

const express = require("express");
const helmet = require("helmet");
const cors = require("cors");
const authRouter = require("./routes/authRoute");
const monitorRouter = require("./routes/monitorRoute");
const checkRouter = require("./routes/checkRoute");
const alertRouter = require("./routes/alertRoute");
const { connectDbAndRunServer } = require("./configs/db");
require("dotenv").config();
const logger = require("./utils/logger");
const { verifyJWT } = require("./middleware/verifyJWT");
const { handleErrors } = require("./middleware/handleErrors");
const queueRouter = require("./routes/queueRoute");
const JobQueue = require("./service/jobQueue");
// Need to wrap server setup in a function to handle async nature of JobQueue
const startApp = async () => {
// const { sendEmail } = require('./utils/sendEmail')
// **************************
// Here is where we can swap out DBs easily. Spin up a mongoDB instance and try it out.
// Simply comment out the FakeDB and uncomment the MongoDB or vice versa.
// We can easily swap between any type of data source as long as the methods are implemented
//
// FakeDB
// const db = require("./db/FakeDb");
//
// MongoDB
// const db = require("./db/MongoDB");
//
// **************************
const DB_TYPE = {
MongoDB: () => require("./db/MongoDB"),
FakedDB: () => require("./db/FakeDb"),
};
const db = DB_TYPE[process.env.DB_TYPE]
? DB_TYPE[process.env.DB_TYPE]()
: require("./db/FakeDb");
/**
* NOTES
* Email Service will be added
* Logger Service will be added (Winston or similar)
*/
const app = express();
// middlewares
app.use(
cors()
//We will add configuration later
);
app.use(express.json());
app.use(helmet());
// **************************
// Make DB accessible anywhere we have a Request object
// By adding the DB to the request object, we can access it in any route
// Thus we do not need to import it in every route file, and we can easily swap out DBs as there is only one place to change it
// Same applies for JobQueue
// **************************
app.use((req, res, next) => {
req.db = db;
req.jobQueue = jobQueue;
next();
});
//routes
app.use("/api/v1/auth", authRouter);
app.use("/api/v1/monitors", verifyJWT, monitorRouter);
app.use("/api/v1/checks", verifyJWT, checkRouter);
app.use("/api/v1/alerts", verifyJWT, alertRouter);
//Temporary route for testing, remove later
app.use("/api/v1/job", queueRouter);
//health check
app.use("/api/v1/healthy", (req, res) => {
try {
logger.info("Checking Health of the server.");
return res.status(200).json({ message: "Healthy" });
} catch (error) {
logger.error(error.message);
return res.status(500).json({ message: error.message });
}
});
/**
* Error handler middleware
* Should be called last
*/
app.use(handleErrors);
await connectDbAndRunServer(app, db);
const jobQueue = await JobQueue.createJobQueue(db);
const cleanup = async () => {
console.log("Shutting down gracefully");
await jobQueue.obliterate();
console.log("Finished cleanup");
process.exit(0);
};
process.on("SIGINT", cleanup);
process.on("SIGTERM", cleanup);
};
startApp().catch((error) => {
console.log(error);
});