jesse-code.js

/* previous code */

app.post("/signup", (req, res) => {
	 var check = client.exists(req.body.username);

	 if(check == 0) {
		 res.send("sorry that name already exists");
	   //res.render("exists", {
		 //  name : req.body.username
	  // });
	 } else if(check == 1) {
		var username = req.body.username;
		var password = sha256(req.body.password);
		var first_name = req.body.first_name;
		var last_name = req.body.last_name;
		var email = req.body.email;

		client.hmset("Meet:User:" + username, [
			"username", username,
			"password", password,
			"first_name", first_name,
			"last_name", last_name,
			"email", email
		], (err, reply) => {
			if(err != undefined) {
				console.log("An error occured during registration: " + err);
			} else {
				console.log(reply);
				res.redirect("/registrationSuccess");
			}
		});
	 }
 });

/* with promises, koa instead of express, ioredis instead of redis */

 app.post("/signup", async (req, res) => {
	 /* await pauses the function while it's doing asyncronous stuff */
	 const check = await client.exists(`Meet:User:${username}`);

	 if(!check) {
		 res.body = "No user found!";
		 return;
	 }

	 /* destructuring - allows getting lots of things out of an object */

	 const {
		 username,
		 first_name,
		 last_name,
		 email
	 } = req.body;

	 const password = sha256(req.body.password);

	 await client.hmset(`Meet:User:${username}`, {
		 username,
		 password,
		 first_name,
		 last_name,
		 email
	 });
 });