Implemented username reserve feature

server/chat/reserve.js

@@ -0,0 +1,34 @@
+const crypto = require("crypto");
+
+const Sequelize = require('sequelize');
+const Op = Sequelize.Op;
+const { pseudonyms } = require('../database/models');
+
+const route = async (req, res) => {
+	//generate a UUID to act as a pseudonym (starting with a period)
+	const pseudonym = `.${uuid()}`;
+
+	//find or create the record (using the username)
+	const [instance, created] = await pseudonyms.findOrCreate({
+		where: {
+			username: req.fields.username
+		}
+	});
+
+	//save the pseudonym (overwriting existing pseudonyms)
+	const result = await pseudonyms.update({
+		pseudonym: pseudonym
+	},{
+		where: {
+			username: req.fields.username
+		}
+	});
+
+	//OK
+	return res.status(200).send({ pseudonym: pseudonym });
+};
+
+//lazy
+const uuid = (bytes = 16) => crypto.randomBytes(bytes).toString("hex");
+
+module.exports = route;