From f4f6f490ab0bb1a2a06d660ce1b276a4fad9d2c2 Mon Sep 17 00:00:00 2001
From: Daniel Andreas Wang <danielaw@relvokcor.xyz>
Date: Sat, 14 Mar 2026 15:37:31 +0100
Subject: first commit

---
 backend/src/app.js                         | 10 +++++++++
 backend/src/config/constants.js            |  1 +
 backend/src/config/database.js             | 17 +++++++++++++++
 backend/src/controllers/user.controller.js | 33 ++++++++++++++++++++++++++++++
 backend/src/index.js                       | 27 ++++++++++++++++++++++++
 backend/src/models/user.model.js           | 32 +++++++++++++++++++++++++++++
 backend/src/routes/user.route.js           |  7 +++++++
 7 files changed, 127 insertions(+)
 create mode 100644 backend/src/app.js
 create mode 100644 backend/src/config/constants.js
 create mode 100644 backend/src/config/database.js
 create mode 100644 backend/src/controllers/user.controller.js
 create mode 100644 backend/src/index.js
 create mode 100644 backend/src/models/user.model.js
 create mode 100644 backend/src/routes/user.route.js

(limited to 'backend/src')

diff --git a/backend/src/app.js b/backend/src/app.js
new file mode 100644
index 0000000..ef74178
--- /dev/null
+++ b/backend/src/app.js
@@ -0,0 +1,10 @@
+import express from 'express'
+
+const app = express()
+app.use(express.json())
+
+import userRouter from './routes/user.route.js'
+
+app.use('/api/v1/users', userRouter)
+
+export default app
\ No newline at end of file
diff --git a/backend/src/config/constants.js b/backend/src/config/constants.js
new file mode 100644
index 0000000..d7f4ed1
--- /dev/null
+++ b/backend/src/config/constants.js
@@ -0,0 +1 @@
+export const DB_NAME = 'intro-to-backend';
\ No newline at end of file
diff --git a/backend/src/config/database.js b/backend/src/config/database.js
new file mode 100644
index 0000000..98ce0cc
--- /dev/null
+++ b/backend/src/config/database.js
@@ -0,0 +1,17 @@
+import mongoose from "mongoose";
+import { DB_NAME } from './constants.js'
+
+const connectDB = async () => {
+  try {
+    const connectionInstance = await mongoose.connect(
+      `${process.env.MONGODB_URI}/${DB_NAME}`,
+    );
+    console.log(`\nMongoDB connected successfully
+            ${connectionInstance.connection.host}`)
+  } catch (error) {
+    console.log("MongoDB connection failed", error)
+    process.exit(1)
+  }
+}
+
+export default connectDB
diff --git a/backend/src/controllers/user.controller.js b/backend/src/controllers/user.controller.js
new file mode 100644
index 0000000..b5d2048
--- /dev/null
+++ b/backend/src/controllers/user.controller.js
@@ -0,0 +1,33 @@
+import { User } from '../models/user.model.js'
+
+const registerUser = async (req, res) => {
+  try {
+    const { username, email, password } = req.body
+
+    if (!username || !email || !password) {
+      return res.status(400).json({ message: 'All fields are important!'})
+    }
+
+    const existing = await User.findOne({ email: email.toLowerCase() })
+    if (existing) {
+      return res.status(400).json({ message: 'User already exists.'})
+    }
+
+    const user = await User.create({
+      username,
+      email: email.toLowerCase(),
+      password,
+    })
+
+    res.status(201).json({ 
+      message: 'User registered.',
+      user: { id: user._id, email: user.email, username: user.username }
+    })
+  } catch (error) {
+    res.status(500).json({ message: 'Internal server error!', error: error.message })
+  }
+}
+
+export {
+  registerUser
+}
diff --git a/backend/src/index.js b/backend/src/index.js
new file mode 100644
index 0000000..3dfe7a4
--- /dev/null
+++ b/backend/src/index.js
@@ -0,0 +1,27 @@
+import dotenv from "dotenv";
+import connectDB from "./config/database.js";
+import app from "./app.js";
+
+dotenv.config({
+  path: "./.env",
+});
+
+const PORT = process.env.PORT || 8000;
+
+const startServer = async () => {
+  try {
+    await connectDB();
+    app.on('error', (error) => {
+        console.log('ERROR', error)
+        throw error
+    })
+
+    app.listen(PORT, () => {
+        console.log(`Server is running on port: ${PORT}`)
+    })
+  } catch (error) {
+    console.log('Connection failed', error)
+  }
+}
+
+startServer()
\ No newline at end of file
diff --git a/backend/src/models/user.model.js b/backend/src/models/user.model.js
new file mode 100644
index 0000000..6cb9476
--- /dev/null
+++ b/backend/src/models/user.model.js
@@ -0,0 +1,32 @@
+import mongoose, { Schema } from 'mongoose'
+
+const userSchema = new Schema(
+  {
+    username: {
+      type: String,
+      required: true,
+      unique: true,
+      lowercase: true,
+      trim: true,
+      minLength: 1,
+      maxLength: 30
+    },
+
+    password: {
+      type: String,
+      required: true,
+      minLength: 8,
+      maxLength: 50
+    },
+
+    email: {
+      type: String,
+      required: true,
+      unique: true,
+      lowercase: true,
+      trim: true,
+    }
+  }
+)
+
+export const User = mongoose.model("User", userSchema)
\ No newline at end of file
diff --git a/backend/src/routes/user.route.js b/backend/src/routes/user.route.js
new file mode 100644
index 0000000..0765632
--- /dev/null
+++ b/backend/src/routes/user.route.js
@@ -0,0 +1,7 @@
+import { Router } from 'express'
+import { registerUser } from '../controllers/user.controller.js'
+
+const router = Router()
+router.route('/register').post(registerUser)
+
+export default router
-- 
cgit