Upgrade to proper user management

src/models/calendar/users/users.service.ts

@@ -0,0 +1,182 @@
+import * as dotenv from 'dotenv';
+import * as bcrypt from 'bcrypt';
+import {Guid} from 'guid-typescript';
+import {User} from './user.interface';
+import {Session} from './session.interface';
+import {NachklangCalendarDB} from '../Calendar.db';
+
+dotenv.config();
+
+/**
+ * Data Model Interfaces
+ */
+
+
+/**
+ * Service Methods
+ */
+
+/**
+ * Creates a user record in the database, also creates a session. Returns the session if successful.
+ */
+export const createUser = async (email: string, password: string, fullName: string, ip: string): Promise<Session> => {
+	let conn = await NachklangCalendarDB.getConnection();
+	try {
+		// Hash password and generate + hash session key
+		const pwHash = bcrypt.hashSync(password, 10);
+		const sessionKey = Guid.create().toString();
+		const sessionKeyHash = bcrypt.hashSync(sessionKey, 10);
+
+		// Create user entry in SQL
+		const userQuery = 'INSERT INTO users (email, password_hash, full_name) VALUES (?, ?, ?) RETURNING user_id';
+		const userIdRes = await conn.query(userQuery, [email, pwHash, fullName]);
+
+		// Get user id of the created user
+		let userId: number = -1;
+		for (const row of userIdRes) {
+			userId = row.user_id;
+		}
+
+		// Create session
+		const sessionQuery = 'INSERT INTO sessions (user_id, session_key_hash, created_date, valid_until, last_ip) VALUES (?,?,NOW(),DATE_ADD(NOW(), INTERVAL 30 DAY),?) RETURNING session_id';
+		const sessionIdRes = await conn.query(sessionQuery, [userId, sessionKeyHash, ip]);
+		await conn.commit();
+
+		// Get session id of the created session
+		let sessionId: number = -1;
+		for (const row of sessionIdRes) {
+			sessionId = row.session_id;
+		}
+
+		return {
+			session_id: sessionId,
+			user_id: userId,
+			session_key: sessionKey,
+			session_key_hash: 'HIDDEN',
+			last_ip: ip
+		};
+	} catch (err) {
+		throw err;
+	} finally {
+		// Return connection
+		await conn.end();
+	}
+};
+
+/**
+ * Checks if the given credentials are valid and creates a new session if they are.
+ * Returns the session information in case of a successful login
+ */
+export const login = async (email: string, password: string, ip: string): Promise<Session> => {
+	let conn = await NachklangCalendarDB.getConnection();
+	try {
+		// Get saved password hash
+		const query = 'SELECT user_id, password_hash FROM users WHERE email = ?';
+		const userRows = await conn.query(query, email);
+		let savedHash = '';
+		let userId = -1;
+		for (const row of userRows) {
+			savedHash = row.password_hash;
+			userId = row.user_id;
+		}
+
+		// Check for correct password
+		if (!bcrypt.compareSync(password, savedHash)) {
+			// Wrong password, return invalid
+			return {} as Session;
+		}
+
+		// Generate + hash session key
+		const sessionKey = Guid.create().toString();
+		const sessionKeyHash = bcrypt.hashSync(sessionKey, 10);
+
+		// Create session
+		const sessionQuery = 'INSERT INTO sessions (user_id, session_key_hash, created_date, valid_until, last_ip) VALUES (?,?,NOW(),DATE_ADD(NOW(), INTERVAL 30 DAY),?) RETURNING session_id';
+		const sessionIdRes = await conn.query(sessionQuery, [userId, sessionKeyHash, ip]);
+		await conn.commit();
+
+		// Get session id of the created session
+		let sessionId: number = -1;
+		for (const row of sessionIdRes) {
+			sessionId = row.session_id;
+		}
+
+		return {
+			session_id: sessionId,
+			user_id: userId,
+			session_key: sessionKey,
+			session_key_hash: 'HIDDEN',
+			last_ip: ip
+		};
+	} catch (err) {
+		throw err;
+	} finally {
+		// Return connection
+		await conn.end();
+	}
+};
+
+/**
+ * Checks if the given session information are valid and returns the user information if they are
+ */
+export const checkSession = async (sessionId: string, sessionKey: string, ip: string): Promise<User> => {
+	let conn = await NachklangCalendarDB.getConnection();
+	try {
+		// Get saved session key hash
+		const query = 'SELECT user_id, session_key_hash, valid_until FROM sessions WHERE session_id = ?';
+		const sessionRows = await conn.query(query, sessionId);
+		let savedHash = '';
+		let userId = -1;
+		let validUntil = new Date();
+		for (const row of sessionRows) {
+			savedHash = row.session_key_hash;
+			userId = row.user_id;
+			validUntil = row.valid_until;
+		}
+
+		// Check for correct key
+		if (!bcrypt.compareSync(sessionKey, savedHash)) {
+			// Wrong key, return invalid
+			return {} as User;
+		}
+
+		// Check if the session is still valid
+		if (validUntil <= new Date()) {
+			// Session expired, return invalid
+			return {} as User;
+		}
+
+		// Update session entry in SQL
+		const updateSessionsQuery = 'UPDATE sessions SET last_IP = ? WHERE session_id = ?';
+		const userIdRes = await conn.query(updateSessionsQuery, [ip, sessionId]);
+		await conn.commit();
+
+		// Get the other required user information
+		const userQuery = 'SELECT user_id, email, full_name, is_active FROM users WHERE user_id = ?';
+		const userRows = await conn.query(userQuery, userId);
+		let username = '';
+		let email = '';
+		let fullName = '';
+		let is_active = false;
+		for (const row of userRows) {
+			username = row.username;
+			email = row.email;
+			fullName = row.full_name;
+			is_active = row.is_active;
+		}
+
+		// Everything is fine, return user information
+		return {
+			user_id: userId,
+			email: email,
+			password_hash: 'HIDDEN',
+			full_name: fullName,
+			is_active: is_active
+		};
+	} catch (err) {
+		throw err;
+	} finally {
+		// Return connection
+		await conn.end();
+	}
+};