Audit logging feature files

backend/routes/auth.js

@@ -3,7 +3,7 @@ const express = require('express');
 const bcrypt = require('bcryptjs');
 const crypto = require('crypto');
 
-function createAuthRouter(db) {
+function createAuthRouter(db, logAudit) {
     const router = express.Router();
 
     // Login
@@ -28,16 +28,43 @@ function createAuthRouter(db) {
             });
 
             if (!user) {
+                logAudit(db, {
+                    userId: null,
+                    username: username,
+                    action: 'login_failed',
+                    entityType: 'auth',
+                    entityId: null,
+                    details: { reason: 'user_not_found' },
+                    ipAddress: req.ip
+                });
                 return res.status(401).json({ error: 'Invalid username or password' });
             }
 
             if (!user.is_active) {
+                logAudit(db, {
+                    userId: user.id,
+                    username: username,
+                    action: 'login_failed',
+                    entityType: 'auth',
+                    entityId: null,
+                    details: { reason: 'account_disabled' },
+                    ipAddress: req.ip
+                });
                 return res.status(401).json({ error: 'Account is disabled' });
             }
 
             // Verify password
             const validPassword = await bcrypt.compare(password, user.password_hash);
             if (!validPassword) {
+                logAudit(db, {
+                    userId: user.id,
+                    username: username,
+                    action: 'login_failed',
+                    entityType: 'auth',
+                    entityId: null,
+                    details: { reason: 'invalid_password' },
+                    ipAddress: req.ip
+                });
                 return res.status(401).json({ error: 'Invalid username or password' });
             }
 
@@ -77,6 +104,16 @@ function createAuthRouter(db) {
                 maxAge: 24 * 60 * 60 * 1000 // 24 hours
             });
 
+            logAudit(db, {
+                userId: user.id,
+                username: user.username,
+                action: 'login',
+                entityType: 'auth',
+                entityId: null,
+                details: { role: user.role },
+                ipAddress: req.ip
+            });
+
             res.json({
                 message: 'Login successful',
                 user: {
@@ -97,6 +134,17 @@ function createAuthRouter(db) {
         const sessionId = req.cookies?.session_id;
 
         if (sessionId) {
+            // Look up user before deleting session
+            const session = await new Promise((resolve) => {
+                db.get(
+                    `SELECT u.id as user_id, u.username FROM sessions s
+                     JOIN users u ON s.user_id = u.id
+                     WHERE s.session_id = ?`,
+                    [sessionId],
+                    (err, row) => resolve(row || null)
+                );
+            });
+
             // Delete session from database
             await new Promise((resolve) => {
                 db.run(
@@ -105,6 +153,18 @@ function createAuthRouter(db) {
                     () => resolve()
                 );
             });
+
+            if (session) {
+                logAudit(db, {
+                    userId: session.user_id,
+                    username: session.username,
+                    action: 'logout',
+                    entityType: 'auth',
+                    entityId: null,
+                    details: null,
+                    ipAddress: req.ip
+                });
+            }
         }
 
         // Clear cookie