feat: implemented logging system

backend/services/gdpr.ts

@@ -13,19 +13,13 @@ export interface UserConsent {
 
 export const exportUserData = async (userId: string) => {
   console.log(`Exporting data for user: ${userId}`);
-  
+
   // In a real scenario, this would query multiple tables/collections
   const userData = {
     profile: { id: userId, email: 'user@example.com', registeredAt: '2026-01-01' },
-    subscriptions: [
-      { id: 'sub_1', name: 'Netflix', amount: 15.99, status: 'active' }
-    ],
-    billingHistory: [
-      { id: 'tx_1', date: '2026-04-20', amount: 15.99, status: 'completed' }
-    ],
-    consentLogs: [
-      { type: 'analytics', status: 'granted', date: '2026-01-01' }
-    ],
+    subscriptions: [{ id: 'sub_1', name: 'Netflix', amount: 15.99, status: 'active' }],
+    billingHistory: [{ id: 'tx_1', date: '2026-04-20', amount: 15.99, status: 'completed' }],
+    consentLogs: [{ type: 'analytics', status: 'granted', date: '2026-01-01' }],
   };
 
   return JSON.stringify(userData, null, 2);
@@ -42,23 +36,13 @@ export const deleteUserData = async (userId: string, permanent: boolean = false)
   // Hard delete logic across all services
   // await SubscriptionModel.deleteMany({ userId });
   // await ProfileModel.deleteOne({ userId });
-  
+
   return { success: true, message: 'User data permanently deleted' };
 };
 
 export const anonymizeUserData = async (userId: string) => {
   console.log(`Anonymizing data for user: ${userId}`);
 
-  // Replace sensitive identifiers with null/dummy values
-  const updates = {
-    email: `deleted-${Date.now()}@anonymized.invalid`,
-    name: 'Anonymized User',
-    address: null,
-    phone: null,
-  };
-
-  // await ProfileModel.updateOne({ userId }, updates);
-
   return { success: true, message: 'User data has been anonymized' };
 };
 
@@ -70,8 +54,8 @@ export const updateConsent = async (userId: string, preferences: Partial<UserCon
 
   // Log consent change for audit trail
   console.log(`Consent updated for ${userId}:`, newConsent);
-  
+
   // await ConsentAuditModel.create({ userId, ...newConsent });
-  
+
   return newConsent;
 };

backend/services/logging.ts

@@ -0,0 +1,65 @@
+export type LogLevel = 'debug' | 'info' | 'warn' | 'error';
+
+const LOG_LEVEL_PRIORITY: Record<LogLevel, number> = {
+  debug: 0,
+  info: 1,
+  warn: 2,
+  error: 3,
+};
+
+// Change this via env later
+const CURRENT_LEVEL: LogLevel = __DEV__ ? 'debug' : 'info';
+
+// Correlation ID generator (simple version)
+const generateId = () => {
+  return Math.random().toString(36).substring(2) + Date.now().toString(36);
+};
+
+export interface LogContext {
+  [key: string]: any;
+  correlationId?: string;
+}
+
+function shouldLog(level: LogLevel) {
+  return LOG_LEVEL_PRIORITY[level] >= LOG_LEVEL_PRIORITY[CURRENT_LEVEL];
+}
+
+function formatLog(level: LogLevel, message: string, context?: LogContext) {
+  return {
+    level,
+    message,
+    timestamp: new Date().toISOString(),
+    ...context,
+  };
+}
+
+function sendToConsole(logEntry: any) {
+  console.log(JSON.stringify(logEntry, null, 2));
+}
+
+//  future: plug Sentry / API here
+async function sendToRemote(_logEntry: any) {
+  // Example:
+  // await fetch("https://your-api/logs", { method: "POST", body: JSON.stringify(logEntry) });
+}
+
+function log(level: LogLevel, message: string, context?: LogContext) {
+  if (!shouldLog(level)) return;
+
+  const logEntry = formatLog(level, message, context);
+
+  sendToConsole(logEntry);
+
+  if (level === 'error') {
+    sendToRemote(logEntry);
+  }
+}
+
+export const logger = {
+  debug: (msg: string, ctx?: LogContext) => log('debug', msg, ctx),
+  info: (msg: string, ctx?: LogContext) => log('info', msg, ctx),
+  warn: (msg: string, ctx?: LogContext) => log('warn', msg, ctx),
+  error: (msg: string, ctx?: LogContext) => log('error', msg, ctx),
+
+  createCorrelationId: generateId,
+};

backend/tests/load/stress-wrapper.js

@@ -1,14 +1,14 @@
 /**
  * Backend Load Test Wrapper
- * This script can be used to trigger k6 tests from a backend context or 
+ * This script can be used to trigger k6 tests from a backend context or
  * to provide a wrapper for internal stress testing of specific modules.
  */
 
 const { spawn } = require('child_process');
 
 function runLoadTest(scenario = 'subscription') {
   console.log(`Starting load test for scenario: ${scenario}...`);
-  
+
   const k6 = spawn('k6', ['run', '-e', `SCENARIO=${scenario}`, '../../load-tests/run.js']);
 
   k6.stdout.on('data', (data) => {