From b7812271726c450ad2abfdd7376d56ee42f18db5 Mon Sep 17 00:00:00 2001
From: faris Aljohari <83524184+farisaljohari@users.noreply.github.com>
Date: Tue, 2 Jul 2024 19:34:41 +0300
Subject: [PATCH 1/2] Add logging interceptor

---
 src/app.module.ts                       |  8 ++++
 src/interceptors/logging.interceptor.ts | 63 +++++++++++++++++++++++++
 2 files changed, 71 insertions(+)
 create mode 100644 src/interceptors/logging.interceptor.ts

diff --git a/src/app.module.ts b/src/app.module.ts
index c95d1bf..0b5fd4a 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -18,6 +18,8 @@ import { UserNotificationModule } from './user-notification/user-notification.mo
 import { DeviceMessagesSubscriptionModule } from './device-messages/device-messages.module';
 import { SceneModule } from './scene/scene.module';
 import { DoorLockModule } from './door-lock/door.lock.module';
+import { APP_INTERCEPTOR } from '@nestjs/core';
+import { LoggingInterceptor } from './interceptors/logging.interceptor';
 @Module({
   imports: [
     ConfigModule.forRoot({
@@ -42,5 +44,11 @@ import { DoorLockModule } from './door-lock/door.lock.module';
     DoorLockModule,
   ],
   controllers: [AuthenticationController],
+  providers: [
+    {
+      provide: APP_INTERCEPTOR,
+      useClass: LoggingInterceptor,
+    },
+  ],
 })
 export class AuthModule {}
diff --git a/src/interceptors/logging.interceptor.ts b/src/interceptors/logging.interceptor.ts
new file mode 100644
index 0000000..e74f4c2
--- /dev/null
+++ b/src/interceptors/logging.interceptor.ts
@@ -0,0 +1,63 @@
+import {
+  Injectable,
+  NestInterceptor,
+  ExecutionContext,
+  CallHandler,
+} from '@nestjs/common';
+import { Observable, throwError } from 'rxjs';
+import { map, catchError } from 'rxjs/operators';
+
+@Injectable()
+export class LoggingInterceptor implements NestInterceptor {
+  intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
+    const request = context.switchToHttp().getRequest();
+    const { method, url, body } = request;
+
+    return next.handle().pipe(
+      map((response) => {
+        // Filter out sensitive fields from the request body
+        const filteredRequestBody = this.filterSensitiveFields(body);
+        console.log(
+          '-------------------------------------------------------------------',
+        );
+        console.log(`Request Method: ${method}`);
+        console.log(`Request URL: ${url}`);
+        if (
+          filteredRequestBody &&
+          Object.keys(filteredRequestBody).length > 0
+        ) {
+          console.log(`Request Body: ${JSON.stringify(filteredRequestBody)}`);
+        }
+        // Filter out sensitive fields from the response
+        const filteredResponse = this.filterSensitiveFields(response);
+        console.log(`Response: ${JSON.stringify(filteredResponse)}`);
+        return filteredResponse;
+      }),
+      catchError((error) => {
+        // Do not log anything if there is an error
+        return throwError(error);
+      }),
+    );
+  }
+
+  private filterSensitiveFields(data: any): any {
+    const blacklist = ['password', 'refreshToken', 'accessToken', 'otp'];
+
+    if (data && typeof data === 'object' && !Array.isArray(data)) {
+      return Object.keys(data).reduce((acc, key) => {
+        if (blacklist.includes(key)) {
+          acc[key] = '[FILTERED]';
+        } else if (typeof data[key] === 'object' && data[key] !== null) {
+          acc[key] = this.filterSensitiveFields(data[key]);
+        } else {
+          acc[key] = data[key];
+        }
+        return acc;
+      }, {});
+    } else if (Array.isArray(data)) {
+      return data.map((item) => this.filterSensitiveFields(item));
+    }
+
+    return data;
+  }
+}

From 2ff03120875887c0bee51d51e264810d3a3bfe34 Mon Sep 17 00:00:00 2001
From: faris Aljohari <83524184+farisaljohari@users.noreply.github.com>
Date: Tue, 2 Jul 2024 19:39:31 +0300
Subject: [PATCH 2/2] Filter out sensitive fields from request and response
 bodies for logging

---
 src/interceptors/logging.interceptor.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/interceptors/logging.interceptor.ts b/src/interceptors/logging.interceptor.ts
index e74f4c2..9e06186 100644
--- a/src/interceptors/logging.interceptor.ts
+++ b/src/interceptors/logging.interceptor.ts
@@ -15,7 +15,7 @@ export class LoggingInterceptor implements NestInterceptor {
 
     return next.handle().pipe(
       map((response) => {
-        // Filter out sensitive fields from the request body
+        // Filter out sensitive fields from the request body for logging
         const filteredRequestBody = this.filterSensitiveFields(body);
         console.log(
           '-------------------------------------------------------------------',
@@ -28,10 +28,10 @@ export class LoggingInterceptor implements NestInterceptor {
         ) {
           console.log(`Request Body: ${JSON.stringify(filteredRequestBody)}`);
         }
-        // Filter out sensitive fields from the response
+        // Filter out sensitive fields from the response for logging
         const filteredResponse = this.filterSensitiveFields(response);
         console.log(`Response: ${JSON.stringify(filteredResponse)}`);
-        return filteredResponse;
+        return response; // Return the actual response unmodified
       }),
       catchError((error) => {
         // Do not log anything if there is an error