Feat/error (#998)

* implemented the errors

* implemented the errors

* implemented the errors

* implemented the errors

* implemented the errors

---------

Co-authored-by: nanaf6203-bit <nanaf6203@gmail.com>

Author: ummarig

src/common/filters/all-exceptions.filter.ts

@@ -0,0 +1,36 @@
+import {
+  ExceptionFilter,
+  Catch,
+  ArgumentsHost,
+  HttpStatus,
+  Logger,
+} from '@nestjs/common';
+import { Request, Response } from 'express';
+
+@Catch()
+export class AllExceptionsFilter implements ExceptionFilter {
+  private readonly logger = new Logger(AllExceptionsFilter.name);
+
+  catch(exception: unknown, host: ArgumentsHost) {
+    const ctx = host.switchToHttp();
+    const response = ctx.getResponse<Response>();
+    const request = ctx.getRequest<Request>();
+    
+    const status = HttpStatus.INTERNAL_SERVER_ERROR;
+    const message = exception instanceof Error ? exception.message : 'Internal server error';
+
+    this.logger.error(
+      `Uncaught Exception: ${message} - ${request.url}`,
+      exception instanceof Error ? exception.stack : 'No stack trace available',
+    );
+
+    response.status(status).json({
+      success: false,
+      statusCode: status,
+      timestamp: new Date().toISOString(),
+      path: request.url,
+      message: process.env.NODE_ENV === 'production' ? 'Internal server error' : message,
+      stack: process.env.NODE_ENV === 'development' && exception instanceof Error ? exception.stack : undefined,
+    });
+  }
+}

src/common/filters/http-exception.filter.ts

@@ -0,0 +1,45 @@
+import {
+  ExceptionFilter,
+  Catch,
+  ArgumentsHost,
+  HttpException,
+  Logger,
+} from '@nestjs/common';
+import { Request, Response } from 'express';
+
+@Catch(HttpException)
+export class HttpExceptionFilter implements ExceptionFilter {
+  private readonly logger = new Logger(HttpExceptionFilter.name);
+
+  catch(exception: HttpException, host: ArgumentsHost) {
+    const ctx = host.switchToHttp();
+    const response = ctx.getResponse<Response>();
+    const request = ctx.getRequest<Request>();
+    const status = exception.getStatus();
+    
+    const exceptionResponse = exception.getResponse();
+    let message = 'An unexpected error occurred';
+    let errors = null;
+
+    if (typeof exceptionResponse === 'string') {
+      message = exceptionResponse;
+    } else if (typeof exceptionResponse === 'object') {
+      message = (exceptionResponse as any).message || message;
+      errors = (exceptionResponse as any).errors || null;
+    }
+
+    this.logger.error(
+      `HTTP Exception: ${status} - ${message} - ${request.url} - Stack: ${exception.stack}`,
+    );
+
+    response.status(status).json({
+      success: false,
+      statusCode: status,
+      timestamp: new Date().toISOString(),
+      path: request.url,
+      message,
+      errors,
+      stack: process.env.NODE_ENV === 'development' ? exception.stack : undefined,
+    });
+  }
+}

src/common/filters/prisma-exception.filter.ts

@@ -0,0 +1,71 @@
+import {
+  ExceptionFilter,
+  Catch,
+  ArgumentsHost,
+  HttpStatus,
+  Logger,
+} from '@nestjs/common';
+import { Request, Response } from 'express';
+import { Prisma } from '@prisma/client';
+
+@Catch(Prisma.PrismaClientKnownRequestError)
+export class PrismaExceptionFilter implements ExceptionFilter {
+  private readonly logger = new Logger(PrismaExceptionFilter.name);
+
+  catch(exception: Prisma.PrismaClientKnownRequestError, host: ArgumentsHost) {
+    const ctx = host.switchToHttp();
+    const response = ctx.getResponse<Response>();
+    const request = ctx.getRequest<Request>();
+    
+    let status = HttpStatus.INTERNAL_SERVER_ERROR;
+    let message = 'Database error occurred';
+    let errors = null;
+
+    // Handle common Prisma errors
+    switch (exception.code) {
+      case 'P2002': // Unique constraint violation
+        status = HttpStatus.CONFLICT;
+        const target = (exception.meta?.target as string[])?.join(', ') || 'field';
+        message = `Unique constraint failed on ${target}`;
+        errors = { [target]: 'must be unique' };
+        break;
+      case 'P2025': // Record not found
+        status = HttpStatus.NOT_FOUND;
+        message = 'Record not found';
+        break;
+      case 'P2003': // Foreign key constraint violation
+        status = HttpStatus.BAD_REQUEST;
+        message = 'Foreign key constraint failed - related record does not exist';
+        break;
+      case 'P2014': // Relation violation
+        status = HttpStatus.BAD_REQUEST;
+        message = 'Invalid relation - cannot change record due to existing dependencies';
+        break;
+      case 'P2000': // Value too long for column
+        status = HttpStatus.BAD_REQUEST;
+        message = 'Value too long for column';
+        break;
+      case 'P2011': // Null constraint violation
+        status = HttpStatus.BAD_REQUEST;
+        message = 'Null constraint violation - cannot set required field to null';
+        break;
+      default:
+        this.logger.error(`Unhandled Prisma error: ${exception.code}`, exception.stack);
+    }
+
+    this.logger.error(
+      `Prisma Exception: ${exception.code} - ${message} - ${request.url} - Stack: ${exception.stack}`,
+    );
+
+    response.status(status).json({
+      success: false,
+      statusCode: status,
+      timestamp: new Date().toISOString(),
+      path: request.url,
+      message,
+      errors,
+      prismaCode: process.env.NODE_ENV === 'development' ? exception.code : undefined,
+      stack: process.env.NODE_ENV === 'development' ? exception.stack : undefined,
+    });
+  }
+}

src/main.ts

@@ -13,6 +13,10 @@ import { RateLimitHeadersInterceptor } from './auth/interceptors/rate-limit-head
 import { ResponseFormatInterceptor } from './common/interceptors/response-format.interceptor';
 import { setupSwagger } from './config/swagger.config';
 import { validateEnvironment } from './utils/validate-env';
+// Import our exception filters
+import { AllExceptionsFilter } from './common/filters/all-exceptions.filter';
+import { HttpExceptionFilter } from './common/filters/http-exception.filter';
+import { PrismaExceptionFilter } from './common/filters/prisma-exception.filter';
 
 async function bootstrap() {
   validateEnvironment();