feat(controllers): improve response error handling in auth.controller

- Improve error handling in methods of the `auth.controller`
- Refactor conditional checks for errors to handle non-string types and missing payload data.
- Update response error messages to be more consistent and informative.

Issue: #19
Signed-off-by: Mathis <yidhra@tuta.io>

src/controllers/auth.controller.ts

@@ -64,7 +64,10 @@ async function registerUser(req: Request, res: Response): Promise<Response> {
 
 	const RegisterServiceResult = await UserService.register(sanitizeData);
 
-	if (typeof RegisterServiceResult !== 'string' && RegisterServiceResult.message === "GDPR acceptance is required.") {
+	if (
+		typeof RegisterServiceResult !== "string" &&
+		RegisterServiceResult.message === "GDPR acceptance is required."
+	) {
 		logger.warn(`GDPR not approved (${req.ip})`);
 		return res.status(HttpStatusCode.BadRequest).json({
 			error: RegisterServiceResult.error,
@@ -165,11 +168,17 @@ async function getAllUsers(req: Request, res: Response) {
 	}
 	const AllUserResponse = await UserService.getAll();
 	if (!AllUserResponse.users) {
-		return res.type("application/json").status(HttpStatusCode.InternalServerError).json({
+		return res
+			.type("application/json")
+			.status(HttpStatusCode.InternalServerError)
+			.json({
 				error: "Internal server error",
 			});
 	}
-	return res.type("application/json").status(HttpStatusCode.Found).json(AllUserResponse);
+	return res
+		.type("application/json")
+		.status(HttpStatusCode.Found)
+		.json(AllUserResponse);
 }
 
 async function getUser(req: Request, res: Response) {
@@ -177,14 +186,20 @@ async function getUser(req: Request, res: Response) {
 	const bearerToken = authHeader?.split(" ")[1];
 	if (!bearerToken) {
 		logger.warn(`Bearer token not provided (${req.ip})`);
-		return res.type("application/json").status(HttpStatusCode.Unauthorized).json({
+		return res
+			.type("application/json")
+			.status(HttpStatusCode.Unauthorized)
+			.json({
 				error: "Unauthorized",
 			});
 	}
 	const payload = await JwtService.verify(bearerToken);
 	if (!payload || !payload.sub) {
 		logger.warn(`Unauthorized access attempt (${req.ip})`);
-		return res.type("application/json").status(HttpStatusCode.Unauthorized).json({
+		return res
+			.type("application/json")
+			.status(HttpStatusCode.Unauthorized)
+			.json({
 				error: "Unauthorized",
 			});
 	}
@@ -195,7 +210,10 @@ async function getUser(req: Request, res: Response) {
 		});
 	}
 	if ("username" in sourceUser && !sourceUser.is_admin) {
-		return res.type("application/json").status(HttpStatusCode.Unauthorized).json({
+		return res
+			.type("application/json")
+			.status(HttpStatusCode.Unauthorized)
+			.json({
 				error: "Unauthorized",
 			});
 	}
@@ -308,7 +326,7 @@ async function deleteUser(req: Request, res: Response): Promise<Response> {
 	}
 	const payload = await JwtService.verify(bearerToken);
 
-	if (!payload) {
+	if (!payload || !payload.sub) {
 		logger.warn(`Invalid token (${req.ip})`);
 		return res.type("application/json").status(401).json({
 			error: "Invalid token",

src/services/user.service.ts

@@ -2,13 +2,13 @@ import type { IDbUser } from "@interfaces/database/IDbUser";
 import type { IReqLogin } from "@interfaces/requests/IReqLogin";
 import type { IReqRegister } from "@interfaces/requests/IReqRegister";
 import { ErrorType, type ISError } from "@interfaces/services/ISError";
+import type { IUserUpdate } from "@interfaces/services/IUserUpdate";
 import CredentialService from "@services/credential.service";
 import JwtService from "@services/jwt.service";
 import MySqlService from "@services/mysql.service";
 import { isDebugMode } from "@utils/debugState";
 import { Logger } from "tslog";
 import { v4 } from "uuid";
-import {IUserUpdate} from "@interfaces/services/IUserUpdate";
 
 const logger = new Logger({
 	name: "UserService",
@@ -99,7 +99,6 @@ DbHandler.factorize({
 	logger.trace(`\n\n> ${result._valuesArray.join(', ')}\n\n> ${result.totalFields}\n\n> ${result._keysTemplate}\n`)
 })*/
 
-//ToTest
 /**
  * Registers a new user.
  *
@@ -164,7 +163,7 @@ async function register(inputData: IReqRegister): Promise<ISError | string> {
 		);
 
 		// JWT
-		const token = await JwtService.sign(
+		return await JwtService.sign(
 			{
 				sub: currentId,
 			},
@@ -174,7 +173,6 @@ async function register(inputData: IReqRegister): Promise<ISError | string> {
 			"1d",
 			"user",
 		);
-		return token;
 	} catch (err) {
 		logger.error(`\n\n${err}\n`);
 		return {
@@ -184,7 +182,6 @@ async function register(inputData: IReqRegister): Promise<ISError | string> {
 	}
 }
 
-//ToTest
 /**
  * Logs in a user with the provided input data.
  *
@@ -331,9 +328,8 @@ async function editUserService(
 async function deleteUserService(targetId: string): Promise<boolean> {
 	logger.info(`Deleting user ${targetId}`);
 	try {
-		const DeleteResult = await MySqlService.User.delete(DbHandler, targetId)
-		if (DeleteResult.affectedRows !== 0) return true;
-		return false;
+		const DeleteResult = await MySqlService.User.delete(DbHandler, targetId);
+		return DeleteResult.affectedRows !== 0;
 	} catch (e) {
 		logger.warn(e);
 		return false;