feat: Emails are stored in lowercase

src/app/app.module.ts

@@ -9,12 +9,14 @@ import { AuthGuard } from '../auth/guard/auth/auth.guard';
 import { PrismaModule } from '../prisma/prisma.module';
 import { MailModule } from '../mail/mail.module';
 import { ProviderModule } from '../provider/provider.module';
+import { CommonModule } from '../common/common.module';
 
 @Module({
   imports: [
     ConfigModule.forRoot({
       isGlobal: true,
     }),
+    CommonModule,
     AuthModule,
     UserModule,
     OauthModule,

src/auth/controller/auth.controller.ts

@@ -32,6 +32,7 @@ import {
   ApiTags,
 } from '@nestjs/swagger';
 import { userProperties } from '../../schemas/user.properties';
+import { LowercasePipe } from '../../common/pipes/lowercase.pipe';
 
 @Controller('auth')
 @ApiTags('Auth Controller')
@@ -195,7 +196,9 @@ export class AuthController {
     description: 'User not found',
   })
   @HttpCode(HttpStatus.NO_CONTENT)
-  async resendEmailVerificationCode(@Param('email') email: string) {
+  async resendEmailVerificationCode(
+    @Param('email', LowercasePipe) email: string,
+  ) {
     return await this.authService.resendEmailVerificationCode(email);
   }
 

src/auth/dto/email-verification.dto.ts

@@ -1,4 +1,5 @@
 import { ApiProperty } from '@nestjs/swagger';
+import { Transform } from 'class-transformer';
 import { IsEmail, Matches } from 'class-validator';
 
 export class EmailVerificationDto {
@@ -10,6 +11,7 @@ export class EmailVerificationDto {
     type: String,
     example: '[email protected]',
   })
+  @Transform(({ value }) => value.toLowerCase())
   email: string;
   @Matches(/^[0-9]{6}$/, {
     message: 'Code must be a 6 digit number',

src/auth/dto/signin.dto.ts

@@ -1,8 +1,10 @@
 import { ApiProperty } from '@nestjs/swagger';
+import { Transform } from 'class-transformer';
 import { IsEmail } from 'class-validator';
 
 export class SigninDto {
   @IsEmail()
+  @Transform(({ value }) => value.toLowerCase())
   @ApiProperty({
     name: 'email',
     description: 'User email. Must be a valid email address.',

src/auth/dto/signup.dto.ts

@@ -1,8 +1,10 @@
 import { ApiProperty } from '@nestjs/swagger';
+import { Transform } from 'class-transformer';
 import { IsEmail } from 'class-validator';
 
 export class SignupDto {
   @IsEmail()
+  @Transform(({ value }) => value.toLowerCase())
   @ApiProperty({
     name: 'email',
     description: 'User email. Must be a valid email address.',

src/auth/service/auth.service.ts

@@ -201,6 +201,7 @@ export class AuthService {
     profilePictureUrl?: string,
     throwErrorIfUserExists?: boolean,
   ) {
+    email = email.toLowerCase();
     let user = await this.findUserByEmail(email);
     if (user && throwErrorIfUserExists) {
       throw new ConflictException('User already exists');
@@ -209,7 +210,7 @@ export class AuthService {
     if (!user) {
       user = await this.prisma.user.create({
         data: {
-          email: email,
+          email,
           name: name,
           profilePictureUrl: profilePictureUrl,
           authType,
@@ -241,6 +242,7 @@ export class AuthService {
   }
 
   private async findUserByEmail(email: string) {
+    email = email.toLowerCase();
     return await this.prisma.user.findUnique({
       where: {
         email,

src/common/common.module.ts

@@ -0,0 +1,5 @@
+import { Global, Module } from '@nestjs/common';
+
+@Global()
+@Module({})
+export class CommonModule {}

src/common/pipes/lowercase.pipe.ts

@@ -0,0 +1,8 @@
+import { PipeTransform, Injectable } from '@nestjs/common';
+
+@Injectable()
+export class LowercasePipe implements PipeTransform {
+  transform(value: string) {
+    return value.toLowerCase();
+  }
+}

src/user/service/user.service.ts

@@ -177,7 +177,7 @@ export class UserService {
    */
   async linkSocialAccount(req: any, socialAccountType: SocialAccountType) {
     const { emails, profileUrl } = req.user;
-    const email = emails[0].value;
+    const email = emails[0].value.toLowerCase();
 
     // Check if the user exists
     const currentUser = await this.prisma.user.findUniqueOrThrow({