feat: 🔥 support deleting a user

support deleting a user

apps/backend/envs/.env.development

@@ -1,5 +1,6 @@
 NODE_ENV="development"
 PORT="3000"
+DATABASE_URL="mongodb://localhost:27017/dashboard?retryWrites=true&w=majority"
 ACCESS_TOKEN_JWT_KEY="ACCESS"
 REFRESH_TOKEN_JWT_KEY="REFRESH"
 GOOGLE_OAUTH_CLIENT_ID="DUMMY"

apps/backend/package.json

@@ -11,9 +11,9 @@
 		"start": "dotenv -e ./envs/.env.production nest start",
 		"start:dev": "dotenv -e ./envs/.env.development nest start --watch",
 		"start:prod": "dotenv -e ./envs/.env.production node dist/main",
-		"prisma-gen:dev": "dotenv -e ./prisma/.env.development prisma generate --schema ./prisma/schema.prisma",
+		"prisma-gen:dev": "prisma generate --schema ./prisma/schema.prisma",
+		"prisma-gen:prod": "prisma generate --schema ./prisma/schema.prisma",
 		"prisma-push:dev": "dotenv -e ./prisma/.env.development prisma db push --schema ./prisma/schema.prisma",
-		"prisma-gen:prod": "dotenv -e ./prisma/.env.production prisma generate --schema ./prisma/schema.prisma",
 		"prisma-push:prod": "dotenv -e ./prisma/.env.production prisma db push --schema ./prisma/schema.prisma",
 		"lint": "eslint -c ./.eslintrc.cjs --ignore-path ./.eslintignore \"./**/*.ts\"",
 		"type-check": "tsc --project ./tsconfig.json",

apps/backend/src/modules/database/user.service.ts

@@ -53,4 +53,8 @@ export class DBUserService {
 			await this.prisma.refreshToken.delete({ where: { id: firstTokenId } });
 		}
 	}
+
+	public async deleteUser(userId: string) {
+		await this.prisma.user.delete({ where: { id: userId } });
+	}
 }

apps/backend/src/modules/user/modules/auth/auth.module.ts

@@ -22,6 +22,7 @@ import { GoogleController } from './google.controller';
 import { GithubAuthGuard } from './guards/github-auth.guard';
 import { GithubStrategy } from './strategies/github.strategy';
 import { GithubController } from './github.controller';
+import { DeleteController } from './delete.controller';
 
 @Module({
 	imports: [
@@ -45,6 +46,7 @@ import { GithubController } from './github.controller';
 		RefreshTokenController,
 		GoogleController,
 		GithubController,
+		DeleteController,
 	],
 	providers: [
 		...QueryHandlers,

apps/backend/src/modules/user/modules/auth/commands/contracts/delete-user.contract.ts

@@ -0,0 +1,3 @@
+export class DeleteUserContract {
+	constructor(public readonly userId: string) {}
+}

apps/backend/src/modules/user/modules/auth/commands/handlers/delete-user.handler.ts

@@ -0,0 +1,14 @@
+import { CommandHandler, ICommandHandler } from '@nestjs/cqrs';
+
+import { DBUserService } from '@/modules/database/user.service';
+
+import { DeleteUserContract } from '../contracts/delete-user.contract';
+
+@CommandHandler(DeleteUserContract)
+export class DeleteUserHandler implements ICommandHandler<DeleteUserContract> {
+	constructor(private readonly dbUserService: DBUserService) {}
+
+	async execute(contract: DeleteUserContract) {
+		await this.dbUserService.deleteUser(contract.userId);
+	}
+}

apps/backend/src/modules/user/modules/auth/commands/handlers/index.ts

@@ -1,4 +1,5 @@
 import { AddRefreshTokenHandler } from './add-refresh-token.handler';
+import { DeleteUserHandler } from './delete-user.handler';
 import { RemoveOldRefreshTokensHandler } from './remove-old-refresh-tokens.handler';
 
-export const CommandHandlers = [AddRefreshTokenHandler, RemoveOldRefreshTokensHandler];
+export const CommandHandlers = [AddRefreshTokenHandler, RemoveOldRefreshTokensHandler, DeleteUserHandler];

apps/backend/src/modules/user/modules/auth/delete.controller.ts

@@ -0,0 +1,22 @@
+import { Controller, Delete, HttpCode, HttpStatus, Logger } from '@nestjs/common';
+import { CommandBus } from '@nestjs/cqrs';
+
+import { CurrentUserId } from '@/decorators/current-user-id.decorator';
+import { DeleteUserContract } from './commands/contracts/delete-user.contract';
+
+@Controller('auth')
+export class DeleteController {
+	private readonly logger = new Logger(DeleteController.name);
+
+	constructor(private readonly commandBus: CommandBus) {}
+
+	@Delete('delete')
+	@HttpCode(HttpStatus.OK)
+	public async register(@CurrentUserId() userId: string): Promise<void> {
+		this.logger.log(`Will try to delete a user with an Id: "${userId}"`);
+
+		await this.commandBus.execute<DeleteUserContract, void>(new DeleteUserContract(userId));
+
+		this.logger.log('Successfully deleted a user');
+	}
+}