dataset.xml

<dataset>
  <example>
    <user_input>How do we handle password reset flows?</user_input>
    <snippets>
      <snippet><![CDATA[```python auth/password_reset.py
def initiate_password_reset(email):
    token = generate_reset_token()
    send_reset_email(email, token)
    store_reset_token(email, token, expiry=24*hours)
    return True

def validate_reset_token(token, new_password):
    if is_token_valid(token):
        user = get_user_by_token(token)
        update_password(user, new_password)
        invalidate_token(token)
        return True
    return False
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>Where is the user registration logic implemented?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript src/services/UserService.ts
export class UserService {
  async register(userData: RegisterDTO): Promise<User> {
    const existingUser = await this.userRepo.findByEmail(userData.email);
    if (existingUser) {
      throw new DuplicateUserError();
    }
    
    const hashedPassword = await bcrypt.hash(userData.password);
    return this.userRepo.create({
      ...userData,
      password: hashedPassword
    });
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>How do we process payments?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript services/PaymentProcessor.ts
class PaymentProcessor {
  async processPayment(amount: number, paymentMethod: PaymentMethod): Promise<PaymentResult> {
    const transaction = await this.stripeClient.createCharge({
      amount,
      currency: 'usd',
      payment_method: paymentMethod.id,
      confirm: true
    });
    
    return this.saveTransaction(transaction);
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>Where is the email sending functionality?</user_input>
    <snippets>
      <snippet><![CDATA[```python utils/mailer.py
from sendgrid import SendGridAPIClient

class EmailService:
    def __init__(self, api_key):
        self.client = SendGridAPIClient(api_key)
    
    def send_email(self, to_email, subject, content):
        message = {
            'to': to_email,
            'subject': subject,
            'content': content,
            'from_email': 'noreply@ourapp.com'
        }
        return self.client.send(message)
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>How do we handle file uploads?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript src/controllers/FileUploadController.ts
@Controller('uploads')
export class FileUploadController {
  @Post()
  async uploadFile(@UploadedFile() file: Express.Multer.File) {
    const result = await this.s3Service.upload(file.buffer, {
      bucket: 'user-uploads',
      contentType: file.mimetype
    });
    
    return { url: result.Location };
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>Where is the database connection configuration?</user_input>
    <snippets>
      <snippet><![CDATA[```javascript config/database.js
module.exports = {
  development: {
    client: 'postgresql',
    connection: {
      host: process.env.DB_HOST,
      database: process.env.DB_NAME,
      user: process.env.DB_USER,
      password: process.env.DB_PASSWORD
    },
    pool: {
      min: 2,
      max: 10
    }
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>How do we implement rate limiting?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript middleware/RateLimiter.ts
export class RateLimiter {
  constructor(private redis: Redis) {}

  async limit(req: Request, res: Response, next: NextFunction) {
    const key = `rate_limit:${req.ip}`;
    const requests = await this.redis.incr(key);
    
    if (requests === 1) {
      await this.redis.expire(key, 60);
    }
    
    if (requests > 100) {
      return res.status(429).json({ error: 'Too many requests' });
    }
    
    next();
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>Where is the search functionality implemented?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript services/SearchService.ts
export class SearchService {
  async search(query: string, filters: SearchFilters): Promise<SearchResult[]> {
    const elasticQuery = this.buildElasticQuery(query, filters);
    
    const results = await this.elasticClient.search({
      index: 'products',
      body: elasticQuery
    });
    
    return this.mapResults(results.hits);
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>How do we handle logging?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript utils/Logger.ts
import winston from 'winston';

export const logger = winston.createLogger({
  level: process.env.LOG_LEVEL || 'info',
  format: winston.format.json(),
  transports: [
    new winston.transports.File({ filename: 'error.log', level: 'error' }),
    new winston.transports.File({ filename: 'combined.log' })
  ]
});
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>Where is the caching logic?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript services/CacheService.ts
export class CacheService {
  constructor(private redis: Redis) {}
  
  async get<T>(key: string): Promise<T | null> {
    const cached = await this.redis.get(key);
    return cached ? JSON.parse(cached) : null;
  }
  
  async set(key: string, value: any, ttl?: number): Promise<void> {
    await this.redis.set(key, JSON.stringify(value), 'EX', ttl || 3600);
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>How do we handle websocket connections?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript services/WebSocketService.ts
@WebSocketGateway()
export class WebSocketGateway {
  @WebSocketServer()
  server: Server;

  handleConnection(client: Socket) {
    const userId = this.getUserFromToken(client.handshake.auth.token);
    client.join(`user:${userId}`);
  }

  @SubscribeMessage('message')
  handleMessage(client: Socket, payload: any) {
    this.server.to(payload.room).emit('message', payload);
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>Where is the input validation handled?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript middleware/Validator.ts
export class ValidationMiddleware {
  validate(schema: Joi.Schema) {
    return (req: Request, res: Response, next: NextFunction) => {
      const { error } = schema.validate(req.body);
      
      if (error) {
        return res.status(400).json({
          error: error.details[0].message
        });
      }
      
      next();
    };
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>How do we implement the shopping cart?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript services/CartService.ts
export class CartService {
  async addToCart(userId: string, productId: string, quantity: number) {
    const cart = await this.cartRepo.findByUser(userId);
    const product = await this.productRepo.findById(productId);
    
    if (product.stock < quantity) {
      throw new InsufficientStockError();
    }
    
    return this.cartRepo.addItem(cart.id, {
      productId,
      quantity,
      price: product.price
    });
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>Where is the notification system implemented?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript services/NotificationService.ts
export class NotificationService {
  async notify(userId: string, notification: Notification) {
    const user = await this.userRepo.findById(userId);
    
    if (user.preferences.email) {
      await this.emailService.send(user.email, notification);
    }
    
    if (user.preferences.push) {
      await this.pushService.send(user.deviceToken, notification);
    }
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>How do we handle API errors?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript middleware/ErrorHandler.ts
export class ErrorHandler {
  catch(error: Error, req: Request, res: Response, next: NextFunction) {
    if (error instanceof ValidationError) {
      return res.status(400).json({
        type: 'ValidationError',
        message: error.message
      });
    }
    
    if (error instanceof AuthenticationError) {
      return res.status(401).json({
        type: 'AuthenticationError',
        message: 'Unauthorized'
      });
    }
    
    // Default error
    res.status(500).json({
      type: 'ServerError',
      message: 'Internal server error'
    });
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>Where is the user profile update logic?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript services/ProfileService.ts
export class ProfileService {
  async updateProfile(userId: string, updates: ProfileUpdates): Promise<User> {
    const user = await this.userRepo.findById(userId);
    
    if (updates.email && updates.email !== user.email) {
      await this.verifyEmailUnique(updates.email);
    }
    
    const updatedUser = await this.userRepo.update(userId, updates);
    return this.sanitizeUser(updatedUser);
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>How do we generate PDFs?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript services/PDFGenerator.ts
export class PDFGenerator {
  async generatePDF(template: string, data: any): Promise<Buffer> {
    const html = await this.templateEngine.render(template, data);
    
    const browser = await puppeteer.launch();
    const page = await browser.newPage();
    await page.setContent(html);
    
    const pdf = await page.pdf({
      format: 'A4',
      printBackground: true
    });
    
    await browser.close();
    return pdf;
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>Where is the background job processing handled?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript workers/JobProcessor.ts
export class JobProcessor {
  @Process('email')
  async processEmailJob(job: Job) {
    const { to, subject, content } = job.data;
    await this.emailService.send(to, subject, content);
  }

  @Process('image-resize')
  async processImageResize(job: Job) {
    const { imageUrl, dimensions } = job.data;
    const resized = await this.imageService.resize(imageUrl, dimensions);
    await this.storageService.upload(resized);
  }
}
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>How do we implement the recommendation system?</user_input>
    <snippets>
      <snippet><![CDATA[```python services/recommender.py
class RecommendationEngine:
    def generate_recommendations(self, user_id):
        user_history = self.get_user_history(user_id)
        similar_users = self.find_similar_users(user_history)
        
        recommendations = []
        for user in similar_users:
            items = self.get_user_items(user)
            recommendations.extend(self.filter_unseen_items(items, user_history))
        
        return self.rank_recommendations(recommendations)
```]]></snippet>
    </snippets>
  </example>

  <example>
    <user_input>Where is the analytics tracking implemented?</user_input>
    <snippets>
      <snippet><![CDATA[```typescript services/Analytics.ts
export class AnalyticsService {
  async trackEvent(event: AnalyticsEvent) {
    await this.segmentClient.track({
      userId: event.userId,
      event: event.name,
      properties: event.properties,
      timestamp: new Date()
    });
    
    await this.store.incrementEventCount(event.name);
  }
}
```]]></snippet>
    </snippets>
  </example>
</dataset>