src/main/java/com/example/myproject/service/PromotionService.java

package com.example.myproject.service;

import com.example.myproject.entity.Promotion;
import com.example.myproject.dto.PromotionCreateDTO;
import java.util.List;

public interface PromotionService {
    Promotion createPromotion(PromotionCreateDTO promotionDTO);
    
    List<Promotion> getAllActivePromotions();
    
    Promotion getPromotionById(Long promotionId);
    
    void deletePromotion(Long promotionId);
    
    double getCurrentDiscount(Long torrentId);
}