package command;

import controller.CrawlerController;
import java.util.List;
import model.Article;

public class ListCommand implements Command {
    private CrawlerController controller;
    
    public ListCommand(CrawlerController controller) {
        this.controller = controller;
    }
    
    @Override
    public void execute() {
        List<Article> articles = controller.getArticles();
        if (articles.isEmpty()) {
            controller.getView().showMessage("暂无数据");
            return;
        }
        
        controller.getView().showMessage("\n已爬取的数据列表：");
        for (int i = 0; i < articles.size(); i++) {
            Article article = articles.get(i);
            controller.getView().showMessage(
                String.format("[%d] %s - %s", i + 1, article.getSource(), article.getTitle())
            );
        }
    }
    
    @Override
    public String getDescription() {
        return "显示已爬取的数据列表";
    }
}