java/w10/PlatformCommand.java

package command;

import strategy.CrawlerStrategy;
import strategy.StrategyFactory;
import view.ConsoleView;
import java.util.List;
import repository.PaperRepository;

public class PlatformCommand implements Command {
    private StrategyFactory strategyFactory;
    private ConsoleView view;
    
    public PlatformCommand(ConsoleView view, StrategyFactory strategyFactory) {
        this.view = view;
        this.strategyFactory = strategyFactory;
    }
    
    @Override
    public void execute(String[] args, PaperRepository repository) {
        List<CrawlerStrategy> strategies = strategyFactory.getAllStrategies();
        
        if (strategies.isEmpty()) {
            view.showInfo("暂不支持任何论文平台");
        } else {
            view.showInfo("当前支持 " + strategies.size() + " 个论文平台:");
            System.out.println();
            
            int index = 1;
            for (CrawlerStrategy strategy : strategies) {
                System.out.println(index + ". " + strategy.getPlatformName());
                index++;
            }
            
            System.out.println();
            view.showInfo("使用示例: crawl <平台URL>");
            view.showInfo("例如: crawl https://arxiv.org/search/?query=machine+learning");
        }
    }
    
    @Override
    public String getDescription() {
        return "显示支持的论文平台列表";
    }
    
    @Override
    public String getName() {
        return "platforms";
    }
}