java/w12/main/java/com/music/command/CrawlCommand.java

package com.music.command;

import com.music.exception.CrawlerException;
import com.music.repository.SongRepository;
import com.music.strategy.CrawlStrategy;
import com.music.strategy.StrategyFactory;
import com.music.view.ConsoleView;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class CrawlCommand implements Command {
    private static final Logger logger = LoggerFactory.getLogger(CrawlCommand.class);
    private final ConsoleView view;
    private final StrategyFactory factory;

    public CrawlCommand(ConsoleView view, StrategyFactory factory) {
        this.view = view;
        this.factory = factory;
    }

    @Override
    public String getName() {
        return "crawl";
    }

    @Override
    public void execute(String[] args, SongRepository repository) {
        if (args.length < 2) {
            view.printError("用法: crawl <platform>  (netease/qq/kugou)");
            return;
        }
        String platform = args[1];
        CrawlStrategy strategy = factory.getStrategy(platform);
        if (strategy == null) {
            view.printError("不支持的平台: " + platform + "，可选：netease, qq, kugou");
            return;
        }
        view.printInfo("正在爬取 " + platform + " 热歌榜...");
        try {
            var songs = strategy.crawl(50);  // 爬取前50首
            repository.addAll(songs);
            view.printSuccess(String.format("成功爬取 %d 首歌曲", songs.size()));
            logger.info("爬取完成，平台={}, 数量={}", platform, songs.size());
        } catch (CrawlerException e) {
            view.printError("爬取失败: " + e.getMessage());
            logger.error("爬取异常", e);
        } catch (Exception e) {
            view.printError("未知错误: " + e.getMessage());
            logger.error("未知异常", e);
        }
    }
}