java/w10/AnalyzeCommand.java

public class AnalyzeCommand implements Command {

    private static final Pattern URL_PATTERN =
            Pattern.compile("^(https?://)?([\\w-]+\\.)+[\\w-]+(/[\\w-./?%&=]*)*$");

    private final ConsoleView view;
    private final StrategyFactory strategyFactory;

    public AnalyzeCommand(ConsoleView view, StrategyFactory strategyFactory) {
        this.view = view;
        this.strategyFactory = strategyFactory;
    }

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

    @Override
    public void execute(String[] args, List<Article> unused) {

        if (args.length < 2) {
            view.printError("用法:analyze <url>");
            return;
        }

        String url = args[1];


        if (!isValidUrl(url)) {
            view.printError("无效的URL格式：" + url);
            return;
        }

        try {
        
            List<Article> parsedArticles = strategyFactory.getStrategy(url).crawl(url);

        
            printAnalysisResult(url, parsedArticles);

        } catch (Exception e) {
            view.printError("解析失败：" + e.getMessage());
        }
    }

    private void printAnalysisResult(String url, List<Article> articles) {
        view.printInfo("解析统计结果 ");
        view.printInfo("目标 URL:" + url);
        view.printInfo("解析到文章数量：" + articles.size());

        if (!articles.isEmpty()) {
            Article first = articles.get(0);
            view.printInfo("首篇文章标题：" + first.getTitle());
            view.printInfo("首篇文章作者：" + first.getAuthor());
            view.printInfo("首篇发布日期：" + first.getPublishDate());
        }
    }

    private boolean isValidUrl(String url) {
        return url != null && URL_PATTERN.matcher(url).matches();
    }
}