java/w10/AnalyzeCommand.java

package com.example.datacollect.command;

import com.example.datacollect.factory.StrategyFactory;
import com.example.datacollect.model.Article;
import com.example.datacollect.view.ConsoleView;
import java.util.List;
import java.util.regex.Pattern;

public class AnalyzeCommand implements Command {
    // URL 格式校验正则（和 CrawlCommand 保持一致）
    private static final Pattern URL_PATTERN =
            Pattern.compile("^(https?://)?([\\w-]+\\.)+[\\w-]+(/[\\w-./?%&=]*)*$");

    private final ConsoleView view;
    private final StrategyFactory strategyFactory;

    // 构造方法：只依赖 View 和 StrategyFactory，不依赖 Repository
    public AnalyzeCommand(ConsoleView view, StrategyFactory strategyFactory) {
        this.view = view;
        this.strategyFactory = strategyFactory;
    }

    @Override
    public String getName() {
        // 命令名：analyze
        return "analyze";
    }

    @Override
    public void execute(String[] args, List<Article> unused) {
        // 1. 校验参数
        if (args.length < 2) {
            view.printError("用法:analyze <url>");
            return;
        }

        String url = args[1];

        // 2. 校验 URL 格式
        if (!isValidUrl(url)) {
            view.printError("无效的 URL 格式：" + url);
            return;
        }

        try {
            // 3. 复用 StrategyFactory 获取策略，解析 URL
            List<Article> parsedArticles = strategyFactory.getStrategy(url).crawl(url);

            // 4. 关键：只输出统计信息，不存入 ArticleRepository
            printAnalysisResult(url, parsedArticles);

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

    /**
     * 只输出解析结果，不修改任何数据存储
     */
    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();
    }
}