java/w9/view/ConsoleView.java

package com.crawler.view;

import java.time.format.DateTimeFormatter;
import java.util.List;
import java.util.Scanner;

import com.crawler.model.Article;
import com.crawler.util.ColorUtil;

public class ConsoleView {
    private static final Scanner scanner = new Scanner(System.in);
    private static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

    public void displayWelcome() {
        System.out.println(ColorUtil.cyan("========================================"));
        System.out.println(ColorUtil.cyan("         Welcome to My Crawler          "));
        System.out.println(ColorUtil.cyan("========================================"));
        System.out.println();
    }

    public void displayHelp() {
        System.out.println(ColorUtil.yellow("Available commands:"));
        System.out.println(ColorUtil.green("  crawl <url> [strategy]  - Crawl a website"));
        System.out.println(ColorUtil.green("  list                    - List all crawled articles"));
        System.out.println(ColorUtil.green("  save                    - Save articles to data file"));
        System.out.println(ColorUtil.green("  load                    - Load articles from data file"));
        System.out.println(ColorUtil.green("  help                    - Show this help message"));
        System.out.println(ColorUtil.green("  exit                    - Exit the application"));
        System.out.println();
        System.out.println(ColorUtil.yellow("Available strategies:"));
        System.out.println(ColorUtil.cyan("  blog                    - Blog crawling strategy"));
        System.out.println(ColorUtil.cyan("  news                    - News crawling strategy"));
        System.out.println(ColorUtil.cyan("  jsoup                   - Generic JSoup strategy (default)"));
        System.out.println();
    }

    public void displayArticleList(List<Article> articles) {
        if (articles.isEmpty()) {
            System.out.println(ColorUtil.yellow("No articles found."));
            return;
        }

        System.out.println(ColorUtil.cyan("=== Crawled Articles (" + articles.size() + ") ==="));
        System.out.println();

        for (int i = 0; i < articles.size(); i++) {
            displayArticleDetail(articles.get(i), i + 1);
        }
    }

    public void displayArticleDetail(Article article, int index) {
        System.out.println(ColorUtil.bold(ColorUtil.green("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━")));
        System.out.println(ColorUtil.bold(ColorUtil.yellow("[" + index + "] " + article.getTitle())));
        System.out.println(ColorUtil.bold(ColorUtil.green("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━")));
        System.out.println(ColorUtil.cyan("  ID: ") + article.getId());
        System.out.println(ColorUtil.cyan("  URL: ") + article.getUrl());
        if (article.getAuthor() != null) {
            System.out.println(ColorUtil.cyan("  Author: ") + article.getAuthor());
        }
        if (article.getSource() != null) {
            System.out.println(ColorUtil.cyan("  Source: ") + article.getSource());
        }
        if (article.getPublishDate() != null) {
            System.out.println(ColorUtil.cyan("  Published: ") + article.getPublishDate().format(DATE_FORMATTER));
        }
        System.out.println(ColorUtil.cyan("  Crawled: ") + article.getCrawlDate().format(DATE_FORMATTER));
        System.out.println(ColorUtil.cyan("  Content: "));
        if (article.getContent() != null) {
            String[] lines = article.getContent().split("(?<=\\G.{80})");
            for (String line : lines) {
                System.out.println("    " + line);
            }
        }
        System.out.println();
    }

    public void displaySuccess(String message) {
        System.out.println(ColorUtil.green("✓ " + message));
    }

    public void displayError(String message) {
        System.out.println(ColorUtil.red("✗ " + message));
    }

    public void displayInfo(String message) {
        System.out.println(ColorUtil.blue("ℹ " + message));
    }

    public void displayWarning(String message) {
        System.out.println(ColorUtil.yellow("⚠ " + message));
    }

    public String readInput() {
        System.out.print(ColorUtil.purple("> "));
        return scanner.nextLine().trim();
    }

    public void displayGoodbye() {
        System.out.println(ColorUtil.cyan("Goodbye! Thank you for using My Crawler."));
    }
}