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/**

* RSS 订阅显示模块

* 负责在页面上显示 RSS 订阅内容

*/

class RSSDisplay {

constructor() {

this.rssReader = rssReader;

this.maxArticles = 10;

}

/**

* 初始化 RSS 显示

*/

async init() {

console.log('初始化 RSS 显示...');

const container = document.querySelector('.rss-feed-container');

if (!container) {

console.log('未找到 RSS 显示容器');

return;

}

// 显示加载状态

this.showLoading(container);

try {

// 获取 RSS 数据

const articles = await this.rssReader.fetchAllFeeds();

if (articles.length === 0) {

this.showEmpty(container);

return;

}

// 显示文章

this.displayArticles(container, articles.slice(0, this.maxArticles));

console.log(`RSS 显示完成，共 ${articles.length} 篇文章`);

} catch (error) {

console.error('RSS 显示失败:', error);

this.showError(container);

}

}

/**

* 显示加载状态

*/

showLoading(container) {

container.innerHTML = `

<div class="rss-loading">

<i class="fa fa-spinner fa-spin"></i>

<span>正在加载订阅内容...</span>

</div>

`;

}

/**

* 显示错误信息

*/

showError(container) {

container.innerHTML = `

<div class="rss-error">

<i class="fa fa-exclamation-circle"></i>

<span>无法加载订阅内容</span>

<button class="retry-btn" onclick="rssDisplay.init()">

<i class="fa fa-refresh"></i> 重试

</button>

</div>

`;

}

/**

* 显示空状态

*/

showEmpty(container) {

container.innerHTML = `

<div class="rss-empty">

<i class="fa fa-rss"></i>

<span>暂无订阅内容</span>

<p>敬请期待更多精彩文章</p>

</div>

`;

}

/**

* 显示文章列表

*/

displayArticles(container, articles) {

const html = `

<div class="rss-feed-header">

<div class="rss-feed-title">

<i class="fa fa-rss"></i>

<span>最新订阅</span>

</div>

<div class="rss-feed-meta">

<span class="article-count">${articles.length} 篇文章</span>

<span class="last-update">更新于 ${new Date().toLocaleString('zh-CN')}</span>

</div>

</div>

<div class="rss-articles-list">

${articles.map((article, index) => this.renderArticle(article, index)).join('')}

</div>

<div class="rss-feed-footer">

<a href="./blog.html" class="view-all-link">

查看全部文章 <i class="fa fa-arrow-right"></i>

</a>

<a href="./blog/feed.xml" class="rss-link" target="_blank" title="RSS 订阅">

<i class="fa fa-rss"></i> RSS

</a>

</div>

`;

container.innerHTML = html;

container.classList.remove('rss-loading');

}

/**

* 渲染单篇文章

*/

renderArticle(article, index) {

const truncatedDesc = this.rssReader.truncate(article.description, 120);

const formattedDate = this.rssReader.formatDate(article.pubDate);

const animationDelay = index * 0.1;

return `

<article class="rss-article" style="animation-delay: ${animationDelay}s">

<div class="article-header">

<div class="article-category">${article.category || '未分类'}</div>

<div class="article-date">

<i class="fa fa-clock-o"></i>

<time datetime="${article.pubDate.toISOString()}">${formattedDate}</time>

</div>

</div>

<h3 class="article-title">

<a href="${article.link}" title="${article.title}">

${article.title}

</a>

</h3>

<p class="article-description">${truncatedDesc}</p>

<div class="article-footer">

<div class="article-author">

<i class="fa fa-user"></i>

<span>${article.author || 'Jackson'}</span>

</div>

<a href="${article.link}" class="read-more-link">

阅读全文 <i class="fa fa-arrow-right"></i>

</a>

</div>

</article>

`;

}

/**

* 创建 RSS 订阅按钮

*/

createRSSButton() {

const button = document.createElement('a');

button.href = './blog/feed.xml';

button.className = 'rss-subscribe-button';

button.target = '_blank';

button.title = '订阅 RSS';

button.innerHTML = '<i class="fa fa-rss"></i> RSS 订阅';

return button;

}

/**

* 在指定位置插入 RSS 按钮

*/

insertRSSButton(selector) {

const container = document.querySelector(selector);

if (container) {

container.appendChild(this.createRSSButton());

}

}

/**

* 手动刷新

*/

async refresh() {

console.log('刷新 RSS 数据...');

localStorage.removeItem('rss-feed-cache');

await this.init();

}

/**

* 设置最大文章数

*/

setMaxArticles(count) {

this.maxArticles = count;

}

}

// 创建全局实例

const rssDisplay = new RSSDisplay();

// 页面加载完成后自动初始化

if (document.readyState === 'loading') {

document.addEventListener('DOMContentLoaded', () => rssDisplay.init());

} else {

rssDisplay.init();

}

// 导出供其他模块使用

if (typeof module !== 'undefined' && module.exports) {

module.exports = RSSDisplay;

}