feat: 实现评论系统（后端 + 前端）
- 新增 Comment/CommentMention 模型，Post 新增 CommentsCount 冗余计数器 - 新增 CommentRepo（CRUD + @搜索 LV3+ + 回复统计 + 文章作者查询） - 新增 CommentService（发表/回复/删除/@解析/通知 NotifyComment/NotifyCommentReply） - 新增 CommentController（6 个 API 端点），commentUseCase ISP 接口 - 新增评论路由（公开读取 + 需登录写入），依赖注入，错误哨兵，数据库迁移 - 前端评论区 HTML/CSS/JS：分页加载、回复折叠展开、内联回复表单、@提及自动补全
This commit is contained in:
@ -71,6 +71,31 @@
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</div>
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</div>
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{{end}}
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<!-- 评论区 -->
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{{if .Post.AllowComment}}
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<section class="comments-section" id="comments">
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<h3 class="comments-title">评论 <span class="comments-count" id="commentsTotal">0</span></h3>
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{{if .IsLoggedIn}}
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<div class="comment-form">
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<textarea class="comment-input" id="commentInput" placeholder="写下你的评论..." rows="3" maxlength="5000"></textarea>
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<button class="btn btn-primary comment-submit-btn" id="commentSubmitBtn">发表评论</button>
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</div>
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{{else}}
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<div class="comment-login-hint">
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<a href="/login?redirect=/posts/{{$.Post.ID}}">登录</a> 后参与评论
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</div>
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{{end}}
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<div class="comments-list" id="commentsList"></div>
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<div class="comments-loading" id="commentsLoading" style="display:none">加载中...</div>
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<button class="btn btn-secondary comments-load-more" id="commentsLoadMore" style="display:none">加载更多</button>
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</section>
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{{end}}
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<!-- @ 提及下拉 -->
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<div class="mention-dropdown" id="mentionDropdown" style="display:none"></div>
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</div>
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{{template "layout/footer.html" .}}
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@ -219,5 +244,405 @@
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});
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})();
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</script>
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<script>
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// ========== 评论系统 ==========
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(function() {
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var commentsSection = document.getElementById('comments');
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if (!commentsSection) return;
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var postId = '{{.Post.ID}}';
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var commentsList = document.getElementById('commentsList');
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var commentsTotal = document.getElementById('commentsTotal');
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var loadMoreBtn = document.getElementById('commentsLoadMore');
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var commentInput = document.getElementById('commentInput');
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var commentSubmitBtn = document.getElementById('commentSubmitBtn');
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var mentionDropdown = document.getElementById('mentionDropdown');
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var csrfMeta = document.querySelector('meta[name="csrf-token"]');
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var csrfToken = csrfMeta ? csrfMeta.getAttribute('content') : '';
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var currentPage = 1;
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var totalPages = 1;
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// ====== 工具函数 ======
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function api(method, url, data) {
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var opts = { method: method, headers: { 'Content-Type': 'application/json' } };
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if (csrfToken) opts.headers['X-CSRF-Token'] = csrfToken;
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if (data) opts.body = JSON.stringify(data);
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return fetch(url, opts).then(function(r) { return r.json(); });
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}
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function escapeHtml(text) {
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var d = document.createElement('div');
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d.textContent = text;
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return d.innerHTML;
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}
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function formatTime(iso) {
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var d = new Date(iso);
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var pad = function(n) { return n < 10 ? '0'+n : n; };
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return d.getFullYear() + '-' + pad(d.getMonth()+1) + '-' + pad(d.getDate()) + ' ' + pad(d.getHours()) + ':' + pad(d.getMinutes());
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}
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// ====== 渲染评论 HTML ======
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function buildCommentCard(c) {
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var time = c.created_at ? formatTime(c.created_at) : '';
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var author = c.author_name ? escapeHtml(c.author_name) : '用户已注销';
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var body = c.body || '';
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// 渲染 @ 提及为链接
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body = escapeHtml(body);
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body = body.replace(/@(\S{1,16})/g, '<span class="reply-to">@$1</span>');
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var html = '<div class="comment-card" data-id="' + c.id + '">' +
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'<div class="comment-header">' +
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'<span class="comment-author">' + author + '</span>' +
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'<span class="comment-time">' + time + '</span>' +
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'</div>' +
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'<div class="comment-body">' + body + '</div>' +
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'<div class="comment-actions">';
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if (isLoggedIn()) {
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html += '<button class="comment-action-btn comment-reply-btn" data-id="'+c.id+'">回复</button>';
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}
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html += '</div>' +
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// 回复区域
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'<div class="comment-replies" id="replies-' + c.id + '"></div>';
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if (c.replies_count > 0) {
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html += '<button class="comment-toggle-replies" id="toggle-' + c.id + '" data-id="'+c.id+'" data-loaded="false">共 ' + c.replies_count + ' 条回复</button>';
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}
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// 回复输入框（默认隐藏）
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html += '<div class="comment-reply-form" id="replyForm-' + c.id + '" style="display:none">' +
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'<textarea class="comment-reply-input" id="replyInput-' + c.id + '" rows="2" placeholder="写下回复..." maxlength="5000"></textarea>' +
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'<button class="btn btn-primary comment-reply-submit" data-id="' + c.id + '">回复</button>' +
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'</div>' +
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'</div>';
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return html;
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}
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function buildReplyCard(r) {
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var time = r.created_at ? formatTime(r.created_at) : '';
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var author = r.author_name ? escapeHtml(r.author_name) : '用户已注销';
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var body = r.body || '';
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body = escapeHtml(body);
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body = body.replace(/@(\S{1,16})/g, '<span class="reply-to">@$1</span>');
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var prefix = '';
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if (r.reply_to_name) {
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prefix = '<span class="comment-reply-to">回复 ' + escapeHtml(r.reply_to_name) + ':</span>';
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}
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return '<div class="comment-reply-card" data-id="' + r.id + '">' +
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'<div class="comment-header">' +
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'<span class="comment-author" style="font-size:13px">' + author + '</span>' +
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'<span class="comment-time" style="font-size:11px">' + time + '</span>' +
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'</div>' +
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'<div class="comment-reply-body">' + prefix + body + '</div>' +
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'</div>';
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}
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function isLoggedIn() {
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return !!document.getElementById('commentInput');
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}
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// ====== 加载根评论 ======
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function loadComments(page) {
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var url = '/api/posts/' + postId + '/comments?page=' + page + '&page_size=20';
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fetch(url).then(function(r) { return r.json(); })
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.then(function(d) {
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if (!d.success) return;
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totalPages = d.data.total_pages || 1;
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commentsTotal.textContent = '(' + d.data.total + ')';
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var items = d.data.items || [];
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for (var i = 0; i < items.length; i++) {
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commentsList.insertAdjacentHTML('beforeend', buildCommentCard(items[i]));
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}
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if (page < totalPages) {
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loadMoreBtn.style.display = 'block';
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loadMoreBtn.textContent = '加载更多';
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} else {
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loadMoreBtn.style.display = 'none';
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}
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bindEvents();
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})
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.catch(function() {
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commentsList.innerHTML = '<div class="empty-state">评论加载失败</div>';
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});
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}
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// ====== 绑定事件 ======
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function bindEvents() {
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// 回复按钮
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var replyBtns = commentsList.querySelectorAll('.comment-reply-btn');
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for (var i = 0; i < replyBtns.length; i++) {
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if (replyBtns[i]._bound) continue;
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replyBtns[i]._bound = true;
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bindReplyBtn(replyBtns[i]);
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}
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// 展开回复按钮
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var toggleBtns = commentsList.querySelectorAll('.comment-toggle-replies');
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for (var j = 0; j < toggleBtns.length; j++) {
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if (toggleBtns[j]._bound) continue;
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toggleBtns[j]._bound = true;
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bindToggleBtn(toggleBtns[j]);
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}
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// 回复提交按钮
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var submitBtns = commentsList.querySelectorAll('.comment-reply-submit');
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for (var k = 0; k < submitBtns.length; k++) {
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if (submitBtns[k]._bound) continue;
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submitBtns[k]._bound = true;
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bindReplySubmit(submitBtns[k]);
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}
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// 回复输入框 @提及
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var replyInputs = commentsList.querySelectorAll('.comment-reply-input');
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for (var m = 0; m < replyInputs.length; m++) {
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if (replyInputs[m]._mentionBound) continue;
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replyInputs[m]._mentionBound = true;
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bindMention(replyInputs[m]);
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}
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}
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function bindReplyBtn(btn) {
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btn.addEventListener('click', function() {
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var id = btn.dataset.id;
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var form = document.getElementById('replyForm-' + id);
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if (form) {
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form.style.display = form.style.display === 'none' ? 'flex' : 'none';
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if (form.style.display !== 'none') {
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document.getElementById('replyInput-' + id).focus();
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}
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}
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});
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}
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function bindToggleBtn(btn) {
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btn.addEventListener('click', function() {
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var id = btn.dataset.id;
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var loaded = btn.dataset.loaded === 'true';
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if (loaded) {
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// 切换显示/隐藏
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var replies = document.getElementById('replies-' + id);
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if (replies) {
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replies.style.display = replies.style.display === 'none' ? 'block' : 'none';
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btn.textContent = replies.style.display === 'none' ? '共 ' + (btn.dataset.count || replies.children.length) + ' 条回复' : '收起回复';
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}
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return;
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}
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// 首次加载
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btn.dataset.loaded = 'true';
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btn.textContent = '加载中...';
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fetch('/api/posts/' + postId + '/comments/' + id + '/replies')
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.then(function(r) { return r.json(); })
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.then(function(d) {
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if (!d.success) return;
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var replies = d.data.replies || [];
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var container = document.getElementById('replies-' + id);
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if (!container) return;
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var html = '';
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for (var i = 0; i < replies.length; i++) {
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html += buildReplyCard(replies[i]);
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}
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container.innerHTML = html;
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btn.dataset.count = replies.length;
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btn.textContent = '收起回复';
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})
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.catch(function() {
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btn.textContent = '加载失败';
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});
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});
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}
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function bindReplySubmit(btn) {
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btn.addEventListener('click', function() {
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var id = btn.dataset.id;
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var input = document.getElementById('replyInput-' + id);
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if (!input) return;
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var body = input.value.trim();
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if (!body) { alert('请输入回复内容'); return; }
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btn.disabled = true;
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api('POST', '/api/comments/' + id + '/reply', { body: body })
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.then(function(d) {
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btn.disabled = false;
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if (d.success) {
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input.value = '';
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document.getElementById('replyForm-' + id).style.display = 'none';
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// 刷新回复列表
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var toggleBtn = document.getElementById('toggle-' + id);
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if (toggleBtn) {
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toggleBtn.dataset.loaded = 'false';
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if (toggleBtn.dataset.count) {
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toggleBtn.dataset.count = parseInt(toggleBtn.dataset.count) + 1;
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toggleBtn.textContent = '共 ' + toggleBtn.dataset.count + ' 条回复';
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}
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toggleBtn.click();
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} else {
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// 没有展开按钮，新建一个
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var replies = document.getElementById('replies-' + id);
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if (replies) {
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fetch('/api/posts/' + postId + '/comments/' + id + '/replies')
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.then(function(r) { return r.json(); })
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.then(function(d2) {
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if (!d2.success) return;
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var items = d2.data.replies || [];
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var html = '';
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for (var i = 0; i < items.length; i++) {
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html += buildReplyCard(items[i]);
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}
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replies.innerHTML = html;
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});
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}
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}
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updateTotalCount(1);
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} else {
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alert(d.message || '回复失败');
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}
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})
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.catch(function() {
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btn.disabled = false;
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alert('请求失败');
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});
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});
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}
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// ====== @提及自动补全 ======
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var mentionTarget = null;
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var mentionPos = 0;
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var searchTimer = null;
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function bindMention(input) {
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input.addEventListener('input', function() {
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var val = input.value;
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var cursor = input.selectionStart;
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// 查找光标前的最后一个 @
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var atPos = val.lastIndexOf('@', cursor - 1);
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if (atPos === -1 || (atPos > 0 && val[atPos - 1] !== ' ' && val[atPos - 1] !== '\n')) {
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hideMention();
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return;
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}
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var query = val.substring(atPos + 1, cursor);
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if (query.length === 0 || query.includes(' ')) {
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hideMention();
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return;
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}
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mentionTarget = input;
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mentionPos = atPos;
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clearTimeout(searchTimer);
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searchTimer = setTimeout(function() {
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fetch('/api/users/search?q=' + encodeURIComponent(query))
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.then(function(r) { return r.json(); })
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.then(function(d) {
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if (d.success && d.data && d.data.length > 0) {
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showMention(input, d.data, query);
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} else {
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hideMention();
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}
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})
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.catch(function() { hideMention(); });
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}, 200);
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});
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input.addEventListener('blur', function() {
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setTimeout(hideMention, 150);
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});
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}
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function showMention(input, users, query) {
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var rect = input.getBoundingClientRect();
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var dropdown = mentionDropdown;
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dropdown.innerHTML = '';
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dropdown.style.display = 'block';
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dropdown.style.top = (rect.bottom + window.scrollY + 4) + 'px';
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dropdown.style.left = (rect.left + window.scrollX) + 'px';
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dropdown.style.width = Math.max(rect.width, 200) + 'px';
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for (var i = 0; i < users.length; i++) {
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var u = users[i];
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var item = document.createElement('div');
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item.className = 'mention-item';
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item.innerHTML = '<span class="mention-username">' + escapeHtml(u.username) + '</span><span class="mention-uid">' + escapeHtml(u.uid) + '</span>';
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item.addEventListener('mousedown', function(e) {
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e.preventDefault();
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selectMention(u);
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});
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dropdown.appendChild(item);
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}
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}
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function hideMention() {
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mentionDropdown.style.display = 'none';
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mentionDropdown.innerHTML = '';
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mentionTarget = null;
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}
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function selectMention(user) {
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if (!mentionTarget) return;
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var val = mentionTarget.value;
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var before = val.substring(0, mentionPos);
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var after = val.substring(mentionTarget.selectionStart);
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var insert = '@' + user.username + ' ';
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mentionTarget.value = before + insert + after;
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mentionTarget.focus();
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var newPos = mentionPos + insert.length;
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mentionTarget.setSelectionRange(newPos, newPos);
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hideMention();
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}
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// ====== 发表评论 ======
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if (commentSubmitBtn) {
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commentSubmitBtn.addEventListener('click', function() {
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var body = commentInput.value.trim();
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if (!body) { alert('请输入评论内容'); return; }
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commentSubmitBtn.disabled = true;
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api('POST', '/api/posts/' + postId + '/comments', { body: body })
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.then(function(d) {
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commentSubmitBtn.disabled = false;
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if (d.success) {
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commentInput.value = '';
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// 刷新列表
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commentsList.innerHTML = '';
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currentPage = 1;
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loadComments(currentPage);
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updateTotalCount(1);
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} else {
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alert(d.message || '发表失败');
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}
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})
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.catch(function() {
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commentSubmitBtn.disabled = false;
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alert('请求失败');
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});
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});
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// 主输入框 @提及
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bindMention(commentInput);
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}
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// ====== 加载更多 ======
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loadMoreBtn.addEventListener('click', function() {
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currentPage++;
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loadComments(currentPage);
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});
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function updateTotalCount(delta) {
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var el = commentsTotal;
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var current = parseInt(el.textContent.replace(/[()]/g, '')) || 0;
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el.textContent = '(' + (current + delta) + ')';
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}
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// ====== 初始化 ======
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loadComments(currentPage);
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})();
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||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
Reference in New Issue
Block a user