261 lines
7.8 KiB
JavaScript
261 lines
7.8 KiB
JavaScript
// 播放页评论：只读列表 + 「查看更多评论」追加翻页
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(function () {
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var commentsRoot = document.querySelector("[data-play-comments]");
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if (!commentsRoot) return;
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var listEl = document.querySelector("[data-comment-list]");
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var totalEl = document.querySelector("[data-comment-total-label]");
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var moreBtn = document.querySelector("[data-comment-more]");
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var loadingMore = false;
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var PAGE_SIZE = 4;
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function toast(message, type) {
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if (typeof window.showToast === "function") {
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window.showToast(message, type);
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return;
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}
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}
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function toInt(v, fallback) {
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var n = parseInt(v, 10);
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return isNaN(n) ? fallback || 0 : n;
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}
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function escapeHtml(s) {
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return String(s == null ? "" : s)
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.replace(/&/g, "&")
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.replace(/</g, "<")
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.replace(/>/g, ">")
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.replace(/"/g, """);
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}
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function getPageSize() {
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return Math.max(
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1,
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toInt(commentsRoot.getAttribute("data-comment-size"), PAGE_SIZE)
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);
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}
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function getPage() {
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return Math.max(
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1,
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toInt(commentsRoot.getAttribute("data-comment-page"), 1)
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);
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}
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function getLoaded() {
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if (!listEl) return 0;
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return listEl.querySelectorAll(".play-comment:not(.play-comment--empty)").length;
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}
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function setPagerState(page, loaded, total) {
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if (page != null) commentsRoot.setAttribute("data-comment-page", String(page));
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if (loaded != null) commentsRoot.setAttribute("data-comment-loaded", String(loaded));
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if (total != null) commentsRoot.setAttribute("data-comment-total", String(total));
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syncMoreButton(total != null ? total : toInt(commentsRoot.getAttribute("data-comment-total"), 0));
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}
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function syncMoreButton(total) {
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if (!moreBtn) return;
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var loaded = getLoaded();
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var hasMore = total > loaded;
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if (hasMore) {
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moreBtn.hidden = false;
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moreBtn.removeAttribute("hidden");
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} else {
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moreBtn.hidden = true;
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moreBtn.setAttribute("hidden", "");
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}
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}
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function formatTime(raw) {
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var s = String(raw || "").trim();
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if (!s) return "刚刚";
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var d = new Date(s);
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if (isNaN(d.getTime())) return s;
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return (
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d.getFullYear() +
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"/" +
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(d.getMonth() + 1) +
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"/" +
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d.getDate() +
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" " +
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String(d.getHours()).padStart(2, "0") +
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":" +
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String(d.getMinutes()).padStart(2, "0")
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);
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}
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function renderCommentItem(item) {
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item = item || {};
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var avatar = String(item.userAvatar || "").trim();
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var name = escapeHtml(item.userName || "匿名用户");
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var text = escapeHtml(item.text || "");
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var time = escapeHtml(formatTime(item.createdAt));
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var like = toInt(item.countLike, 0);
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var avatarHtml = avatar
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? '<img class="play-comment__avatar lazy" src="/static/images/placeholder.png?v=2" data-src="' +
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escapeHtml(avatar) +
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'" alt="" loading="lazy" decoding="async">'
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: '<img class="play-comment__avatar" src="/static/images/placeholder.png?v=2" data-src="/static/images/profile/avatar.png" alt="" loading="lazy" decoding="async">';
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var children = Array.isArray(item.children) ? item.children : [];
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var replies = children
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.map(function (child) {
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var cName = escapeHtml(child.userName || "用户");
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var replyTo = child.replyUserName
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? " 回复 " + escapeHtml(child.replyUserName)
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: "";
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return (
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'<div class="play-comment__reply">' +
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cName +
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replyTo +
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"：" +
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escapeHtml(child.text || "") +
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"</div>"
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);
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})
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.join("");
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var commentId = escapeHtml(item.id || "");
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return (
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'<li class="play-comment" data-comment-id="' +
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commentId +
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'">' +
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avatarHtml +
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'<div class="play-comment__body">' +
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'<div class="play-comment__meta">' +
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'<span class="play-comment__name">' +
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name +
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"</span>" +
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'<span class="play-comment__time">' +
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time +
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"</span>" +
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"</div>" +
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'<p class="play-comment__text">' +
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text +
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"</p>" +
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replies +
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'<div class="play-comment__actions">' +
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'<span class="play-comment__action">' +
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'<img class="icon" src="/static/images/placeholder.png?v=2" data-src="/static/images/heart.svg" alt="" loading="lazy" decoding="async">' +
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"<span>" +
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escapeHtml(like) +
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"</span>" +
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"</span>" +
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"</div></div></li>"
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);
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}
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function getLoadedIds() {
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var ids = Object.create(null);
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if (!listEl) return ids;
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listEl.querySelectorAll(".play-comment[data-comment-id]").forEach(function (el) {
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var id = String(el.getAttribute("data-comment-id") || "").trim();
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if (id) ids[id] = true;
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});
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return ids;
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}
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function updateTotal(n) {
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if (!totalEl) return;
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totalEl.textContent = n > 0 ? n + " 条" : "暂无评论";
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}
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// 下一页追加到现有列表底部，不替换已展示评论。
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function appendList(list, totalCount) {
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if (!listEl) return;
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list = Array.isArray(list) ? list : [];
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var total =
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typeof totalCount === "number"
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? totalCount
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: toInt(commentsRoot.getAttribute("data-comment-total"), 0);
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if (typeof totalCount === "number") {
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updateTotal(totalCount);
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}
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if (!list.length) {
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setPagerState(getPage(), getLoaded(), total);
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return;
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}
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var empty = listEl.querySelector(".play-comment--empty");
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if (empty) empty.remove();
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var existing = getLoadedIds();
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var fresh = list.filter(function (item) {
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var id = String((item && item.id) || "").trim();
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return id && !existing[id];
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});
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if (!fresh.length) {
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setPagerState(getPage(), getLoaded(), total);
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return;
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}
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var wrap = document.createElement("ul");
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wrap.innerHTML = fresh.map(renderCommentItem).join("");
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var nodes = [];
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while (wrap.firstChild) {
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nodes.push(wrap.firstChild);
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listEl.appendChild(wrap.firstChild);
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}
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if (typeof window.initLazyImages === "function") {
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nodes.forEach(function (node) {
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if (node && node.nodeType === 1) window.initLazyImages(node);
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});
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window.initLazyImages(listEl);
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}
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setPagerState(getPage(), getLoaded(), total);
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}
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function fetchCommentPage(pageNum) {
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if (!window.HttpRequest || typeof window.HttpRequest.get !== "function") {
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return Promise.reject(new Error("评论服务未就绪"));
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}
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var objectId = toInt(commentsRoot.getAttribute("data-object-id"), 0);
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var objectType = toInt(commentsRoot.getAttribute("data-object-type"), 10);
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if (objectId <= 0) return Promise.reject(new Error("缺少评论对象"));
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var pageSize = getPageSize();
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return window.HttpRequest.get("/api/comment/list", {
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params: {
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objectId: objectId,
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objectType: objectType,
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pageNum: pageNum,
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pageSize: pageSize,
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sortOrder: 1,
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},
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}).then(function (res) {
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if (!res || Number(res.code) !== 200 || !res.data) {
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throw new Error((res && (res.tip || res.msg)) || "加载失败");
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}
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return res.data;
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});
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}
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function loadMoreComments() {
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if (loadingMore || !moreBtn) return;
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var nextPage = getPage() + 1;
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loadingMore = true;
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moreBtn.disabled = true;
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fetchCommentPage(nextPage)
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.then(function (data) {
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var list = data.list || [];
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var total = toInt(data.totalCount, 0);
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commentsRoot.setAttribute("data-comment-page", String(nextPage));
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// 只追加，绝不 renderList 整表替换
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appendList(list, total);
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})
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.catch(function (err) {
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toast((err && err.message) || "加载失败，请稍后重试", "error");
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})
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.finally(function () {
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loadingMore = false;
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if (moreBtn) moreBtn.disabled = false;
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});
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}
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if (moreBtn) {
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moreBtn.addEventListener("click", function (event) {
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event.preventDefault();
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loadMoreComments();
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});
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}
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})();
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