260 lines
10 KiB
JavaScript
260 lines
10 KiB
JavaScript
/**
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* AKSRT AJAX Pagination & Lazy Load
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*/
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(function () {
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"use strict";
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function hasAjaxConfig() {
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return !!(window.aksrtData && aksrtData.ajaxUrl && aksrtData.nonce);
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}
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function initAjaxPagination(root) {
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var containers = (root || document).querySelectorAll(".aksrt-pagination-ajax, .ajax-pagination");
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if (!containers.length) return;
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var triggerText = (window.aksrtData && aksrtData.ajaxTrigger) || "加载更多";
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var nomoreText = (window.aksrtData && aksrtData.ajaxNomore) || "没有更多了";
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var loadingText = (window.aksrtData && aksrtData.ajaxLoading) || "正在加载...";
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var errorText = (window.aksrtData && aksrtData.ajaxLoadError) || "加载失败，请重试";
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containers.forEach(function (container) {
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if (container.dataset.aksrtPaginationBound === "1") return;
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container.dataset.aksrtPaginationBound = "1";
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var mode = container.dataset.mode || "load_more";
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var nextPage = parseInt(container.dataset.nextPage, 10) || 2;
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var maxPages = parseInt(container.dataset.maxPages, 10) || 1;
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var isComment = container.classList.contains("aksrt-comment-pagination");
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var postId = container.dataset.postId || "";
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var commentOrder = container.dataset.commentOrder || "newest";
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var loading = false;
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var failed = false;
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var loadMoreBtn = container.querySelector(".aksrt-load-more-btn, .ajax-next");
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var indicator = container.querySelector(".aksrt-loading-indicator");
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var successfulAutoLoads = 0;
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var iasMax = isComment
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? ((window.aksrtData && typeof aksrtData.commentIasMax !== "undefined") ? parseInt(aksrtData.commentIasMax, 10) : 0)
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: ((window.aksrtData && typeof aksrtData.iasMax !== "undefined") ? parseInt(aksrtData.iasMax, 10) : 0);
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var homepagePanel = container.closest("[data-home-tab-panel]");
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var target = homepagePanel || container.previousElementSibling;
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if (!homepagePanel && target && target.classList && target.classList.contains("content-stream__footer")) {
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target = target.previousElementSibling;
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}
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if (isComment) {
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var commentList = document.getElementById("comment-list") ||
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(container.parentElement && container.parentElement.querySelector("#comment-list, .commentlist, ol.commentlist"));
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if (commentList) target = commentList;
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}
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if (!target && container.parentElement) {
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target = container.parentElement.querySelector(".post-grid, .comment-list, .commentlist, .content-stream__list");
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}
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function showSkeleton() {
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if (!target) return;
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var loader = target.querySelector(".post-ajax-loader");
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if (loader) {
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loader.classList.add("is-loading");
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}
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}
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function hideSkeleton() {
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if (!target) return;
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var loader = target.querySelector(".post-ajax-loader");
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if (loader) {
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loader.classList.remove("is-loading");
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}
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}
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function stopInfinite(markNomore) {
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container.classList.remove("ias-pending");
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if (markNomore && loadMoreBtn) {
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loadMoreBtn.textContent = nomoreText;
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loadMoreBtn.classList.remove("is-loading");
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loadMoreBtn.classList.add("ajax-nomore");
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loadMoreBtn.style.pointerEvents = "none";
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} else if (loadMoreBtn && !loadMoreBtn.classList.contains("ajax-nomore")) {
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loadMoreBtn.classList.remove("is-loading");
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loadMoreBtn.textContent = failed ? errorText : triggerText;
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loadMoreBtn.style.pointerEvents = "";
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}
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}
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function markFailed(message) {
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failed = true;
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stopInfinite(false);
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if (loadMoreBtn) {
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loadMoreBtn.textContent = message || errorText;
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loadMoreBtn.classList.remove("is-loading");
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loadMoreBtn.classList.remove("ajax-nomore");
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loadMoreBtn.style.pointerEvents = "";
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}
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}
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function loadNextPage(fromAuto) {
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if (loading || failed || nextPage > maxPages || !target) return Promise.resolve(false);
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if (!hasAjaxConfig()) {
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markFailed(errorText);
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return Promise.resolve(false);
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}
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loading = true;
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if (indicator) indicator.style.display = "flex";
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if (loadMoreBtn) {
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loadMoreBtn.classList.add("is-loading");
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loadMoreBtn.textContent = loadingText;
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}
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showSkeleton();
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var action = isComment ? "aksrt_load_more_comments" : "aksrt_load_more_posts";
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var queryContext = container.dataset.queryContext || "";
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var queryVars = container.dataset.queryVars || "";
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var renderConfig = container.dataset.renderConfig || "";
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var body = new URLSearchParams();
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body.set("action", action);
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body.set("nonce", aksrtData.nonce);
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body.set("page", String(nextPage));
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if (queryContext) {
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body.set("query_context", queryContext);
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}
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if (!isComment && queryVars) {
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body.set("query_vars", queryVars);
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}
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if (!isComment && renderConfig) {
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body.set("render_config", renderConfig);
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}
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if (isComment && postId) {
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body.set("post_id", postId);
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body.set("comment_order", commentOrder);
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var authorOnly = container.dataset.authorOnly || "0";
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if (authorOnly === "1") body.set("author_only", "1");
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}
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return fetch(aksrtData.ajaxUrl, {
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method: "POST",
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headers: { "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8" },
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credentials: "same-origin",
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body: body.toString(),
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})
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.then(function (r) {
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if (!r.ok) {
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throw new Error("HTTP " + r.status);
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}
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return r.text().then(function (text) {
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try {
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return JSON.parse(text);
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} catch (err) {
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throw new Error("Invalid JSON");
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}
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});
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})
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.then(function (res) {
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if (!(res && res.success && res.data && typeof res.data.html === "string")) {
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var msg = res && res.data && res.data.message ? res.data.message : errorText;
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markFailed(msg);
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return false;
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}
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var temp = document.createElement("div");
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temp.innerHTML = res.data.html;
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var newItems = temp.children;
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while (newItems.length > 0) {
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if (homepagePanel && container.parentNode === target) {
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target.insertBefore(newItems[0], container);
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} else {
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target.appendChild(newItems[0]);
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}
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}
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if (isComment && window.AksrtFrontend) {
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AksrtFrontend.rehydrate(target, "ajax");
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}
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nextPage++;
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container.dataset.nextPage = String(nextPage);
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if (fromAuto) {
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successfulAutoLoads++;
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}
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if (nextPage > maxPages || !res.data.has_more) {
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stopInfinite(true);
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if (!loadMoreBtn) {
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container.innerHTML = '<span class="ajax-nomore">' + nomoreText + '</span>';
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}
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}
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return true;
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})
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.catch(function () {
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markFailed(errorText);
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return false;
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})
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.finally(function () {
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loading = false;
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hideSkeleton();
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if (indicator) indicator.style.display = "none";
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if (loadMoreBtn && !loadMoreBtn.classList.contains("ajax-nomore") && !failed) {
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loadMoreBtn.classList.remove("is-loading");
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loadMoreBtn.textContent = triggerText;
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if (mode === "infinite") {
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if (iasMax > 0 && successfulAutoLoads >= iasMax) {
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stopInfinite(true);
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} else {
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loadMoreBtn.classList.remove("lazyloaded", "lazyloading");
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loadMoreBtn.classList.add("lazyload");
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if (window.lazySizes && lazySizes.loader) {
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lazySizes.loader.checkElems();
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}
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}
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}
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}
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});
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}
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if (loadMoreBtn) {
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loadMoreBtn.addEventListener("click", function(e) {
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e.preventDefault();
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if (loadMoreBtn.dataset.jumpComments === "1") {
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var jumpInput = container.querySelector(".jump-input");
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if (!jumpInput) return;
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var targetPage = parseInt(jumpInput.value, 10) || 1;
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var max = parseInt(jumpInput.dataset.maxPages || String(maxPages), 10) || maxPages;
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targetPage = Math.max(1, Math.min(max, targetPage));
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var url = new URL(window.location.href);
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url.searchParams.set("cpage", String(targetPage));
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window.location.href = url.toString();
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return;
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}
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if (loadMoreBtn.dataset.jumpArchive === "1") {
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var archiveJumpInput = container.querySelector(".jump-input");
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if (!archiveJumpInput) return;
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var archiveTargetPage = parseInt(archiveJumpInput.value, 10) || 1;
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var archiveMax = parseInt(archiveJumpInput.dataset.maxPages || String(maxPages), 10) || maxPages;
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archiveTargetPage = Math.max(1, Math.min(archiveMax, archiveTargetPage));
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var archiveUrl = new URL(window.location.href);
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archiveUrl.searchParams.set("paged", String(archiveTargetPage));
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window.location.href = archiveUrl.toString();
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return;
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}
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var fromAuto = loadMoreBtn.dataset.lazyAuto === "1";
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delete loadMoreBtn.dataset.lazyAuto;
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if (fromAuto && iasMax > 0 && successfulAutoLoads >= iasMax) {
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stopInfinite(true);
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return;
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}
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// Manual click can recover from a previous auto-load failure.
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failed = false;
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loadNextPage(fromAuto);
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});
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}
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if (mode === "infinite") {
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if ((isComment && window.aksrtData && aksrtData.commentIasAuto === false) || !hasAjaxConfig()) {
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loadMoreBtn.classList.remove("lazyload");
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loadMoreBtn.removeAttribute("lazyload-action");
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return;
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}
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container.classList.add("ias-pending");
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}
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});
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}
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window.AksrtFrontend.register("aksrt-ajax-pagination", function (root) { initAjaxPagination(root); });
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})();
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