/**
* AKSRT CMS Download
*
* 功能：
* - 监听 [data-action="aksrt-download"] 按钮点击
* - 调 POST /aksrt/v1/download/request
* - 弹窗显示下载链接（含提取码）
*
* 依赖：
* - window.aksrtData.{ ajaxUrl, nonce, siteUrl }
* - 主题已加载 fetch (现代浏览器)
*/
(function () {
'use strict';
if (!window.aksrtData) return;
const REST_BASE = window.aksrtData.siteUrl ? window.aksrtData.siteUrl.replace(/\/$/, '') + '/wp-json/aksrt/v1' : '/wp-json/aksrt/v1';
function tt(key, zh) { return zh; }
function escapeHtml(value) {
return String(value == null ? '' : value)
.replace(/&/g, '&')
.replace(//g, '>')
.replace(/"/g, '"')
.replace(/'/g, ''');
}
function escapeAttr(value) {
return escapeHtml(value);
}
// ===== Focus trap state =====
let lastFocusedElement = null;
function getFocusableElements(container) {
if (!container) return [];
return Array.prototype.slice.call(container.querySelectorAll(
'a[href], area[href], button:not([disabled]), input:not([disabled]):not([type="hidden"]),' +
' select:not([disabled]), textarea:not([disabled]), [tabindex]:not([tabindex="-1"])'
)).filter(function (el) {
return !!(el.offsetWidth || el.offsetHeight || el.getClientRects().length);
});
}
function trapFocus(e, modal) {
if (e.key !== 'Tab') return;
const focusables = getFocusableElements(modal);
if (!focusables.length) {
e.preventDefault();
return;
}
const first = focusables[0];
const last = focusables[focusables.length - 1];
if (e.shiftKey && document.activeElement === first) {
e.preventDefault();
last.focus();
} else if (!e.shiftKey && document.activeElement === last) {
e.preventDefault();
first.focus();
}
}
// ===== Modal helper =====
function buildModal() {
let modal = document.getElementById('aksrt-dl-modal');
if (modal) return modal;
modal = document.createElement('div');
modal.id = 'aksrt-dl-modal';
modal.className = 'aksrt-dl-modal';
modal.setAttribute('role', 'dialog');
modal.setAttribute('aria-modal', 'true');
modal.setAttribute('aria-hidden', 'true');
modal.setAttribute('aria-labelledby', 'aksrt-dl-modal-title');
modal.innerHTML =
'' +
'';
document.body.appendChild(modal);
modal.addEventListener('click', function (e) {
if (e.target.matches('[data-close]')) close();
});
modal.addEventListener('keydown', function (e) {
if (e.key === 'Escape' && modal.classList.contains('is-open')) {
e.preventDefault();
close();
} else if (e.key === 'Tab' && modal.classList.contains('is-open')) {
trapFocus(e, modal);
}
});
return modal;
}
function open(html, returnFocusEl) {
// 记录调用方按钮以便关闭后回焦
lastFocusedElement = returnFocusEl || document.activeElement;
const modal = buildModal();
const body = modal.querySelector('[data-body]');
// 给标题加 id，与 aria-labelledby 联动
body.innerHTML = html.replace(/aksrt-dl-modal__title/, 'aksrt-dl-modal__title" id="aksrt-dl-modal-title');
modal.classList.add('is-open');
modal.setAttribute('aria-hidden', 'false');
document.body.classList.add('aksrt-dl-modal-open');
// 进入后将焦点放在第一个可聚焦元素，否则放 panel
setTimeout(function () {
const focusables = getFocusableElements(modal);
if (focusables.length) {
focusables[0].focus();
} else {
modal.querySelector('.aksrt-dl-modal__panel').focus();
}
}, 0);
}
function close() {
const modal = document.getElementById('aksrt-dl-modal');
if (!modal) return;
modal.classList.remove('is-open');
modal.setAttribute('aria-hidden', 'true');
document.body.classList.remove('aksrt-dl-modal-open');
// 焦点回到触发按钮
if (lastFocusedElement && typeof lastFocusedElement.focus === 'function') {
try { lastFocusedElement.focus(); } catch (_) { /* ignore */ }
}
lastFocusedElement = null;
}
// ===== 错误提示渲染 =====
function renderError(msg, data, returnFocusEl, code) {
let title = tt('failed', '下载失败');
let extra = '';
if (code === 'aksrt_need_login' && data && data.login_url) {
title = tt('need_login', '请先登录');
msg = tt('login_hint', '登录后即可继续下载，访客不可使用此资源。');
extra = '' + tt('go_login', '前往登录') + '';
} else if (code === 'aksrt_credits_insufficient') {
title = tt('credit_low', '积分不够');
const balance = typeof (data && data.balance) === 'number' ? data.balance : 0;
const cost = typeof (data && data.cost) === 'number' ? data.cost : 0;
msg = tt('credit_hint',
'当前余额 ' + balance + ' 积分，需要 ' + cost + ' 积分。可通过签到、阅读、邀请好友等方式获取积分。'
);
} else if (data && data.login_url) {
extra = '' + tt('go_login', '前往登录') + '';
}
open(
'' + title + '
' +
'' + (msg || '') + '
' +
(extra ? '' + extra + '
' : ''),
returnFocusEl
);
}
// ===== 成功渲染 =====
function renderSuccess(payload, returnFocusEl) {
const code = String(payload.extract_code || '').trim();
const has = !!payload.has_extract || code !== '';
const safeCode = escapeHtml(code);
const safeCodeAttr = escapeAttr(code);
const dlUrl = escapeAttr(payload.dl_url || '#');
const extractHtml = code !== ''
? '' + tt('extract', '提取码') + '' + safeCode + '
'
: (has ? '' + tt('extract_missing', '下载源标记了提取码，但接口未返回具体内容，请检查资源下载源的 extract_code 字段。') + '
' : '');
open(
'' + tt('ready', '下载已就绪') + '
' +
(extractHtml || '' + tt('hint', '点击下方按钮开始下载，链接 10 分钟内有效。') + '
') +
'' +
'
' + tt('go', '立即下载') + '' +
(typeof payload.balance === 'number' ? '
' + tt('balance', '余额：') + payload.balance + '' : '') +
'