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// ==UserScript==
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// @name 广谈大湾网 · 今日发帖数
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// @namespace local.dww.today-threads
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// @version 1.0.0
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// @description 在论坛主题管理的主题总数右侧显示北京时间当日新增主题数（不含回复）。
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// @match https://www.dww11.com/admin.php*
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// @match https://dww11.com/admin.php*
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// @run-at document-idle
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// @grant none
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// ==/UserScript==
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(() => {
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'use strict';
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// 不要添加 @noframes：管理列表就在后台的 main iframe 内。
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const params = new URLSearchParams(location.search);
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if (params.get('action') !== 'threads' || params.get('operation')) return;
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const header = [...document.querySelectorAll('#cpform th.partition')]
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.find(el => /^\s*(?:最新主题数|符合条件的主题数)\s*\d+/.test(el.textContent));
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const form = document.querySelector('#threadforum');
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if (!header || !form || document.getElementById('dww-today-threads')) return;
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const badge = document.createElement('span');
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badge.id = 'dww-today-threads';
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badge.style.cssText = 'display:inline-block;margin-left:20px;color:#008640;white-space:nowrap;';
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const label = document.createElement('span');
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label.setAttribute('role', 'status');
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label.setAttribute('aria-live', 'polite');
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label.textContent = '今日发帖数：统计中…';
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const refresh = document.createElement('button');
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refresh.type = 'button';
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refresh.textContent = '刷新';
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refresh.style.cssText = 'margin-left:8px;padding:0;border:0;background:none;color:#2369a0;cursor:pointer;font:inherit;font-weight:normal;';
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badge.append(label, refresh);
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header.append(badge);
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function dayRange(now = new Date()) {
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// 用 UTC 计算固定东八区日期，避免电脑时区及夏令时影响。
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const offset = 8 * 60 * 60 * 1000;
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const localDay = new Date(now.getTime() + offset).toISOString().slice(0, 10);
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const previousDay = new Date(Date.parse(localDay + 'T00:00:00Z') - 86400000)
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.toISOString().slice(0, 10);
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// Discuz 原生查询使用 dateline > starttime 且 <= endtime。
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// 从前一天最后一秒之后开始，完整涵盖今日 00:00:00 至 23:59:59。
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return [localDay, `${previousDay} 23:59:59`, `${localDay} 23:59:59`];
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}
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async function queryCount(start, end) {
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const hash = form.querySelector('input[name="formhash"]')?.value;
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if (!hash) throw new Error('未找到后台查询凭据，请重新登录后刷新');
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// 只提交查询字段，不读取/提交 #cpform 的批量修改、删除字段。
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// 不继承当前筛选条件，今日数始终表示全部可查询版块的新增主题。
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const body = new URLSearchParams({
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formhash: hash, searchsubmit: '1', detail: '1',
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page: '1', pp: '', perpage: '20',
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inforum: 'all', intype: '', insort: 'all',
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starttime: start, endtime: end,
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users: '', keywords: '', viewsmore: '', viewsless: '',
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repliesmore: '', repliesless: '', readpermmore: '',
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pricemore: '', noreplydays: '', savethread: '0', hidethread: '0'
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});
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const endpoint = new URL('admin.php?action=threads', location.href);
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const controller = new AbortController();
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const timer = setTimeout(() => controller.abort(), 25000);
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try {
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const response = await fetch(endpoint.href, {
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method: 'POST', credentials: 'same-origin', cache: 'no-store',
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body, signal: controller.signal
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});
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if (!response.ok) throw new Error(`后台返回 HTTP ${response.status}`);
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const buffer = await response.arrayBuffer();
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const charset = response.headers.get('content-type')?.match(/charset=([^;\s]+)/i)?.[1]
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|| document.characterSet || 'utf-8';
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const html = new TextDecoder(charset).decode(buffer);
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const result = new DOMParser().parseFromString(html, 'text/html');
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const summary = [...result.querySelectorAll('#cpform th.partition')]
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.map(el => el.textContent.match(/^\s*符合条件的主题数\s*([\d,]+)/))
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.find(Boolean);
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if (summary) {
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// 必须是按指定日期查询的结果，避免把默认最新主题数误报成今日数。
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const returnedStart = result.querySelector('#threadforum [name="starttime"]')?.value;
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const returnedEnd = result.querySelector('#threadforum [name="endtime"]')?.value;
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if (returnedStart !== start || returnedEnd !== end) {
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throw new Error('后台未返回指定日期条件，无法确认统计结果');
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}
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return Number(summary[1].replaceAll(',', ''));
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}
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throw new Error('未读取到统计结果，可能登录已过期或后台查询异常');
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} finally {
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clearTimeout(timer);
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}
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}
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let busy = false;
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let lastDay = '';
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async function update() {
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if (busy) return;
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busy = true;
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refresh.disabled = true;
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const [day, start, end] = dayRange();
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label.textContent = '今日发帖数：统计中…';
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badge.style.color = '#008640';
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try {
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const count = await queryCount(start, end);
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if (dayRange()[0] !== day) {
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// 请求恰好跨过午夜，不把昨日结果标为今日。
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label.textContent = '今日发帖数：请刷新';
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lastDay = '';
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return;
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}
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lastDay = day;
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label.textContent = `今日发帖数：${count}`;
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badge.title = `北京时间 ${day} 新增主题，不含回复；以后台正常主题查询口径为准。更新于 ${new Date().toLocaleTimeString('zh-CN', { timeZone: 'Asia/Shanghai', hour12: false })}`;
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} catch (error) {
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label.textContent = '今日发帖数：读取失败';
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badge.style.color = '#c0392b';
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badge.title = error.name === 'AbortError' ? '查询超时，请点击刷新重试' : error.message;
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} finally {
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busy = false;
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refresh.disabled = false;
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}
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}
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refresh.addEventListener('click', update);
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// 每分钟一条后台只读查询；后台标签页暂停轮询。
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setInterval(() => { if (!document.hidden) update(); }, 60000);
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document.addEventListener('visibilitychange', () => {
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if (!document.hidden && lastDay !== dayRange()[0]) update();
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});
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update();
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})();
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