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<?php
session_start();
require_once 'getv.php'; // 确保 token/authCode 已设置
$category = $_GET['category'] ?? 'Model';
$sort = (int)($_GET['sort'] ?? 0);
$tags = $_GET['tags'] ?? '';
$userId = $_GET['userId'] ?? '';
$sortNames = [0 => '最新', 1 => '热门', 2 => '史上热门'];
$sortLabel = $sortNames[$sort] ?? '最新';
$catNames = ['Model' => '模型', 'Discussion' => '讨论', 'Experiment' => '实验'];
$catLabel = $catNames[$category] ?? $category;
?>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title><?= htmlspecialchars($sortLabel . $catLabel) ?> - Turtle Universe Web</title>
<meta name="referrer" content="no-referrer">
<style>
/* 样式保持不变（与之前相同，为了简洁此处省略，实际使用请复制原样式） */
*{margin:0;padding:0;box-sizing:border-box}
body{background:#f0f2f5;font-family:v-sans,system-ui,sans-serif;color:#333}
.header{position:sticky;top:0;background:white;z-index:10;display:flex;align-items:center;padding:12px 16px;border-bottom:1px solid #e0e0e0}
.header img{height:24px;cursor:pointer}
.header .title{flex:1;font-size:18px;font-weight:600;margin:0 16px;white-space:nowrap}
.header select{padding:6px 12px;border-radius:8px;border:1px solid #ccc;font-size:14px;background:white}
.container{padding:16px}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
@media (min-width:768px){.grid{grid-template-columns:repeat(4,1fr)}}
.card, .skeleton-card{background:white;border-radius:12px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,0.08);cursor:pointer;transition:transform 0.1s}
.card:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,0.12)}
.cover{width:100%;padding-top:60%;background-size:cover;background-position:center;background-color:#e0e0e0}
.skeleton-cover{width:100%;padding-top:60%;background:#e0e0e0;animation:pulse 1.5s infinite}
.info{padding:10px}
.title{font-size:14px;font-weight:500;margin-bottom:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.author{display:flex;align-items:center;gap:8px}
.author img{width:20px;height:20px;border-radius:50%;object-fit:cover}
.skeleton-text{height:14px;background:#e0e0e0;border-radius:4px;margin-bottom:8px;animation:pulse 1.5s infinite}
.skeleton-author{display:flex;align-items:center;gap:8px}
.skeleton-avatar{width:20px;height:20px;border-radius:50%;background:#e0e0e0;animation:pulse 1.5s infinite}
.skeleton-name{width:80px;height:12px;background:#e0e0e0;border-radius:4px;animation:pulse 1.5s infinite}
@keyframes pulse{0%{opacity:0.6}50%{opacity:1}100%{opacity:0.6}}
.load-trigger{height:20px;margin:20px 0;text-align:center}
.load-trigger .loading-spinner{display:inline-block;width:24px;height:24px;border:2px solid #ccc;border-top-color:#2080f0;border-radius:50%;animation:spin 0.8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.empty{text-align:center;padding:60px 0;color:#999}
.error{text-align:center;padding:60px 0;color:#e74c3c}
.retry-btn{padding:8px 24px;background:#2080f0;color:white;border:none;border-radius:20px;cursor:pointer;margin-top:12px}
.cache-toast{position:fixed;top:70px;left:16px;right:16px;background:#fff9e6;border-left:4px solid #ff9800;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1);padding:12px 16px;display:flex;align-items:center;justify-content:space-between;z-index:1000;backdrop-filter:blur(4px)}
.cache-toast span{font-size:14px;color:#5d4a00}
.cache-toast button{margin-left:12px;background:#ff9800;border:none;padding:4px 12px;border-radius:20px;color:white;cursor:pointer;font-size:12px}
.cache-toast button:last-child{background:#ccc;color:#333}
.cache-toast button:hover{opacity:0.8}
</style>
</head>
<body>
<div class="header">
<img src="imgs/return.png" onclick="history.back()" alt="返回">
<div class="title"><?= htmlspecialchars($sortLabel . $catLabel) ?></div>
<select id="sortSelect" onchange="changeSort()">
<option value="0" <?= $sort==0?'selected':'' ?>>最新作品</option>
<option value="1" <?= $sort==1?'selected':'' ?>>热门作品</option>
<option value="2" <?= $sort==2?'selected':'' ?>>史上热门作品</option>
</select>
</div>
<div class="container">
<div class="grid" id="cardGrid"></div>
<div id="loadTrigger" class="load-trigger" style="display: none;">
<div class="loading-spinner"></div>
</div>
<div id="statusMsg" style="display: none;"></div>
</div>
<script>
// ---------- 配置 ----------
const TAKE = 20;
const DEFAULT_THUMB = 'data:image/svg+xml;base64,' + btoa('<svg xmlns="http://www.w3.org/2000/svg" width="400" height="240" viewBox="0 0 400 240"><rect width="400" height="240" fill="#f0f0f0"/><rect x="100" y="60" width="200" height="120" rx="10" fill="#d0d0d0"/></svg>');
const DEFAULT_AVATAR = 'data:image/svg+xml;base64,' + btoa('<svg xmlns="http://www.w3.org/2000/svg" width="80" height="80" viewBox="0 0 80 80"><circle cx="40" cy="40" r="40" fill="#f0f0f0"/><circle cx="40" cy="30" r="12" fill="#d0d0d0"/><path d="M25 56 Q40 48 55 56 Z" fill="#d0d0d0"/></svg>');
let currentSkip = <?= json_encode((int)($_GET['skip'] ?? 0)) ?>;
let lastId = null;
let isLoading = false;
let hasMore = true;
let observer = null;
let cacheEnabled = false;
let cacheKey = location.pathname + location.search;
let allItems = []; // 存储所有已加载的原始数据（用于缓存）
// ---------- 缓存权限管理 ----------
function initCachePermission() {
const saved = localStorage.getItem('cache_permission');
if (saved === 'true') {
cacheEnabled = true;
return true;
} else if (saved === 'false') {
cacheEnabled = false;
return false;
} else {
showCachePrompt();
return false;
}
}
function showCachePrompt() {
const toast = document.createElement('div');
toast.className = 'cache-toast';
toast.innerHTML = `
<span>🔐 允许使用 sessionStorage 缓存数据，可提升下次访问速度？</span>
<div>
<button id="cacheAllow">允许</button>
<button id="cacheDeny">拒绝</button>
</div>
`;
document.body.appendChild(toast);
document.getElementById('cacheAllow').onclick = () => {
localStorage.setItem('cache_permission', 'true');
cacheEnabled = true;
toast.remove();
// 如果已有数据，立即缓存
if (allItems.length) {
saveToCache();
}
};
document.getElementById('cacheDeny').onclick = () => {
localStorage.setItem('cache_permission', 'false');
cacheEnabled = false;
toast.remove();
};
}
// 保存当前所有数据到缓存
function saveToCache() {
if (!cacheEnabled) return;
const cacheData = {
items: allItems, // 全部原始数据
nextSkip: currentSkip,
lastId: lastId,
hasMore: hasMore
};
sessionStorage.setItem(cacheKey, JSON.stringify(cacheData));
}
// 从缓存恢复
function tryLoadFromCache() {
if (!cacheEnabled) return false;
const cached = sessionStorage.getItem(cacheKey);
if (!cached) return false;
try {
const data = JSON.parse(cached);
if (data.items && Array.isArray(data.items) && data.items.length) {
allItems = data.items;
currentSkip = data.nextSkip;
lastId = data.lastId;
hasMore = data.hasMore;
// 渲染全部卡片
const grid = document.getElementById('cardGrid');
grid.innerHTML = allItems.map(buildCard).join('');
if (hasMore) {
document.getElementById('loadTrigger').style.display = 'block';
initInfiniteScroll();
} else {
document.getElementById('loadTrigger').style.display = 'none';
}
document.getElementById('statusMsg').style.display = 'none';
return true;
}
} catch(e) {}
return false;
}
// ---------- 辅助函数 ----------
function escHtml(str) {
return String(str).replace(/[&<>"']/g, m => ({'&':'&','<':'<','>':'>','"':'"',"'":'''})[m]);
}
function buildCard(exp) {
const id = exp.ID;
const category = exp.Category;
const title = exp.LocalizedSubject?.Chinese || exp.Subject || '未命名';
const nick = exp.User?.Nickname || '匿名';
let coverUrl = DEFAULT_THUMB;
if (id && (exp.Image >= 0)) {
const [p1,p2,p3,p4] = [id.substring(0,4), id.substring(4,6), id.substring(6,8), id.substring(8,24)];
coverUrl = `https://netlogo-cn.oss-cn-hongkong.aliyuncs.com/experiments/images/${p1}/${p2}/${p3}/${p4}/${exp.Image}.jpg!full`;
}
let avatarUrl = DEFAULT_AVATAR;
if (exp.User?.ID && exp.User?.Avatar) {
const uid = exp.User.ID;
const [a1,a2,a3,a4] = [uid.substring(0,4), uid.substring(4,6), uid.substring(6,8), uid.substring(8,24)];
avatarUrl = `https://netlogo-cn.oss-cn-hongkong.aliyuncs.com/users/avatars/${a1}/${a2}/${a3}/${a4}/${exp.User.Avatar}.jpg!full`;
}
return `
<div class="card" data-id="${id}" onclick="location.href='med.php?id=${id}&category=${category}'">
<div class="cover" style="background-image:url('${coverUrl}')"></div>
<div class="info">
<div class="title">${escHtml(title)}</div>
<div class="author">
<img src="${avatarUrl}" loading="lazy" onerror="this.onerror=null;this.src='${DEFAULT_AVATAR}';">
<span>${escHtml(nick)}</span>
</div>
</div>
</div>`;
}
function renderSkeleton(count) {
let html = '';
for (let i = 0; i < count; i++) {
html += `
<div class="skeleton-card">
<div class="skeleton-cover"></div>
<div class="info">
<div class="skeleton-text" style="width: 80%"></div>
<div class="skeleton-author">
<div class="skeleton-avatar"></div>
<div class="skeleton-name"></div>
</div>
</div>
</div>`;
}
document.getElementById('cardGrid').innerHTML = html;
}
function clearSkeleton() {
const grid = document.getElementById('cardGrid');
if (grid.children.length && grid.children[0].classList.contains('skeleton-card')) {
grid.innerHTML = '';
}
}
async function loadData(append = false) {
if (isLoading) return;
if (!append) {
renderSkeleton(TAKE);
} else {
if (!hasMore) return;
document.getElementById('loadTrigger').style.display = 'block';
}
isLoading = true;
const params = new URLSearchParams(location.search);
params.set('skip', currentSkip);
if (append && lastId) {
params.set('from', lastId);
} else {
params.delete('from');
}
params.set('take', TAKE);
try {
const res = await fetch('/api/query.php?' + params.toString(), { credentials: 'include' });
const isJson = (res.headers.get('content-type') || '').includes('application/json');
let json;
if (isJson) {
json = await res.json();
} else {
const text = await res.text();
throw new Error(`非 JSON 响应 (${res.status}): ${text.substring(0, 100)}`);
}
if (!res.ok) throw new Error(json.error || `HTTP ${res.status}`);
const items = json.Data;
if (!Array.isArray(items)) throw new Error('Data 不是数组');
const grid = document.getElementById('cardGrid');
const statusDiv = document.getElementById('statusMsg');
const loadTrigger = document.getElementById('loadTrigger');
if (!append) {
clearSkeleton();
grid.innerHTML = '';
allItems = []; // 重置缓存数组
}
if (items.length === 0 && !append) {
statusDiv.style.display = 'block';
statusDiv.innerHTML = '<div class="empty">暂无作品</div>';
loadTrigger.style.display = 'none';
hasMore = false;
return;
}
statusDiv.style.display = 'none';
grid.insertAdjacentHTML('beforeend', items.map(buildCard).join(''));
// 合并到 allItems
allItems.push(...items);
if (items.length > 0) {
lastId = items[items.length - 1].ID;
}
currentSkip += items.length;
if (items.length < TAKE) {
hasMore = false;
loadTrigger.style.display = 'none';
} else {
hasMore = true;
loadTrigger.style.display = 'block';
}
// 每次加载后更新缓存（如果允许）
if (cacheEnabled) {
saveToCache();
}
} catch (err) {
console.error(err);
const statusDiv = document.getElementById('statusMsg');
statusDiv.style.display = 'block';
statusDiv.innerHTML = `<div class="error">加载失败：${err.message}<br><button class="retry-btn" onclick="location.reload()">重试</button></div>`;
document.getElementById('loadTrigger').style.display = 'none';
} finally {
isLoading = false;
if (append) {
document.getElementById('loadTrigger').style.display = hasMore ? 'block' : 'none';
}
}
}
function initInfiniteScroll() {
const trigger = document.getElementById('loadTrigger');
if (!trigger) return;
observer = new IntersectionObserver((entries) => {
if (entries[0].isIntersecting && hasMore && !isLoading) {
loadData(true);
}
}, { threshold: 0.1, rootMargin: '0px 0px 200px 0px' });
observer.observe(trigger);
}
function changeSort() {
const url = new URL(location.href);
url.searchParams.set('sort', document.getElementById('sortSelect').value);
url.searchParams.set('skip', 0);
location.href = url.toString();
}
// ---------- 初始化 ----------
(function init() {
const cacheAllowed = initCachePermission();
if (cacheAllowed) {
if (tryLoadFromCache()) {
return; // 成功从缓存恢复
}
}
loadData(false).then(() => {
if (hasMore) initInfiniteScroll();
});
})();
</script>
</body>
</html>