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| // 使用 IIFE 避免全局污染
(function() {
// 标记是否已经获取过 IP 信息（当前会话内只获取一次即可）
let ipInfoLoaded = false;
let cachedHTML = null;
const fetchIpInfo = async () => {
const welcomeInfo = document.querySelector('#welcome-info');
if (!welcomeInfo) return;
// 如果已经加载过，直接恢复缓存的内容
if (ipInfoLoaded && cachedHTML) {
welcomeInfo.innerHTML = cachedHTML;
return;
}
// 显示加载状态
welcomeInfo.innerHTML = '<div class="loading"><i class="fas fa-spinner fa-spin"></i> 定位中...</div>';
// 备用 API 列表（ipinfo.io 在国内可能被拦截，放在后面）
const apis = [
{
url: 'https://api.ip.sb/geoip',
parser: (d) => ({
country: d.country,
region: d.region,
city: d.city,
loc: d.latitude && d.longitude ? `${d.latitude},${d.longitude}` : null
})
},
{
url: 'https://ipapi.co/json/',
parser: (d) => ({
country: d.country_code,
region: d.region,
city: d.city,
loc: d.latitude && d.longitude ? `${d.latitude},${d.longitude}` : null
})
},
{
url: 'https://ipinfo.io/json',
parser: (d) => ({
country: d.country,
region: d.region,
city: d.city,
loc: d.loc
})
}
];
let data = null;
for (const api of apis) {
try {
const controller = new AbortController();
const timeout = setTimeout(() => controller.abort(), 3000);
const res = await fetch(api.url, {
signal: controller.signal,
headers: { 'Accept': 'application/json' }
});
clearTimeout(timeout);
if (res.ok) {
const raw = await res.json();
data = api.parser(raw);
break;
}
} catch (e) {
continue;
}
}
// 渲染内容
if (data) {
const { country, region, city, loc } = data;
const [lat, lng] = loc ? loc.split(',').map(Number) : [];
const myLat = 31.707754;
const myLng = 119.825873;
const dist = (lat && lng) ? calculateDistance(lng, lat, myLng, myLat) : null;
const location = country === "CN" || country === "China"
? `${region || ''} ${city || ''}`.trim()
: (country || '地球');
cachedHTML = `
<div class="welcome-content">
<p>欢迎来自 <span class="location">${location || '神秘星球'}</span> 的道友 💖</p>
${dist ? `<p>距博主约 <span class="distance">${dist}</span> 公里</p>` : ''}
<p class="greeting">${getTimeGreeting()}</p>
</div>
`;
ipInfoLoaded = true;
welcomeInfo.innerHTML = cachedHTML;
} else {
cachedHTML = `
<div class="welcome-content">
<p>🎉 欢迎来到我的博客！</p>
<p class="greeting">${getTimeGreeting()}</p>
</div>
`;
ipInfoLoaded = true;
welcomeInfo.innerHTML = cachedHTML;
}
};
const calculateDistance = (lng1, lat1, lng2, lat2) => {
if (!lat1 || !lng1 || !lat2 || !lng2) return null;
const R = 6371;
const rad = Math.PI / 180;
const dLat = (lat2 - lat1) * rad;
const dLon = (lng2 - lng1) * rad;
const a = Math.sin(dLat/2) ** 2 + Math.cos(lat1 * rad) * Math.cos(lat2 * rad) * Math.sin(dLon/2) ** 2;
return Math.round(R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)));
};
const getTimeGreeting = () => {
const hour = new Date().getHours();
if (hour < 6) return "It's late, pay attention to rest 🌙";
if (hour < 12) return "Good morning, start your day. ☀️";
if (hour < 18) return "Good afternoon. Good work. ☕";
return "Good evening. May you have a good mood. 🌆";
};
// ===== 初始化策略 =====
// 1. 首次加载
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', fetchIpInfo);
} else {
fetchIpInfo();
}
// 2. 安知鱼主题 PJAX 事件（关键）
// 安知鱼使用 pjax:complete，但 footer 不刷新，所以需要手动恢复内容
document.addEventListener('pjax:complete', () => {
// PJAX 完成后，检查 welcome-info 是否存在
setTimeout(() => {
const welcomeInfo = document.querySelector('#welcome-info');
if (welcomeInfo) {
if (cachedHTML && ipInfoLoaded) {
// 已经有缓存，直接恢复
welcomeInfo.innerHTML = cachedHTML;
} else {
// 首次或缓存丢失，重新获取
fetchIpInfo();
}
}
}, 100); // 延迟确保 DOM 已更新
});
// 3. 浏览器前进/后退按钮
window.addEventListener('popstate', () => {
setTimeout(() => {
const welcomeInfo = document.querySelector('#welcome-info');
if (welcomeInfo && cachedHTML && ipInfoLoaded) {
welcomeInfo.innerHTML = cachedHTML;
}
}, 100);
});
})();
|
