/**

* 通用工具函数

*/

import { RUNTIME_CACHE_KEY, SUSFS_COMPAT_MIN } from './config.js';

// HTML 转义，防止 XSS

export function esc(str) {

var el = document.createElement('span');

el.textContent = str;

return el.innerHTML;

}

// 复制文本到剪贴板（兼容旧浏览器）

export function copyText(text) {

if (navigator.clipboard && navigator.clipboard.writeText) {

return navigator.clipboard.writeText(text);

}

var ta = document.createElement('textarea');

ta.value = text;

ta.style.position = 'fixed';

ta.style.opacity = '0';

document.body.appendChild(ta);

ta.select();

document.execCommand('copy');

document.body.removeChild(ta);

return Promise.resolve();

}

// 给 URL 追加缓存破坏参数

export function withCacheKey(url) {

return url + (url.indexOf('?') === -1 ? '?' : '&') + 'v=' + encodeURIComponent(RUNTIME_CACHE_KEY);

}

// 强制无缓存请求 JSON

export async function fetchJsonFresh(url) {

var r = await fetch(withCacheKey(url), { cache: 'no-store' });

if (!r.ok) throw new Error('HTTP ' + r.status);

return r.json();

}

// 判断内核版本是否兼容 SUSFS

export function isSusfsCompat(kernelStr) {

var parts = kernelStr.split('.');

var major = parts[0] + '.' + parts[1];

var min = SUSFS_COMPAT_MIN[major];

if (min == null) return false;

var sublevel = parseInt(parts[2], 10);

return sublevel >= min;

}