92 lines
4.7 KiB
JavaScript
92 lines
4.7 KiB
JavaScript
const form = document.querySelector('#search-form');
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const keyword = document.querySelector('#keyword');
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const notice = document.querySelector('#notice');
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const results = document.querySelector('#results');
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const modeNote = document.querySelector('#mode-note');
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const localDownloads = document.querySelector('#local-downloads');
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const lyricCache = new Map();
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function text(value) { return document.createTextNode(value ?? ''); }
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function safeName(value) { return (value || 'unknown').replace(/[\\/:*?"<>|\u0000-\u001f]/g, '_').trim().slice(0, 180) || 'unknown'; }
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function duration(seconds) { const n = Number(seconds || 0); return n ? `${Math.floor(n / 60)}:${String(n % 60).padStart(2, '0')}` : ''; }
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function plainText(lrc) { return lrc.split(/\r?\n/).map(line => line.replace(/\[[^\]]*\]/g, '').trim()).filter(Boolean).join('\n'); }
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async function api(path, payload) {
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const response = await fetch(path, { method: 'POST', headers: {'Content-Type': 'application/json'}, body: JSON.stringify(payload) });
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const data = await response.json().catch(() => ({}));
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if (!response.ok) throw new Error(data.error || `请求失败 (${response.status})`);
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return data;
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}
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async function loadInfo() {
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try {
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const response = await fetch('/api/info');
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const info = await response.json();
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if (info.mode === 'local') {
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modeNote.textContent = '本机模式：查询从这台电脑直接发出，不经过 lrc.flechazo.xin。';
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} else {
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modeNote.textContent = '网页模式：查询由本站后端转发，但不会写入数据库或日志正文。下载文件在浏览器中生成。';
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localDownloads.hidden = false;
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}
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} catch {
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modeNote.textContent = '无法确认运行模式，请刷新页面重试。';
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}
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}
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function download(name, body, type = 'text/plain;charset=utf-8') {
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const url = URL.createObjectURL(new Blob([body], {type}));
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const anchor = document.createElement('a');
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anchor.href = url; anchor.download = name; anchor.hidden = true;
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document.body.append(anchor); anchor.click(); anchor.remove();
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setTimeout(() => URL.revokeObjectURL(url), 1500);
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}
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async function fetchAndSave(song, kind, button) {
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button.disabled = true;
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notice.className = 'notice'; notice.textContent = `正在读取《${song.name}》…`;
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try {
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if (!lyricCache.has(song.mid)) lyricCache.set(song.mid, api('/api/lyrics', {mid: song.mid}));
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const data = await lyricCache.get(song.mid).catch(error => { lyricCache.delete(song.mid); throw error; });
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const base = safeName(`${song.name} - ${song.singer}`);
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if (kind === 'lrc') download(`${base}.lrc`, data.lyric);
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if (kind === 'txt') download(`${base}.txt`, plainText(data.lyric));
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if (kind === 'trans') {
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if (!data.trans) throw new Error('这首歌没有翻译歌词');
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download(`${base}.trans.lrc`, data.trans);
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}
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notice.textContent = '文件已在浏览器中生成。';
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} catch (error) {
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notice.className = 'notice error'; notice.textContent = error.message;
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} finally { button.disabled = false; }
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}
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function renderSongs(songs) {
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results.replaceChildren();
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songs.forEach((song, index) => {
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const article = document.createElement('article'); article.className = 'song';
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const info = document.createElement('div');
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const title = document.createElement('h2'); title.append(text(`${String(index + 1).padStart(2, '0')} ${song.name}`));
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const meta = document.createElement('div'); meta.className = 'meta';
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meta.append(text([song.singer, song.album ? `《${song.album}》` : '', duration(song.interval)].filter(Boolean).join(' · ')));
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info.append(title, meta);
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const actions = document.createElement('div'); actions.className = 'actions';
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[['lrc','下载 LRC','primary'],['txt','纯文本'],['trans','翻译 LRC']].forEach(([kind,label,klass]) => {
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const button = document.createElement('button'); button.type = 'button'; button.className = klass || ''; button.append(text(label));
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button.addEventListener('click', () => fetchAndSave(song, kind, button)); actions.append(button);
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});
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article.append(info, actions); results.append(article);
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});
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}
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form.addEventListener('submit', async event => {
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event.preventDefault(); const submit = form.querySelector('button'); submit.disabled = true;
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notice.className = 'notice'; notice.textContent = '正在搜索…'; results.replaceChildren(); lyricCache.clear();
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try {
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const data = await api('/api/search', {keyword: keyword.value.trim(), limit: 15});
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renderSongs(data.songs || []); notice.textContent = data.songs?.length ? `找到 ${data.songs.length} 条结果。` : '没有找到相关歌曲。';
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} catch (error) { notice.className = 'notice error'; notice.textContent = error.message; }
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finally { submit.disabled = false; }
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});
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loadInfo();
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