69 lines
6.8 KiB
JavaScript
69 lines
6.8 KiB
JavaScript
// Shared state
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const st = { tailLoading: false, atBottom: true, current: '#', earliest: null, sse: null, channels: [] };
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function colorFor(nick){ let h=0; for(let i=0;i<nick.length;i++){ h=(h*31+nick.charCodeAt(i))>>>0 } return 'hsl('+(h%360)+',60%,'+(window.matchMedia('(prefers-color-scheme: dark)').matches? '70%':'35%')+')'; }
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function escapeHtml(s){ return s.replace(/[&<>"]/g, c=>({'&':'&','<':'<','>':'>','"':'"'}[c])); }
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function linkify(t){ return t.replace(/https?:\/\/\S+/g, function(u){ return '<a href="' + u + '" target="_blank" rel="noopener">' + u + '</a>'; }); }
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function lineHTML(m){ const ts = '<span class=ts>[' + m.time + ']</span>'; const nick = '<b style="color:' + colorFor(m.author) + '">' + m.author + '</b>'; const body = escapeHtml(m.body); return ts + ' ' + nick + ': ' + linkify(body); }
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async function api(path, params){
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const url = new URL(path, window.location.origin);
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if(params && params.query){ Object.entries(params.query).forEach(([k,v])=>url.searchParams.set(k,v)); }
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const res = await fetch(url);
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if(!res.ok) throw new Error('HTTP '+res.status);
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const ct = res.headers.get('content-type')||'';
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if(ct.includes('application/json')) return res.json();
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return res.text();
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}
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function appendBatch(arr){ const el=document.getElementById('tail'); const frag=document.createDocumentFragment(); arr.forEach(m=>{ const div=document.createElement('div'); div.className='msg'; div.innerHTML=lineHTML(m); frag.appendChild(div); processLinks(div); }); el.appendChild(frag); if(st.atBottom){ el.scrollTop = el.scrollHeight; } }
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function prependBatch(arr){ const el=document.getElementById('tail'); const oldTop=el.firstChild; const frag=document.createDocumentFragment(); arr.forEach(m=>{ const div=document.createElement('div'); div.className='msg'; div.innerHTML=lineHTML(m); frag.appendChild(div); processLinks(div); }); el.insertBefore(frag, el.firstChild); if(oldTop){ oldTop.scrollIntoView(); } }
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function processLinks(scope){ const links = scope.querySelectorAll('a[href]:not([data-card])'); links.forEach(a=>{ a.setAttribute('data-card','1');
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// Fetch and render card
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fetch('/api/linkcard?url='+encodeURIComponent(a.href)).then(r=>r.json()).then(card=>{
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if(!card) return;
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if(card.title||card.description||card.image){
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const c=document.createElement('div'); c.className='card'; var html='';
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if(card.image){ html += '<div><img src="'+card.image+'" alt="" style="max-width:160px;max-height:120px;object-fit:cover;border-radius:.25rem"></div>'; }
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html += '<div style="flex:1;margin-left:.5rem">';
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if(card.title){ html += '<div style="font-weight:600">'+escapeHtml(card.title)+'</div>'; }
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if(card.description){ html += '<div style="opacity:.8">'+escapeHtml(card.description)+'</div>'; }
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html += '</div>';
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const row = document.createElement('div'); row.style.display='flex'; row.style.alignItems='flex-start'; row.style.gap='.5rem'; row.innerHTML = html;
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c.appendChild(row);
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// Summary control row
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const ctrl = document.createElement('div'); ctrl.style.marginTop='.25rem';
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const btn = document.createElement('button'); btn.type='button'; btn.title='Summarize this link'; btn.textContent='\u25B6'; btn.style.padding='0 .4rem'; btn.style.fontSize='.9rem';
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const spinner = document.createElement('span'); spinner.textContent=''; spinner.style.marginLeft='.5rem';
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const sum = document.createElement('div'); sum.className='link-summary'; sum.style.whiteSpace='pre-wrap'; sum.style.marginTop='.25rem';
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btn.onclick = async ()=>{
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btn.disabled=true; spinner.textContent='…'; sum.textContent='';
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try{ const data = await api('/api/linksummary',{query:{url:a.href}}); sum.textContent = (data && data.summary) ? data.summary : '(no summary)'; }
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catch(e){ sum.textContent = 'error: '+e; }
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spinner.textContent=''; btn.disabled=false;
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};
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ctrl.appendChild(btn); ctrl.appendChild(spinner);
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c.appendChild(ctrl);
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c.appendChild(sum);
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a.parentNode.insertBefore(c, a.nextSibling);
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}
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}).catch(()=>{});
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}); }
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async function loadChannels(){ try{ const data = await api('/api/channels'); st.channels = data; renderChannels(); if(data.length>0){ selectChannel(data[0]); } } catch(e){} }
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function renderChannels(){ const list=document.getElementById('chanlist'); if(!list) return; list.innerHTML=''; st.channels.forEach(c=>{ const a=document.createElement('a'); a.href='#'; a.textContent=c; a.onclick=(ev)=>{ev.preventDefault(); selectChannel(c)}; if(c===st.current) a.className='active'; list.appendChild(a); }); }
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async function selectChannel(ch){ if(st.sse){ st.sse.close(); st.sse=null; } st.current=ch; renderChannels(); const el=document.getElementById('tail'); if(!el) return; el.textContent=''; const data = await api('/api/tail',{query:{channel:ch,limit:50}}); appendBatch(data); el.scrollTop = el.scrollHeight; st.atBottom=true; st.earliest = data.length? data[0].time : null; startStream(); initScrollHandlers(); }
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function initScrollHandlers(){ const el=document.getElementById('tail'); if(!el) return; el.onscroll=async ()=>{ st.atBottom = (el.scrollTop + el.clientHeight + 8) >= el.scrollHeight; if(el.scrollTop === 0 && st.earliest){ try{ const older = await api('/api/history',{query:{channel:st.current,before:st.earliest,limit:50}}); if(older.length){ const hBefore = el.scrollHeight; prependBatch(older); st.earliest = older[0].time; const hAfter = el.scrollHeight; el.scrollTop = hAfter - hBefore; } } catch(e){} } } }
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function startStream(){ const el=document.getElementById('tail'); if(!el) return; const url=new URL('/api/stream', window.location.origin); url.searchParams.set('channel', st.current); const es=new EventSource(url); st.sse=es; es.onmessage=(ev)=>{ try{ const m=JSON.parse(ev.data); appendBatch([m]); }catch(e){} }; es.onerror=()=>{ es.close(); st.sse=null; setTimeout(startStream, 3000); } }
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async function summarize(){ const ch=document.getElementById('channel'); const win=document.getElementById('window'); const push=document.getElementById('push'); const btn=document.getElementById('btn'); const out=document.getElementById('out'); if(!ch||!win||!btn||!out) return; btn.disabled=true; out.textContent=''; try{ const data = await api('/api/trigger',{query:{channel:ch.value,window:win.value||'6h',push:push && push.checked? '1':'0'}}); if(typeof data === 'string'){ out.textContent = data; } else { out.textContent = (data.summary||''); } } catch(e){ out.textContent = 'error: '+e; } btn.disabled=false; }
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window.addEventListener('DOMContentLoaded', ()=>{
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if(document.getElementById('chanlist')){ loadChannels(); }
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if(document.getElementById('channel')){
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fetch('/api/channels').then(r=>r.json()).then(arr=>{ const sel=document.getElementById('channel'); arr.forEach(c=>{ const o=document.createElement('option'); o.value=c; o.textContent=c; sel.appendChild(o); }); }).catch(()=>{});
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}
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});
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