// ==UserScript== // @name Vedantu Live Transcription Generator // @namespace tweeks.io // @version 1.0.0 // @description Adds a live speech-to-text transcription panel to Vedantu live sessions and captures visible chat messages into the transcript. // @author Tweeks // @match https://session.vedantu.com/session/*/live* // @grant GM_registerMenuCommand // @grant TW_notifications // ==/UserScript== (function () { 'use strict'; const CHAT_MESSAGE_SELECTOR = '[data-testid="messsage-text"]'; const CHAT_CONTAINER_SELECTOR = '.student-chat-holder, .student-right-pane, #student-container'; const SpeechRecognition = window.SpeechRecognition || window.webkitSpeechRecognition; let recognition = null; let listening = false; let lastFinal = ''; const seenChat = new WeakSet(); const transcript = []; function injectCss() { if (document.getElementById('tm-vlt-style')) return; const style = document.createElement('style'); style.id = 'tm-vlt-style'; style.textContent = ` #tm-vlt-panel{position:fixed;right:16px;bottom:16px;width:min(420px,calc(100vw - 32px));max-height:min(520px,70vh);background:#fff;color:#202124;border:1px solid rgba(0,0,0,.16);border-radius:12px;box-shadow:0 8px 28px rgba(0,0,0,.22);font:13px/1.45 Arial,sans-serif;z-index:999999;display:flex;flex-direction:column;overflow:hidden} #tm-vlt-panel.tm-vlt-min{max-height:none;width:270px} #tm-vlt-panel.tm-vlt-min .tm-vlt-body{display:none} .tm-vlt-head{display:flex;align-items:center;gap:8px;padding:10px 12px;background:#111827;color:#fff;cursor:move;user-select:none}.tm-vlt-title{font-weight:700;flex:1}.tm-vlt-status{font-size:11px;opacity:.85}.tm-vlt-btn{border:0;border-radius:7px;padding:6px 9px;background:#2563eb;color:#fff;cursor:pointer;font-size:12px}.tm-vlt-btn.secondary{background:#4b5563}.tm-vlt-btn.danger{background:#dc2626}.tm-vlt-body{display:flex;flex-direction:column;min-height:220px}.tm-vlt-controls{display:flex;gap:6px;flex-wrap:wrap;padding:8px;border-bottom:1px solid #eee}.tm-vlt-output{padding:10px;overflow:auto;white-space:pre-wrap;min-height:180px;max-height:380px}.tm-vlt-line{margin:0 0 8px}.tm-vlt-line b{color:#1d4ed8}.tm-vlt-interim{color:#6b7280;font-style:italic;border-top:1px dashed #ddd;padding:8px 10px;min-height:18px}.tm-vlt-note{font-size:11px;color:#6b7280;padding:0 10px 10px}`; document.head.appendChild(style); } function panel() { let p = document.getElementById('tm-vlt-panel'); if (p) return p; injectCss(); p = document.createElement('div'); p.id = 'tm-vlt-panel'; p.innerHTML = `

Vedantu Live Transcriptidle

Uses your browser microphone Speech Recognition when available. Chat messages are added automatically.

`; document.body.appendChild(p); p.addEventListener('click', handleClick); makeDraggable(p, p.querySelector('.tm-vlt-head')); render(); return p; } function setStatus(s) { const el = panel().querySelector('.tm-vlt-status'); if (el) el.textContent = s; } function addLine(source, text) { text = (text || '').replace(/\s+/g, ' ').trim(); if (!text) return; transcript.push({ time: new Date(), source, text }); render(); } function render() { const out = panel().querySelector('.tm-vlt-output'); out.innerHTML = transcript.map(x => `

[${x.time.toLocaleTimeString()} ${escapeHtml(x.source)}] ${escapeHtml(x.text)}

`).join(''); out.scrollTop = out.scrollHeight; } function escapeHtml(s) { return String(s).replace(/[&<>"]/g, c => ({'&':'&','<':'<','>':'>','"':'"'}[c])); } function fullText() { return transcript.map(x => `[${x.time.toLocaleString()} ${x.source}] ${x.text}`).join('\n'); } async function handleClick(e) { const act = e.target && e.target.dataset && e.target.dataset.act; if (!act) return; if (act === 'start') startRecognition(); if (act === 'stop') stopRecognition(); if (act === 'clear') { transcript.length = 0; render(); } if (act === 'min') panel().classList.toggle('tm-vlt-min'); if (act === 'copy') { await navigator.clipboard.writeText(fullText()); await TW_toast('Transcript copied', 'success'); } if (act === 'download') downloadTranscript(); } function startRecognition() { panel(); if (!SpeechRecognition) { setStatus('unsupported'); addLine('System', 'Speech recognition is not supported in this browser. Try Chrome or Edge.'); return; } if (listening) return; recognition = recognition || new SpeechRecognition(); recognition.continuous = true; recognition.interimResults = true; recognition.lang = localStorage.getItem('tm-vlt-lang') || 'en-IN'; recognition.onstart = () => { listening = true; setStatus('listening'); }; recognition.onerror = ev => { setStatus('error: ' + ev.error); }; recognition.onend = () => { listening = false; setStatus('stopped'); }; recognition.onresult = ev => { let interim = ''; for (let i = ev.resultIndex; i < ev.results.length; i++) { const text = ev.results[i][0].transcript; if (ev.results[i].isFinal) { if (text.trim() !== lastFinal) { lastFinal = text.trim(); addLine('Mic', text); } } else interim += text; } panel().querySelector('.tm-vlt-interim').textContent = interim; }; try { recognition.start(); } catch (_) {} } function stopRecognition() { if (recognition) recognition.stop(); } function downloadTranscript() { const blob = new Blob([fullText()], { type: 'text/plain' }); const a = document.createElement('a'); a.href = URL.createObjectURL(blob); a.download = 'vedantu-transcript.txt'; a.click(); URL.revokeObjectURL(a.href); } function scanChat() { document.querySelectorAll(CHAT_MESSAGE_SELECTOR).forEach(el => { if (!seenChat.has(el)) { seenChat.add(el); addLine('Chat', el.textContent); } }); } function observeChat() { scanChat(); const root = document.querySelector(CHAT_CONTAINER_SELECTOR); if (!root) return setTimeout(observeChat, 1000); const mo = new MutationObserver(() => scanChat()); mo.observe(root, { childList: true, subtree: true, characterData: true }); } function makeDraggable(box, handle) { let sx, sy, sr, sb, dragging = false; handle.addEventListener('mousedown', e => { if (e.target.tagName === 'BUTTON') return; dragging = true; sx = e.clientX; sy = e.clientY; sr = parseFloat(getComputedStyle(box).right); sb = parseFloat(getComputedStyle(box).bottom); e.preventDefault(); }); window.addEventListener('mousemove', e => { if (!dragging) return; box.style.right = Math.max(0, sr - (e.clientX - sx)) + 'px'; box.style.bottom = Math.max(0, sb - (e.clientY - sy)) + 'px'; }); window.addEventListener('mouseup', () => dragging = false); } GM_registerMenuCommand('Show Vedantu transcript panel', panel); GM_registerMenuCommand('Start Vedantu live transcription', startRecognition); panel(); observeChat(); })();