`; const blob = new Blob([fullHtml], { type: 'text/html;charset=utf-8;' }); const url = URL.createObjectURL(blob); const downloadAnchor = document.createElement('a'); downloadAnchor.href = url; downloadAnchor.download = `${(state.title || 'timetable').toLowerCase().replace(/\s+/g, '_')}.html`; document.body.appendChild(downloadAnchor); downloadAnchor.click(); downloadAnchor.remove(); }function handleDownloadPNG() { const htmlString = new XMLSerializer().serializeToString(document.getElementById('utc-printable-area')); const svgString = ``; const blob = new Blob([svgString], { type: 'image/svg+xml;charset=utf-8' }); const URL = window.URL || window.webkitURL || window; const blobURL = URL.createObjectURL(blob); const image = new Image(); image.onload = () => { const canvas = document.createElement('canvas'); canvas.width = 1000; canvas.height = 700; const context = canvas.getContext('2d'); context.fillStyle = '#ffffff'; context.fillRect(0, 0, canvas.width, canvas.height); context.drawImage(image, 0, 0); const png = canvas.toDataURL('image/png'); const downloadAnchor = document.createElement('a'); downloadAnchor.href = png; downloadAnchor.download = `${(state.title || 'timetable').toLowerCase().replace(/\s+/g, '_')}.png`; document.body.appendChild(downloadAnchor); downloadAnchor.click(); downloadAnchor.remove(); }; image.src = blobURL; }function handleDownloadSVG() { const htmlString = new XMLSerializer().serializeToString(document.getElementById('utc-printable-area')); const svgString = ``; const blob = new Blob([svgString], { type: 'image/svg+xml;charset=utf-8' }); const url = URL.createObjectURL(blob); const downloadAnchor = document.createElement('a'); downloadAnchor.href = url; downloadAnchor.download = `${(state.title || 'timetable').toLowerCase().replace(/\s+/g, '_')}.svg`; document.body.appendChild(downloadAnchor); downloadAnchor.click(); downloadAnchor.remove(); }function handleAutoSchedule() { recordHistory(); const mockSubjects = ["Advanced Mathematics", "Computer Science", "Physics Lab", "English Literature", "Data Structures", "Digital Logic", "Operating Systems", "Electronics"]; const mockTeachers = ["Dr. Alan Turing", "Prof. Ada Lovelace", "Dr. Grace Hopper", "Prof. John von Neumann", "Dr. Dennis Ritchie"]; const mockRooms = ["Hall 101", "Lab 203", "Auditorium B", "Room 405", "Lab 3"];state.workingDays.forEach(day => { for (let s = 0; s < state.slotsCount; s++) { const key = `${day}-${s}`; if (!state.entries[key]) { const sub = mockSubjects[Math.floor(Math.random() * mockSubjects.length)]; const tch = mockTeachers[Math.floor(Math.random() * mockTeachers.length)]; const rm = mockRooms[Math.floor(Math.random() * mockRooms.length)]; state.entries[key] = { subject: sub, teacher: tch, room: rm, colorScheme: 'subject', color: 'blue', notes: '' }; } } });saveState(); renderTimetable(); }function handleCopyTimetable() { const textSummary = JSON.stringify(state, null, 2); navigator.clipboard.writeText(textSummary).then(() => { alert('Timetable configuration and JSON copied to clipboard successfully!'); }).catch(() => { alert('Failed to copy to clipboard.'); }); }function handleUndo() { if (undoStack.length === 0) return; redoStack.push(JSON.stringify(state.entries)); const prev = undoStack.pop(); state.entries = JSON.parse(prev); saveState(); renderTimetable(); updateHistoryButtons(); }function handleRedo() { if (redoStack.length === 0) return; undoStack.push(JSON.stringify(state.entries)); const next = redoStack.pop(); state.entries = JSON.parse(next); saveState(); renderTimetable(); updateHistoryButtons(); }function resetAll() { if (confirm("Are you sure you want to completely reset all settings and entries?")) { localStorage.removeItem('utc_timetable_pro_v8'); undoStack = []; redoStack = []; state.entries = {}; renderTimetable(); updateHistoryButtons(); } }function escapeHtml(str) { return (str || '').replace(/&/g, "&") .replace(//g, ">") .replace(/"/g, """) .replace(/'/g, "'"); }if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', initApp); } else { initApp(); }})();