/** Shared utilities. */

export function formatBytes(bytes) {
  if (bytes < 1024) return bytes + ' B';
  if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB';
  return (bytes / (1024 * 1024)).toFixed(1) + ' MB';
}

export function esc(str) {
  return String(str ?? '')
    .replace(/&/g, '&amp;').replace(/</g, '&lt;')
    .replace(/>/g, '&gt;').replace(/"/g, '&quot;');
}

export function timeLabel(iso) {
  if (!iso) return '';
  const d = new Date(iso);
  if (isNaN(d)) return '';
  const diff = Date.now() - d;
  if (diff < 60_000)     return 'just now';
  if (diff < 3_600_000)  return `${Math.floor(diff / 60_000)}m ago`;
  if (diff < 86_400_000) return d.toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' });
  return d.toLocaleDateString();
}