Task 61 extract frontend utilities

1 files changed, 21 insertions, 0 deletions

diff --git a/web/js/utils.js b/web/js/utils.js
new file mode 100644
index 0000000..2851211
--- /dev/null
+++ b/web/js/utils.js
@@ -0,0 +1,21 @@
+export function fmtDur(s) {
+  if (!s || s < 0) return '0:00';
+  const h = Math.floor(s / 3600);
+  const m = Math.floor((s % 3600) / 60);
+  const sec = Math.floor(s % 60);
+  const mm = String(m).padStart(2, '0');
+  const ss = String(sec).padStart(2, '0');
+  return h > 0 ? `${h}:${mm}:${ss}` : `${mm}:${ss}`;
+}
+
+export function escapeHtml(s) {
+  return (s ?? '').replace(/[&<>"']/g, (c) => ({ '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' }[c]));
+}
+
+export function toast(msg, type = 'info') {
+  const t = document.getElementById('toast');
+  if (!t) return;
+  t.textContent = msg;
+  t.className = 'toast show ' + type;
+  setTimeout(() => t.classList.remove('show'), 2800);
+}