feat: add getTimeAgoString function

Author: yaroslav8765

adminforth/spa/src/utils/utils.ts

@@ -598,4 +598,22 @@ export function generateMessageHtmlForRecordChange(changedFields: Record<string,
   const listHtml = items ? `<ul class="mt-2 list-disc list-inside">${items}</ul>` : '';
   const messageHtml = `<div>${escapeHtml(t('There are unsaved changes. Are you sure you want to leave this page?'))}${listHtml}</div>`;
   return messageHtml; 
+}
+
+export function getTimeAgoString(date: Date): string {
+  const now = new Date();
+  const diffInSeconds = Math.floor((now.getTime() - date.getTime()) / 1000);
+
+  if (diffInSeconds < 60) {
+    return `${diffInSeconds} ${diffInSeconds === 1 ? 'second' : 'seconds'} ago`;
+  } else if (diffInSeconds < 3600) {
+    const minutes = Math.floor(diffInSeconds / 60);
+    return `${minutes} ${minutes === 1 ? 'minute' : 'minutes'} ago`;
+  } else if (diffInSeconds < 86400) {
+    const hours = Math.floor(diffInSeconds / 3600);
+    return `${hours} ${hours === 1 ? 'hour' : 'hours'} ago`;
+  } else {
+    const days = Math.floor(diffInSeconds / 86400);
+    return `${days} ${days === 1 ? 'day' : 'days'} ago`;
+  }
 }