improvement: notify counter badge added to treatment and tasks tabs for upadted and edited cases.

frontend/src/lib/tabBadgeUtils.ts

@@ -0,0 +1,31 @@
+export type TabBadgeCounts = {
+  cases?: number;
+  tasks?: number;
+  treatment?: number;
+};
+
+export type LabCaseTabReadTarget = 'CASES' | 'TASKS' | 'TREATMENT';
+
+const TAB_BADGES_CHANGED_EVENT = 'tab-badges-changed';
+
+export function notifyTabBadgesChanged() {
+  window.dispatchEvent(new Event(TAB_BADGES_CHANGED_EVENT));
+}
+
+export function tabBadgesChangedEventName() {
+  return TAB_BADGES_CHANGED_EVENT;
+}
+
+export function tabFromPathname(pathname: string): LabCaseTabReadTarget | null {
+  if (pathname === '/cases' || pathname.startsWith('/cases/')) return 'CASES';
+  if (pathname === '/tasks' || pathname.startsWith('/tasks/')) return 'TASKS';
+  if (pathname === '/treatment' || pathname.startsWith('/treatment/')) return 'TREATMENT';
+  return null;
+}
+
+export function badgeCountForPath(counts: TabBadgeCounts, pathname: string): number {
+  if (pathname === '/cases' || pathname.startsWith('/cases/')) return counts.cases ?? 0;
+  if (pathname === '/tasks' || pathname.startsWith('/tasks/')) return counts.tasks ?? 0;
+  if (pathname === '/treatment' || pathname.startsWith('/treatment/')) return counts.treatment ?? 0;
+  return 0;
+}