40227-vm/frontend/docs/top-bar-integration.md
2026-06-12 06:55:35 +02:00

1.7 KiB

Top Bar Integration

Purpose

TopBar renders app-shell search, campus/role badges, notifications, and the profile menu (which delegates sign-out to the auth session) through the three-layer frontend architecture.

View -> Business Logic -> API/Data Access -> Backend

TopBar does not own product content records. It owns shell UI state and delegates auth actions to the auth session.

Frontend Layers

View:

  • frontend/src/components/frameworks/TopBar.tsx
  • frontend/src/components/top-bar/TopBarView.tsx
  • frontend/src/components/top-bar/TopBarSearch.tsx
  • frontend/src/components/top-bar/TopBarBadges.tsx
  • frontend/src/components/top-bar/TopBarNotifications.tsx
  • frontend/src/components/top-bar/TopBarProfileMenu.tsx

Business logic:

  • frontend/src/business/top-bar/hooks.ts
  • frontend/src/business/top-bar/selectors.ts
  • frontend/src/business/top-bar/types.ts

Shared config:

  • frontend/src/shared/constants/topBar.ts

Behavior

  • TopBar.tsx is a thin wrapper that reads auth session state and passes it into useTopBarPage.
  • useTopBarPage owns profile menu state, notifications menu state, search query state, and sign-out error state.
  • Selectors handle initials, campus label fallback, shared role labels, and unread notification count.
  • View components receive a prepared page model and do not call API/data access modules.
  • Profile and settings menu items are explicitly disabled until product workflows exist, instead of rendering silent no-op buttons.

Data Ownership Rules

  • Do not add notification seed data to frontend constants.
  • Keep TopBar constants limited to role badge classes and static menu labels.
  • Future persisted notifications should use a backend API and a dedicated business hook.