Role-Aware Bottom Navigation
Component Detail
Description
Bottom navigation bar that conditionally renders tabs and restricts navigation options based on the user's active role. Integrates with StatefulShellRoute to preserve per-tab state while enforcing role-based tab visibility.
role-aware-bottom-nav
Summaries
The Role-Aware Bottom Navigation ensures that each user sees only the sections of the app relevant to their active role, creating a clean, focused experience that reduces confusion and prevents accidental access to features outside a user's responsibilities. For organizations deploying the app across diverse user types — such as administrators, mentors, and learners — this component is essential to maintaining clarity and trust in the product. It adapts automatically when a user switches roles, making the transition seamless and the app feel intelligent. As a shared component built once and used everywhere, it lowers development overhead while providing a consistent, role-appropriate interface that supports user adoption and reduces onboarding friction.
The Role-Aware Bottom Navigation is a medium-complexity shared component that sits at the core of the app's navigation architecture and must be delivered before any role-specific feature work can be fully integrated and tested. It depends on role-state-manager for reactive role updates and permission-checker for tab visibility rules, both of which must be stable prior to integration. The use of StatefulShellRoute (go_router) means the routing architecture must be finalized early, as changes to route structure after this component is built will require rework.
Testing scope includes all role permutations, tab visibility rules, and state preservation across tab switches. Any change to role permissions or navigation structure will require regression testing of this component.
The Role-Aware Bottom Navigation integrates with Flutter's go_router StatefulShellRoute to preserve per-tab navigation state while enforcing role-based tab visibility. The four core interfaces are: buildNavBar(Role activeRole) renders the filtered tab bar, getPermittedTabs(Role role) queries permission-checker for allowed tabs, onTabSelected(int index) drives tab-level routing, and getCurrentTabIndex() exposes current state for external consumers. It depends on role-state-manager (reactive role stream) and permission-checker (tab filtering logic). When the active role changes, the widget rebuilds via the reactive role stream, recalculates permitted tabs, and updates the visible navigation.
State preservation via StatefulShellRoute means each permitted tab maintains its own navigation stack independently. Careful handling is needed to avoid stale tab indexes when tabs are removed after a role switch.
Responsibilities
- Render only tabs permitted for the active role
- Preserve tab state across role-allowed navigation using StatefulShellRoute
- Update visible tabs when active role changes
Interfaces
buildNavBar(Role activeRole)
getPermittedTabs(Role role)
onTabSelected(int index)
getCurrentTabIndex()
Relationships
Dependencies (2)
Components this component depends on