# Walk-Through Frontend Integration

## Purpose

Walk-through check-ins follow the frontend three-layer architecture.

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

## Files

View layer:

- `frontend/src/components/frameworks/WalkThroughCheckIn.tsx`
- `frontend/src/components/frameworks/WalkThroughForm.tsx`
- `frontend/src/components/frameworks/WalkThroughSummary.tsx`
- `frontend/src/components/walkthrough-checkin/`
- `frontend/src/components/walkthrough-form/`
- `frontend/src/components/walkthrough-summary/`

Business logic layer:

- `frontend/src/business/walkthrough/hooks.ts`
- `frontend/src/business/walkthrough/formHooks.ts`
- `frontend/src/business/walkthrough/mappers.ts`
- `frontend/src/business/walkthrough/selectors.ts`
- `frontend/src/business/walkthrough/types.ts`
- `frontend/src/business/walkthrough/validators.ts`

API/data access layer:

- `frontend/src/shared/api/walkthrough.ts`
- `frontend/src/shared/types/walkthrough.ts`
- `frontend/src/shared/constants/walkthrough.ts`

## Behavior

- Check-in history and summary data load from `GET /api/walkthrough_checkins`.
- New check-ins are saved through `POST /api/walkthrough_checkins`.
- Delete support exists in the typed API/business layer for future view controls.
- Shared constants own rating categories, staff options, time ranges, and display labels.
- `useWalkthroughCheckInPage` owns check-in page tabs, refresh, submit orchestration, loading/submitting/error state, stats, and history rows.
- Business selectors own rating lookup, check-in stats, history row mapping, averages, trends, flags, recognitions, and status colors.
- Business validators own walk-through form submission readiness.
- `WalkThroughCheckIn.tsx` is a thin wrapper that renders focused check-in components under `frontend/src/components/walkthrough-checkin/`.
- `useWalkthroughForm` owns form draft state, rating/comment updates, submit DTO construction, and submitted/reset state.
- `WalkThroughForm.tsx` is a thin wrapper that renders focused form components under `frontend/src/components/walkthrough-form/`.
- Walk-through form controls use shared UI primitives: `Button`, `Input`, `Textarea`, and `StatePanel` where applicable.
- `useWalkthroughSummary` owns summary filters, presentation/report mode, growth plan draft state, filtered check-ins, category averages, trend data, teacher frequencies, and generated summary text.
- `WalkThroughSummary.tsx` is a thin wrapper that renders loading, empty, presentation, printable report, or main summary views.

## Remaining Related Work

If summaries need server-side aggregation for reporting, add a backend summary endpoint. Keep the frontend selector calculations for local display only.
