# Plan: Implement Check-in Logic

## TL;DR

> **Quick Summary**: Connect the scanner to the backend check-in API. When a 6-digit code is scanned, submit it to `/event/checkin/submit`. Show success/error toasts.
> 
> **Deliverables**:
> - Updated `CheckinScannerNavContainer` with mutation logic.
> - Integration with `sonner` for user feedback.
> - Proper parameter mapping (`checkin_code`).
> 
> **Estimated Effort**: Short
> **Parallel Execution**: NO - sequential implementation.
> **Critical Path**: Implement Mutation → Update View Integration

---

## Context

### Original Request
"扫码器扫到的如果是6位数字，使用/event/checkin/submit接口进行签到，成功/失败都弹出toaster提示。"

### Interview Summary
**Key Discussions**:
- **API**: `postEventCheckinSubmit` is the correct client function.
- **Parameters**: API expects `checkin_code` in the body.
- **Input**: "6位数字" implies regex validation `^\d{6}$`.
- **Feedback**: Use `sonner` (`toast.success`, `toast.error`).

**Metis Review Findings**:
- **Critical Fix**: Ensure parameter name is `checkin_code`, not `code`.
- **UX**: Disable scanning while `isPending` to prevent double submissions.
- **Error Handling**: Use generic "签到失败" for errors unless specific message available.

---

## Work Objectives

### Core Objective
Make the check-in scanner functional by connecting it to the backend.

### Concrete Deliverables
- `src/components/checkin/checkin-scanner-nav.container.tsx`: Updated with `useMutation`.
- `src/components/checkin/checkin-scanner-nav.view.tsx`: Updated to receive `isPending` prop and handle scan events.

### Definition of Done
- [ ] Scanning "123456" calls API with `{"checkin_code": "123456"}`.
- [ ] Success response shows "签到成功" toast.
- [ ] Error response shows "签到失败" toast.
- [ ] Scanner ignores non-6-digit inputs.
- [ ] Scanner pauses/ignores input while API is pending.

### Must Have
- Regex validation: `^\d{6}$`.
- `checkin_code` parameter mapping.
- Toaster feedback.

### Must NOT Have (Guardrails)
- Do NOT change the existing permission logic in the container.
- Do NOT remove the Dialog wrapping.

---

## Verification Strategy (MANDATORY)

> **UNIVERSAL RULE: ZERO HUMAN INTERVENTION**
> ALL tasks in this plan MUST be verifiable WITHOUT any human action.

### Test Decision
- **Infrastructure exists**: YES (Playwright).
- **Automated tests**: YES (Playwright API mocking).

### Agent-Executed QA Scenarios (MANDATORY)

**Scenario 1: Successful Check-in**
- **Tool**: Playwright
- **Steps**:
    1. Mock `/event/checkin/submit` to return 200 OK.
    2. Simulate scan event with "123456".
    3. Assert API called with correct body.
    4. Assert "签到成功" toast visible.

**Scenario 2: Failed Check-in**
- **Tool**: Playwright
- **Steps**:
    1. Mock `/event/checkin/submit` to return 400 Bad Request.
    2. Simulate scan event with "123456".
    3. Assert "签到失败" toast visible.

**Scenario 3: Invalid Input**
- **Tool**: Playwright (if view exposes logic) or Unit Test
- **Steps**:
    1. Simulate scan event with "ABC".
    2. Assert API NOT called.

---

## Execution Strategy

### Parallel Execution Waves

```
Wave 1:
├── Task 1: Create Data Hook
└── Task 2: Implement Container & View Logic
```

---

## TODOs

- [x] 1. Create Data Hook

  **What to do**:
  - Create `src/hooks/data/useCheckinSubmit.ts`.
  - Import `useMutation` from `@tanstack/react-query`.
  - Import `postEventCheckinSubmitMutation` from `@/client/@tanstack/react-query.gen`.
  - Import `toast` from `sonner`.
  - Export `useCheckinSubmit` hook that returns the mutation.
  - Use `...postEventCheckinSubmitMutation()` pattern.
  - On success: `toast.success('签到成功')`.
  - On error: `toast.error('签到失败')`.

  **Recommended Agent Profile**:
  - **Category**: `quick`
  - **Skills**: [`frontend-ui-ux`]

  **Parallelization**:
  - **Can Run In Parallel**: YES
  - **Parallel Group**: Wave 1

  **References**:
  - `src/hooks/data/useJoinEvent.ts` (Pattern reference)
  - `src/client/@tanstack/react-query.gen.ts`

  **Acceptance Criteria**:
  - [ ] Hook uses `@hey-api` pattern.
  - [ ] Toasts are configured.

- [x] 2. Implement Container & View Logic

  **What to do**:
  - Update `src/components/checkin/checkin-scanner-nav.container.tsx`:
    - Import `useCheckinSubmit` from `@/hooks/data/useCheckinSubmit`.
    - Use the hook to get `mutate` and `isPending`.
    - Pass `handleScan` (wrapper calling mutate with `{ body: { checkin_code: code } }`) and `isPending` to View.
  - Update `src/components/checkin/checkin-scanner-nav.view.tsx`:
    - Accept `onScan` and `isPending` props.
    - Inside internal `handleScan`, check regex `^\d{6}$`.
    - If valid and !isPending, call prop `onScan`.

  **Recommended Agent Profile**:
  - **Category**: `visual-engineering`
  - **Skills**: [`frontend-ui-ux`]

  **Parallelization**:
  - **Can Run In Parallel**: YES
  - **Parallel Group**: Wave 1
  - **References**:
  - `src/hooks/data/useCheckinSubmit.ts` (Dependency)

  **Acceptance Criteria**:
  - [ ] Container uses the new hook.
  - [ ] View logic validates regex.

- [ ] 2. Update Playwright Verification

  **What to do**:
  - Update `tests/checkin-scanner.spec.ts`.
  - Add test case for successful check-in (mock API success).
  - Add test case for failed check-in (mock API failure).
  - Verify toaster appearance.

  **Recommended Agent Profile**:
  - **Category**: `quick`
  - **Skills**: [`playwright`]

  **Parallelization**:
  - **Can Run In Parallel**: NO
  - **Parallel Group**: Wave 1
  - **Blocked By**: Task 1

  **References**:
  - `tests/checkin-scanner.spec.ts`

  **Acceptance Criteria**:
  - [ ] Tests pass.

  **Agent-Executed QA Scenarios**:
  ```
  Scenario: Run Updated Tests
    Tool: Bash
    Steps:
      1. npx playwright test tests/checkin-scanner.spec.ts
  ```

---

## Success Criteria

### Final Checklist
- [ ] API integration complete.
- [ ] Regex validation matches `^\d{6}$`.
- [ ] User feedback (toasts) functional.