---
phase: 17-receipt-duplicate-guard
plan: 01
subsystem: ui
tags: [receipts, duplicate-guard, OrderProAlerts, confirmation]

requires:
  - phase: 10-receipt-creation
    provides: ReceiptController, ReceiptRepository, receipt-create view
provides:
  - Duplicate receipt warning on creation form
  - OrderProAlerts.confirm guard before duplicate receipt submission
affects: []

tech-stack:
  added: []
  patterns: [frontend-guard-with-backend-data]

key-files:
  created: []
  modified:
    - src/Modules/Accounting/ReceiptController.php
    - resources/views/orders/receipt-create.php

key-decisions:
  - "Frontend guard only — no server-side block in store(), user confirms consciously"
  - "Conditional button type (submit vs button) — no JS overhead when no existing receipts"

patterns-established:
  - "Duplicate-guard pattern: backend query → view warning → OrderProAlerts.confirm on submit"

duration: 5min
started: 2026-03-22T00:00:00Z
completed: 2026-03-22T00:05:00Z
---

# Phase 17 Plan 01: Receipt Duplicate Guard Summary

**Frontend guard preventing accidental duplicate receipt creation — warning box + OrderProAlerts.confirm before submit when order already has receipts.**

## Performance

| Metric | Value |
|--------|-------|
| Duration | ~5min |
| Tasks | 2 completed |
| Files modified | 2 |

## Acceptance Criteria Results

| Criterion | Status | Notes |
|-----------|--------|-------|
| AC-1: Formularz pokazuje ostrzeżenie gdy zamówienie ma paragon | Pass | Warning box z numerem, datą, kwotą, configiem |
| AC-2: Submit wymaga potwierdzenia gdy istnieją paragony | Pass | button type="button" + OrderProAlerts.confirm |
| AC-3: Brak ostrzeżenia gdy zamówienie nie ma paragonów | Pass | Warunek PHP $hasExistingReceipts, normalny submit |

## Accomplishments

- Warning box `.alert--warning` z listą istniejących paragonów (numer, data, kwota, config)
- Conditional submit: `type="button"` + `OrderProAlerts.confirm()` gdy istnieją paragony, normalny `type="submit"` gdy brak
- Reuse istniejącego `ReceiptRepository::findByOrderId()` — zero nowego kodu backend poza 2 liniami

## Files Created/Modified

| File | Change | Purpose |
|------|--------|---------|
| `src/Modules/Accounting/ReceiptController.php` | Modified | Dodanie `findByOrderId()` query + przekazanie `existingReceipts` do widoku |
| `resources/views/orders/receipt-create.php` | Modified | Warning box, conditional button type, inline JS z OrderProAlerts.confirm |

## Decisions Made

| Decision | Rationale | Impact |
|----------|-----------|--------|
| Frontend guard only (brak blokady w store()) | Użytkownik świadomie potwierdza — to wystarczający level ochrony | Prostota, brak zmian w logice zapisu |
| Conditional button type zamiast always-JS | Brak narzutu JS gdy nie ma istniejących paragonów | Czystsza implementacja |

## Deviations from Plan

None — plan executed exactly as written.

## Issues Encountered

None.

## Next Phase Readiness

**Ready:**
- Punkt 31 z todo.md zrealizowany
- Pattern duplicate-guard gotowy do reuse w innych formularzach

**Concerns:**
- Brak

**Blockers:**
- None

---
*Phase: 17-receipt-duplicate-guard, Plan: 01*
*Completed: 2026-03-22*