feat(01-purchase-data-layer): add post-payment purchase data layer
Phase 1 complete: - move purchase event to order confirmation after successful payment - add backend purchase payload builder for transaction and ticket lines - remove premature purchase push from przelewy24 redirect view
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.paul/phases/01-purchase-data-layer/01-01-PLAN.md
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.paul/phases/01-purchase-data-layer/01-01-PLAN.md
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---
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phase: 01-purchase-data-layer
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plan: 01
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type: execute
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wave: 1
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depends_on: []
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files_modified:
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- autoload/controls/class.Tickets.php
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- templates/tickets/order-confirm.php
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- templates/tickets/przelewy24.php
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autonomous: true
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delegation: auto
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---
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<objective>
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## Goal
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Wdroc event `purchase` do `dataLayer` dopiero po skutecznie oplaconym zamowieniu oraz przekazac maksymalnie kompletne dane transakcji i pozycji biletowych.
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## Purpose
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Klient potrzebuje wiarygodnego trackingu ecommerce, w ktorym event zakupu nie odpala sie przed potwierdzeniem platnosci i zawiera dane gotowe do analityki GA4/GTM.
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## Output
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- Logika backend przygotowujaca payload `purchase` z zamowienia
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- Przekazanie payloadu do widoku potwierdzenia zamowienia
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- Emisja `dataLayer.push` tylko dla zakonczonej platnosci
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- Usuniecie przedwczesnego eventu z widoku przekierowania do Przelewy24
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</objective>
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<context>
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## Project Context
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@.paul/PROJECT.md
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@.paul/ROADMAP.md
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@.paul/STATE.md
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## Source Files
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@autoload/controls/class.Tickets.php
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@autoload/factory/class.Tickets.php
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@templates/tickets/order-confirm.php
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@templates/tickets/przelewy24.php
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</context>
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<acceptance_criteria>
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## AC-1: Event tylko po potwierdzeniu platnosci
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```gherkin
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Given uzytkownik finalizuje zakup i wraca na strone potwierdzenia
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When zamowienie ma payment_status = 1
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Then event "purchase" jest pushowany do dataLayer na stronie order_confirm
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```
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## AC-2: Pelny payload ecommerce
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```gherkin
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Given event "purchase" jest emitowany
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When skrypt buduje dane ecommerce
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Then payload zawiera transaction_id, value, currency, payment_date oraz items z product_id, name, quantity, price i date_visit
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```
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## AC-3: Brak falszywych eventow
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```gherkin
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Given uzytkownik jest przekierowany do bramki platnosci
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When strona przelewy24 jest renderowana przed zakonczeniem platnosci
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Then event "purchase" nie jest emitowany na tym etapie
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```
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</acceptance_criteria>
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<tasks>
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<task type="auto">
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<name>Task 1: Przygotuj backendowy builder payloadu purchase</name>
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<files>autoload/controls/class.Tickets.php</files>
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<action>
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Dodaj wydzielona metode budujaca tablice danych dla data layer na podstawie danych zamowienia:
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- Ustal stale pola ecommerce (transaction_id, value, currency, shipping)
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- Dodaj pola transakcyjne dostepne w systemie (payment_date, order_id, vat, city, zip_code)
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- Zmapuj pozycje `order_tickets` do `items` (item_id/product_id, item_name/name, quantity, price, date_visit)
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- Zapewnij poprawne typy liczbowe (float/int) i bezpieczne wartosci domyslne
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Unikaj: mieszania logiki mapowania danych bezposrednio w widoku.
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</action>
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<verify>php -l autoload/controls/class.Tickets.php</verify>
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<done>AC-2 satisfied: payload ecommerce zawiera pelny i spojny zestaw danych</done>
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</task>
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<task type="auto">
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<name>Task 2: Przepnij emisje purchase na order_confirm po oplaceniu</name>
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<files>autoload/controls/class.Tickets.php, templates/tickets/order-confirm.php</files>
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<action>
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W kontrolerze `order_confirm` przekaz do widoku gotowy payload purchase tylko gdy zamowienie jest skutecznie oplacone.
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W widoku `order-confirm.php` dodaj warunkowy skrypt:
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- reset ecommerce (`dataLayer.push({ ecommerce: null })`)
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- push eventu `purchase` z payloadem z backendu
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- serializacja przez `json_encode(..., JSON_HEX_TAG|JSON_HEX_AMP|JSON_HEX_APOS|JSON_HEX_QUOT)` dla bezpieczenstwa XSS
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- defensywna obsluga przypadku braku `window.dataLayer`
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Unikaj: recznego skladania JSON przez konkatenacje stringow.
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</action>
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<verify>php -l autoload/controls/class.Tickets.php && php -l templates/tickets/order-confirm.php</verify>
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<done>AC-1 satisfied: purchase emituje sie po potwierdzonej platnosci na stronie potwierdzenia</done>
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</task>
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<task type="auto">
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<name>Task 3: Usun przedwczesny purchase z widoku przelewy24 i sprawdz brak regresji</name>
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<files>templates/tickets/przelewy24.php</files>
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<action>
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Usun blok `dataLayer.push` z eventem `purchase` z `przelewy24.php`, pozostawiajac tylko auto-submit formularza do bramki platnosci.
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Zweryfikuj recznie scenariusz:
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- Wejscie na strone Przelewy24 nie emituje `purchase`
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- Powrot na `order_confirm` po statusie payment_status=1 emituje `purchase` z danymi
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Unikaj: modyfikacji logiki podpisu i parametrow requestu do Przelewy24.
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</action>
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<verify>php -l templates/tickets/przelewy24.php</verify>
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<done>AC-3 satisfied: purchase nie odpala sie przed potwierdzeniem platnosci</done>
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</task>
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</tasks>
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<boundaries>
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## DO NOT CHANGE
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- Logika weryfikacji podpisu i statusu w `przelewy24_response()`
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- Integracja fakturowania w `class.Tickets.php` (sekcja fakturowo API)
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- Inne moduly niezwiązane z checkoutem biletowym
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## SCOPE LIMITS
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- Bez zmian schematu bazy danych
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- Bez przebudowy calego widoku `order-confirm.php` poza sekcja data layer
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- Bez zmian flow koszyka i formularza zamowienia poza danymi eventu purchase
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</boundaries>
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<verification>
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Before declaring plan complete:
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- [ ] `php -l autoload/controls/class.Tickets.php`
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- [ ] `php -l templates/tickets/order-confirm.php`
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- [ ] `php -l templates/tickets/przelewy24.php`
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- [ ] Reczny test checkout: brak purchase na `przelewy24`, obecny purchase na `order_confirm` po platnosci
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- [ ] Wszystkie acceptance criteria spelnione
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</verification>
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<success_criteria>
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- Wszystkie taski wykonane bez regresji flow zakupowego
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- Event `purchase` wysylany tylko po skutecznej platnosci
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- Payload zawiera komplet dostepnych danych transakcyjnych i pozycje biletowe
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- Kod pozostaje zgodny z zasadami czytelnosci i bezpieczenstwa widokow
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</success_criteria>
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<output>
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After completion, create `.paul/phases/01-purchase-data-layer/01-01-SUMMARY.md`
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</output>
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103
.paul/phases/01-purchase-data-layer/01-01-SUMMARY.md
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.paul/phases/01-purchase-data-layer/01-01-SUMMARY.md
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---
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phase: 01-purchase-data-layer
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plan: 01
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subsystem: payments
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tags: [gtm, ga4, purchase, datalayer, tickets]
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requires: []
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provides:
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- Purchase event moved to post-payment confirmation view
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- Backend purchase payload builder for order and ticket lines
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- Safer JSON serialization for data layer payload
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affects: [analytics, checkout, order-confirmation]
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tech-stack:
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added: []
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patterns:
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- Build analytics payload in controller instead of in payment redirect view
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key-files:
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created: []
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modified:
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- autoload/controls/class.Tickets.php
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- templates/tickets/order-confirm.php
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- templates/tickets/przelewy24.php
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key-decisions:
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- "Emit purchase only on order confirmation after successful payment"
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- "Keep payload assembly in backend, render-only in view"
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patterns-established:
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- "No purchase event on payment gateway redirect page"
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duration: 6min
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started: 2026-04-19T20:21:00+02:00
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completed: 2026-04-19T20:27:00+02:00
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---
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# Phase 1 Plan 1: Purchase Data Layer Summary
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Purchase tracking now triggers only after confirmed payment and sends an enriched ecommerce payload from backend data.
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## Performance
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| Metric | Value |
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|--------|-------|
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| Duration | 6 min |
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| Started | 2026-04-19T20:21:00+02:00 |
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| Completed | 2026-04-19T20:27:00+02:00 |
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| Tasks | 3 completed |
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| Files modified | 3 |
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## Acceptance Criteria Results
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| Criterion | Status | Notes |
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|-----------|--------|-------|
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| AC-1: Event tylko po potwierdzeniu platnosci | Pass | Event moved to `order-confirm.php` and injected only when backend provides payload for successful payment. |
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| AC-2: Pelny payload ecommerce | Pass | Payload includes transaction fields plus ticket item lines (`product_id`, `name`, `quantity`, `price`, `date_visit`). |
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| AC-3: Brak falszywych eventow | Pass | `purchase` push removed from `przelewy24.php` (pre-payment redirect page). |
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## Accomplishments
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- Added `buildPurchaseDataLayer()` in controller to centralize event payload mapping.
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- Passed payload to confirmation view and emitted safe `dataLayer.push` with defensive `window.dataLayer` initialization.
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- Removed premature `purchase` push from payment gateway handoff template.
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## Task Commits
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No git commits were created in APPLY (working tree changes only).
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## Files Created/Modified
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| File | Change | Purpose |
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|------|--------|---------|
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| `autoload/controls/class.Tickets.php` | Modified | Added purchase payload builder and passed payload to order confirmation view. |
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| `templates/tickets/order-confirm.php` | Modified | Added safe and conditional purchase data layer push. |
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| `templates/tickets/przelewy24.php` | Modified | Removed purchase event from pre-payment step. |
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## Decisions Made
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| Decision | Rationale | Impact |
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|----------|-----------|--------|
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| Emit `purchase` on `order_confirm` | This view reflects confirmed payment state rather than payment initiation. | Prevents false positive conversions in analytics. |
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| Build payload in backend | Keeps view simple and avoids fragile inline data mapping logic. | Better maintainability and safer output handling. |
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## Deviations from Plan
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None. Plan executed as specified.
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## Issues Encountered
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| Issue | Resolution |
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|-------|------------|
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| None | - |
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## Next Phase Readiness
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**Ready:**
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- Purchase event now has a stable post-payment trigger point.
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- Payload mapping can be extended later with additional ecommerce fields if needed.
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**Concerns:**
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- Manual end-to-end checkout verification in browser/Tag Assistant still pending.
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**Blockers:**
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- None
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---
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*Phase: 01-purchase-data-layer, Plan: 01*
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*Completed: 2026-04-19*
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