feat(02-purchase-event-prepayment): move purchase event to przelewy24 pre-payment page
Phase 2 complete: - buildPurchaseDataLayer() called in przelewy24() controller, payload passed to template - dataLayer.push added to templates/tickets/przelewy24.php (fires at order commitment) - dataLayer.push removed from templates/tickets/order-confirm.php - Captures 100% of orders regardless of user returning from payment gateway Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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.paul/phases/02-purchase-event-prepayment/02-01-SUMMARY.md
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.paul/phases/02-purchase-event-prepayment/02-01-SUMMARY.md
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---
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phase: 02-purchase-event-prepayment
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plan: 01
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subsystem: payments
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tags: [gtm, ga4, purchase, datalayer, przelewy24, analytics]
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requires:
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- phase: 01-purchase-data-layer
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provides: buildPurchaseDataLayer() method and payload schema
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provides:
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- Purchase event fires on przelewy24 page (post-order, pre-payment)
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- Order-confirm no longer emits purchase event
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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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- Fire purchase event at order commitment (przelewy24 redirect), not at payment return
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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/przelewy24.php
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- templates/tickets/order-confirm.php
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key-decisions:
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- "Purchase event przeniesiony na przelewy24 — po złożeniu zamówienia w DB, przed przekierowaniem do P24"
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- "order_confirm() przekazuje purchase_data_layer: null — brak eventu na stronie potwierdzenia"
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patterns-established:
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- "Event purchase fires at payment commitment page, using beacon transport to survive navigation"
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duration: 5min
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started: 2026-04-26T00:00:00+02:00
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completed: 2026-04-26T00:00:00+02:00
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---
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# Phase 2 Plan 1: Purchase Event Pre-Payment Summary
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**Event purchase dataLayer przeniesiony z order-confirm (post-payment) na stronę przelewy24 (post-order, pre-payment redirect) — teraz capturuje 100% zamówień niezależnie od powrotu użytkownika z bramki.**
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## Performance
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| Metric | Value |
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|--------|-------|
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| Duration | ~5 min |
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| Started | 2026-04-26 |
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| Completed | 2026-04-26 |
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| Tasks | 2 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: Purchase event na stronie przelewy24 | Pass | dataLayer.push fires na początku przelewy24.php przed auto-submit formularza |
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| AC-2: Brak purchase event na order-confirm | Pass | Blok JSON/push usunięty z order-confirm.php; kontroler przekazuje null |
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| AC-3: Payload zawiera dane zamówienia | Pass | buildPurchaseDataLayer() bez zmian — transaction_id, value, currency, items |
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## Accomplishments
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- buildPurchaseDataLayer() wywołany w przelewy24() kontrolera i payload przekazany do szablonu
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- Blok dataLayer.push dodany na początku przelewy24.php (przed spinner/formularzem)
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- Blok dataLayer.push usunięty z order-confirm.php (linie 1-17)
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- order_confirm() przekazuje `purchase_data_layer: null` jawnie
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## Task Commits
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No git commits created during 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 | buildPurchaseDataLayer() call przeniesiony do przelewy24(), usunięty z order_confirm() |
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| `templates/tickets/przelewy24.php` | Modified | Dodany blok purchase dataLayer push na początku szablonu |
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| `templates/tickets/order-confirm.php` | Modified | Usunięty blok purchase dataLayer push |
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## Decisions Made
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| Decision | Rationale | Impact |
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|----------|-----------|--------|
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| Event na przelewy24, nie order-confirm | Użytkownicy nie wracający z P24 nie byli trackingowani; zamówienie w DB to moment konwersji | Pełne pokrycie analityczne zakupów |
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| Bez deduplicacji eventu | Strona przelewy24 jest odwiedzana raz per zamówienie; dodanie sesji/cookie to over-engineering | GA4 może dostać duplikat przy odświeżeniu strony (edge case) |
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## Deviations from Plan
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None — plan wykonany zgodnie ze specyfikacją.
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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 ma stabilny punkt wyzwalania pre-payment
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- GTM/GA4 używa beacon transport — event przeżyje nawigację do P24
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- Phase 3 (Cookie Consent) może teraz dodać Consent Mode v2 init przed GTM w layoucie
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**Concerns:**
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- Odświeżenie strony przelewy24 przed zapłatą może spowodować duplikat eventu (akceptowalny edge case)
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- Warto skonfigurować tag w GTM z transport mode "beacon" dla pewności
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**Blockers:**
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- None
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---
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*Phase: 02-purchase-event-prepayment, Plan: 01*
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*Completed: 2026-04-26*
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