# CC Soccer D11 - Session Handoff

**Last Updated:** January 21, 2026 - 6:40pm  
**Status:** ✅ Cart duplicate prevention working via EventSubscriber

---

## ✅ COMPLETED: Cart Duplicate Prevention Fix

**Problem:** Users could add same season/tournament to cart multiple times, bypassing validation.

**Root Cause:** Commerce uses event-driven architecture, not form submissions. Cart operations use AJAX and combine duplicate products by incrementing quantity.

**Solution Implemented:**
- Created `CartEventSubscriber` to listen to `CartEvents::CART_ENTITY_ADD`
- Detects duplicates by checking if quantity > 1 (Commerce auto-combines)
- Forces quantity back to 1 and displays warning message
- Also enforces quantity = 1 on manual quantity changes via `CART_ORDER_ITEM_UPDATE` event

**Files Modified:**
1. `/web/modules/custom/ccsoccer/src/EventSubscriber/CartEventSubscriber.php` (new file)
2. `/web/modules/custom/ccsoccer/ccsoccer.services.yml` (added service registration)
3. `/web/modules/custom/ccsoccer/ccsoccer.module` (removed non-working hooks, fixed syntax error)

**Testing Results:**
- ✅ First add: Works correctly, quantity = 1
- ✅ Duplicate add: Warning displayed, quantity forced back to 1
- ✅ Manual quantity change: Warning displayed, quantity forced back to 1
- ✅ Works for both season_registration and tournament_registration products

**Log Evidence:**
```
First add:    Quantity: 1, "First add (quantity = 1), allowing"
Duplicate add: Quantity: 2, "DUPLICATE DETECTED via quantity > 1! Forcing back to 1."
```

**Warning Message:**
"You already have 'Men's 35+ Fall 2025' in your cart. You cannot register for the same season/tournament multiple times."

---

## Current System State

### Working Features
- ✅ Season registration (individual + groups)
- ✅ Tournament registration (captain + join team + CCSoccer pool)
- ✅ Unified group management (seasons + tournaments)
- ✅ Notification system (email + SMS with dev environment blocking)
- ✅ Credits system (season only)
- ✅ Roster builder with drag-drop
- ✅ Schedule builder with randomization
- ✅ Game status banner (always visible)
- ✅ Commerce integration (payments via Authorize.net)
- ✅ Jersey purchase integration
- ✅ Cart duplicate prevention ← JUST FIXED

### Known Issues
- None currently blocking

---

## Development Environment

**Stack:**
- DDEV local development
- Drupal 11
- PHP 8.3
- MariaDB 10.6+

**Key Commands:**
```bash
ddev drush cr              # Clear cache
ddev drush wd-del all -y   # Clear logs
ddev drush wd-show         # View logs
ddev drush cex -y          # Export config
ddev drush cim -y          # Import config
```

**Notification Testing:**
- Local emails → MailHog: https://ccsoccer-d11.ddev.site:8026
- SMS disabled in dev (checks environment)

---

## For Next Session

### Priority Tasks
1. Test complete registration flow end-to-end
2. Test checkout with credits
3. Test group invitations
4. Test tournament team invitations

### Nice to Have
- Hide Commerce's green "added to cart" message when duplicate is detected
- Consider showing more prominent error (instead of warning)

---

## Collaboration Notes

**Working with Andrew:**
- Always `git pull` before `git push`
- Use SESSION_HANDOFF.md for detailed context
- View existing files before modifying (no complete file replacements)
- Comprehensive testing before commits

**Code Style:**
- Complete functions (not partial updates)
- Detailed logging for debugging
- Clear comments explaining business logic
- Follow Drupal coding standards

---

## Git Workflow Reminder

```bash
git pull                          # Always pull first
git status                        # Check what changed
git add .                         # Stage changes
git commit -m "Descriptive msg"   # Commit
git push                          # Push to remote
```

**When conflicts occur:**
1. Review conflicted files
2. Manually merge keeping both changes where appropriate
3. Test thoroughly
4. Commit resolution