Fix 500 error in checkout caused by undefined variable

[cursor]

Summary

Fixes FRONTEND-REACT-6B2

This PR fixes a 500 Internal Server Error that occurred during checkout when users submitted their order.

Problem

The $quantities variable in ProductController.php was being checked with empty() before it was initialized. In PHP, empty() on an undefined variable returns true, which caused the code to always throw an "Invalid checkout request: cart is empty" exception, even when the cart contained items.

Solution

Moved the initialization of $quantities (lines 203-206) to occur before the empty() check (line 208). This ensures the variable is properly defined before validation.

Changes

• File: laravel/app/Http/Controllers/Api/ProductController.php
• Change: Reordered lines 203-210 to initialize $quantities before checking if it's empty

Testing

The fix ensures that:

• Valid checkout requests with items in the cart will no longer throw the "cart is empty" exception
• The empty check will still work correctly for truly empty carts
• Inventory validation proceeds as intended

  

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
empower	Ignored		Mar 25, 2026 7:00pm

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 22.01%. Comparing base (4272cc5) to head (6daa609).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1381   +/-   ##
=======================================
  Coverage   22.01%   22.01%           
=======================================
  Files          42       42           
  Lines        1363     1363           
  Branches      176      175    -1     
=======================================
  Hits          300      300           
  Misses       1036     1036           
  Partials       27       27           

Flag	Coverage Δ
api	5.82% <ø> (ø)
frontend	32.37% <ø> (ø)

Components	Coverage Δ
checkout_module	5.82% <ø> (ø)
product_component	26.03% <ø> (ø)