Contact person: Laravel Cart Minimum-Order Fix (Budget is $10 to $12 only)

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Location: Varanasi, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I have an existing Laravel e-commerce site where shipping methods are already implemented. However, selecting a shipping method from the cart/checkout UI incorrectly applies shipping charges in some scenarios because the server-side validation for the shipping method's `minimum_order_amount` is either missing or inconsistent. I need an experienced Laravel developer to audit and fix the logic so shipping cost / free-shipping rules are validated and applied correctly in all flows (add-to-cart, update-quantity, cart page, buy-now, checkout shipping selection).

What’s broken / expected behavior

* Each `ShippingMethod` has a `minimum_order_amount` and a `cost`.
* If the checked cart subtotal for a cart group meets or exceeds the `minimum_order_amount`, shipping for that cart group should be free (shipping cost = 0).
* If subtotal < minimum, shipping cost should be the shipping method's `cost`.
* Currently:

* Selecting a shipping method on the cart page sometimes applies shipping charge immediately without checking minimum.
* Increasing/decreasing quantity, direct buy-now, or switching to checkout may leave old shipping charges in place (not revalidated).
* AJAX endpoint used by the frontend may be missing or not validating server-side (Postman showed 404 in debugging).
* Client-side checks exist but server must be authoritative — server currently inconsistent.

Tech stack

* Laravel (PHP) — existing codebase (CartManager, CartShipping, Cart model, ShippingMethod model)
* Blade templates + jQuery (frontend)
* MySQL (or current DB)
* You will modify existing backend controllers, route(s), CartManager utilities, and frontend JS/Blade partials as needed.

Files / areas to inspect & change (expected)

* `app/Utils/[login to view URL]` — ensure `get_shipping_cost`, `updateOrderSummaryShippingCost`, `getShippingCostSavedForFreeDelivery`, and new helpers like `isFreeShippingEligible`/`getRemainingAmountForFreeShipping` are consistent and authoritative.
* Blade cart page(s) (cart list / cart-details) — ensure shipping options have `data-minimum_order_amount` and JS does client-side validation only for UX, and triggers a secure server endpoint.
* `routes/[login to view URL]` — POST route for `/customer/set-shipping-method` (or match your existing routing scheme).
* Controller (create or update): e.g. `CustomerShippingController::setShippingMethod(Request $request)` — must validate shipping method ID, compute cart group subtotal server-side, enforce `minimum_order_amount`, update or create `CartShipping` records and return JSON.
* `resources/js` or Blade inline JS: call AJAX to `/customer/set-shipping-method` and handle responses; do not trust client validation for final cost.
* Clear route/cache where necessary (`php artisan route:clear`, `cache:clear`).
* Add/update tests or manual testing steps (optional but preferred).

Deliverables

1. Fixes applied to the repository (clear patch/PR or zipped patch) — all changed files listed in PR description.
2. New or updated controller method for setting shipping method securely.
3. Route added/verified for `/customer/set-shipping-method` (or match existing route name) with CSRF and session handling.
4. CartManager improvements (if needed) so `get_shipping_cost()` and `updateOrderSummaryShippingCost()` compute shipping correctly for:

* add-to-cart (single product buy-now flow)
* cart quantity update
* selecting shipping method on cart page (per group or all groups)
* checkout page selection
5. Frontend JS/Blade update to call the endpoint and display correct messages (e.g., when minimum not reached).
6. Short QA checklist and manual test instructions (what to click / expected results).
7. (Optional) Unit test(s) or integration test(s) for shipping cost calculation.
8. Brief notes describing the bug root cause and what you changed.

Acceptance criteria

* When a shipping method is selected, the server endpoint validates the selected shipping method against the server-calculated checked-subtotal for that cart group. If subtotal >= minimum -> shipping cost = 0. Else -> shipping cost = method.cost.
* Changing cart quantities and toggling checkboxes re-triggers validation (either via AJAX recalculation or on next page load) and results are consistent.
* All flows described above (add-to-cart → buy-now, cart update quantity, checkout shipping selection) show correct shipping or free shipping immediately after action, and persisted in DB (`cart_shippings` or equivalent).
* No 404 from AJAX when selecting shipping method. The route and CSRF must work in browser.
* No broken Blade syntax or JS console errors.
* Provide short test steps that confirm the fix.

Desired developer skills

* Laravel 8/9/10 experience, strong knowledge of middleware, session and request lifecycle.
* Comfortable reading and modifying helpers / utility classes.
* Experience with payments/shipping logic and multi-seller cart grouping is a plus.
* Familiar with Blade and jQuery AJAX.
* Good communication and concise PR notes.

Estimated effort

* Small-medium bugfix: ~4–10 hours (developer’s estimate). Please propose your estimated hours and availability.

What I will provide

* Access to a staging/dev branch (GitHub) or code archive.
* DB dump / credentials for staging (on request).
* Reproduction steps where the bug occurs.

How to apply

* Share a brief plan (2–3 steps) you will follow to fix and validate the issue.
* Share one or two past Laravel bugfix examples (links or short descriptions).
* Estimated hours and hourly rate or fixed price.
* Earliest start date.

Screening questions (include in application)

1. Have you previously fixed shipping/free-shipping minimum logic in a Laravel ecommerce project? Briefly describe.
2. How will you ensure the server is authoritative for shipping validation (one-sentence answer)?
3. Can you commit changes and provide a PR with descriptive commit messages?" (client-provided description)