Cart & Checkout

Overview

The Ecom platform provides a comprehensive cart and checkout system that manages shopping sessions, calculates prices with taxes and shipping, applies coupons, and processes orders through a multi-step checkout flow.

Guest & User Carts

Separate cart handling for guests and authenticated users

Dynamic Pricing

Real-time price calculations with discounts and taxes

Coupon System

Cart-based and product-based discount coupons

Multi-Step Checkout

Shipping info, delivery options, and payment selection

Cart Model

The Cart model stores temporary shopping cart data for users.

Cart Structure

class Cart extends Model
{
    protected $guarded = [];
    protected $fillable = [
        'address_id',
        'price',
        'tax',
        'shipping_cost',
        'discount',
        'product_referral_code',
        'coupon_code',
        'coupon_applied',
        'quantity',
        'user_id',
        'temp_user_id',
        'owner_id',
        'product_id',
        'variation'
    ];

    public function user()
    {
        return $this->belongsTo(User::class);
    }

    public function product()
    {
        return $this->belongsTo(Product::class);
    }

    public function address()
    {
        return $this->belongsTo(Address::class);
    }
}

Location: ~/workspace/source/app/Models/Cart.php:9-28

Cart Fields

User Identification

user_id: Authenticated user ID
temp_user_id: Session-based ID for guest users
owner_id: Seller/shop owner ID

The cart supports both authenticated and guest users through a dual identification system.

Product Information

product_id: Reference to product
variation: Product variant (color, size, etc.)
quantity: Number of items
product_referral_code: Affiliate tracking code

Pricing & Discounts

price: Unit price after discounts
tax: Tax amount
shipping_cost: Shipping fee
discount: Coupon discount amount
coupon_code: Applied coupon code
coupon_applied: Boolean flag

Shipping

address_id: Selected delivery address

Cart Management

The CartController handles all cart operations.

Viewing Cart

public function index(Request $request)
{
    if (auth()->user() != null) {
        $user_id = Auth::user()->id;
        
        // Merge temp cart with user cart on login
        if ($request->session()->get('temp_user_id')) {
            Cart::where('temp_user_id', $request->session()->get('temp_user_id'))
                ->update([
                    'user_id' => $user_id,
                    'temp_user_id' => null
                ]);
            Session::forget('temp_user_id');
        }
        
        $carts = Cart::where('user_id', $user_id)->get();
    } else {
        $temp_user_id = $request->session()->get('temp_user_id');
        $carts = ($temp_user_id != null) ? Cart::where('temp_user_id', $temp_user_id)->get() : [];
    }

    return view('frontend.view_cart', compact('carts'));
}

Location: ~/workspace/source/app/Http/Controllers/CartController.php:16-39

Adding to Cart

public function addToCart(Request $request)
{
    $carts = Cart::where('user_id', auth()->user()->id)->get();
    $check_auction_in_cart = CartUtility::check_auction_in_cart($carts);
    $product = Product::find($request->id);
    
    // Prevent mixing auction and regular products
    if($check_auction_in_cart && $product->auction_product == 0) {
        return array(
            'status' => 0,
            'cart_count' => count($carts),
            'modal_view' => view('frontend.'.get_setting('homepage_select').'.partials.removeAuctionProductFromCart')->render(),
            'nav_cart_view' => view('frontend.'.get_setting('homepage_select').'.partials.cart')->render(),
        );
    }
    
    $quantity = $request['quantity'];

    // Check minimum quantity requirement
    if ($quantity < $product->min_qty) {
        return array(
            'status' => 0,
            'cart_count' => count($carts),
            'modal_view' => view('frontend.'.get_setting('homepage_select').'.partials.minQtyNotSatisfied', ['min_qty' => $product->min_qty])->render(),
            'nav_cart_view' => view('frontend.'.get_setting('homepage_select').'.partials.cart')->render(),
        );
    }

    // Create cart variant string
    $str = CartUtility::create_cart_variant($product, $request->all());
    $product_stock = $product->stocks->where('variant', $str)->first();

    // Find or create cart item
    $cart = Cart::firstOrNew([
        'variation' => $str,
        'user_id' => auth()->user()->id,
        'product_id' => $request['id']
    ]);

    // Check stock availability
    if ($cart->exists && $product->digital == 0) {
        if ($product->auction_product == 1 && ($cart->product_id == $product->id)) {
            return array(
                'status' => 0,
                'modal_view' => view('frontend.'.get_setting('homepage_select').'.partials.auctionProductAlredayAddedCart')->render(),
            );
        }
        if ($product_stock->qty < $cart->quantity + $request['quantity']) {
            return array(
                'status' => 0,
                'modal_view' => view('frontend.'.get_setting('homepage_select').'.partials.outOfStockCart')->render(),
            );
        }
        $quantity = $cart->quantity + $request['quantity'];
    }

    // Calculate price and tax
    $price = CartUtility::get_price($product, $product_stock, $request->quantity);
    $tax = CartUtility::tax_calculation($product, $price);
    
    // Save cart item
    CartUtility::save_cart_data($cart, $product, $price, $tax, $quantity);
    
    $carts = Cart::where('user_id', auth()->user()->id)->get();
    return array(
        'status' => 1,
        'cart_count' => count($carts),
        'modal_view' => view('frontend.'.get_setting('homepage_select').'.partials.addedToCart', compact('product', 'cart'))->render(),
        'nav_cart_view' => view('frontend.'.get_setting('homepage_select').'.partials.cart')->render(),
    );
}

Location: ~/workspace/source/app/Http/Controllers/CartController.php:53-122

Cart Validations

Minimum Quantity

Enforces product-specific minimum order quantities

Stock Availability

Prevents adding more items than available stock

Auction Products

Prevents mixing auction and regular products

Duplicate Prevention

Limits one auction product per cart

Removing from Cart

public function removeFromCart(Request $request)
{
    Cart::destroy($request->id);
    
    if (auth()->user() != null) {
        $user_id = Auth::user()->id;
        $carts = Cart::where('user_id', $user_id)->get();
    } else {
        $temp_user_id = $request->session()->get('temp_user_id');
        $carts = Cart::where('temp_user_id', $temp_user_id)->get();
    }

    return array(
        'cart_count' => count($carts),
        'cart_view' => view('frontend.'.get_setting('homepage_select').'.partials.cart_details', compact('carts'))->render(),
        'nav_cart_view' => view('frontend.'.get_setting('homepage_select').'.partials.cart')->render(),
    );
}

Location: ~/workspace/source/app/Http/Controllers/CartController.php:125-141

Updating Quantity

public function updateQuantity(Request $request)
{
    $cartItem = Cart::findOrFail($request->id);

    if ($cartItem['id'] == $request->id) {
        $product = Product::find($cartItem['product_id']);
        $product_stock = $product->stocks->where('variant', $cartItem['variation'])->first();
        $quantity = $product_stock->qty;
        $price = $product_stock->price;

        // Apply discount
        $discount_applicable = false;
        if ($product->discount_start_date == null) {
            $discount_applicable = true;
        } elseif (strtotime(date('d-m-Y H:i:s')) >= $product->discount_start_date &&
                  strtotime(date('d-m-Y H:i:s')) <= $product->discount_end_date) {
            $discount_applicable = true;
        }

        if ($discount_applicable) {
            if ($product->discount_type == 'percent') {
                $price -= ($price * $product->discount) / 100;
            } elseif ($product->discount_type == 'amount') {
                $price -= $product->discount;
            }
        }

        // Check stock and minimum quantity
        if ($quantity >= $request->quantity) {
            if ($request->quantity >= $product->min_qty) {
                $cartItem['quantity'] = $request->quantity;
            }
        }

        // Apply wholesale pricing
        if ($product->wholesale_product) {
            $wholesalePrice = $product_stock->wholesalePrices
                ->where('min_qty', '<=', $request->quantity)
                ->where('max_qty', '>=', $request->quantity)
                ->first();
            if ($wholesalePrice) {
                $price = $wholesalePrice->price;
            }
        }

        $cartItem['price'] = $price;
        $cartItem->save();
    }

    // Return updated cart view
    if (auth()->user() != null) {
        $user_id = Auth::user()->id;
        $carts = Cart::where('user_id', $user_id)->get();
    } else {
        $temp_user_id = $request->session()->get('temp_user_id');
        $carts = Cart::where('temp_user_id', $temp_user_id)->get();
    }

    return array(
        'cart_count' => count($carts),
        'cart_view' => view('frontend.'.get_setting('homepage_select').'.partials.cart_details', compact('carts'))->render(),
        'nav_cart_view' => view('frontend.'.get_setting('homepage_select').'.partials.cart')->render(),
    );
}

Location: ~/workspace/source/app/Http/Controllers/CartController.php:144-204

Checkout Process

The CheckoutController manages the multi-step checkout flow.

Step 1: Shipping Information

public function get_shipping_info(Request $request)
{
    $carts = Cart::where('user_id', Auth::user()->id)->get();
    
    if ($carts && count($carts) > 0) {
        $categories = Category::all();
        return view('frontend.shipping_info', compact('categories', 'carts'));
    }
    
    flash(translate('Your cart is empty'))->success();
    return back();
}

Location: ~/workspace/source/app/Http/Controllers/CheckoutController.php:102-112

Step 2: Store Shipping Address

public function store_shipping_info(Request $request)
{
    if ($request->address_id == null) {
        flash(translate("Please add shipping address"))->warning();
        return back();
    }

    $carts = Cart::where('user_id', Auth::user()->id)->get();
    if ($carts->isEmpty()) {
        flash(translate('Your cart is empty'))->warning();
        return redirect()->route('home');
    }

    // Attach address to cart items
    foreach ($carts as $key => $cartItem) {
        $cartItem->address_id = $request->address_id;
        $cartItem->save();
    }

    // Load available carriers for shipping zone
    $carrier_list = array();
    if (get_setting('shipping_type') == 'carrier_wise_shipping') {
        $zone = \App\Models\Country::where('id', $carts[0]['address']['country_id'])->first()->zone_id;
        $carrier_query = Carrier::where('status', 1);
        $carrier_query->whereIn('id', function ($query) use ($zone) {
            $query->select('carrier_id')->from('carrier_range_prices')
                ->where('zone_id', $zone);
        })->orWhere('free_shipping', 1);
        $carrier_list = $carrier_query->get();
    }

    return view('frontend.delivery_info', compact('carts', 'carrier_list'));
}

Location: ~/workspace/source/app/Http/Controllers/CheckoutController.php:114-145

Step 3: Store Delivery Information

public function store_delivery_info(Request $request)
{
    $carts = Cart::where('user_id', Auth::user()->id)->get();

    if ($carts->isEmpty()) {
        flash(translate('Your cart is empty'))->warning();
        return redirect()->route('home');
    }

    $shipping_info = Address::where('id', $carts[0]['address_id'])->first();
    $total = 0;
    $tax = 0;
    $shipping = 0;
    $subtotal = 0;

    if ($carts && count($carts) > 0) {
        foreach ($carts as $key => $cartItem) {
            $product = Product::find($cartItem['product_id']);
            $tax += cart_product_tax($cartItem, $product, false) * $cartItem['quantity'];
            $subtotal += cart_product_price($cartItem, $product, false, false) * $cartItem['quantity'];

            // Determine shipping type and cost
            if (get_setting('shipping_type') != 'carrier_wise_shipping' || 
                $request['shipping_type_' . $product->user_id] == 'pickup_point') {
                
                if ($request['shipping_type_' . $product->user_id] == 'pickup_point') {
                    $cartItem['shipping_type'] = 'pickup_point';
                    $cartItem['pickup_point'] = $request['pickup_point_id_' . $product->user_id];
                } else {
                    $cartItem['shipping_type'] = 'home_delivery';
                }
                
                $cartItem['shipping_cost'] = 0;
                if ($cartItem['shipping_type'] == 'home_delivery') {
                    $cartItem['shipping_cost'] = getShippingCost($carts, $key);
                }
            } else {
                $cartItem['shipping_type'] = 'carrier';
                $cartItem['carrier_id'] = $request['carrier_id_' . $product->user_id];
                $cartItem['shipping_cost'] = getShippingCost($carts, $key, $cartItem['carrier_id']);
            }

            $shipping += $cartItem['shipping_cost'];
            $cartItem->save();
        }
        $total = $subtotal + $tax + $shipping;

        return view('frontend.payment_select', compact('carts', 'shipping_info', 'total'));
    } else {
        flash(translate('Your Cart was empty'))->warning();
        return redirect()->route('home');
    }
}

Location: ~/workspace/source/app/Http/Controllers/CheckoutController.php:147-196

Step 4: Payment & Order Creation

public function checkout(Request $request)
{
    if ($request->payment_option == null) {
        flash(translate('There is no payment option is selected.'))->warning();
        return redirect()->route('checkout.shipping_info');
    }
    
    $carts = Cart::where('user_id', Auth::user()->id)->get();
    
    // Minimum order amount check
    if(get_setting('minimum_order_amount_check') == 1){
        $subtotal = 0;
        foreach ($carts as $key => $cartItem){ 
            $product = Product::find($cartItem['product_id']);
            $subtotal += cart_product_price($cartItem, $product, false, false) * $cartItem['quantity'];
        }
        if ($subtotal < get_setting('minimum_order_amount')) {
            flash(translate('You order amount is less than the minimum order amount'))->warning();
            return redirect()->route('home');
        }
    }
    
    // Create order
    (new OrderController)->store($request);

    // Clear cart
    if(count($carts) > 0){
        Cart::where('user_id', Auth::user()->id)->delete();
    }
    
    $request->session()->put('payment_type', 'cart_payment');
    $data['combined_order_id'] = $request->session()->get('combined_order_id');
    $request->session()->put('payment_data', $data);
    
    if ($request->session()->get('combined_order_id') != null) {
        // Route to payment gateway
        $decorator = __NAMESPACE__ . '\\Payment\\' . str_replace(' ', '', ucwords(str_replace('_', ' ', $request->payment_option))) . "Controller";
        if (class_exists($decorator)) {
            return (new $decorator)->pay($request);
        }
        else {
            // Manual payment
            $combined_order = CombinedOrder::findOrFail($request->session()->get('combined_order_id'));
            $manual_payment_data = array(
                'name'   => $request->payment_option,
                'amount' => $combined_order->grand_total,
                'trx_id' => $request->trx_id,
                'photo'  => $request->photo
            );
            foreach ($combined_order->orders as $order) {
                $order->manual_payment = 1;
                $order->manual_payment_data = json_encode($manual_payment_data);
                $order->save();
            }
            flash(translate('Your order has been placed successfully. Please submit payment information from purchase history'))->success();
            return redirect()->route('order_confirmed');
        }
    }
}

Location: ~/workspace/source/app/Http/Controllers/CheckoutController.php:30-83

Coupon System

The checkout process supports multiple coupon types.

Applying Coupons

public function apply_coupon_code(Request $request)
{
    $user = auth()->user();
    $coupon = Coupon::where('code', $request->code)->first();
    $response_message = array();

    // Check welcome coupon
    $couponUser = true;
    if($coupon && $coupon->type == 'welcome_base'){
        $userCoupon = $user->userCoupon;
        if(!$userCoupon){
            $couponUser = false;
        }
    }
    
    if ($coupon != null && $couponUser) {
        // Coupon expiry check
        if($coupon->type != 'welcome_base') {
            $validationDateCheckCondition = strtotime(date('d-m-Y')) >= $coupon->start_date && 
                                           strtotime(date('d-m-Y')) <= $coupon->end_date;
        } else {
            $validationDateCheckCondition = false;
            if($userCoupon){
                $validationDateCheckCondition = $userCoupon->expiry_date >= strtotime(date('d-m-Y H:i:s'));
            }
        }
        
        if ($validationDateCheckCondition) {
            if (CouponUsage::where('user_id', Auth::user()->id)->where('coupon_id', $coupon->id)->first() == null) {
                $coupon_details = json_decode($coupon->details);

                $carts = Cart::where('user_id', Auth::user()->id)
                    ->where('owner_id', $coupon->user_id)
                    ->get();

                $coupon_discount = 0;

                // Cart-based coupon
                if ($coupon->type == 'cart_base' || $coupon->type == 'welcome_base') {
                    $subtotal = 0;
                    $tax = 0;
                    $shipping = 0;
                    foreach ($carts as $key => $cartItem) {
                        $product = Product::find($cartItem['product_id']);
                        $subtotal += cart_product_price($cartItem, $product, false, false) * $cartItem['quantity'];
                        $tax += cart_product_tax($cartItem, $product, false) * $cartItem['quantity'];
                        $shipping += $cartItem['shipping_cost'];
                    }
                    $sum = $subtotal + $tax + $shipping;
                    
                    if ($coupon->type == 'cart_base' && $sum >= $coupon_details->min_buy) {
                        if ($coupon->discount_type == 'percent') {
                            $coupon_discount = ($sum * $coupon->discount) / 100;
                            if ($coupon_discount > $coupon_details->max_discount) {
                                $coupon_discount = $coupon_details->max_discount;
                            }
                        } elseif ($coupon->discount_type == 'amount') {
                            $coupon_discount = $coupon->discount;
                        }
                    } elseif ($coupon->type == 'welcome_base' && $sum >= $userCoupon->min_buy) {
                        $coupon_discount = $userCoupon->discount_type == 'percent' ? 
                            (($sum * $userCoupon->discount) / 100) : $userCoupon->discount;
                    }
                }
                // Product-based coupon
                elseif ($coupon->type == 'product_base') {
                    foreach ($carts as $key => $cartItem) {
                        $product = Product::find($cartItem['product_id']);
                        foreach ($coupon_details as $key => $coupon_detail) {
                            if ($coupon_detail->product_id == $cartItem['product_id']) {
                                if ($coupon->discount_type == 'percent') {
                                    $coupon_discount += (cart_product_price($cartItem, $product, false, false) * 
                                                        $coupon->discount / 100) * $cartItem['quantity'];
                                } elseif ($coupon->discount_type == 'amount') {
                                    $coupon_discount += $coupon->discount * $cartItem['quantity'];
                                }
                            }
                        }
                    }
                }

                if ($coupon_discount > 0) {
                    Cart::where('user_id', Auth::user()->id)
                        ->where('owner_id', $coupon->user_id)
                        ->update([
                            'discount' => $coupon_discount / count($carts),
                            'coupon_code' => $request->code,
                            'coupon_applied' => 1
                        ]);

                    $response_message['response'] = 'success';
                    $response_message['message'] = translate('Coupon has been applied');
                } else {
                    $response_message['response'] = 'warning';
                    $response_message['message'] = translate('This coupon is not applicable to your cart products!');
                }
            } else {
                $response_message['response'] = 'warning';
                $response_message['message'] = translate('You already used this coupon!');
            }
        } else {
            $response_message['response'] = 'warning';
            $response_message['message'] = translate('Coupon expired!');
        }
    } else {
        $response_message['response'] = 'danger';
        $response_message['message'] = translate('Invalid coupon!');
    }

    $carts = Cart::where('user_id', Auth::user()->id)->get();
    $shipping_info = Address::where('id', $carts[0]['address_id'])->first();
    
    $returnHTML = view('frontend.'.get_setting('homepage_select').'.partials.cart_summary', 
                      compact('coupon', 'carts', 'shipping_info'))->render();
    return response()->json(array('response_message' => $response_message, 'html'=>$returnHTML));
}

Location: ~/workspace/source/app/Http/Controllers/CheckoutController.php:198-309

Coupon Types

Cart-Based

Discount on total cart value with minimum purchase requirement

Product-Based

Discount on specific products in the cart

Welcome Coupon

Special coupons for new users with expiry dates

Removing Coupons

public function remove_coupon_code(Request $request)
{
    Cart::where('user_id', Auth::user()->id)
        ->update([
            'discount' => 0.00,
            'coupon_code' => '',
            'coupon_applied' => 0
        ]);

    $coupon = Coupon::where('code', $request->code)->first();
    $carts = Cart::where('user_id', Auth::user()->id)->get();
    $shipping_info = Address::where('id', $carts[0]['address_id'])->first();

    return view('frontend.'.get_setting('homepage_select').'.partials.cart_summary', 
               compact('coupon', 'carts', 'shipping_info'));
}

Location: ~/workspace/source/app/Http/Controllers/CheckoutController.php:311-329

Checkout Features

Guest Checkout

Temporary cart for non-logged users

Cart Merging

Merge guest cart on login

Multiple Shipping

Home delivery, pickup points, carriers

Dynamic Pricing

Real-time tax and shipping calculation

Minimum Order

Configurable minimum order amount

Club Points

Loyalty points redemption

Order Confirmation

public function order_confirmed()
{
    $combined_order = CombinedOrder::findOrFail(Session::get('combined_order_id'));

    Cart::where('user_id', $combined_order->user_id)->delete();

    return view('frontend.order_confirmed', compact('combined_order'));
}

Location: ~/workspace/source/app/Http/Controllers/CheckoutController.php:353-368

Checkout Flow Summary

Add to Cart - Select product variants and quantities
View Cart - Review items, update quantities, apply coupons
Shipping Info - Select or add delivery address
Delivery Options - Choose shipping method (home/pickup/carrier)
Payment Selection - Select payment gateway or manual payment
Order Creation - Generate orders, reduce stock, apply discounts
Payment Processing - Process payment through gateway
Order Confirmation - Display order details and confirmation

Order Management

Learn how orders are processed after checkout

Product Management

Understand product variants and pricing

Core Features

Marketing

Multi-Vendor

Advanced

​Overview

Guest & User Carts

Dynamic Pricing

Coupon System

Multi-Step Checkout

​Cart Model

​Cart Structure

​Cart Fields

​Cart Management

​Viewing Cart

​Adding to Cart

​Cart Validations

Minimum Quantity

Stock Availability

Auction Products

Duplicate Prevention

​Removing from Cart

​Updating Quantity

​Checkout Process

​Step 1: Shipping Information

​Step 2: Store Shipping Address

​Step 3: Store Delivery Information

​Step 4: Payment & Order Creation

​Coupon System

​Applying Coupons

​Coupon Types

Cart-Based

Product-Based

Welcome Coupon

​Removing Coupons

​Checkout Features

Guest Checkout

Cart Merging

Multiple Shipping

Dynamic Pricing

Minimum Order

Club Points

​Order Confirmation

​Checkout Flow Summary

​Related Resources

Order Management

Product Management

Build docs developers (and LLMs) love

Overview

Cart Model

Cart Structure

Cart Fields

Cart Management

Viewing Cart

Adding to Cart

Cart Validations

Removing from Cart

Updating Quantity

Checkout Process

Step 1: Shipping Information

Step 2: Store Shipping Address

Step 3: Store Delivery Information

Step 4: Payment & Order Creation

Coupon System

Applying Coupons

Coupon Types

Removing Coupons

Checkout Features

Order Confirmation

Checkout Flow Summary

Related Resources