kulakpos_web/Modules/Business/App/Exports/ExportBalanceSheet.php

<?php

namespace Modules\Business\App\Exports;

use App\Models\PaymentType;
use App\Models\Product;
use App\Traits\DateFilterTrait;
use Illuminate\Contracts\View\View;
use Maatwebsite\Excel\Concerns\FromView;

class ExportBalanceSheet implements FromView
{
    use DateFilterTrait;

    public function view(): View
    {
        $businessId = auth()->user()->business_id;
        $duration   = request('custom_days') ? : 'today';
        $fromDate   = request('from_date');
        $toDate     = request('to_date');
        $perPage    = request('per_page') ?? 20;

        $productQuery = Product::select('id', 'business_id', 'productName', 'product_type', 'created_at')
            ->with(['stocks:id,business_id,product_id,productStock,productPurchasePrice', 'combo_products.stock'])
            ->where('business_id', $businessId);
        $this->applyDateFilter($productQuery, $duration, 'created_at', $fromDate, $toDate);
        $products = $productQuery->get()
            ->map(function ($item) {
                $item->source = 'product';
                return $item;
            });

        $bankQuery = PaymentType::where('business_id', $businessId);
        $this->applyDateFilter($bankQuery, $duration, 'opening_date', $fromDate, $toDate);
        $banks = $bankQuery->get()
            ->map(function ($item) {
                $item->source = 'bank';
                return $item;
            });

        $asset_datas = $products->merge($banks)->take($perPage);

        $total_stock_value = 0;
        foreach ($products as $product) {
            if (in_array($product->product_type, ['single', 'variant'])) {
                foreach ($product->stocks as $stock) {
                    $total_stock_value += $stock->productStock * $stock->productPurchasePrice;
                }
            }

            if ($product->product_type === 'combo') {
                foreach ($product->combo_products as $combo) {
                    $childStock = $combo->stock;
                    if ($childStock) {
                        $total_stock_value += ($childStock->productStock / $combo->quantity) * $combo->purchase_price;
                    }
                }
            }
        }

        $totalBankBalance = $banks->sum('balance');
        $total_asset      = $total_stock_value + $totalBankBalance;

        return view('business::balance-sheets.excel-csv', compact('asset_datas', 'total_asset'));
    }
}