warehouse/app/Http/Controllers/Items/ShowAdjustStockFormController.php

<?php

namespace App\Http\Controllers\Items;

use App\Models\Item;
use App\Models\Location;
use App\Models\Stock;
use Framework\Routing\Router;

class ShowAdjustStockFormController
{
    public function handle(Router $router)
    {
        if (!session()->has('user_id')) {
            return redirect($router->route('show-register-form'));
        }

        $parameters = $router->current()->parameters();

        $item = Item::find((int) $parameters['item']);

        if (!$item) {
            return redirect($router->route('show-items'));
        }

        $stock = Stock::where('item_id', $item->id)->all();
        $quantitiesByLocation = [];

        foreach ($stock as $row) {
            $quantitiesByLocation[$row->location_id] = $row->quantity;
        }

        return view('items/adjust', [
            'item' => $item,
            'locations' => Location::all(),
            'quantitiesByLocation' => $quantitiesByLocation,
            'adjustAction' => $router->route('adjust-stock', ['item' => $item->id]),
            'csrf' => csrf(),
        ]);
    }
}