expense/app/Helpers/BudgetHelper.php

<?php

namespace App\Helpers;

use GuzzleHttp\Client;
use GuzzleHttp\Exception\RequestException;
use Illuminate\Support\Str;
use App\Models\BudgetControl;
use App\Models\FormUpCountry;
use App\Models\FormMeetingSeminar;
use App\Models\FormOthers;
use App\Models\FormEntertaimentPresentation;
use App\Models\FormVehicleRunningCost;
use App\Helpers\FormHelper;
use App\Models\UserHasCabang;

class BudgetHelper
{
    public static function getAvailableBudget($cabang_id)
    {
        // Get the budget control data
		$budget = BudgetControl::where('cabang_id', $cabang_id)->orderBy('created_at', 'desc')->with(['user', 'cabang'])->get();

		// Initialize an empty array to hold the used budget sums
		$usedBudget = 0;

		foreach ($budget as $b) {
			// Get the month and year from the budget
			$month = $b->periode_month;
			$year = $b->periode_year;

			// Add the used budget per model for the specified month and year to the usedBudget array
			$users = UserHasCabang::where('cabang_id', $cabang_id)->get();
            $userIds = $users->pluck('user_id')->toArray();
			$forms = FormHelper::getFormsByUserIds($userIds, $month, $year)->sortByDesc('tanggal')->sortByDesc('created_at');
			$usedBudget += $forms->sum('approved_total');
		}

		$availableBudget = $budget->sum('amount') - $usedBudget;

		return $availableBudget;
    }
}