opensourcepos/app/Models/Tokens/Token_customer.php

<?php

namespace App\Models\Tokens;

use App\Libraries\Sale_lib;
use App\Models\Customer;

/**
 * Token_customer class
 */
class Token_customer extends Token
{
    private array $customer_info;
    private Sale_lib $sale_lib;

    /**
     * @param string $customer_info
     */
    public function __construct(array $customer_info = [])
    {
        parent::__construct();
        $this->customer_info = $customer_info;
        $this->sale_lib      = new Sale_lib();
    }

    public function token_id(): string
    {
        return 'CU';
    }

    public function get_value(): string
    {
        // Substitute customer info
        $customer_id = $this->sale_lib->get_customer();
        if ($customer_id !== NEW_ITEM && empty($this->customer_info)) {
            $customer      = model(Customer::class);
            $customer_info = $customer->get_info($customer_id);

            if ($customer_info !== '') {
                return trim($customer_info->first_name . ' ' . $customer_info->last_name);
            }
        }

        return '';
    }
}