akaunting/app/Models/Income/InvoiceStatus.php

<?php

namespace App\Models\Income;

use App\Abstracts\Model;

class InvoiceStatus extends Model
{

    protected $table = 'invoice_statuses';

    /**
     * The accessors to append to the model's array form.
     *
     * @var array
     */
    protected $appends = ['label'];

    /**
     * Attributes that should be mass-assignable.
     *
     * @var array
     */
    protected $fillable = ['company_id', 'name', 'code'];

    /**
     * Get the status label.
     *
     * @return string
     */
    public function getLabelAttribute()
    {
        switch ($this->code) {
            case 'paid':
                $label = 'success';
                break;
            case 'delete':
                $label = 'danger';
                break;
            case 'partial':
            case 'sent':
                $label = 'warning';
                break;
            default:
                $label = 'info';
                break;
        }

        return $label;
    }
}