departmentdatafilter.php

<?php
namespace Bitrix\Im\Integration\UI\EntitySelector;
 
use Bitrix\UI\EntitySelector\BaseFilter;
use Bitrix\UI\EntitySelector\Dialog;
use Bitrix\UI\EntitySelector\Item;
 
class DepartmentDataFilter extends BaseFilter
{
    public function __construct()
    {
        parent::__construct();
    }
 
    public function isAvailable(): bool
    {
        return $GLOBALS['USER']->isAuthorized();
    }
 
    public function apply(array $items, Dialog $dialog): void
    {
        foreach ($items as $item)
        {
            if (!($item instanceof Item))
            {
                continue;
            }
 
            $itemColor = \Bitrix\Im\Color::getColorByNumber($item->getId());
            $item->setAvatarOptions(['color' => $itemColor]);
        }
    }
}