Letter.php

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<?php declare(strict_types=1);

namespace ILIAS\UI\Implementation\Component\Symbol\Avatar;

use ILIAS\UI\Component as C;
use ILIAS\UI\Implementation\Component\Symbol\Avatar\Avatar;

class Letter extends Avatar implements C\Symbol\Avatar\Letter
{
    public function getAbbreviation() : string
    {
        return (substr($this->getUsername(), 0, 2));
    }

    public function getBackgroundColorVariant() : int
    {
        return (crc32($this->getUsername()) % 26) + 1;
    }
}