<?php
declare(strict_types=1);
/*
* This file is part of the league/commonmark package.
*
* (c) Colin O'Dell <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\CommonMark\Extension\Mention\Generator;
use League\CommonMark\Exception\LogicException;
use League\CommonMark\Extension\Mention\Mention;
use League\CommonMark\Node\Inline\AbstractInline;
final class CallbackGenerator implements MentionGeneratorInterface
{
/**
* A callback function which sets the URL on the passed mention and returns the mention, return a new AbstractInline based object or null if the mention is not a match
*
* @var callable(Mention): ?AbstractInline
*/
private $callback;
public function __construct(callable $callback)
{
$this->callback = $callback;
}
/**
* @throws LogicException
*/
public function generateMention(Mention $mention): ?AbstractInline
{
$result = \call_user_func($this->callback, $mention);
if ($result === null) {
return null;
}
if ($result instanceof AbstractInline && ! ($result instanceof Mention)) {
return $result;
}
if ($result instanceof Mention && $result->hasUrl()) {
return $mention;
}
throw new LogicException('CallbackGenerator callable must set the URL on the passed mention and return the mention, return a new AbstractInline based object or null if the mention is not a match');
}
}