SpecialGoToComment.php
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SpecialGoToComment.php
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	<?php

	namespace MediaWiki\Extension\DiscussionTools;

	use MediaWiki\SpecialPage\RedirectSpecialPage;
	use MediaWiki\SpecialPage\SpecialPage;
	use MediaWiki\Title\Title;

	class SpecialGoToComment extends RedirectSpecialPage {

	private ThreadItemStore $threadItemStore;

	public function __construct(
	ThreadItemStore $threadItemStore
	) {
	parent::__construct( 'GoToComment' );
	$this->threadItemStore = $threadItemStore;
	}

	/**
	* @inheritDoc
	*/
	public function getRedirect( $subpage ) {
	$results = [];

	// Search for all thread items with the given ID or name, returning results from the latest
	// revision of each page they appeared on.
	//
	// If there is exactly one good result (see isCanonicalPermalink()), redirect to it.
	// Otherwise, redirect to full search results on Special:FindComment.

	if ( $subpage ) {
	$threadItems = $this->threadItemStore->findNewestRevisionsById( $subpage );
	foreach ( $threadItems as $item ) {
	if ( $item->isCanonicalPermalink() ) {
	$results[] = $item;
	}
	}
	$threadItems = $this->threadItemStore->findNewestRevisionsByName( $subpage );
	foreach ( $threadItems as $item ) {
	if ( $item->isCanonicalPermalink() ) {
	$results[] = $item;
	}
	}
	}

	if ( count( $results ) === 1 ) {
	return Title::castFromPageIdentity( $results[0]->getPage() )->createFragmentTarget( $results[0]->getId() );
	} else {
	return SpecialPage::getTitleFor( 'FindComment', $subpage ?: false );
	}
	}
	}