SpecialMobileDiff.php
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SpecialMobileDiff.php
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	<?php

	use MediaWiki\Html\Html;
	use MediaWiki\SpecialPage\UnlistedSpecialPage;

	/**
	* Show the difference between two revisions of a page
	*/
	class SpecialMobileDiff extends UnlistedSpecialPage {
	public function __construct() {
	parent::__construct( 'MobileDiff' );
	}

	/**
	* Get the URL for Desktop version of difference view
	* @param string\|null $subPage URL of mobile diff page
	* @return string\|null Url to mobile diff page
	*/
	public function getDesktopUrl( $subPage ) {
	if ( $subPage === null ) {
	return null;
	}
	$parts = explode( '...', $subPage );
	if ( count( $parts ) > 1 ) {
	$params = [ 'diff' => $parts[1], 'oldid' => $parts[0] ];
	} else {
	$params = [ 'diff' => $parts[0] ];
	}
	if ( $this->getRequest()->getVal( 'unhide' ) ) {
	$params['unhide'] = 1;
	}
	return wfAppendQuery( wfScript(), $params );
	}

	/**
	* @inheritDoc
	*/
	public function execute( $subPage ) {
	$out = $this->getOutput();
	if ( !$subPage ) {
	$out->setStatusCode( 404 );
	$out->addHTML(
	Html::errorBox(
	$out->msg( 'mobile-frontend-generic-404-title' )->parse(),
	$out->msg( 'mobile-frontend-generic-404-desc' )->text()
	)
	);

	return;
	}
	$out->redirect( $this->getDesktopUrl( $subPage ), '301' );
	}
	}