SpecialCheckUser.php
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SpecialCheckUser.php
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	<?php

	namespace MediaWiki\CheckUser\CheckUser;

	use MediaWiki\Block\DatabaseBlockStore;
	use MediaWiki\Cache\LinkBatchFactory;
	use MediaWiki\CheckUser\CheckUser\Pagers\AbstractCheckUserPager;
	use MediaWiki\CheckUser\CheckUser\Pagers\CheckUserGetActionsPager;
	use MediaWiki\CheckUser\CheckUser\Pagers\CheckUserGetIPsPager;
	use MediaWiki\CheckUser\CheckUser\Pagers\CheckUserGetUsersPager;
	use MediaWiki\CheckUser\CheckUser\Widgets\CIDRCalculator;
	use MediaWiki\CheckUser\Hook\HookRunner;
	use MediaWiki\CheckUser\Services\CheckUserLogService;
	use MediaWiki\CheckUser\Services\CheckUserLookupUtils;
	use MediaWiki\CheckUser\Services\CheckUserUtilityService;
	use MediaWiki\CheckUser\Services\TokenQueryManager;
	use MediaWiki\CheckUser\Services\UserAgentClientHintsFormatter;
	use MediaWiki\CheckUser\Services\UserAgentClientHintsLookup;
	use MediaWiki\CommentFormatter\CommentFormatter;
	use MediaWiki\CommentStore\CommentStore;
	use MediaWiki\Exception\UserBlockedError;
	use MediaWiki\Html\FormOptions;
	use MediaWiki\Html\Html;
	use MediaWiki\HTMLForm\HTMLForm;
	use MediaWiki\Logging\LogFormatterFactory;
	use MediaWiki\Message\Message;
	use MediaWiki\Permissions\PermissionManager;
	use MediaWiki\SpecialPage\SpecialPage;
	use MediaWiki\Title\Title;
	use MediaWiki\User\CentralId\CentralIdLookup;
	use MediaWiki\User\CentralId\CentralIdLookupFactory;
	use MediaWiki\User\Options\UserOptionsLookup;
	use MediaWiki\User\TempUser\TempUserConfig;
	use MediaWiki\User\UserEditTracker;
	use MediaWiki\User\UserFactory;
	use MediaWiki\User\UserGroupManager;
	use MediaWiki\User\UserIdentity;
	use MediaWiki\User\UserIdentityLookup;
	use MediaWiki\User\UserIdentityValue;
	use MediaWiki\User\UserNamePrefixSearch;
	use MediaWiki\User\UserNameUtils;
	use OOUI\IconWidget;
	use Wikimedia\IPUtils;
	use Wikimedia\Rdbms\IConnectionProvider;

	class SpecialCheckUser extends SpecialPage {
	/**
	* The possible subtypes represented as constants.
	* The constants represent the old string values
	* for backwards compatibility.
	*/
	public const SUBTYPE_GET_IPS = 'subuserips';

	public const SUBTYPE_GET_ACTIONS = 'subactions';

	public const SUBTYPE_GET_USERS = 'subipusers';

	/**
	* @var FormOptions the form parameters.
	*/
	protected $opts;

	private LinkBatchFactory $linkBatchFactory;
	private UserGroupManager $userGroupManager;
	private CentralIdLookup $centralIdLookup;
	private PermissionManager $permissionManager;
	private UserIdentityLookup $userIdentityLookup;
	private TokenQueryManager $tokenQueryManager;
	private IConnectionProvider $dbProvider;
	private UserFactory $userFactory;
	private CheckUserLogService $checkUserLogService;
	private CommentFormatter $commentFormatter;
	private UserEditTracker $userEditTracker;
	private UserNamePrefixSearch $userNamePrefixSearch;
	private UserNameUtils $userNameUtils;
	private HookRunner $hookRunner;
	private CheckUserUtilityService $checkUserUtilityService;
	private CommentStore $commentStore;
	private UserAgentClientHintsLookup $clientHintsLookup;
	private UserAgentClientHintsFormatter $clientHintsFormatter;
	private CheckUserLookupUtils $checkUserLookupUtils;
	private LogFormatterFactory $logFormatterFactory;
	private UserOptionsLookup $userOptionsLookup;
	private DatabaseBlockStore $blockStore;
	private TempUserConfig $tempUserConfig;

	public function __construct(
	LinkBatchFactory $linkBatchFactory,
	UserGroupManager $userGroupManager,
	CentralIdLookupFactory $centralIdLookupFactory,
	PermissionManager $permissionManager,
	UserIdentityLookup $userIdentityLookup,
	TokenQueryManager $tokenQueryManager,
	IConnectionProvider $dbProvider,
	UserFactory $userFactory,
	CheckUserLogService $checkUserLogService,
	CommentFormatter $commentFormatter,
	UserEditTracker $userEditTracker,
	UserNamePrefixSearch $userNamePrefixSearch,
	UserNameUtils $userNameUtils,
	HookRunner $hookRunner,
	CheckUserUtilityService $checkUserUtilityService,
	CommentStore $commentStore,
	UserAgentClientHintsLookup $clientHintsLookup,
	UserAgentClientHintsFormatter $clientHintsFormatter,
	CheckUserLookupUtils $checkUserLookupUtils,
	LogFormatterFactory $logFormatterFactory,
	UserOptionsLookup $userOptionsLookup,
	DatabaseBlockStore $blockStore,
	TempUserConfig $tempUserConfig
	) {
	parent::__construct( 'CheckUser', 'checkuser' );

	$this->linkBatchFactory = $linkBatchFactory;
	$this->userGroupManager = $userGroupManager;
	$this->centralIdLookup = $centralIdLookupFactory->getLookup();
	$this->permissionManager = $permissionManager;
	$this->userIdentityLookup = $userIdentityLookup;
	$this->tokenQueryManager = $tokenQueryManager;
	$this->dbProvider = $dbProvider;
	$this->userFactory = $userFactory;
	$this->checkUserLogService = $checkUserLogService;
	$this->commentFormatter = $commentFormatter;
	$this->userEditTracker = $userEditTracker;
	$this->userNamePrefixSearch = $userNamePrefixSearch;
	$this->userNameUtils = $userNameUtils;
	$this->hookRunner = $hookRunner;
	$this->checkUserUtilityService = $checkUserUtilityService;
	$this->commentStore = $commentStore;
	$this->clientHintsLookup = $clientHintsLookup;
	$this->clientHintsFormatter = $clientHintsFormatter;
	$this->checkUserLookupUtils = $checkUserLookupUtils;
	$this->logFormatterFactory = $logFormatterFactory;
	$this->userOptionsLookup = $userOptionsLookup;
	$this->blockStore = $blockStore;
	$this->tempUserConfig = $tempUserConfig;
	}

	/** @inheritDoc */
	public function doesWrites() {
	// logging
	return true;
	}

	/** @inheritDoc */
	public function execute( $subPage ) {
	$this->setHeaders();
	$this->addHelpLink( 'Help:Extension:CheckUser' );
	$this->checkPermissions();
	// Logging and blocking requires writing so stop from here if read-only mode
	$this->checkReadOnly();

	// Blocked users are not allowed to run checkuser queries (bug T157883)
	$block = $this->getUser()->getBlock();
	if ( $block && $block->isSitewide() ) {
	throw new UserBlockedError( $block );
	}

	$request = $this->getRequest();

	$opts = new FormOptions();
	$opts->add( 'reason', '' );
	$opts->add( 'checktype', '' );
	$opts->add( 'period', 0 );
	$opts->add( 'offset', '' );
	$opts->add( 'limit', 0 );
	$opts->add( 'dir', '' );
	$opts->add( 'token', '' );
	foreach ( AbstractCheckUserPager::FILTER_FIELDS as $field => $default ) {
	$opts->add( $field, $default );
	}
	$opts->fetchValuesFromRequest( $request );

	// If the client has provided a token, they are trying to paginate.
	// If the token is valid, then use the values from this and later
	// don't log this as a new check.
	$tokenData = $this->tokenQueryManager->getDataFromRequest( $this->getRequest() );
	$validatedRequest = $this->getRequest();
	$user = '';
	if ( $tokenData ) {
	foreach (
	array_diff( AbstractCheckUserPager::TOKEN_MANAGED_FIELDS, array_keys( $tokenData ) ) as $key
	) {
	$opts->reset( $key );
	$validatedRequest->unsetVal( $key );
	}
	foreach ( $tokenData as $key => $value ) {
	// Update the FormOptions
	if ( $key === 'user' ) {
	$user = $value;
	} else {
	$opts->setValue( $key, $value, true );
	}
	// Update the actual request so that IndexPager.php reads the validated values.
	// (used for dir, offset and limit)
	$validatedRequest->setVal( $key, $value );
	}
	} else {
	$user = trim(
	$request->getText( 'user', $request->getText( 'ip', $subPage ?? '' ) )
	);
	}
	$this->getContext()->setRequest( $validatedRequest );
	$this->opts = $opts;

	// Normalise 'user' parameter and ignore if not valid (T217713)
	// It must be valid when making a link to Special:CheckUserLog/<user>.
	$userTitle = Title::makeTitleSafe( NS_USER, $user );
	$user = $userTitle ? $userTitle->getText() : '';

	$out = $this->getOutput();
	$links = [];
	$out->enableOOUI();
	$out->addModuleStyles( 'oojs-ui.styles.icons-interactions' );
	$icon = new IconWidget( [ 'icon' => 'lightbulb' ] );
	$investigateLink = $this->getLinkRenderer()->makeKnownLink(
	SpecialPage::getTitleFor( 'Investigate' ),
	$this->msg( 'checkuser-link-investigate-label' )->text()
	);
	$out->setIndicators( [ 'investigate-link' => $icon . $investigateLink ] );
	$query = [];
	if ( $user !== '' ) {
	$query['targets'] = $user;
	}
	$links[] = Html::rawElement(
	'span',
	[],
	$this->getLinkRenderer()->makeKnownLink(
	SpecialPage::getTitleFor( 'Investigate' ),
	$this->msg( $user ? 'checkuser-investigate-this-user' : 'checkuser-show-investigate' )->text(),
	[],
	$query
	)
	);
	if ( $this->permissionManager->userHasRight( $this->getUser(), 'checkuser-log' ) ) {
	$links[] = Html::rawElement(
	'span',
	[],
	$this->getLinkRenderer()->makeKnownLink(
	SpecialPage::getTitleFor( 'CheckUserLog' ),
	$this->msg( 'checkuser-showlog' )->text()
	)
	);
	if ( $user !== '' ) {
	$links[] = Html::rawElement(
	'span',
	[],
	$this->getLinkRenderer()->makeKnownLink(
	SpecialPage::getTitleFor( 'CheckUserLog', $user ),
	$this->msg( 'checkuser-recent-checks' )->text()
	)
	);
	}
	}
	if (
	$this->getConfig()->get( 'CheckUserSuggestedInvestigationsEnabled' ) &&
	!$this->getConfig()->get( 'CheckUserSuggestedInvestigationsHidden' )
	) {
	$links[] = Html::rawElement(
	'span',
	[],
	$this->getLinkRenderer()->makeKnownLink(
	SpecialPage::getTitleFor( 'SuggestedInvestigations' ),
	$this->msg( 'checkuser-show-suggestedinvestigations' )->text()
	)
	);
	}

	if ( count( $links ) ) {
	$out->addSubtitle( Html::rawElement(
	'span',
	[ 'class' => 'mw-checkuser-links-no-parentheses' ],
	Html::openElement( 'span' ) .
	implode(
	Html::closeElement( 'span' ) . Html::openElement( 'span' ),
	$links
	) .
	Html::closeElement( 'span' )
	) );
	}

	$userIdentity = null;
	$isIP = false;
	$xfor = false;
	$m = [];
	if ( IPUtils::isIPAddress( $user ) ) {
	// A single IP address or an IP range
	$userIdentity = UserIdentityValue::newAnonymous( IPUtils::sanitizeIP( $user ) );
	$isIP = true;
	} elseif ( preg_match( '/^(.+)\/xff$/', $user, $m ) && IPUtils::isIPAddress( $m[1] ) ) {
	// A single IP address or range with XFF string included
	$userIdentity = UserIdentityValue::newAnonymous( IPUtils::sanitizeIP( $m[1] ) );
	$xfor = true;
	$isIP = true;
	} else {
	// A user?
	if ( $user ) {
	$userIdentity = $this->userIdentityLookup->getUserIdentityByName( $user );
	}
	}

	$this->showIntroductoryText();
	$this->showForm( $user, $isIP );

	// Perform one of the various submit operations...
	if ( $request->wasPosted() ) {
	$checkType = $this->opts->getValue( 'checktype' );
	if ( !$this->getContext()->getCsrfTokenSet()->matchTokenField() ) {
	$out->wrapWikiMsg( '<div class="error">$1</div>', 'checkuser-token-fail' );
	} elseif ( !$this->checkReason() ) {
	$out->addWikiMsg( 'checkuser-noreason' );
	} elseif ( $checkType == self::SUBTYPE_GET_IPS ) {
	if ( $isIP \|\| !$user ) {
	$out->addWikiMsg( 'nouserspecified' );
	} elseif ( !$userIdentity \|\| !$userIdentity->getId() ) {
	$out->addWikiMsg( 'nosuchusershort', $user );
	} else {
	$pager = $this->getPager( self::SUBTYPE_GET_IPS, $userIdentity, 'userips' );
	$out->addHtml( $pager->getBody() );
	}
	} elseif ( $checkType == self::SUBTYPE_GET_ACTIONS ) {
	if ( $isIP && $userIdentity ) {
	// Target is a IP or range
	if ( !$this->checkUserLookupUtils->isValidIPOrRange( $userIdentity->getName() ) ) {
	$out->addWikiMsg( 'checkuser-range-outside-limit', $userIdentity->getName() );
	} else {
	$logType = $xfor ? 'ipedits-xff' : 'ipedits';

	// Ordered in descent by timestamp. Can cause large filesorts on range scans.
	$pager = $this->getPager( self::SUBTYPE_GET_ACTIONS, $userIdentity, $logType, $xfor );
	$out->addHTML( $pager->getBody() );
	}
	} else {
	// Target is a username
	if ( !$user ) {
	$out->addWikiMsg( 'nouserspecified' );
	} elseif ( !$userIdentity \|\| !$userIdentity->getId() ) {
	$out->addHTML( $this->msg( 'nosuchusershort', $user )->parseAsBlock() );
	} else {
	// Sorting might take some time
	// phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
	@set_time_limit( 60 );

	$pager = $this->getPager( self::SUBTYPE_GET_ACTIONS, $userIdentity, 'useredits' );
	$out->addHTML( $pager->getBody() );
	}
	}
	} elseif ( $checkType == self::SUBTYPE_GET_USERS ) {
	if ( !$isIP \|\| !$userIdentity ) {
	$out->addWikiMsg( 'badipaddress' );
	} elseif ( !$this->checkUserLookupUtils->isValidIPOrRange( $userIdentity->getName() ) ) {
	$out->addWikiMsg( 'checkuser-range-outside-limit', $userIdentity->getName() );
	} else {
	$logType = $xfor ? 'ipusers-xff' : 'ipusers';

	$pager = $this->getPager( self::SUBTYPE_GET_USERS, $userIdentity, $logType, $xfor );
	$out->addHTML( $pager->getBody() );
	}
	}
	}
	// Add CIDR calculation convenience JS form
	$this->addJsCIDRForm();
	$out->addModules( 'ext.checkUser' );
	$out->addModuleStyles( [
	'mediawiki.interface.helpers.styles',
	'ext.checkUser.styles',
	] );
	}

	protected function showIntroductoryText() {
	$config = $this->getConfig();
	$cidrLimit = $config->get( 'CheckUserCIDRLimit' );
	$maximumRowCount = $config->get( 'CheckUserMaximumRowCount' );
	$this->getOutput()->addWikiMsg(
	'checkuser-summary',
	$cidrLimit['IPv4'],
	$cidrLimit['IPv6'],
	Message::numParam( $maximumRowCount )
	);
	}

	/**
	* Show the CheckUser query form
	*
	* @param string $user
	* @param bool $isIP
	*/
	protected function showForm( string $user, bool $isIP ) {
	// Fill in requested type if it makes sense
	$ipAllowed = true;
	$checktype = $this->opts->getValue( 'checktype' );
	if ( $checktype == self::SUBTYPE_GET_USERS && $isIP ) {
	$checkTypeValidated = $checktype;
	$ipAllowed = false;
	} elseif ( $checktype == self::SUBTYPE_GET_IPS && !$isIP ) {
	$checkTypeValidated = $checktype;
	} elseif ( $checktype == self::SUBTYPE_GET_ACTIONS ) {
	$checkTypeValidated = $checktype;
	// Defaults otherwise
	} elseif ( $isIP ) {
	$checkTypeValidated = self::SUBTYPE_GET_ACTIONS;
	} else {
	$checkTypeValidated = self::SUBTYPE_GET_IPS;
	$ipAllowed = false;
	}

	$fields = [
	'target' => [
	'type' => 'user',
	// validation in execute() currently
	'exists' => false,
	'ipallowed' => $ipAllowed,
	'iprange' => $ipAllowed,
	'name' => 'user',
	'label-message' => 'checkuser-target',
	'default' => $user,
	'id' => 'checktarget',
	],
	'radiooptions' => [
	'type' => 'radio',
	'options-messages' => [
	'checkuser-ips' => self::SUBTYPE_GET_IPS,
	'checkuser-actions' => self::SUBTYPE_GET_ACTIONS,
	'checkuser-users' => self::SUBTYPE_GET_USERS,
	],
	'id' => 'checkuserradios',
	'default' => $checkTypeValidated,
	'name' => 'checktype',
	'nodata' => 'yes',
	'flatlist' => true,
	],
	'period' => [
	'type' => 'select',
	'id' => 'period',
	'label-message' => 'checkuser-period',
	'options-messages' => [
	'checkuser-week-1' => 7,
	'checkuser-week-2' => 14,
	'checkuser-month' => 30,
	'checkuser-month-2' => 60,
	'checkuser-all' => 0,
	],
	'default' => $this->opts->getValue( 'period' ),
	'name' => 'period',
	],
	'reason' => [
	'type' => 'text',
	'default' => $this->opts->getValue( 'reason' ),
	'label-message' => 'checkuser-reason',
	'size' => 46,
	'maxlength' => 150,
	'id' => 'checkreason',
	'name' => 'reason',
	],
	// Persist the "Hide temporary accounts" filter when changing things like the check type or period
	// in the main search form
	'HideTemporaryAccounts' => [
	'type' => 'hidden',
	'default' => $this->opts->getValue( 'wpHideTemporaryAccounts' ),
	],
	];

	$form = HTMLForm::factory( 'ooui', $fields, $this->getContext() );
	$form->setMethod( 'post' )
	->setWrapperLegendMsg( 'checkuser-query' )
	->setSubmitTextMsg( 'checkuser-check' )
	->setId( 'checkuserform' )
	->setSubmitId( 'checkusersubmit' )
	->setSubmitName( 'checkusersubmit' )
	->prepareForm()
	->displayForm( false );
	}

	/**
	* Make a quick JS form for admins to calculate block ranges
	*/
	protected function addJsCIDRForm() {
	$out = $this->getOutput();
	$out->addHTML( ( new CIDRCalculator( $out ) )->getHtml() );
	}

	/**
	* @return bool
	*/
	protected function checkReason(): bool {
	return ( !$this->getConfig()->get( 'CheckUserForceSummary' ) \|\| strlen( $this->opts->getValue( 'reason' ) ) );
	}

	/**
	* Gets the pager for the specific check type.
	* Returns null if the checktype is not recognised.
	*
	* @param string $checkType
	* @param UserIdentity $userIdentity
	* @param string $logType
	* @param bool\|null $xfor
	* @return AbstractCheckUserPager\|null
	*/
	public function getPager( string $checkType, UserIdentity $userIdentity, string $logType, ?bool $xfor = null ) {
	return match ( $checkType ) {
	self::SUBTYPE_GET_IPS => new CheckUserGetIPsPager(
	$this->opts,
	$userIdentity,
	$logType,
	$this->tokenQueryManager,
	$this->userGroupManager,
	$this->centralIdLookup,
	$this->dbProvider,
	$this->getSpecialPageFactory(),
	$this->userIdentityLookup,
	$this->checkUserLogService,
	$this->userFactory,
	$this->checkUserLookupUtils,
	$this->userOptionsLookup,
	$this->blockStore,
	$this->tempUserConfig
	),
	self::SUBTYPE_GET_USERS => new CheckUserGetUsersPager(
	$this->opts,
	$userIdentity,
	$xfor ?? false,
	$logType,
	$this->tokenQueryManager,
	$this->permissionManager,
	$this->userGroupManager,
	$this->centralIdLookup,
	$this->dbProvider,
	$this->getSpecialPageFactory(),
	$this->userIdentityLookup,
	$this->userFactory,
	$this->checkUserLogService,
	$this->checkUserLookupUtils,
	$this->userEditTracker,
	$this->checkUserUtilityService,
	$this->clientHintsLookup,
	$this->clientHintsFormatter,
	$this->userOptionsLookup,
	$this->blockStore,
	$this->linkBatchFactory,
	$this->tempUserConfig
	),
	self::SUBTYPE_GET_ACTIONS => new CheckUserGetActionsPager(
	$this->opts,
	$userIdentity,
	$xfor,
	$logType,
	$this->tokenQueryManager,
	$this->userGroupManager,
	$this->centralIdLookup,
	$this->linkBatchFactory,
	$this->dbProvider,
	$this->getSpecialPageFactory(),
	$this->userIdentityLookup,
	$this->userFactory,
	$this->checkUserLookupUtils,
	$this->checkUserLogService,
	$this->commentFormatter,
	$this->userEditTracker,
	$this->hookRunner,
	$this->checkUserUtilityService,
	$this->commentStore,
	$this->clientHintsLookup,
	$this->clientHintsFormatter,
	$this->logFormatterFactory,
	$this->userOptionsLookup,
	$this->blockStore,
	$this->tempUserConfig
	),
	default => null
	};
	}

	/**
	* Return an array of subpages beginning with $search that this special page will accept.
	*
	* @param string $search Prefix to search for
	* @param int $limit Maximum number of results to return (usually 10)
	* @param int $offset Number of results to skip (usually 0)
	* @return string[] Matching subpages
	*/
	public function prefixSearchSubpages( $search, $limit, $offset ) {
	if ( !$this->userNameUtils->isValid( $search ) ) {
	// No prefix suggestion for invalid user
	return [];
	}
	// Autocomplete subpage as user list - public to allow caching
	return $this->userNamePrefixSearch->search( UserNamePrefixSearch::AUDIENCE_PUBLIC, $search, $limit, $offset );
	}

	/**
	* @inheritDoc
	*/
	protected function getGroupName() {
	return 'users';
	}
	}

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