AbuseFilterPager.php
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AbuseFilterPager.php
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	<?php

	namespace MediaWiki\Extension\AbuseFilter\Pager;

	use LogicException;
	use MediaWiki\Cache\LinkBatchFactory;
	use MediaWiki\Extension\AbuseFilter\AbuseFilterPermissionManager;
	use MediaWiki\Extension\AbuseFilter\FilterUtils;
	use MediaWiki\Extension\AbuseFilter\SpecsFormatter;
	use MediaWiki\Extension\AbuseFilter\View\AbuseFilterViewList;
	use MediaWiki\Linker\Linker;
	use MediaWiki\Linker\LinkRenderer;
	use MediaWiki\Pager\TablePager;
	use MediaWiki\SpecialPage\SpecialPage;
	use stdClass;
	use UnexpectedValueException;
	use Wikimedia\Rdbms\FakeResultWrapper;
	use Wikimedia\Rdbms\IResultWrapper;

	/**
	* Class to build paginated filter list
	*/
	class AbuseFilterPager extends TablePager {

	/**
	* The unique sort fields for the sort options for unique paginate
	*/
	private const INDEX_FIELDS = [
	'af_id' => [ 'af_id' ],
	'af_enabled' => [ 'af_enabled', 'af_deleted', 'af_id' ],
	'af_timestamp' => [ 'af_timestamp', 'af_id' ],
	'af_hidden' => [ 'af_hidden', 'af_id' ],
	'af_group' => [ 'af_group', 'af_id' ],
	'af_hit_count' => [ 'af_hit_count', 'af_id' ],
	'af_public_comments' => [ 'af_public_comments', 'af_id' ],
	];

	/** @var ?LinkBatchFactory */
	private $linkBatchFactory;

	/** @var AbuseFilterPermissionManager */
	private $afPermManager;

	/** @var SpecsFormatter */
	protected $specsFormatter;

	/**
	* @var AbuseFilterViewList The associated page
	*/
	private $mPage;
	/**
	* @var array Query WHERE conditions
	*/
	private $conds;
	/**
	* @var string\|null The pattern being searched
	*/
	private $searchPattern;
	/**
	* @var string\|null The pattern search mode (LIKE, RLIKE or IRLIKE)
	*/
	private $searchMode;

	/**
	* @param AbuseFilterViewList $page
	* @param LinkRenderer $linkRenderer
	* @param ?LinkBatchFactory $linkBatchFactory
	* @param AbuseFilterPermissionManager $afPermManager
	* @param SpecsFormatter $specsFormatter
	* @param array $conds
	* @param ?string $searchPattern Null if no pattern was specified
	* @param ?string $searchMode
	*/
	public function __construct(
	AbuseFilterViewList $page,
	LinkRenderer $linkRenderer,
	?LinkBatchFactory $linkBatchFactory,
	AbuseFilterPermissionManager $afPermManager,
	SpecsFormatter $specsFormatter,
	array $conds,
	?string $searchPattern,
	?string $searchMode
	) {
	// needed by parent's constructor call
	$this->afPermManager = $afPermManager;
	$this->specsFormatter = $specsFormatter;
	parent::__construct( $page->getContext(), $linkRenderer );
	$this->mPage = $page;
	$this->linkBatchFactory = $linkBatchFactory;
	$this->conds = $conds;
	$this->searchPattern = $searchPattern;
	$this->searchMode = $searchMode;
	}

	/**
	* @return array
	*/
	public function getQueryInfo() {
	return [
	'tables' => [ 'abuse_filter', 'actor' ],
	'fields' => [
	// All columns but af_comments
	'af_id',
	'af_enabled',
	'af_deleted',
	'af_pattern',
	'af_global',
	'af_public_comments',
	'af_user' => 'actor_user',
	'af_user_text' => 'actor_name',
	'af_hidden',
	'af_hit_count',
	'af_timestamp',
	'af_actions',
	'af_group',
	'af_throttled'
	],
	'conds' => $this->conds,
	'join_conds' => [
	'actor' => [ 'JOIN', 'actor_id = af_actor' ],
	]
	];
	}

	/**
	* @param IResultWrapper $result
	*/
	protected function preprocessResults( $result ) {
	// LinkBatchFactory only provided and needed for local wiki results
	if ( $this->linkBatchFactory === null \|\| $this->getNumRows() === 0 ) {
	return;
	}

	$lb = $this->linkBatchFactory->newLinkBatch();
	$lb->setCaller( __METHOD__ );
	foreach ( $result as $row ) {
	$lb->add( NS_USER, $row->af_user_text );
	$lb->add( NS_USER_TALK, $row->af_user_text );
	}
	$lb->execute();
	$result->seek( 0 );
	}

	/**
	* @inheritDoc
	* This is the same as the parent implementation if no search pattern was specified.
	* Otherwise, it does a query with no limit and then slices the results à la ContribsPager.
	*/
	public function reallyDoQuery( $offset, $limit, $order ) {
	if ( $this->searchMode === null ) {
	return parent::reallyDoQuery( $offset, $limit, $order );
	}

	[ $tables, $fields, $conds, $fname, $options, $join_conds ] =
	$this->buildQueryInfo( $offset, $limit, $order );

	unset( $options['LIMIT'] );
	$res = $this->mDb->newSelectQueryBuilder()
	->tables( $tables )
	->fields( $fields )
	->conds( $conds )
	->caller( $fname )
	->options( $options )
	->joinConds( $join_conds )
	->fetchResultSet();

	$filtered = [];
	foreach ( $res as $row ) {
	if ( $this->matchesPattern( $row->af_pattern ) ) {
	$filtered[$row->af_id] = $row;
	}
	}

	// sort results and enforce limit like ContribsPager
	if ( $order === self::QUERY_ASCENDING ) {
	ksort( $filtered );
	} else {
	krsort( $filtered );
	}
	$filtered = array_slice( $filtered, 0, $limit );
	$filtered = array_values( $filtered );
	return new FakeResultWrapper( $filtered );
	}

	/**
	* Check whether $subject matches the given $pattern.
	*
	* @param string $subject
	* @return bool
	* @throws LogicException
	*/
	private function matchesPattern( $subject ) {
	$pattern = $this->searchPattern;
	switch ( $this->searchMode ) {
	case 'RLIKE':
	return (bool)preg_match( "/$pattern/u", $subject );
	case 'IRLIKE':
	return (bool)preg_match( "/$pattern/ui", $subject );
	case 'LIKE':
	return mb_stripos( $subject, $pattern ) !== false;
	default:
	throw new LogicException( "Unknown search type {$this->searchMode}" );
	}
	}

	/**
	* Note: this method is called by parent::__construct
	* @return array
	* @see MediaWiki\Pager\Pager::getFieldNames()
	*/
	public function getFieldNames() {
	$headers = [
	'af_id' => 'abusefilter-list-id',
	'af_public_comments' => 'abusefilter-list-public',
	'af_actions' => 'abusefilter-list-consequences',
	'af_enabled' => 'abusefilter-list-status',
	'af_timestamp' => 'abusefilter-list-lastmodified',
	'af_hidden' => 'abusefilter-list-visibility',
	];

	$performer = $this->getAuthority();
	if ( $this->afPermManager->canSeeLogDetails( $performer ) ) {
	$headers['af_hit_count'] = 'abusefilter-list-hitcount';
	}

	if (
	$this->afPermManager->canViewPrivateFilters( $performer ) &&
	$this->searchMode !== null
	) {
	// This is also excluded in the default view
	$headers['af_pattern'] = 'abusefilter-list-pattern';
	}

	if ( count( $this->getConfig()->get( 'AbuseFilterValidGroups' ) ) > 1 ) {
	$headers['af_group'] = 'abusefilter-list-group';
	}

	foreach ( $headers as &$msg ) {
	$msg = $this->msg( $msg )->text();
	}

	return $headers;
	}

	/**
	* @param string $name
	* @param string\|null $value
	* @return string
	*/
	public function formatValue( $name, $value ) {
	$lang = $this->getLanguage();
	$user = $this->getUser();
	$linkRenderer = $this->getLinkRenderer();
	$row = $this->mCurrentRow;

	switch ( $name ) {
	case 'af_id':
	return $linkRenderer->makeLink(
	SpecialPage::getTitleFor( 'AbuseFilter', $value ),
	$lang->formatNum( intval( $value ) )
	);
	case 'af_pattern':
	return $this->getHighlightedPattern( $row );
	case 'af_public_comments':
	return $linkRenderer->makeLink(
	SpecialPage::getTitleFor( 'AbuseFilter', $row->af_id ),
	$value
	);
	case 'af_actions':
	$actions = explode( ',', $value );
	$displayActions = [];
	foreach ( $actions as $action ) {
	$displayActions[] = $this->specsFormatter->getActionDisplay( $action );
	}
	return $lang->commaList( $displayActions );
	case 'af_enabled':
	$statuses = [];
	if ( $row->af_deleted ) {
	$statuses[] = $this->msg( 'abusefilter-deleted' )->parse();
	} elseif ( $row->af_enabled ) {
	$statuses[] = $this->msg( 'abusefilter-enabled' )->parse();
	if ( $row->af_throttled ) {
	$statuses[] = $this->msg( 'abusefilter-throttled' )->parse();
	}
	} else {
	$statuses[] = $this->msg( 'abusefilter-disabled' )->parse();
	}

	if ( $row->af_global && $this->getConfig()->get( 'AbuseFilterIsCentral' ) ) {
	$statuses[] = $this->msg( 'abusefilter-status-global' )->parse();
	}

	return $lang->commaList( $statuses );
	case 'af_hidden':
	$flagMsgs = [];
	if ( FilterUtils::isHidden( (int)$value ) ) {
	$flagMsgs[] = $this->msg( 'abusefilter-hidden' )->parse();
	}
	if ( FilterUtils::isProtected( (int)$value ) ) {
	$flagMsgs[] = $this->msg( 'abusefilter-protected' )->parse();
	}
	if ( !$flagMsgs ) {
	return $this->msg( 'abusefilter-unhidden' )->parse();
	}
	return $lang->commaList( $flagMsgs );
	case 'af_hit_count':
	if ( $this->afPermManager->canSeeLogDetailsForFilter( $user, $row->af_hidden ) ) {
	$count_display = $this->msg( 'abusefilter-hitcount' )
	->numParams( $value )->text();
	$link = $linkRenderer->makeKnownLink(
	SpecialPage::getTitleFor( 'AbuseLog' ),
	$count_display,
	[],
	[ 'wpSearchFilter' => $row->af_id ]
	);
	} else {
	$link = "";
	}
	return $link;
	case 'af_timestamp':
	$userLink =
	Linker::userLink(
	$row->af_user ?? 0,
	$row->af_user_text
	) .
	Linker::userToolLinks(
	$row->af_user ?? 0,
	$row->af_user_text
	);

	return $this->msg( 'abusefilter-edit-lastmod-text' )
	->rawParams(
	$this->mPage->getLinkToLatestDiff(
	$row->af_id,
	$lang->userTimeAndDate( $value, $user )
	),
	$userLink,
	$this->mPage->getLinkToLatestDiff(
	$row->af_id,
	$lang->userDate( $value, $user )
	),
	$this->mPage->getLinkToLatestDiff(
	$row->af_id,
	$lang->userTime( $value, $user )
	)
	)->params(
	wfEscapeWikiText( $row->af_user_text )
	)->parse();
	case 'af_group':
	return $this->specsFormatter->nameGroup( $value );
	default:
	throw new UnexpectedValueException( "Unknown row type $name!" );
	}
	}

	/**
	* Get the filter pattern with <b> elements surrounding the searched pattern
	*
	* @param stdClass $row
	* @return string
	*/
	private function getHighlightedPattern( stdClass $row ) {
	if ( $this->searchMode === null ) {
	throw new LogicException( 'Cannot search without a mode.' );
	}
	$maxLen = 50;
	if ( $this->searchMode === 'LIKE' ) {
	$position = mb_stripos( $row->af_pattern, $this->searchPattern );
	$length = mb_strlen( $this->searchPattern );
	} else {
	$regex = '/' . $this->searchPattern . '/u';
	if ( $this->searchMode === 'IRLIKE' ) {
	$regex .= 'i';
	}

	$matches = [];
	// phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
	$check = @preg_match(
	$regex,
	$row->af_pattern,
	$matches
	);
	// This may happen in case of catastrophic backtracking, or regexps matching
	// the empty string.
	if ( $check === false \|\| strlen( $matches[0] ) === 0 ) {
	return htmlspecialchars( mb_substr( $row->af_pattern, 0, 50 ) );
	}

	$length = mb_strlen( $matches[0] );
	$position = mb_strpos( $row->af_pattern, $matches[0] );
	}

	$remaining = $maxLen - $length;
	if ( $remaining <= 0 ) {
	$pattern = '<b>' .
	htmlspecialchars( mb_substr( $row->af_pattern, $position, $maxLen ) ) .
	'</b>';
	} else {
	// Center the snippet on the matched string
	$minoffset = max( $position - round( $remaining / 2 ), 0 );
	$pattern = mb_substr( $row->af_pattern, $minoffset, $maxLen );
	$pattern =
	htmlspecialchars( mb_substr( $pattern, 0, $position - $minoffset ) ) .
	'<b>' .
	htmlspecialchars( mb_substr( $pattern, $position - $minoffset, $length ) ) .
	'</b>' .
	htmlspecialchars( mb_substr(
	$pattern,
	$position - $minoffset + $length,
	$remaining - ( $position - $minoffset + $length )
	)
	);
	}
	return $pattern;
	}

	/**
	* @codeCoverageIgnore Merely declarative
	* @inheritDoc
	*/
	public function getDefaultSort() {
	return 'af_id';
	}

	/**
	* @codeCoverageIgnore Merely declarative
	* @inheritDoc
	*/
	public function getTableClass() {
	return parent::getTableClass() . ' mw-abusefilter-list-scrollable';
	}

	/**
	* @param stdClass $row
	* @return string
	* @see TablePager::getRowClass()
	*/
	public function getRowClass( $row ) {
	if ( $row->af_enabled ) {
	return $row->af_throttled ? 'mw-abusefilter-list-throttled' : 'mw-abusefilter-list-enabled';
	} elseif ( $row->af_deleted ) {
	return 'mw-abusefilter-list-deleted';
	} else {
	return 'mw-abusefilter-list-disabled';
	}
	}

	/**
	* @inheritDoc
	*/
	public function getIndexField() {
	return [ self::INDEX_FIELDS[$this->mSort] ];
	}

	/**
	* @param string $field
	*
	* @return bool
	*/
	public function isFieldSortable( $field ) {
	if ( ( $field === 'af_hit_count' \|\| $field === 'af_public_comments' )
	&& !$this->afPermManager->canSeeLogDetails( $this->getAuthority() )
	) {
	return false;
	}
	return isset( self::INDEX_FIELDS[$field] );
	}
	}

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