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1<?php
2/**
3 * Class for blocks stored in the database.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
19 *
20 * @file
21 */
22
23namespace MediaWiki\Block;
24
25use InvalidArgumentException;
26use MediaWiki\Block\Restriction\ActionRestriction;
27use MediaWiki\Block\Restriction\NamespaceRestriction;
28use MediaWiki\Block\Restriction\PageRestriction;
29use MediaWiki\Block\Restriction\Restriction;
30use MediaWiki\Html\Html;
31use MediaWiki\MainConfigNames;
32use MediaWiki\MediaWikiServices;
33use MediaWiki\Title\Title;
34use MediaWiki\User\UserIdentity;
35use stdClass;
36use UnexpectedValueException;
37use Wikimedia\IPUtils;
38use Wikimedia\Rdbms\IDatabase;
39
40/**
41 * A DatabaseBlock (unlike a SystemBlock) is stored in the database, may give
42 * rise to autoblocks and may be tracked with cookies. Such blocks* are more
43 * customizable than system blocks: they may be hard blocks, and they may be
44 * sitewide or partial.
45 *
46 * @since 1.34 Renamed from Block.
47 */
48class DatabaseBlock extends AbstractBlock {
49    /** @var bool */
50    private $auto;
51
52    /** @var int|null */
53    private $parentBlockId;
54
55    /** @var int|null */
56    private $id;
57
58    /** @var bool */
59    private $isAutoblocking;
60
61    /** @var Restriction[] */
62    private $restrictions;
63
64    /** @var UserIdentity|null */
65    private $blocker;
66
67    /**
68     * Create a new block with specified option parameters on a user, IP or IP range.
69     *
70     * @param array $options Parameters of the block, with options supported by
71     *  `AbstractBlock::__construct`, and also:
72     *  - auto: (bool) Is this an automatic block?
73     *  - expiry: (string) Database timestamp of expiration of the block or 'infinity'
74     *  - decodedExpiry: (string) The decoded expiry in MW 14-char format or 'infinity'
75     *  - anonOnly: (bool) Only disallow anonymous actions
76     *  - createAccount: (bool) Disallow creation of new accounts
77     *  - enableAutoblock: (bool) Enable automatic blocking
78     *  - blockEmail: (bool) Disallow sending emails
79     *  - allowUsertalk: (bool) Allow the target to edit its own talk page
80     *  - sitewide: (bool) Disallow editing all pages and all contribution actions,
81     *    except those specifically allowed by other block flags
82     *  - by: (UserIdentity) UserIdentity object of the blocker.
83     *  - restrictions: (Restriction[]) Array of partial block restrictions
84     *
85     * @since 1.26 $options array
86     */
87    public function __construct( array $options = [] ) {
88        parent::__construct( $options );
89
90        $defaults = [
91            'id'              => null,
92            'parentBlockId'   => null,
93            'auto'            => false,
94            'expiry'          => '',
95            'createAccount'   => false,
96            'enableAutoblock' => false,
97            'blockEmail'      => false,
98            'allowUsertalk'   => false,
99            'sitewide'        => true,
100            'by'              => null,
101            'restrictions'    => null,
102        ];
103
104        $options += $defaults;
105
106        $this->id = $options['id'];
107        $this->parentBlockId = $options['parentBlockId'];
108
109        if ( $options['by'] instanceof UserIdentity ) {
110            $this->setBlocker( $options['by'] );
111        }
112
113        if ( isset( $options['decodedExpiry'] ) ) {
114            $this->setExpiry( $options['decodedExpiry'] );
115        } else {
116            $this->setExpiry( $this->getDBConnection( DB_REPLICA )->decodeExpiry( $options['expiry'] ) );
117        }
118
119        if ( $options['restrictions'] !== null ) {
120            $this->setRestrictions( $options['restrictions'] );
121        }
122
123        // Boolean settings
124        $this->auto = (bool)$options['auto'];
125        $this->isAutoblocking( (bool)$options['enableAutoblock'] );
126        $this->isSitewide( (bool)$options['sitewide'] );
127        $this->isEmailBlocked( (bool)$options['blockEmail'] );
128        $this->isCreateAccountBlocked( (bool)$options['createAccount'] );
129        $this->isUsertalkEditAllowed( (bool)$options['allowUsertalk'] );
130    }
131
132    /**
133     * Load a block from the block ID.
134     *
135     * @deprecated since 1.42 use DatabaseBlockStore::newFromID()
136     * @param int $id ID to search for
137     * @return DatabaseBlock|null
138     */
139    public static function newFromID( $id ) {
140        wfDeprecated( __METHOD__, '1.42' );
141        return MediaWikiServices::getInstance()->getDatabaseBlockStore()
142            ->newFromID( $id );
143    }
144
145    /**
146     * Return the tables, fields, and join conditions to be selected to create
147     * a new block object.
148     *
149     * Since 1.34, ipb_by and ipb_by_text have not been present in the
150     * database, but they continue to be available in query results as
151     * aliases.
152     *
153     * @deprecated since 1.43, use DatabaseBlockStore::getQueryInfo()
154     * @since 1.31
155     *
156     * @return array[] With three keys:
157     *   - tables: (string[]) to include in the `$table` to `IDatabase->select()`
158     *     or `SelectQueryBuilder::tables`
159     *   - fields: (string[]) to include in the `$vars` to `IDatabase->select()`
160     *     or `SelectQueryBuilder::fields`
161     *   - joins: (array) to include in the `$join_conds` to `IDatabase->select()`
162     *     or `SelectQueryBuilder::joinConds`
163     * @phan-return array{tables:string[],fields:string[],joins:array}
164     */
165    public static function getQueryInfo() {
166        wfDeprecated( __METHOD__, '1.43' );
167        return MediaWikiServices::getInstance()->getDatabaseBlockStore()
168            ->getQueryInfo( DatabaseBlockStore::SCHEMA_IPBLOCKS );
169    }
170
171    /**
172     * Check if two blocks are effectively equal.  Doesn't check irrelevant things like
173     * the blocking user or the block timestamp, only things which affect the blocked user
174     *
175     * @param DatabaseBlock $block
176     * @return bool
177     */
178    public function equals( DatabaseBlock $block ) {
179        return (
180            (string)$this->target == (string)$block->target
181            && $this->type == $block->type
182            && $this->auto == $block->auto
183            && $this->isHardblock() == $block->isHardblock()
184            && $this->isCreateAccountBlocked() == $block->isCreateAccountBlocked()
185            && $this->getExpiry() == $block->getExpiry()
186            && $this->isAutoblocking() == $block->isAutoblocking()
187            && $this->getHideName() == $block->getHideName()
188            && $this->isEmailBlocked() == $block->isEmailBlocked()
189            && $this->isUsertalkEditAllowed() == $block->isUsertalkEditAllowed()
190            && $this->getReasonComment()->text == $block->getReasonComment()->text
191            && $this->isSitewide() == $block->isSitewide()
192            // DatabaseBlock::getRestrictions() may perform a database query, so
193            // keep it at the end.
194            && $this->getBlockRestrictionStore()->equals(
195                $this->getRestrictions(), $block->getRestrictions()
196            )
197        );
198    }
199
200    /**
201     * Get a set of SQL conditions which will select range blocks encompassing a given range
202     *
203     * @deprecated since 1.43 use DatabaseBlockStore::getRangeCond
204     *
205     * @param string $start Hexadecimal IP representation
206     * @param string|null $end Hexadecimal IP representation, or null to use $start = $end
207     * @return string
208     */
209    public static function getRangeCond( $start, $end = null ) {
210        wfDeprecated( __METHOD__, '1.43' );
211        return MediaWikiServices::getInstance()->getDatabaseBlockStore()
212            ->getRangeCond( $start, $end, DatabaseBlockStore::SCHEMA_IPBLOCKS );
213    }
214
215    /**
216     * Create a new DatabaseBlock object from a database row
217     * @param stdClass $row Row from the ipblocks table
218     * @return DatabaseBlock
219     */
220    public static function newFromRow( $row ) {
221        $services = MediaWikiServices::getInstance();
222        $db = $services->getConnectionProvider()->getReplicaDatabase();
223        return $services->getDatabaseBlockStore()->newFromRow( $db, $row );
224    }
225
226    /**
227     * Delete the row from the IP blocks table.
228     *
229     * @deprecated since 1.36 Use DatabaseBlockStore::deleteBlock instead.
230     * @return bool
231     */
232    public function delete() {
233        return MediaWikiServices::getInstance()
234            ->getDatabaseBlockStoreFactory()
235            ->getDatabaseBlockStore( $this->getWikiId() )
236            ->deleteBlock( $this );
237    }
238
239    /**
240     * Insert a block into the block table. Will fail if there is a conflicting
241     * block (same name and options) already in the database.
242     *
243     * @deprecated since 1.36 Use DatabaseBlockStore::insertBlock instead.
244     *             Passing a custom db connection is no longer supported since 1.42.
245     *
246     * @return bool|array False on failure, assoc array on success:
247     *     ('id' => block ID, 'autoIds' => array of autoblock IDs)
248     */
249    public function insert() {
250        return MediaWikiServices::getInstance()
251            ->getDatabaseBlockStoreFactory()
252            ->getDatabaseBlockStore( $this->getWikiId() )
253            ->insertBlock( $this );
254    }
255
256    /**
257     * Update a block in the DB with new parameters.
258     * The ID field needs to be loaded first.
259     *
260     * @deprecated since 1.36 Use DatabaseBlockStore::updateBlock instead.
261     * @return bool|array False on failure, array on success:
262     *   ('id' => block ID, 'autoIds' => array of autoblock IDs)
263     */
264    public function update() {
265        return MediaWikiServices::getInstance()
266            ->getDatabaseBlockStoreFactory()
267            ->getDatabaseBlockStore( $this->getWikiId() )
268            ->updateBlock( $this );
269    }
270
271    /**
272     * Checks whether a given IP is on the autoblock exemption list.
273     *
274     * @since 1.36
275     *
276     * @param string $ip The IP to check
277     * @return bool
278     */
279    public static function isExemptedFromAutoblocks( $ip ) {
280        return MediaWikiServices::getInstance()->getAutoblockExemptionList()
281            ->isExempt( $ip );
282    }
283
284    /**
285     * Autoblocks the given IP, referring to this block.
286     *
287     * @deprecated since 1.42, use DatabaseBlockStore::doAutoblock instead
288     *
289     * @param string $autoblockIP The IP to autoblock.
290     * @return int|false ID if an autoblock was inserted, false if not.
291     */
292    public function doAutoblock( $autoblockIP ) {
293        return MediaWikiServices::getInstance()
294            ->getDatabaseBlockStoreFactory()
295            ->getDatabaseBlockStore( $this->getWikiId() )
296            ->doAutoblock( $this, $autoblockIP );
297    }
298
299    /**
300     * Has the block expired?
301     * @return bool
302     */
303    public function isExpired() {
304        $timestamp = wfTimestampNow();
305        wfDebug( __METHOD__ . " checking current " . $timestamp . " vs $this->expiry" );
306
307        return $this->getExpiry() && $timestamp > $this->getExpiry();
308    }
309
310    /**
311     * Update the timestamp on autoblocks.
312     *
313     * @deprecated since 1.42, use DatabaseBlockStore::updateTimestamp instead
314     */
315    public function updateTimestamp() {
316        MediaWikiServices::getInstance()
317            ->getDatabaseBlockStoreFactory()
318            ->getDatabaseBlockStore( $this->getWikiId() )
319            ->updateTimestamp( $this );
320    }
321
322    /**
323     * Get the IP address at the start of the range in Hex form
324     * @return string IP in Hex form
325     */
326    public function getRangeStart() {
327        switch ( $this->type ) {
328            case self::TYPE_USER:
329                return '';
330            case self::TYPE_IP:
331                return IPUtils::toHex( $this->target );
332            case self::TYPE_RANGE:
333                [ $start, /*...*/ ] = IPUtils::parseRange( $this->target );
334                return $start;
335            default:
336                throw new UnexpectedValueException( "Block with invalid type" );
337        }
338    }
339
340    /**
341     * Get the IP address at the end of the range in Hex form
342     * @return string IP in Hex form
343     */
344    public function getRangeEnd() {
345        switch ( $this->type ) {
346            case self::TYPE_USER:
347                return '';
348            case self::TYPE_IP:
349                return IPUtils::toHex( $this->target );
350            case self::TYPE_RANGE:
351                [ /*...*/, $end ] = IPUtils::parseRange( $this->target );
352                return $end;
353            default:
354                throw new UnexpectedValueException( "Block with invalid type" );
355        }
356    }
357
358    /**
359     * @inheritDoc
360     */
361    public function getId( $wikiId = self::LOCAL ): ?int {
362        $this->assertWiki( $wikiId );
363        return $this->id;
364    }
365
366    /**
367     * Set the block ID
368     *
369     * @internal Only for use in DatabaseBlockStore; private until 1.36
370     * @param int $blockId
371     * @return self
372     */
373    public function setId( $blockId ) {
374        $this->id = (int)$blockId;
375
376        if ( is_array( $this->restrictions ) ) {
377            $this->restrictions = $this->getBlockRestrictionStore()->setBlockId(
378                $blockId, $this->restrictions
379            );
380        }
381
382        return $this;
383    }
384
385    /**
386     * @since 1.34
387     * @return int|null If this is an autoblock, ID of the parent block; otherwise null
388     */
389    public function getParentBlockId() {
390        // Sanity: this shouldn't have been 0, because when it was set in
391        // initFromRow() we converted 0 to null, in case the object was serialized
392        // and then unserialized, force 0 back to null, see T282890
393        return $this->parentBlockId ?: null;
394    }
395
396    /**
397     * Get/set whether the block is a hard block (affects logged-in users on a given IP/range)
398     * @param bool|null $x
399     * @return bool
400     */
401    public function isHardblock( $x = null ): bool {
402        wfSetVar( $this->isHardblock, $x );
403
404        // All user blocks are hard blocks
405        return $this->getType() == self::TYPE_USER
406            ? true
407            : $this->isHardblock;
408    }
409
410    /**
411     * Does the block cause autoblocks to be created?
412     *
413     * @param null|bool $x
414     * @return bool
415     */
416    public function isAutoblocking( $x = null ) {
417        wfSetVar( $this->isAutoblocking, $x );
418
419        // You can't put an autoblock on an IP or range as we don't have any history to
420        // look over to get more IPs from
421        return $this->getType() == self::TYPE_USER
422            ? $this->isAutoblocking
423            : false;
424    }
425
426    /**
427     * Get the block name, but with autoblocked IPs hidden as per standard privacy policy
428     * @return string Text is escaped
429     */
430    public function getRedactedName() {
431        if ( $this->auto ) {
432            return Html::element(
433                'span',
434                [ 'class' => 'mw-autoblockid' ],
435                wfMessage( 'autoblockid', $this->id )->text()
436            );
437        } else {
438            return htmlspecialchars( $this->getTargetName() );
439        }
440    }
441
442    /**
443     * Get the expiry timestamp for an autoblock created at the given time.
444     *
445     * @deprecated since 1.42 No replacement, no known callers.
446     *
447     * @param string|int $timestamp
448     * @return string
449     */
450    public static function getAutoblockExpiry( $timestamp ) {
451        wfDeprecated( __METHOD__, '1.42' );
452        return MediaWikiServices::getInstance()->getDatabaseBlockStore()
453            ->getAutoblockExpiry( $timestamp );
454    }
455
456    /**
457     * Given a target and the target's type, get an existing block object if possible.
458     * @param string|UserIdentity|int|null $specificTarget A block target, which may be one of
459     *   several types:
460     *     * A user to block, in which case $target will be a User
461     *     * An IP to block, in which case $target will be a User generated by using
462     *       User::newFromName( $ip, false ) to turn off name validation
463     *     * An IP range, in which case $target will be a String "123.123.123.123/18" etc
464     *     * The ID of an existing block, in the format "#12345" (since pure numbers are valid
465     *       usernames
466     *     Calling this with a user, IP address or range will not select autoblocks, and will
467     *     only select a block where the targets match exactly (so looking for blocks on
468     *     1.2.3.4 will not select 1.2.0.0/16 or even 1.2.3.4/32)
469     * @param string|UserIdentity|int|null $vagueTarget As above, but we will search for *any*
470     *     block which affects that target (so for an IP address, get ranges containing that IP;
471     *     and also get any relevant autoblocks). Leave empty or blank to skip IP-based lookups.
472     * @param bool $fromPrimary Whether to use the DB_PRIMARY database
473     * @return DatabaseBlock|null (null if no relevant block could be found). The target and type
474     *     of the returned block will refer to the actual block which was found, which might
475     *     not be the same as the target you gave if you used $vagueTarget!
476     */
477    public static function newFromTarget(
478        $specificTarget,
479        $vagueTarget = null,
480        $fromPrimary = false
481    ) {
482        return MediaWikiServices::getInstance()->getDatabaseBlockStore()
483            ->newFromTarget( $specificTarget, $vagueTarget, $fromPrimary );
484    }
485
486    /**
487     * This is similar to DatabaseBlock::newFromTarget, but it returns all the relevant blocks.
488     *
489     * @since 1.34
490     * @param string|UserIdentity|int|null $specificTarget
491     * @param string|UserIdentity|int|null $vagueTarget
492     * @param bool $fromPrimary
493     * @return DatabaseBlock[] Any relevant blocks
494     */
495    public static function newListFromTarget(
496        $specificTarget,
497        $vagueTarget = null,
498        $fromPrimary = false
499    ) {
500        return MediaWikiServices::getInstance()->getDatabaseBlockStore()
501            ->newListFromTarget( $specificTarget, $vagueTarget, $fromPrimary );
502    }
503
504    /**
505     * Get all blocks that match any IP from an array of IP addresses
506     *
507     * @param array $ipChain List of IPs (strings), usually retrieved from the
508     *     X-Forwarded-For header of the request
509     * @param bool $applySoftBlocks Include soft blocks (anonymous-only blocks). These
510     *     should only block anonymous and temporary users.
511     * @param bool $fromPrimary Whether to query the primary or replica DB
512     * @return self[]
513     * @since 1.22
514     */
515    public static function getBlocksForIPList( array $ipChain, $applySoftBlocks, $fromPrimary = false ) {
516        return MediaWikiServices::getInstance()->getBlockManager()
517            ->getBlocksForIPList( $ipChain, $applySoftBlocks, $fromPrimary );
518    }
519
520    /**
521     * @inheritDoc
522     *
523     * Autoblocks have whichever type corresponds to their target, so to detect if a block is an
524     * autoblock, we have to check the mAuto property instead.
525     */
526    public function getType(): ?int {
527        return $this->auto
528            ? self::TYPE_AUTO
529            : parent::getType();
530    }
531
532    /**
533     * @inheritDoc
534     */
535    public function getIdentifier( $wikiId = self::LOCAL ) {
536        return $this->getId( $wikiId );
537    }
538
539    /**
540     * Getting the restrictions will perform a database query if the restrictions
541     * are not already loaded.
542     *
543     * @since 1.33
544     * @return Restriction[]
545     */
546    public function getRestrictions() {
547        if ( $this->restrictions === null ) {
548            // If the block ID has not been set, then do not attempt to load the
549            // restrictions.
550            if ( !$this->id ) {
551                return [];
552            }
553            $this->restrictions = $this->getBlockRestrictionStore()->loadByBlockId( $this->id );
554        }
555
556        return $this->restrictions;
557    }
558
559    /**
560     * Get restrictions without loading from database if not yet loaded
561     *
562     * @internal
563     * @return ?Restriction[]
564     */
565    public function getRawRestrictions(): ?array {
566        return $this->restrictions;
567    }
568
569    /**
570     * @since 1.33
571     * @param Restriction[] $restrictions
572     * @return self
573     */
574    public function setRestrictions( array $restrictions ) {
575        $this->restrictions = $restrictions;
576        return $this;
577    }
578
579    /**
580     * @inheritDoc
581     */
582    public function appliesToTitle( Title $title ) {
583        if ( $this->isSitewide() ) {
584            return true;
585        }
586
587        $restrictions = $this->getRestrictions();
588        foreach ( $restrictions as $restriction ) {
589            if ( $restriction->matches( $title ) ) {
590                return true;
591            }
592        }
593
594        return false;
595    }
596
597    /**
598     * @inheritDoc
599     */
600    public function appliesToNamespace( $ns ) {
601        if ( $this->isSitewide() ) {
602            return true;
603        }
604
605        // Blocks do not apply to virtual namespaces.
606        if ( $ns < 0 ) {
607            return false;
608        }
609
610        $restriction = $this->findRestriction( NamespaceRestriction::TYPE, $ns );
611
612        return (bool)$restriction;
613    }
614
615    /**
616     * @inheritDoc
617     */
618    public function appliesToPage( $pageId ) {
619        if ( $this->isSitewide() ) {
620            return true;
621        }
622
623        // If the pageId is not over zero, the block cannot apply to it.
624        if ( $pageId <= 0 ) {
625            return false;
626        }
627
628        $restriction = $this->findRestriction( PageRestriction::TYPE, $pageId );
629
630        return (bool)$restriction;
631    }
632
633    /**
634     * @inheritDoc
635     */
636    public function appliesToRight( $right ) {
637        // Temporarily access service container until the feature flag is removed: T280532
638        $config = MediaWikiServices::getInstance()->getMainConfig();
639
640        $res = parent::appliesToRight( $right );
641
642        if ( !$res && $config->get( MainConfigNames::EnablePartialActionBlocks ) ) {
643            $blockActions = MediaWikiServices::getInstance()->getBlockActionInfo()
644                ->getAllBlockActions();
645
646            if ( isset( $blockActions[$right] ) ) {
647                $restriction = $this->findRestriction(
648                    ActionRestriction::TYPE,
649                    $blockActions[$right]
650                );
651
652                // $res may be null or false. This should be preserved if there is no restriction.
653                if ( $restriction ) {
654                    $res = true;
655                }
656            }
657        }
658
659        return $res;
660    }
661
662    /**
663     * Find Restriction by type and value.
664     *
665     * @param string $type
666     * @param int $value
667     * @return Restriction|null
668     */
669    private function findRestriction( $type, $value ) {
670        $restrictions = $this->getRestrictions();
671        foreach ( $restrictions as $restriction ) {
672            if ( $restriction->getType() !== $type ) {
673                continue;
674            }
675
676            if ( $restriction->getValue() === $value ) {
677                return $restriction;
678            }
679        }
680
681        return null;
682    }
683
684    /**
685     * Get a BlockRestrictionStore instance
686     *
687     * @return BlockRestrictionStore
688     */
689    private function getBlockRestrictionStore(): BlockRestrictionStore {
690        // TODO: get rid of global state here
691        return MediaWikiServices::getInstance()
692            ->getBlockRestrictionStoreFactory()
693            ->getBlockRestrictionStore( $this->getWikiId() );
694    }
695
696    /**
697     * @inheritDoc
698     */
699    public function getBy( $wikiId = self::LOCAL ): int {
700        $this->assertWiki( $wikiId );
701        return ( $this->blocker ) ? $this->blocker->getId( $wikiId ) : 0;
702    }
703
704    /**
705     * @inheritDoc
706     */
707    public function getByName() {
708        return ( $this->blocker ) ? $this->blocker->getName() : '';
709    }
710
711    /**
712     * Get the user who implemented this block
713     *
714     * @return UserIdentity|null user object or null. May be a foreign user.
715     */
716    public function getBlocker(): ?UserIdentity {
717        return $this->blocker;
718    }
719
720    /**
721     * Set the user who implemented (or will implement) this block
722     *
723     * @param UserIdentity $user
724     */
725    public function setBlocker( $user ) {
726        if ( !$user->isRegistered() &&
727            MediaWikiServices::getInstance()->getUserNameUtils()->isUsable( $user->getName() )
728        ) {
729            throw new InvalidArgumentException(
730                'Blocker must be a local user or a name that cannot be a local user'
731            );
732        }
733        $this->assertWiki( $user->getWikiId() );
734        $this->blocker = $user;
735    }
736
737    /**
738     * @param int $i Specific or virtual (DB_PRIMARY/DB_REPLICA) server index
739     * @return IDatabase
740     */
741    private function getDBConnection( int $i ) {
742        return MediaWikiServices::getInstance()
743            ->getDBLoadBalancerFactory()
744            ->getMainLB( $this->getWikiId() )
745            ->getConnection( $i, [], $this->getWikiId() );
746    }
747}