mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/DiscussionTools
synced 2024-12-11 16:16:51 +00:00
c1442f8331
From in-person code review with Amir: * getConnectionRef() has been deprecated in favor of getConnection() * 'watchlist' query group no longer exists (T263127) * Since this simplifies things, we can remove our wrapper methods Change-Id: Ic610233b2e6d6ed68f7e1f5b31bb8996ed77f04b
557 lines
18 KiB
PHP
557 lines
18 KiB
PHP
<?php
|
|
|
|
namespace MediaWiki\Extension\DiscussionTools;
|
|
|
|
use ConfigFactory;
|
|
use MediaWiki\Extension\DiscussionTools\ThreadItem\CommentItem;
|
|
use MediaWiki\Extension\DiscussionTools\ThreadItem\DatabaseCommentItem;
|
|
use MediaWiki\Extension\DiscussionTools\ThreadItem\DatabaseHeadingItem;
|
|
use MediaWiki\Extension\DiscussionTools\ThreadItem\DatabaseThreadItem;
|
|
use MediaWiki\Extension\DiscussionTools\ThreadItem\HeadingItem;
|
|
use MediaWiki\Page\PageStore;
|
|
use MediaWiki\Revision\RevisionRecord;
|
|
use MediaWiki\Revision\RevisionStore;
|
|
use MediaWiki\User\ActorStore;
|
|
use MWTimestamp;
|
|
use ReadOnlyMode;
|
|
use stdClass;
|
|
use TitleFormatter;
|
|
use Wikimedia\Rdbms\ILBFactory;
|
|
use Wikimedia\Rdbms\ILoadBalancer;
|
|
use Wikimedia\Rdbms\IResultWrapper;
|
|
use Wikimedia\Rdbms\SelectQueryBuilder;
|
|
|
|
/**
|
|
* Stores and fetches ThreadItemSets from the database.
|
|
*/
|
|
class ThreadItemStore {
|
|
/** @var ConfigFactory */
|
|
private $configFactory;
|
|
|
|
/** @var ILoadBalancer */
|
|
private $loadBalancer;
|
|
|
|
/** @var ReadOnlyMode */
|
|
private $readOnlyMode;
|
|
|
|
/** @var PageStore */
|
|
private $pageStore;
|
|
|
|
/** @var RevisionStore */
|
|
private $revStore;
|
|
|
|
/** @var TitleFormatter */
|
|
private $titleFormatter;
|
|
|
|
/** @var ActorStore */
|
|
private $actorStore;
|
|
|
|
/**
|
|
* @param ConfigFactory $configFactory
|
|
* @param ILBFactory $lbFactory
|
|
* @param ReadOnlyMode $readOnlyMode
|
|
* @param PageStore $pageStore
|
|
* @param RevisionStore $revStore
|
|
* @param TitleFormatter $titleFormatter
|
|
* @param ActorStore $actorStore
|
|
*/
|
|
public function __construct(
|
|
ConfigFactory $configFactory,
|
|
ILBFactory $lbFactory,
|
|
ReadOnlyMode $readOnlyMode,
|
|
PageStore $pageStore,
|
|
RevisionStore $revStore,
|
|
TitleFormatter $titleFormatter,
|
|
ActorStore $actorStore
|
|
) {
|
|
$this->configFactory = $configFactory;
|
|
$this->loadBalancer = $lbFactory->getMainLB();
|
|
$this->readOnlyMode = $readOnlyMode;
|
|
$this->pageStore = $pageStore;
|
|
$this->revStore = $revStore;
|
|
$this->titleFormatter = $titleFormatter;
|
|
$this->actorStore = $actorStore;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the tables necessary for this feature haven't been created yet,
|
|
* to allow failing softly in that case.
|
|
*
|
|
* @return bool
|
|
*/
|
|
private function isDisabled(): bool {
|
|
$dtConfig = $this->configFactory->makeConfig( 'discussiontools' );
|
|
return !$dtConfig->get( 'DiscussionToolsEnablePermalinksBackend' );
|
|
}
|
|
|
|
/**
|
|
* Find the thread items with the given name in the newest revision of every page in which they
|
|
* have appeared.
|
|
*
|
|
* @param string|string[] $itemName
|
|
* @return DatabaseThreadItem[]
|
|
*/
|
|
public function findNewestRevisionsByName( $itemName ): array {
|
|
if ( $this->isDisabled() ) {
|
|
return [];
|
|
}
|
|
|
|
$queryBuilder = $this->getIdsNamesBuilder()
|
|
->where( [
|
|
'it_itemname' => $itemName,
|
|
// Disallow querying for headings of sections that contain no comments.
|
|
// They all share the same name, so this would return a huge useless list on most wikis.
|
|
// (But we still store them, as we might need this data elsewhere.)
|
|
"it_itemname != 'h-'",
|
|
] );
|
|
|
|
$result = $this->fetchItemsResultSet( $queryBuilder );
|
|
$revs = $this->fetchRevisionAndPageForItems( $result );
|
|
|
|
$threadItems = [];
|
|
foreach ( $result as $row ) {
|
|
$threadItem = $this->getThreadItemFromRow( $row, null, $revs );
|
|
if ( $threadItem ) {
|
|
$threadItems[] = $threadItem;
|
|
}
|
|
}
|
|
return $threadItems;
|
|
}
|
|
|
|
/**
|
|
* Find the thread items with the given ID in the newest revision of every page in which they have
|
|
* appeared.
|
|
*
|
|
* @param string|string[] $itemId
|
|
* @return DatabaseThreadItem[]
|
|
*/
|
|
public function findNewestRevisionsById( $itemId ): array {
|
|
if ( $this->isDisabled() ) {
|
|
return [];
|
|
}
|
|
|
|
$queryBuilder = $this->getIdsNamesBuilder();
|
|
|
|
// First find the name associated with the ID; then find by name. Otherwise we wouldn't find the
|
|
// latest revision in case comment ID changed, e.g. the comment was moved elsewhere on the page.
|
|
$itemNameQueryBuilder = $this->getIdsNamesBuilder()
|
|
->where( [ 'itid_itemid' => $itemId ] )
|
|
->field( 'it_itemname' );
|
|
// I think there may be more than 1 only in case of headings?
|
|
// For comments, any ID corresponds to just 1 name.
|
|
// Not sure how bad it is to not have limit( 1 ) here?
|
|
// It might scan a bunch of rows...
|
|
// ->limit( 1 );
|
|
|
|
$queryBuilder
|
|
->where( [
|
|
'it_itemname IN (' . $itemNameQueryBuilder->getSQL() . ')',
|
|
"it_itemname != 'h-'",
|
|
] );
|
|
|
|
$result = $this->fetchItemsResultSet( $queryBuilder );
|
|
$revs = $this->fetchRevisionAndPageForItems( $result );
|
|
|
|
$threadItems = [];
|
|
foreach ( $result as $row ) {
|
|
$threadItem = $this->getThreadItemFromRow( $row, null, $revs );
|
|
if ( $threadItem ) {
|
|
$threadItems[] = $threadItem;
|
|
}
|
|
}
|
|
return $threadItems;
|
|
}
|
|
|
|
/**
|
|
* @param SelectQueryBuilder $queryBuilder
|
|
* @return IResultWrapper
|
|
*/
|
|
private function fetchItemsResultSet( SelectQueryBuilder $queryBuilder ): IResultWrapper {
|
|
$queryBuilder
|
|
->fields( [
|
|
'itr_id',
|
|
'it_itemname',
|
|
'it_timestamp',
|
|
'it_actor',
|
|
'itid_itemid',
|
|
'itr_parent_id',
|
|
'itr_transcludedfrom',
|
|
'itr_level',
|
|
'itr_headinglevel',
|
|
'itr_revision_id',
|
|
] )
|
|
// PageStore fields for the transcluded-from page
|
|
->leftJoin( 'page', null, [ 'page_id = itr_transcludedfrom' ] )
|
|
->fields( $this->pageStore->getSelectFields() )
|
|
// ActorStore fields for the author
|
|
->leftJoin( 'actor', null, [ 'actor_id = it_actor' ] )
|
|
->fields( [ 'actor_id', 'actor_name', 'actor_user' ] )
|
|
// Parent item ID (the string, not just the primary key)
|
|
->leftJoin(
|
|
$this->getIdsNamesBuilder()
|
|
->fields( [
|
|
'itr_parent__itr_id' => 'itr_id',
|
|
'itr_parent__itid_itemid' => 'itid_itemid',
|
|
] ),
|
|
null,
|
|
[ 'itr_parent_id = itr_parent__itr_id' ]
|
|
)
|
|
->field( 'itr_parent__itid_itemid' );
|
|
|
|
return $queryBuilder->fetchResultSet();
|
|
}
|
|
|
|
/**
|
|
* @param IResultWrapper $result
|
|
* @return stdClass[]
|
|
*/
|
|
private function fetchRevisionAndPageForItems( IResultWrapper $result ): array {
|
|
// This could theoretically be done in the same query as fetchItemsResultSet(),
|
|
// but the resulting query would be two screens long
|
|
// and we'd have to alias a lot of fields to avoid conflicts.
|
|
$revs = [];
|
|
foreach ( $result as $row ) {
|
|
$revs[ $row->itr_revision_id ] = null;
|
|
}
|
|
$revQueryBuilder = $this->loadBalancer->getConnection( DB_REPLICA )->newSelectQueryBuilder()
|
|
->queryInfo( $this->revStore->getQueryInfo( [ 'page' ] ) )
|
|
->fields( $this->pageStore->getSelectFields() )
|
|
->where( $revs ? [ 'rev_id' => array_keys( $revs ) ] : '0=1' );
|
|
$revResult = $revQueryBuilder->fetchResultSet();
|
|
foreach ( $revResult as $row ) {
|
|
$revs[ $row->rev_id ] = $row;
|
|
}
|
|
return $revs;
|
|
}
|
|
|
|
/**
|
|
* @param stdClass $row
|
|
* @param DatabaseThreadItemSet|null $set
|
|
* @param array $revs
|
|
* @return DatabaseThreadItem|null
|
|
*/
|
|
private function getThreadItemFromRow(
|
|
stdClass $row, ?DatabaseThreadItemSet $set, array $revs
|
|
): ?DatabaseThreadItem {
|
|
if ( $revs[ $row->itr_revision_id ] === null ) {
|
|
// We didn't find the 'revision' table row at all, this revision is deleted.
|
|
// (The page may or may not have other non-deleted revisions.)
|
|
// Pretend the thread item doesn't exist to avoid leaking data to users who shouldn't see it.
|
|
// TODO Allow privileged users to see it (we'd need to query from 'archive')
|
|
return null;
|
|
}
|
|
|
|
$revRow = $revs[$row->itr_revision_id];
|
|
$page = $this->pageStore->newPageRecordFromRow( $revRow );
|
|
$rev = $this->revStore->newRevisionFromRow( $revRow );
|
|
if ( $rev->isDeleted( RevisionRecord::DELETED_TEXT ) ) {
|
|
// This revision is revision-deleted.
|
|
// TODO Allow privileged users to see it
|
|
return null;
|
|
}
|
|
|
|
if ( $set && $row->itr_parent__itid_itemid ) {
|
|
$parent = $set->findCommentById( $row->itr_parent__itid_itemid );
|
|
} else {
|
|
$parent = null;
|
|
}
|
|
|
|
$transcludedFrom = $row->itr_transcludedfrom === null ? false : (
|
|
$row->itr_transcludedfrom === '0' ? true :
|
|
$this->titleFormatter->getPrefixedText(
|
|
$this->pageStore->newPageRecordFromRow( $row )
|
|
)
|
|
);
|
|
|
|
if ( $row->it_timestamp !== null && $row->it_actor !== null ) {
|
|
$author = $this->actorStore->newActorFromRow( $row )->getName();
|
|
|
|
$item = new DatabaseCommentItem(
|
|
$page,
|
|
$rev,
|
|
$row->it_itemname,
|
|
$row->itid_itemid,
|
|
$parent,
|
|
$transcludedFrom,
|
|
(int)$row->itr_level,
|
|
$row->it_timestamp,
|
|
$author
|
|
);
|
|
} else {
|
|
$item = new DatabaseHeadingItem(
|
|
$page,
|
|
$rev,
|
|
$row->it_itemname,
|
|
$row->itid_itemid,
|
|
$parent,
|
|
$transcludedFrom,
|
|
(int)$row->itr_level,
|
|
$row->itr_headinglevel === null ? null : (int)$row->itr_headinglevel
|
|
);
|
|
}
|
|
|
|
if ( $parent ) {
|
|
$parent->addReply( $item );
|
|
}
|
|
return $item;
|
|
}
|
|
|
|
/**
|
|
* Find the thread item set for the given revision, assuming that it is the current revision of
|
|
* its page.
|
|
*
|
|
* @param int $revId
|
|
* @return DatabaseThreadItemSet
|
|
*/
|
|
public function findThreadItemsInCurrentRevision( int $revId ): DatabaseThreadItemSet {
|
|
if ( $this->isDisabled() ) {
|
|
return new DatabaseThreadItemSet();
|
|
}
|
|
|
|
$queryBuilder = $this->getIdsNamesBuilder();
|
|
$queryBuilder
|
|
->where( [ 'itr_revision_id' => $revId ] )
|
|
// We must process parents before their children in the loop later
|
|
->orderBy( 'itr_id', SelectQueryBuilder::SORT_ASC );
|
|
|
|
$result = $this->fetchItemsResultSet( $queryBuilder );
|
|
$revs = $this->fetchRevisionAndPageForItems( $result );
|
|
|
|
$set = new DatabaseThreadItemSet();
|
|
foreach ( $result as $row ) {
|
|
$threadItem = $this->getThreadItemFromRow( $row, $set, $revs );
|
|
if ( $threadItem ) {
|
|
$set->addThreadItem( $threadItem );
|
|
$set->updateIdAndNameMaps( $threadItem );
|
|
}
|
|
}
|
|
return $set;
|
|
}
|
|
|
|
/**
|
|
* @return SelectQueryBuilder
|
|
*/
|
|
private function getIdsNamesBuilder(): SelectQueryBuilder {
|
|
$dbr = $this->loadBalancer->getConnection( DB_REPLICA );
|
|
|
|
$queryBuilder = $dbr->newSelectQueryBuilder()
|
|
->from( 'discussiontools_items' )
|
|
->join( 'discussiontools_item_pages', null, [ 'itp_items_id = it_id' ] )
|
|
->join( 'discussiontools_item_revisions', null, [
|
|
'itr_items_id = it_id',
|
|
// Only the latest revision of the items with each name
|
|
'itr_revision_id = itp_newest_revision_id',
|
|
] )
|
|
->join( 'discussiontools_item_ids', null, [ 'itid_id = itr_itemid_id' ] );
|
|
|
|
return $queryBuilder;
|
|
}
|
|
|
|
/**
|
|
* Store the thread item set.
|
|
*
|
|
* @param RevisionRecord $rev
|
|
* @param ThreadItemSet $threadItemSet
|
|
* @return bool
|
|
*/
|
|
public function insertThreadItems( RevisionRecord $rev, ThreadItemSet $threadItemSet ): bool {
|
|
if ( $this->isDisabled() || $this->readOnlyMode->isReadOnly() ) {
|
|
return false;
|
|
}
|
|
|
|
$dbw = $this->loadBalancer->getConnection( DB_PRIMARY );
|
|
$didInsert = false;
|
|
$method = __METHOD__;
|
|
|
|
$dbw->doAtomicSection( $method, function ( $dbw ) use ( $method, $rev, $threadItemSet, &$didInsert ) {
|
|
$itemRevisionsIds = [];
|
|
foreach ( $threadItemSet->getThreadItems() as $item ) {
|
|
$itemIdsId = $dbw->newSelectQueryBuilder()
|
|
->from( 'discussiontools_item_ids' )
|
|
->field( 'itid_id' )
|
|
->where( [ 'itid_itemid' => $item->getId() ] )
|
|
->caller( $method )
|
|
->fetchField();
|
|
if ( $itemIdsId === false ) {
|
|
$dbw->insert(
|
|
'discussiontools_item_ids',
|
|
[
|
|
'itid_itemid' => $item->getId(),
|
|
],
|
|
$method
|
|
);
|
|
$itemIdsId = $dbw->insertId();
|
|
$didInsert = true;
|
|
}
|
|
|
|
$itemsId = $dbw->newSelectQueryBuilder()
|
|
->from( 'discussiontools_items' )
|
|
->field( 'it_id' )
|
|
->where( [ 'it_itemname' => $item->getName() ] )
|
|
->caller( $method )
|
|
->fetchField();
|
|
if ( $itemsId === false ) {
|
|
$dbw->insert(
|
|
'discussiontools_items',
|
|
[
|
|
'it_itemname' => $item->getName(),
|
|
] +
|
|
( $item instanceof CommentItem ? [
|
|
'it_timestamp' =>
|
|
$dbw->timestamp( $item->getTimestampString() ),
|
|
'it_actor' =>
|
|
$this->actorStore->findActorIdByName( $item->getAuthor(), $dbw ),
|
|
] : [] ),
|
|
$method
|
|
);
|
|
$itemsId = $dbw->insertId();
|
|
$didInsert = true;
|
|
}
|
|
|
|
$itemRevisionsId = $dbw->newSelectQueryBuilder()
|
|
->from( 'discussiontools_item_revisions' )
|
|
->field( 'itr_id' )
|
|
->where( [
|
|
'itr_itemid_id' => $itemIdsId,
|
|
'itr_revision_id' => $rev->getId(),
|
|
] )
|
|
->caller( $method )
|
|
->fetchField();
|
|
if ( $itemRevisionsId === false ) {
|
|
$transcl = $item->getTranscludedFrom();
|
|
$dbw->insert(
|
|
'discussiontools_item_revisions',
|
|
[
|
|
'itr_itemid_id' => $itemIdsId,
|
|
'itr_revision_id' => $rev->getId(),
|
|
'itr_items_id' => $itemsId,
|
|
'itr_parent_id' =>
|
|
// This assumes that parent items were processed first
|
|
$item->getParent() ? $itemRevisionsIds[ $item->getParent()->getId() ] : null,
|
|
'itr_transcludedfrom' =>
|
|
$transcl === false ? null : (
|
|
$transcl === true ? 0 :
|
|
$this->pageStore->getPageByText( $transcl )->getId()
|
|
),
|
|
'itr_level' => $item->getLevel(),
|
|
] +
|
|
( $item instanceof HeadingItem ? [
|
|
'itr_headinglevel' => $item->isPlaceholderHeading() ? null : $item->getHeadingLevel(),
|
|
] : [] ),
|
|
$method
|
|
);
|
|
$itemRevisionsId = $dbw->insertId();
|
|
$didInsert = true;
|
|
}
|
|
$itemRevisionsIds[ $item->getId() ] = $itemRevisionsId;
|
|
|
|
// Update (or insert) the references to oldest/newest item revision.
|
|
// The page revision we're processing is usually the newest one, but it doesn't have to be
|
|
// (in case of backfilling using the maintenance script, or in case of revisions being
|
|
// imported), so we need all these funky queries to see if we need to update oldest/newest.
|
|
|
|
// This should be a single upsert query (INSERT ... ON DUPLICATE KEY UPDATE), however it
|
|
// doesn't work in practice:
|
|
//
|
|
// - Attempt 1:
|
|
// https://gerrit.wikimedia.org/r/c/mediawiki/extensions/DiscussionTools/+/771974/14/includes/ThreadItemStore.php#451
|
|
//
|
|
// This is the same logic as below in SQL: only doing a single comparison of the timestamp
|
|
// of the current revision to the existing data in discussiontools_item_pages.
|
|
// It worked great on my machine, `mysql --version`:
|
|
// mysql Ver 8.0.29-0ubuntu0.20.04.3 for Linux on x86_64 ((Ubuntu))
|
|
// but it failed in Wikimedia CI, `mysql --version`:
|
|
// mysql Ver 15.1 Distrib 10.3.34-MariaDB, for debian-linux-gnu (x86_64) using readline 5.2
|
|
// …with the error:
|
|
// "Error 1054: Unknown column 'itp_oldest_revision_id' in 'where clause'".
|
|
// Apparently it doesn't like dependent subqueries in the UPDATE part of an upsert.
|
|
// I'm not sure if it's a bug in MariaDB or if you're not supposed to do that.
|
|
//
|
|
// - Attempt 2:
|
|
// https://gerrit.wikimedia.org/r/c/mediawiki/extensions/DiscussionTools/+/771974/15/includes/ThreadItemStore.php#451
|
|
//
|
|
// This avoids the dependent subquery: instead of comparing to the existing data in
|
|
// discussiontools_item_pages, it just takes the IDs with min/max timestamp from
|
|
// discussiontools_item_revisions/revision. This should be a simple lookup from an index,
|
|
// but apparently it doesn't work that way and is significantly slower (the maintenance
|
|
// script went from 13 minutes to 18 minutes when processing a few thousands of revisions
|
|
// on my local testing wiki).
|
|
//
|
|
// In the end, the solution below using multiple queries is just as fast as the original,
|
|
// and only a little more verbose.
|
|
|
|
$itemPagesRow = $dbw->newSelectQueryBuilder()
|
|
->from( 'discussiontools_item_pages' )
|
|
->join( 'revision', 'revision_oldest', [ 'itp_oldest_revision_id = revision_oldest.rev_id' ] )
|
|
->join( 'revision', 'revision_newest', [ 'itp_newest_revision_id = revision_newest.rev_id' ] )
|
|
->field( 'itp_id' )
|
|
->field( 'revision_oldest.rev_timestamp', 'oldest_rev_timestamp' )
|
|
->field( 'revision_newest.rev_timestamp', 'newest_rev_timestamp' )
|
|
->where( [
|
|
'itp_items_id' => $itemsId,
|
|
'itp_page_id' => $rev->getPageId(),
|
|
] )
|
|
->fetchRow();
|
|
if ( $itemPagesRow === false ) {
|
|
$dbw->insert(
|
|
'discussiontools_item_pages',
|
|
[
|
|
'itp_items_id' => $itemsId,
|
|
'itp_page_id' => $rev->getPageId(),
|
|
'itp_oldest_revision_id' => $rev->getId(),
|
|
'itp_newest_revision_id' => $rev->getId(),
|
|
],
|
|
$method
|
|
);
|
|
} else {
|
|
$existingTime = ( new MWTimestamp( $itemPagesRow->oldest_rev_timestamp ) )->getTimestamp( TS_MW );
|
|
if ( $existingTime >= $rev->getTimestamp() ) {
|
|
$dbw->update(
|
|
'discussiontools_item_pages',
|
|
[ 'itp_oldest_revision_id' => $rev->getId() ],
|
|
[ 'itp_id' => $itemPagesRow->itp_id ],
|
|
$method
|
|
);
|
|
}
|
|
$existingTime = ( new MWTimestamp( $itemPagesRow->newest_rev_timestamp ) )->getTimestamp( TS_MW );
|
|
if ( $existingTime <= $rev->getTimestamp() ) {
|
|
$dbw->update(
|
|
'discussiontools_item_pages',
|
|
[ 'itp_newest_revision_id' => $rev->getId() ],
|
|
[ 'itp_id' => $itemPagesRow->itp_id ],
|
|
$method
|
|
);
|
|
}
|
|
}
|
|
|
|
// Delete rows that we don't care about, to save space (item revisions with the same ID and
|
|
// name as the one we just inserted, which are not the oldest or newest revision).
|
|
$oldestRevisionSql = $dbw->newSelectQueryBuilder()
|
|
->from( 'discussiontools_item_pages' )
|
|
->field( 'itp_oldest_revision_id' )
|
|
->where( [ 'itp_items_id' => $itemsId ] )
|
|
->caller( $method )
|
|
->getSQL();
|
|
$newestRevisionSql = $dbw->newSelectQueryBuilder()
|
|
->from( 'discussiontools_item_pages' )
|
|
->field( 'itp_newest_revision_id' )
|
|
->where( [ 'itp_items_id' => $itemsId ] )
|
|
->caller( $method )
|
|
->getSQL();
|
|
$dbw->delete(
|
|
'discussiontools_item_revisions',
|
|
[
|
|
'itr_itemid_id' => $itemIdsId,
|
|
'itr_items_id' => $itemsId,
|
|
"itr_revision_id NOT IN ($oldestRevisionSql)",
|
|
"itr_revision_id NOT IN ($newestRevisionSql)",
|
|
],
|
|
$method
|
|
);
|
|
}
|
|
}, $dbw::ATOMIC_CANCELABLE );
|
|
|
|
return $didInsert;
|
|
}
|
|
}
|