ApiQueryAllRevisions.php

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<?php
use MediaWiki\MediaWikiServices;
use MediaWiki\Revision\RevisionRecord;
 
class ApiQueryAllRevisions extends ApiQueryRevisionsBase {
 
    public function __construct( ApiQuery $query, $moduleName ) {
        parent::__construct( $query, $moduleName, 'arv' );
    }
 
    protected function run( ApiPageSet $resultPageSet = null ) {
        $db = $this->getDB();
        $params = $this->extractRequestParams( false );
        $services = MediaWikiServices::getInstance();
        $revisionStore = $services->getRevisionStore();
 
        $result = $this->getResult();
 
        $this->requireMaxOneParameter( $params, 'user', 'excludeuser' );
 
        $tsField = 'rev_timestamp';
        $idField = 'rev_id';
        $pageField = 'rev_page';
        if ( $params['user'] !== null ) {
            // The query is probably best done using the actor_timestamp index on
            // revision_actor_temp. Use the denormalized fields from that table.
            $tsField = 'revactor_timestamp';
            $idField = 'revactor_rev';
            $pageField = 'revactor_page';
        }
 
        // Namespace check is likely to be desired, but can't be done
        // efficiently in SQL.
        $miser_ns = null;
        $needPageTable = false;
        if ( $params['namespace'] !== null ) {
            $params['namespace'] = array_unique( $params['namespace'] );
            sort( $params['namespace'] );
            if ( $params['namespace'] != $services->getNamespaceInfo()->getValidNamespaces() ) {
                $needPageTable = true;
                if ( $this->getConfig()->get( 'MiserMode' ) ) {
                    $miser_ns = $params['namespace'];
                } else {
                    $this->addWhere( [ 'page_namespace' => $params['namespace'] ] );
                }
            }
        }
 
        if ( $resultPageSet === null ) {
            $this->parseParameters( $params );
            $revQuery = $revisionStore->getQueryInfo( [ 'page' ] );
        } else {
            $this->limit = $this->getParameter( 'limit' ) ?: 10;
            $revQuery = [
                'tables' => [ 'revision' ],
                'fields' => [ 'rev_timestamp', 'rev_id' ],
                'joins' => [],
            ];
 
            if ( $params['generatetitles'] ) {
                $revQuery['fields'][] = 'rev_page';
            }
 
            if ( $params['user'] !== null || $params['excludeuser'] !== null ) {
                $actorQuery = ActorMigration::newMigration()->getJoin( 'rev_user' );
                $revQuery['tables'] += $actorQuery['tables'];
                $revQuery['joins'] += $actorQuery['joins'];
            }
 
            if ( $needPageTable ) {
                $revQuery['tables'][] = 'page';
                $revQuery['joins']['page'] = [ 'JOIN', [ "$pageField = page_id" ] ];
                if ( (bool)$miser_ns ) {
                    $revQuery['fields'][] = 'page_namespace';
                }
            }
        }
 
        // If we're going to be using actor_timestamp, we need to swap the order of `revision`
        // and `revision_actor_temp` in the query (for the straight join) and adjust some field aliases.
        if ( $idField !== 'rev_id' && isset( $revQuery['tables']['temp_rev_user'] ) ) {
            $aliasFields = [ 'rev_id' => $idField, 'rev_timestamp' => $tsField, 'rev_page' => $pageField ];
            $revQuery['fields'] = array_merge(
                $aliasFields,
                array_diff( $revQuery['fields'], array_keys( $aliasFields ) )
            );
            unset( $revQuery['tables']['temp_rev_user'] );
            $revQuery['tables'] = array_merge(
                [ 'temp_rev_user' => 'revision_actor_temp' ],
                $revQuery['tables']
            );
            $revQuery['joins']['revision'] = $revQuery['joins']['temp_rev_user'];
            unset( $revQuery['joins']['temp_rev_user'] );
        }
 
        $this->addTables( $revQuery['tables'] );
        $this->addFields( $revQuery['fields'] );
        $this->addJoinConds( $revQuery['joins'] );
 
        // Seems to be needed to avoid a planner bug (T113901)
        $this->addOption( 'STRAIGHT_JOIN' );
 
        $dir = $params['dir'];
        $this->addTimestampWhereRange( $tsField, $dir, $params['start'], $params['end'] );
 
        if ( $this->fld_tags ) {
            $this->addFields( [ 'ts_tags' => ChangeTags::makeTagSummarySubquery( 'revision' ) ] );
        }
 
        if ( $params['user'] !== null ) {
            $actorQuery = ActorMigration::newMigration()
                ->getWhere( $db, 'rev_user', User::newFromName( $params['user'], false ) );
            $this->addWhere( $actorQuery['conds'] );
        } elseif ( $params['excludeuser'] !== null ) {
            $actorQuery = ActorMigration::newMigration()
                ->getWhere( $db, 'rev_user', User::newFromName( $params['excludeuser'], false ) );
            $this->addWhere( 'NOT(' . $actorQuery['conds'] . ')' );
        }
 
        if ( $params['user'] !== null || $params['excludeuser'] !== null ) {
            // Paranoia: avoid brute force searches (T19342)
            if ( !$this->getPermissionManager()->userHasRight( $this->getUser(), 'deletedhistory' ) ) {
                $bitmask = RevisionRecord::DELETED_USER;
            } elseif ( !$this->getPermissionManager()
                ->userHasAnyRight( $this->getUser(), 'suppressrevision', 'viewsuppressed' )
            ) {
                $bitmask = RevisionRecord::DELETED_USER | RevisionRecord::DELETED_RESTRICTED;
            } else {
                $bitmask = 0;
            }
            if ( $bitmask ) {
                $this->addWhere( $db->bitAnd( 'rev_deleted', $bitmask ) . " != $bitmask" );
            }
        }
 
        if ( $params['continue'] !== null ) {
            $op = ( $dir == 'newer' ? '>' : '<' );
            $cont = explode( '|', $params['continue'] );
            $this->dieContinueUsageIf( count( $cont ) != 2 );
            $ts = $db->addQuotes( $db->timestamp( $cont[0] ) );
            $rev_id = (int)$cont[1];
            $this->dieContinueUsageIf( strval( $rev_id ) !== $cont[1] );
            $this->addWhere( "$tsField $op $ts OR " .
                "($tsField = $ts AND " .
                "$idField $op= $rev_id)" );
        }
 
        $this->addOption( 'LIMIT', $this->limit + 1 );
 
        $sort = ( $dir == 'newer' ? '' : ' DESC' );
        $orderby = [];
        // Targeting index rev_timestamp, user_timestamp, usertext_timestamp, or actor_timestamp.
        // But 'user' is always constant for the latter three, so it doesn't matter here.
        $orderby[] = "rev_timestamp $sort";
        $orderby[] = "rev_id $sort";
        $this->addOption( 'ORDER BY', $orderby );
 
        $hookData = [];
        $res = $this->select( __METHOD__, [], $hookData );
        $pageMap = []; // Maps rev_page to array index
        $count = 0;
        $nextIndex = 0;
        $generated = [];
        foreach ( $res as $row ) {
            if ( $count === 0 && $resultPageSet !== null ) {
                // Set the non-continue since the list of all revisions is
                // prone to having entries added at the start frequently.
                $this->getContinuationManager()->addGeneratorNonContinueParam(
                    $this, 'continue', "$row->rev_timestamp|$row->rev_id"
                );
            }
            if ( ++$count > $this->limit ) {
                // We've had enough
                $this->setContinueEnumParameter( 'continue', "$row->rev_timestamp|$row->rev_id" );
                break;
            }
 
            // Miser mode namespace check
            if ( $miser_ns !== null && !in_array( $row->page_namespace, $miser_ns ) ) {
                continue;
            }
 
            if ( $resultPageSet !== null ) {
                if ( $params['generatetitles'] ) {
                    $generated[$row->rev_page] = $row->rev_page;
                } else {
                    $generated[] = $row->rev_id;
                }
            } else {
                $revision = $revisionStore->newRevisionFromRow( $row );
                $rev = $this->extractRevisionInfo( $revision, $row );
 
                if ( !isset( $pageMap[$row->rev_page] ) ) {
                    $index = $nextIndex++;
                    $pageMap[$row->rev_page] = $index;
                    $title = Title::newFromLinkTarget( $revision->getPageAsLinkTarget() );
                    $a = [
                        'pageid' => $title->getArticleID(),
                        'revisions' => [ $rev ],
                    ];
                    ApiResult::setIndexedTagName( $a['revisions'], 'rev' );
                    ApiQueryBase::addTitleInfo( $a, $title );
                    $fit = $this->processRow( $row, $a['revisions'][0], $hookData ) &&
                        $result->addValue( [ 'query', $this->getModuleName() ], $index, $a );
                } else {
                    $index = $pageMap[$row->rev_page];
                    $fit = $this->processRow( $row, $rev, $hookData ) &&
                        $result->addValue( [ 'query', $this->getModuleName(), $index, 'revisions' ], null, $rev );
                }
                if ( !$fit ) {
                    $this->setContinueEnumParameter( 'continue', "$row->rev_timestamp|$row->rev_id" );
                    break;
                }
            }
        }
 
        if ( $resultPageSet !== null ) {
            if ( $params['generatetitles'] ) {
                $resultPageSet->populateFromPageIDs( $generated );
            } else {
                $resultPageSet->populateFromRevisionIDs( $generated );
            }
        } else {
            $result->addIndexedTagName( [ 'query', $this->getModuleName() ], 'page' );
        }
    }
 
    public function getAllowedParams() {
        $ret = parent::getAllowedParams() + [
            'user' => [
                ApiBase::PARAM_TYPE => 'user',
            ],
            'namespace' => [
                ApiBase::PARAM_ISMULTI => true,
                ApiBase::PARAM_TYPE => 'namespace',
                ApiBase::PARAM_DFLT => null,
            ],
            'start' => [
                ApiBase::PARAM_TYPE => 'timestamp',
            ],
            'end' => [
                ApiBase::PARAM_TYPE => 'timestamp',
            ],
            'dir' => [
                ApiBase::PARAM_TYPE => [
                    'newer',
                    'older'
                ],
                ApiBase::PARAM_DFLT => 'older',
                ApiBase::PARAM_HELP_MSG => 'api-help-param-direction',
            ],
            'excludeuser' => [
                ApiBase::PARAM_TYPE => 'user',
            ],
            'continue' => [
                ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
            ],
            'generatetitles' => [
                ApiBase::PARAM_DFLT => false,
            ],
        ];
 
        if ( $this->getConfig()->get( 'MiserMode' ) ) {
            $ret['namespace'][ApiBase::PARAM_HELP_MSG_APPEND] = [
                'api-help-param-limited-in-miser-mode',
            ];
        }
 
        return $ret;
    }
 
    protected function getExamplesMessages() {
        return [
            'action=query&list=allrevisions&arvuser=Example&arvlimit=50'
                => 'apihelp-query+allrevisions-example-user',
            'action=query&list=allrevisions&arvdir=newer&arvlimit=50'
                => 'apihelp-query+allrevisions-example-ns-main',
        ];
    }
 
    public function getHelpUrls() {
        return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Allrevisions';
    }
}