ApiQueryAllPages.php

Go to the documentation of this file.

<?php
class ApiQueryAllPages extends ApiQueryGeneratorBase {
 
    public function __construct( ApiQuery $query, $moduleName ) {
        parent::__construct( $query, $moduleName, 'ap' );
    }
 
    public function execute() {
        $this->run();
    }
 
    public function getCacheMode( $params ) {
        return 'public';
    }
 
    public function executeGenerator( $resultPageSet ) {
        if ( $resultPageSet->isResolvingRedirects() ) {
            $this->dieUsage(
                'Use "gapfilterredir=nonredirects" option instead of "redirects" ' .
                    'when using allpages as a generator',
                'params'
            );
        }
 
        $this->run( $resultPageSet );
    }
 
    private function run( $resultPageSet = null ) {
        $db = $this->getDB();
 
        $params = $this->extractRequestParams();
 
        // Page filters
        $this->addTables( 'page' );
 
        if ( !is_null( $params['continue'] ) ) {
            $cont = explode( '|', $params['continue'] );
            $this->dieContinueUsageIf( count( $cont ) != 1 );
            $op = $params['dir'] == 'descending' ? '<' : '>';
            $cont_from = $db->addQuotes( $cont[0] );
            $this->addWhere( "page_title $op= $cont_from" );
        }
 
        if ( $params['filterredir'] == 'redirects' ) {
            $this->addWhereFld( 'page_is_redirect', 1 );
        } elseif ( $params['filterredir'] == 'nonredirects' ) {
            $this->addWhereFld( 'page_is_redirect', 0 );
        }
 
        $this->addWhereFld( 'page_namespace', $params['namespace'] );
        $dir = ( $params['dir'] == 'descending' ? 'older' : 'newer' );
        $from = ( $params['from'] === null
            ? null
            : $this->titlePartToKey( $params['from'], $params['namespace'] ) );
        $to = ( $params['to'] === null
            ? null
            : $this->titlePartToKey( $params['to'], $params['namespace'] ) );
        $this->addWhereRange( 'page_title', $dir, $from, $to );
 
        if ( isset( $params['prefix'] ) ) {
            $this->addWhere( 'page_title' . $db->buildLike(
                $this->titlePartToKey( $params['prefix'], $params['namespace'] ),
                $db->anyString() ) );
        }
 
        if ( is_null( $resultPageSet ) ) {
            $selectFields = [
                'page_namespace',
                'page_title',
                'page_id'
            ];
        } else {
            $selectFields = $resultPageSet->getPageTableFields();
        }
 
        $this->addFields( $selectFields );
        $forceNameTitleIndex = true;
        if ( isset( $params['minsize'] ) ) {
            $this->addWhere( 'page_len>=' . intval( $params['minsize'] ) );
            $forceNameTitleIndex = false;
        }
 
        if ( isset( $params['maxsize'] ) ) {
            $this->addWhere( 'page_len<=' . intval( $params['maxsize'] ) );
            $forceNameTitleIndex = false;
        }
 
        // Page protection filtering
        if ( count( $params['prtype'] ) || $params['prexpiry'] != 'all' ) {
            $this->addTables( 'page_restrictions' );
            $this->addWhere( 'page_id=pr_page' );
            $this->addWhere( "pr_expiry > {$db->addQuotes( $db->timestamp() )} OR pr_expiry IS NULL" );
 
            if ( count( $params['prtype'] ) ) {
                $this->addWhereFld( 'pr_type', $params['prtype'] );
 
                if ( isset( $params['prlevel'] ) ) {
                    // Remove the empty string and '*' from the prlevel array
                    $prlevel = array_diff( $params['prlevel'], [ '', '*' ] );
 
                    if ( count( $prlevel ) ) {
                        $this->addWhereFld( 'pr_level', $prlevel );
                    }
                }
                if ( $params['prfiltercascade'] == 'cascading' ) {
                    $this->addWhereFld( 'pr_cascade', 1 );
                } elseif ( $params['prfiltercascade'] == 'noncascading' ) {
                    $this->addWhereFld( 'pr_cascade', 0 );
                }
            }
            $forceNameTitleIndex = false;
 
            if ( $params['prexpiry'] == 'indefinite' ) {
                $this->addWhere( "pr_expiry = {$db->addQuotes( $db->getInfinity() )} OR pr_expiry IS NULL" );
            } elseif ( $params['prexpiry'] == 'definite' ) {
                $this->addWhere( "pr_expiry != {$db->addQuotes( $db->getInfinity() )}" );
            }
 
            $this->addOption( 'DISTINCT' );
        } elseif ( isset( $params['prlevel'] ) ) {
            $this->dieUsage( 'prlevel may not be used without prtype', 'params' );
        }
 
        if ( $params['filterlanglinks'] == 'withoutlanglinks' ) {
            $this->addTables( 'langlinks' );
            $this->addJoinConds( [ 'langlinks' => [ 'LEFT JOIN', 'page_id=ll_from' ] ] );
            $this->addWhere( 'll_from IS NULL' );
            $forceNameTitleIndex = false;
        } elseif ( $params['filterlanglinks'] == 'withlanglinks' ) {
            $this->addTables( 'langlinks' );
            $this->addWhere( 'page_id=ll_from' );
            $this->addOption( 'STRAIGHT_JOIN' );
 
            // MySQL filesorts if we use a GROUP BY that works with the rules
            // in the 1992 SQL standard (it doesn't like having the
            // constant-in-WHERE page_namespace column in there). Using the
            // 1999 rules works fine, but that breaks other DBs. Sigh.
            $dbType = $db->getType();
            if ( $dbType === 'mysql' || $dbType === 'sqlite' ) {
                // Ignore the rules, or 1999 rules if you count unique keys
                // over non-NULL columns as satisfying the requirement for
                // "functional dependency" and don't require including
                // constant-in-WHERE columns in the GROUP BY.
                $this->addOption( 'GROUP BY', [ 'page_title' ] );
            } elseif ( $dbType === 'postgres' && $db->getServerVersion() >= 9.1 ) {
                // 1999 rules only counting primary keys
                $this->addOption( 'GROUP BY', [ 'page_title', 'page_id' ] );
            } else {
                // 1992 rules
                $this->addOption( 'GROUP BY', $selectFields );
            }
 
            $forceNameTitleIndex = false;
        }
 
        if ( $forceNameTitleIndex ) {
            $this->addOption( 'USE INDEX', 'name_title' );
        }
 
        $limit = $params['limit'];
        $this->addOption( 'LIMIT', $limit + 1 );
        $res = $this->select( __METHOD__ );
 
        // Get gender information
        if ( MWNamespace::hasGenderDistinction( $params['namespace'] ) ) {
            $users = [];
            foreach ( $res as $row ) {
                $users[] = $row->page_title;
            }
            GenderCache::singleton()->doQuery( $users, __METHOD__ );
            $res->rewind(); // reset
        }
 
        $count = 0;
        $result = $this->getResult();
        foreach ( $res as $row ) {
            if ( ++$count > $limit ) {
                // We've reached the one extra which shows that there are
                // additional pages to be had. Stop here...
                $this->setContinueEnumParameter( 'continue', $row->page_title );
                break;
            }
 
            if ( is_null( $resultPageSet ) ) {
                $title = Title::makeTitle( $row->page_namespace, $row->page_title );
                $vals = [
                    'pageid' => intval( $row->page_id ),
                    'ns' => intval( $title->getNamespace() ),
                    'title' => $title->getPrefixedText()
                ];
                $fit = $result->addValue( [ 'query', $this->getModuleName() ], null, $vals );
                if ( !$fit ) {
                    $this->setContinueEnumParameter( 'continue', $row->page_title );
                    break;
                }
            } else {
                $resultPageSet->processDbRow( $row );
            }
        }
 
        if ( is_null( $resultPageSet ) ) {
            $result->addIndexedTagName( [ 'query', $this->getModuleName() ], 'p' );
        }
    }
 
    public function getAllowedParams() {
        return [
            'from' => null,
            'continue' => [
                ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
            ],
            'to' => null,
            'prefix' => null,
            'namespace' => [
                ApiBase::PARAM_DFLT => NS_MAIN,
                ApiBase::PARAM_TYPE => 'namespace',
            ],
            'filterredir' => [
                ApiBase::PARAM_DFLT => 'all',
                ApiBase::PARAM_TYPE => [
                    'all',
                    'redirects',
                    'nonredirects'
                ]
            ],
            'minsize' => [
                ApiBase::PARAM_TYPE => 'integer',
            ],
            'maxsize' => [
                ApiBase::PARAM_TYPE => 'integer',
            ],
            'prtype' => [
                ApiBase::PARAM_TYPE => Title::getFilteredRestrictionTypes( true ),
                ApiBase::PARAM_ISMULTI => true
            ],
            'prlevel' => [
                ApiBase::PARAM_TYPE => $this->getConfig()->get( 'RestrictionLevels' ),
                ApiBase::PARAM_ISMULTI => true
            ],
            'prfiltercascade' => [
                ApiBase::PARAM_DFLT => 'all',
                ApiBase::PARAM_TYPE => [
                    'cascading',
                    'noncascading',
                    'all'
                ],
            ],
            'limit' => [
                ApiBase::PARAM_DFLT => 10,
                ApiBase::PARAM_TYPE => 'limit',
                ApiBase::PARAM_MIN => 1,
                ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
                ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
            ],
            'dir' => [
                ApiBase::PARAM_DFLT => 'ascending',
                ApiBase::PARAM_TYPE => [
                    'ascending',
                    'descending'
                ]
            ],
            'filterlanglinks' => [
                ApiBase::PARAM_TYPE => [
                    'withlanglinks',
                    'withoutlanglinks',
                    'all'
                ],
                ApiBase::PARAM_DFLT => 'all'
            ],
            'prexpiry' => [
                ApiBase::PARAM_TYPE => [
                    'indefinite',
                    'definite',
                    'all'
                ],
                ApiBase::PARAM_DFLT => 'all'
            ],
        ];
    }
 
    protected function getExamplesMessages() {
        return [
            'action=query&list=allpages&apfrom=B'
                => 'apihelp-query+allpages-example-B',
            'action=query&generator=allpages&gaplimit=4&gapfrom=T&prop=info'
                => 'apihelp-query+allpages-example-generator',
            'action=query&generator=allpages&gaplimit=2&' .
                'gapfilterredir=nonredirects&gapfrom=Re&prop=revisions&rvprop=content'
                => 'apihelp-query+allpages-example-generator-revisions',
        ];
    }
 
    public function getHelpUrls() {
        return 'https://www.mediawiki.org/wiki/API:Allpages';
    }
}