wikimedia / mediawiki

maintenance/dumpIterator.php

<?php

For compatibility and reusability of your code, PSR1 recommends that a file should introduce either new symbols (like classes, functions, etc.) or have side-effects (like outputting something, or including other files), but not both at the same time. The first symbol is defined on line 36 and the first side effect is on line 29.

/**
 * Take page text out of an XML dump file and perform some operation on it.
 * Used as a base class for CompareParsers and PreprocessDump.
 * We implement below the simple task of searching inside a dump.
 *
 * Copyright © 2011 Platonides
 * https://www.mediawiki.org/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 * @ingroup Maintenance
 */

require_once __DIR__ . '/Maintenance.php';

/**
 * Base class for interating over a dump.
 *
 * @ingroup Maintenance
 */
abstract class DumpIterator extends Maintenance {

	private $count = 0;
	private $startTime;

	public function __construct() {
		parent::__construct();
		$this->addDescription( 'Does something with a dump' );
		$this->addOption( 'file', 'File with text to run.', false, true );
		$this->addOption( 'dump', 'XML dump to execute all revisions.', false, true );
		$this->addOption( 'from', 'Article from XML dump to start from.', false, true );
	}

	public function execute() {
		if ( !( $this->hasOption( 'file' ) ^ $this->hasOption( 'dump' ) ) ) {
			$this->error( "You must provide a file or dump", true );
		}

		$this->checkOptions();

		if ( $this->hasOption( 'file' ) ) {
			$revision = new WikiRevision( $this->getConfig() );

			$revision->setText( file_get_contents( $this->getOption( 'file' ) ) );
			$revision->setTitle( Title::newFromText(

It seems like \Title::newFromText(rawurldecode(basename($this->getOption('file'), '.txt'))) can be null; however, setTitle() does not accept null, maybe add an additional type check?

				rawurldecode( basename( $this->getOption( 'file' ), '.txt' ) )
			) );
			$this->handleRevision( $revision );

			return;
		}

		$this->startTime = microtime( true );

		if ( $this->getOption( 'dump' ) == '-' ) {
			$source = new ImportStreamSource( $this->getStdin() );
		} else {
			$this->error( "Sorry, I don't support dump filenames yet. "
				. "Use - and provide it on stdin on the meantime.", true );
		}
		$importer = new WikiImporter( $source, $this->getConfig() );

The variable $source does not seem to be defined for all execution paths leading up to this point.

		$importer->setRevisionCallback(
			[ $this, 'handleRevision' ] );

		$this->from = $this->getOption( 'from', null );

The property from does not exist. Did you maybe forget to declare it?

		$this->count = 0;
		$importer->doImport();

		$this->conclusions();

		$delta = microtime( true ) - $this->startTime;
		$this->error( "Done {$this->count} revisions in " . round( $delta, 2 ) . " seconds " );
		if ( $delta > 0 ) {
			$this->error( round( $this->count / $delta, 2 ) . " pages/sec" );
		}

		# Perform the memory_get_peak_usage() when all the other data has been
		# output so there's no damage if it dies. It is only available since
		# 5.2.0 (since 5.2.1 if you haven't compiled with --enable-memory-limit)
		$this->error( "Memory peak usage of " . memory_get_peak_usage() . " bytes\n" );
	}

	public function finalSetup() {
		parent::finalSetup();

		if ( $this->getDbType() == Maintenance::DB_NONE ) {
			global $wgUseDatabaseMessages, $wgLocalisationCacheConf, $wgHooks;
			$wgUseDatabaseMessages = false;
			$wgLocalisationCacheConf['storeClass'] = 'LCStoreNull';
			$wgHooks['InterwikiLoadPrefix'][] = 'DumpIterator::disableInterwikis';
		}
	}

	static function disableInterwikis( $prefix, &$data ) {
		# Title::newFromText will check on each namespaced article if it's an interwiki.
		# We always answer that it is not.

		return false;
	}

	/**
	 * Callback function for each revision, child classes should override
	 * processRevision instead.
	 * @param Database $rev
	 */
	public function handleRevision( $rev ) {
		$title = $rev->getTitle();

The method getTitle() does not seem to exist on object<Database>.

		if ( !$title ) {
			$this->error( "Got bogus revision with null title!" );

			return;
		}

		$this->count++;
		if ( isset( $this->from ) ) {
			if ( $this->from != $title ) {
				return;
			}
			$this->output( "Skipped " . ( $this->count - 1 ) . " pages\n" );

			$this->count = 1;
			$this->from = null;
		}

		$this->processRevision( $rev );
	}

	/* Stub function for processing additional options */
	public function checkOptions() {
		return;
	}

	/* Stub function for giving data about what was computed */
	public function conclusions() {
		return;
	}

	/* Core function which does whatever the maintenance script is designed to do */
	abstract public function processRevision( $rev );
}

/**
 * Maintenance script that runs a regex in the revisions from a dump.
 *
 * @ingroup Maintenance
 */
class SearchDump extends DumpIterator {

	public function __construct() {
		parent::__construct();
		$this->addDescription( 'Runs a regex in the revisions from a dump' );
		$this->addOption( 'regex', 'Searching regex', true, true );
	}

	public function getDbType() {
		return Maintenance::DB_NONE;
	}

	/**
	 * @param Revision $rev
	 */
	public function processRevision( $rev ) {
		if ( preg_match( $this->getOption( 'regex' ), $rev->getContent()->getTextForSearchIndex() ) ) {
			$this->output( $rev->getTitle() . " matches at edit from " . $rev->getTimestamp() . "\n" );
		}
	}
}

$maintClass = "SearchDump";
require_once RUN_MAINTENANCE_IF_MAIN;