<?php
/**
 * MediaWiki page data importer.
 *
 * Copyright © 2003,2005 Brion Vibber <brion@pobox.com>
 * 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 SpecialPage
 */
use MediaWiki\Logger\LoggerFactory;
use MediaWiki\MediaWikiServices;

/**
 * Represents a revision, log entry or upload during the import process.
 * This class sticks closely to the structure of the XML dump.
 *
 * @since 1.2
 *
 * @ingroup SpecialPage
 */
class WikiRevision implements ImportableUploadRevision, ImportableOldRevision {

	/**
	 * @since 1.17
	 * @deprecated in 1.29. Unused.
	 * @note Introduced in 9b3128eb2b654761f21fd4ca1d5a1a4b796dc912, unused there, unused now.
	 */
	public $importer = null;

	/**
	 * @since 1.2
	 * @var Title
	 */
	public $title = null;

	/**
	 * @since 1.6.4
	 * @var int
	 */
	public $id = 0;

	/**
	 * @since 1.2
	 * @var string
	 */
	public $timestamp = "20010115000000";

	/**
	 * @since 1.2
	 * @var int
	 * @deprecated in 1.29. Unused.
	 * @note Introduced in 436a028086fb3f01c4605c5ad2964d56f9306aca, unused there, unused now.
	 */
	public $user = 0;

	/**
	 * @since 1.2
	 * @var string
	 */
	public $user_text = "";

	/**
	 * @since 1.27
	 * @var User
	 */
	public $userObj = null;

	/**
	 * @since 1.21
	 * @var string
	 */
	public $model = null;

	/**
	 * @since 1.21
	 * @var string
	 */
	public $format = null;

	/**
	 * @since 1.2
	 * @var string
	 */
	public $text = "";

	/**
	 * @since 1.12.2
	 * @var int
	 */
	protected $size;

	/**
	 * @since 1.21
	 * @var Content
	 */
	public $content = null;

	/**
	 * @since 1.24
	 * @var ContentHandler
	 */
	protected $contentHandler = null;

	/**
	 * @since 1.2.6
	 * @var string
	 */
	public $comment = "";

	/**
	 * @since 1.5.7
	 * @var bool
	 */
	public $minor = false;

	/**
	 * @since 1.12.2
	 * @var string
	 */
	public $type = "";

	/**
	 * @since 1.12.2
	 * @var string
	 */
	public $action = "";

	/**
	 * @since 1.12.2
	 * @var string
	 */
	public $params = "";

	/**
	 * @since 1.17
	 * @var string
	 */
	public $fileSrc = '';

	/**
	 * @since 1.17
	 * @var bool|string
	 */
	public $sha1base36 = false;

	/**
	 * @since 1.17
	 * @var string
	 */
	public $archiveName = '';

	/**
	 * @since 1.12.2
	 */
	protected $filename;

	/**
	 * @since 1.12.2
	 * @var string|null
	 */
	protected $src = null;

	/**
	 * @since 1.18
	 * @var bool
	 * @todo Unused?
	 */
	public $isTemp = false;

	/**
	 * @since 1.18
	 * @deprecated 1.29 use Wikirevision::isTempSrc()
	 * First written to in 43d5d3b682cc1733ad01a837d11af4a402d57e6a
	 * Actually introduced in 52cd34acf590e5be946b7885ffdc13a157c1c6cf
	 */
	public $fileIsTemp;

	/** @var bool */
	private $mNoUpdates = false;

	/** @var Config $config */
	private $config;

	public function __construct( Config $config ) {
		$this->config = $config;
	}

	/**
	 * @since 1.7 taking a Title object (string before)
	 * @param Title $title
	 * @throws MWException
	 */
	public function setTitle( $title ) {
		if ( is_object( $title ) ) {
			$this->title = $title;
		} elseif ( is_null( $title ) ) {
			throw new MWException( "WikiRevision given a null title in import. "
				. "You may need to adjust \$wgLegalTitleChars." );
		} else {
			throw new MWException( "WikiRevision given non-object title in import." );
		}
	}

	/**
	 * @since 1.6.4
	 * @param int $id
	 */
	public function setID( $id ) {
		$this->id = $id;
	}

	/**
	 * @since 1.2
	 * @param string $ts
	 */
	public function setTimestamp( $ts ) {
		# 2003-08-05T18:30:02Z
		$this->timestamp = wfTimestamp( TS_MW, $ts );
	}

	/**
	 * @since 1.2
	 * @param string $user
	 */
	public function setUsername( $user ) {
		$this->user_text = $user;
	}

	/**
	 * @since 1.27
	 * @param User $user
	 */
	public function setUserObj( $user ) {
		$this->userObj = $user;
	}

	/**
	 * @since 1.2
	 * @param string $ip
	 */
	public function setUserIP( $ip ) {
		$this->user_text = $ip;
	}

	/**
	 * @since 1.21
	 * @param string $model
	 */
	public function setModel( $model ) {
		$this->model = $model;
	}

	/**
	 * @since 1.21
	 * @param string $format
	 */
	public function setFormat( $format ) {
		$this->format = $format;
	}

	/**
	 * @since 1.2
	 * @param string $text
	 */
	public function setText( $text ) {
		$this->text = $text;
	}

	/**
	 * @since 1.2.6
	 * @param string $text
	 */
	public function setComment( $text ) {
		$this->comment = $text;
	}

	/**
	 * @since 1.5.7
	 * @param bool $minor
	 */
	public function setMinor( $minor ) {
		$this->minor = (bool)$minor;
	}

	/**
	 * @since 1.12.2
	 * @param string|null $src
	 */
	public function setSrc( $src ) {
		$this->src = $src;
	}

	/**
	 * @since 1.17
	 * @param string $src
	 * @param bool $isTemp
	 */
	public function setFileSrc( $src, $isTemp ) {
		$this->fileSrc = $src;
		$this->fileIsTemp = $isTemp;
		$this->isTemp = $isTemp;
	}

	/**
	 * @since 1.17
	 * @param string $sha1base36
	 */
	public function setSha1Base36( $sha1base36 ) {
		$this->sha1base36 = $sha1base36;
	}

	/**
	 * @since 1.12.2
	 * @param string $filename
	 */
	public function setFilename( $filename ) {
		$this->filename = $filename;
	}

	/**
	 * @since 1.17
	 * @param string $archiveName
	 */
	public function setArchiveName( $archiveName ) {
		$this->archiveName = $archiveName;
	}

	/**
	 * @since 1.12.2
	 * @param int $size
	 */
	public function setSize( $size ) {
		$this->size = intval( $size );
	}

	/**
	 * @since 1.12.2
	 * @param string $type
	 */
	public function setType( $type ) {
		$this->type = $type;
	}

	/**
	 * @since 1.12.2
	 * @param string $action
	 */
	public function setAction( $action ) {
		$this->action = $action;
	}

	/**
	 * @since 1.12.2
	 * @param array $params
	 */
	public function setParams( $params ) {
		$this->params = $params;
	}

	/**
	 * @since 1.18
	 * @param bool $noupdates
	 */
	public function setNoUpdates( $noupdates ) {
		$this->mNoUpdates = $noupdates;
	}

	/**
	 * @since 1.2
	 * @return Title
	 */
	public function getTitle() {
		return $this->title;
	}

	/**
	 * @since 1.6.4
	 * @return int
	 */
	public function getID() {
		return $this->id;
	}

	/**
	 * @since 1.2
	 * @return string
	 */
	public function getTimestamp() {
		return $this->timestamp;
	}

	/**
	 * @since 1.2
	 * @return string
	 */
	public function getUser() {
		return $this->user_text;
	}

	/**
	 * @since 1.27
	 * @return User
	 */
	public function getUserObj() {
		return $this->userObj;
	}

	/**
	 * @since 1.2
	 * @return string
	 */
	public function getText() {
		return $this->text;
	}

	/**
	 * @since 1.24
	 * @return ContentHandler
	 */
	public function getContentHandler() {
		if ( is_null( $this->contentHandler ) ) {
			$this->contentHandler = ContentHandler::getForModelID( $this->getModel() );
		}

		return $this->contentHandler;
	}

	/**
	 * @since 1.21
	 * @return Content
	 */
	public function getContent() {
		if ( is_null( $this->content ) ) {
			$handler = $this->getContentHandler();
			$this->content = $handler->unserializeContent( $this->text, $this->getFormat() );
		}

		return $this->content;
	}

	/**
	 * @since 1.21
	 * @return string
	 */
	public function getModel() {
		if ( is_null( $this->model ) ) {
			$this->model = $this->getTitle()->getContentModel();
		}

		return $this->model;
	}

	/**
	 * @since 1.21
	 * @return string
	 */
	public function getFormat() {
		if ( is_null( $this->format ) ) {
			$this->format = $this->getContentHandler()->getDefaultFormat();
		}

		return $this->format;
	}

	/**
	 * @since 1.2.6
	 * @return string
	 */
	public function getComment() {
		return $this->comment;
	}

	/**
	 * @since 1.5.7
	 * @return bool
	 */
	public function getMinor() {
		return $this->minor;
	}

	/**
	 * @since 1.12.2
	 * @return string|null
	 */
	public function getSrc() {
		return $this->src;
	}

	/**
	 * @since 1.17
	 * @return bool|string
	 */
	public function getSha1() {
		if ( $this->sha1base36 ) {
			return Wikimedia\base_convert( $this->sha1base36, 36, 16 );
		}
		return false;
	}

	/**
	 * @since 1.31
	 * @return bool|string
	 */
	public function getSha1Base36() {
		if ( $this->sha1base36 ) {
			return $this->sha1base36;
		}
		return false;
	}

	/**
	 * @since 1.17
	 * @return string
	 */
	public function getFileSrc() {
		return $this->fileSrc;
	}

	/**
	 * @since 1.17
	 * @return bool
	 */
	public function isTempSrc() {
		return $this->isTemp;
	}

	/**
	 * @since 1.12.2
	 * @return mixed
	 */
	public function getFilename() {
		return $this->filename;
	}

	/**
	 * @since 1.17
	 * @return string
	 */
	public function getArchiveName() {
		return $this->archiveName;
	}

	/**
	 * @since 1.12.2
	 * @return mixed
	 */
	public function getSize() {
		return $this->size;
	}

	/**
	 * @since 1.12.2
	 * @return string
	 */
	public function getType() {
		return $this->type;
	}

	/**
	 * @since 1.12.2
	 * @return string
	 */
	public function getAction() {
		return $this->action;
	}

	/**
	 * @since 1.12.2
	 * @return string
	 */
	public function getParams() {
		return $this->params;
	}

	/**
	 * @since 1.4.1
	 * @deprecated in 1.31. Use OldRevisionImporter::import
	 * @return bool
	 */
	public function importOldRevision() {
		if ( $this->mNoUpdates ) {
			$importer = MediaWikiServices::getInstance()->getWikiRevisionOldRevisionImporterNoUpdates();
		} else {
			$importer = MediaWikiServices::getInstance()->getWikiRevisionOldRevisionImporter();
		}
		return $importer->import( $this );
	}

	/**
	 * @since 1.12.2
	 * @return bool
	 */
	public function importLogItem() {
		$dbw = wfGetDB( DB_MASTER );

		$user = $this->getUserObj() ?: User::newFromName( $this->getUser(), false );

		# @todo FIXME: This will not record autoblocks
		if ( !$this->getTitle() ) {
			wfDebug( __METHOD__ . ": skipping invalid {$this->type}/{$this->action} log time, timestamp " .
				$this->timestamp . "\n" );
			return false;
		}
		# Check if it exists already
		// @todo FIXME: Use original log ID (better for backups)
		$prior = $dbw->selectField( 'logging', '1',
			[ 'log_type' => $this->getType(),
				'log_action' => $this->getAction(),
				'log_timestamp' => $dbw->timestamp( $this->timestamp ),
				'log_namespace' => $this->getTitle()->getNamespace(),
				'log_title' => $this->getTitle()->getDBkey(),
				'log_params' => $this->params ],
			__METHOD__
		);
		// @todo FIXME: This could fail slightly for multiple matches :P
		if ( $prior ) {
			wfDebug( __METHOD__
				. ": skipping existing item for Log:{$this->type}/{$this->action}, timestamp "
				. $this->timestamp . "\n" );
			return false;
		}
		$data = [
			'log_type' => $this->type,
			'log_action' => $this->action,
			'log_timestamp' => $dbw->timestamp( $this->timestamp ),
			'log_namespace' => $this->getTitle()->getNamespace(),
			'log_title' => $this->getTitle()->getDBkey(),
			'log_params' => $this->params
		] + CommentStore::getStore()->insert( $dbw, 'log_comment', $this->getComment() )
			+ ActorMigration::newMigration()->getInsertValues( $dbw, 'log_user', $user );
		$dbw->insert( 'logging', $data, __METHOD__ );

		return true;
	}

	/**
	 * @since 1.12.2
	 * @deprecated in 1.31. Use UploadImporter::import
	 * @return bool
	 */
	public function importUpload() {
		$importer = MediaWikiServices::getInstance()->getWikiRevisionUploadImporter();
		$statusValue = $importer->import( $this );
		return $statusValue->isGood();
	}

	/**
	 * @since 1.12.2
	 * @deprecated in 1.31. Use UploadImporter::downloadSource
	 * @return bool|string
	 */
	public function downloadSource() {
		$importer = new ImportableUploadRevisionImporter(
			$this->config->get( 'EnableUploads' ),
			LoggerFactory::getInstance( 'UploadRevisionImporter' )
		);
		return $importer->downloadSource( $this );
	}

}