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Current File : //www/varak.net/wiki.varak.net/includes/filerepo/file/ForeignDBFile.php

<?php
/**
 * Foreign file with an accessible MediaWiki database.
 *
 * 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 FileAbstraction
 */

use MediaWiki\MediaWikiServices;
use Wikimedia\Rdbms\DBUnexpectedError;

/**
 * Foreign file with an accessible MediaWiki database
 *
 * @ingroup FileAbstraction
 */
class ForeignDBFile extends LocalFile {
	/**
	 * @param Title $title
	 * @param FileRepo $repo
	 * @param null $unused
	 * @return ForeignDBFile
	 */
	static function newFromTitle( $title, $repo, $unused = null ) {
		return new self( $title, $repo );
	}

	/**
	 * Create a ForeignDBFile from a title
	 * Do not call this except from inside a repo class.
	 *
	 * @param stdClass $row
	 * @param FileRepo $repo
	 * @return ForeignDBFile
	 */
	static function newFromRow( $row, $repo ) {
		$title = Title::makeTitle( NS_FILE, $row->img_name );
		$file = new self( $title, $repo );
		$file->loadFromRow( $row );

		return $file;
	}

	/**
	 * @param string $srcPath
	 * @param int $flags
	 * @param array $options
	 * @return Status
	 * @throws MWException
	 */
	function publish( $srcPath, $flags = 0, array $options = [] ) {
		$this->readOnlyError();
	}

	/**
	 * @param string $oldver
	 * @param string $desc
	 * @param string $license
	 * @param string $copyStatus
	 * @param string $source
	 * @param bool $watch
	 * @param bool|string $timestamp
	 * @param User|null $user User object or null to use $wgUser
	 * @return bool
	 * @throws MWException
	 */
	function recordUpload( $oldver, $desc, $license = '', $copyStatus = '', $source = '',
		$watch = false, $timestamp = false, User $user = null ) {
		$this->readOnlyError();
	}

	/**
	 * @param array $versions
	 * @param bool $unsuppress
	 * @return Status
	 * @throws MWException
	 */
	function restore( $versions = [], $unsuppress = false ) {
		$this->readOnlyError();
	}

	/**
	 * @param string $reason
	 * @param bool $suppress
	 * @param User|null $user
	 * @return Status
	 * @throws MWException
	 */
	function delete( $reason, $suppress = false, $user = null ) {
		$this->readOnlyError();
	}

	/**
	 * @param Title $target
	 * @return Status
	 * @throws MWException
	 */
	function move( $target ) {
		$this->readOnlyError();
	}

	/**
	 * @return string
	 */
	function getDescriptionUrl() {
		// Restore remote behavior
		return File::getDescriptionUrl();
	}

	/**
	 * @param Language|null $lang Optional language to fetch description in.
	 * @return string|false
	 */
	function getDescriptionText( Language $lang = null ) {
		global $wgLang;

		if ( !$this->repo->fetchDescription ) {
			return false;
		}

		$lang = $lang ?? $wgLang;
		$renderUrl = $this->repo->getDescriptionRenderUrl( $this->getName(), $lang->getCode() );
		if ( !$renderUrl ) {
			return false;
		}

		$touched = $this->repo->getReplicaDB()->selectField(
			'page',
			'page_touched',
			[
				'page_namespace' => NS_FILE,
				'page_title' => $this->title->getDBkey()
			]
		);
		if ( $touched === false ) {
			return false; // no description page
		}

		$cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
		$fname = __METHOD__;

		return $cache->getWithSetCallback(
			$this->repo->getLocalCacheKey(
				'ForeignFileDescription',
				$lang->getCode(),
				md5( $this->getName() ),
				$touched
			),
			$this->repo->descriptionCacheExpiry ?: $cache::TTL_UNCACHEABLE,
			function ( $oldValue, &$ttl, array &$setOpts ) use ( $renderUrl, $fname ) {
				wfDebug( "Fetching shared description from $renderUrl\n" );
				$res = Http::get( $renderUrl, [], $fname );
				if ( !$res ) {
					$ttl = WANObjectCache::TTL_UNCACHEABLE;
				}

				return $res;
			}
		);
	}

	/**
	 * Get short description URL for a file based on the page ID.
	 *
	 * @return string
	 * @throws DBUnexpectedError
	 * @since 1.27
	 */
	public function getDescriptionShortUrl() {
		$dbr = $this->repo->getReplicaDB();
		$pageId = $dbr->selectField(
			'page',
			'page_id',
			[
				'page_namespace' => NS_FILE,
				'page_title' => $this->title->getDBkey()
			]
		);

		if ( $pageId !== false ) {
			$url = $this->repo->makeUrl( [ 'curid' => $pageId ] );
			if ( $url !== false ) {
				return $url;
			}
		}
		return null;
	}

}

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