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diff --git a/www/wiki/includes/gallery/ImageGalleryBase.php b/www/wiki/includes/gallery/ImageGalleryBase.php
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+<?php
+/**
+ * Image gallery.
+ *
+ * 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
+ */
+
+/**
+ * Image gallery
+ *
+ * Add images to the gallery using add(), then render that list to HTML using toHTML().
+ *
+ * @ingroup Media
+ */
+abstract class ImageGalleryBase extends ContextSource {
+	/**
+	 * @var array Gallery images
+	 */
+	protected $mImages;
+
+	/**
+	 * @var bool Whether to show the filesize in bytes in categories
+	 */
+	protected $mShowBytes;
+
+	/**
+	 * @var bool Whether to show the dimensions in categories
+	 */
+	protected $mShowDimensions;
+
+	/**
+	 * @var bool Whether to show the filename. Default: true
+	 */
+	protected $mShowFilename;
+
+	/**
+	 * @var string Gallery mode. Default: traditional
+	 */
+	protected $mMode;
+
+	/**
+	 * @var bool|string Gallery caption. Default: false
+	 */
+	protected $mCaption = false;
+
+	/**
+	 * Length to truncate filename to in caption when using "showfilename".
+	 * A value of 'true' will truncate the filename to one line using CSS
+	 * and will be the behaviour after deprecation.
+	 *
+	 * @var bool|int
+	 */
+	protected $mCaptionLength = true;
+
+	/**
+	 * @var bool Hide blacklisted images?
+	 */
+	protected $mHideBadImages;
+
+	/**
+	 * @var Parser Registered parser object for output callbacks
+	 */
+	public $mParser;
+
+	/**
+	 * @var Title Contextual title, used when images are being screened against
+	 *   the bad image list
+	 */
+	protected $contextTitle = false;
+
+	/** @var array */
+	protected $mAttribs = [];
+
+	/** @var bool */
+	static private $modeMapping = false;
+
+	/**
+	 * Get a new image gallery. This is the method other callers
+	 * should use to get a gallery.
+	 *
+	 * @param string|bool $mode Mode to use. False to use the default
+	 * @param IContextSource|null $context
+	 * @return ImageGalleryBase
+	 * @throws MWException
+	 */
+	static function factory( $mode = false, IContextSource $context = null ) {
+		global $wgContLang;
+		self::loadModes();
+		if ( !$context ) {
+			$context = RequestContext::getMainAndWarn( __METHOD__ );
+		}
+		if ( !$mode ) {
+			$galleryOptions = $context->getConfig()->get( 'GalleryOptions' );
+			$mode = $galleryOptions['mode'];
+		}
+
+		$mode = $wgContLang->lc( $mode );
+
+		if ( isset( self::$modeMapping[$mode] ) ) {
+			$class = self::$modeMapping[$mode];
+			return new $class( $mode, $context );
+		} else {
+			throw new MWException( "No gallery class registered for mode $mode" );
+		}
+	}
+
+	private static function loadModes() {
+		if ( self::$modeMapping === false ) {
+			self::$modeMapping = [
+				'traditional' => TraditionalImageGallery::class,
+				'nolines' => NolinesImageGallery::class,
+				'packed' => PackedImageGallery::class,
+				'packed-hover' => PackedHoverImageGallery::class,
+				'packed-overlay' => PackedOverlayImageGallery::class,
+				'slideshow' => SlideshowImageGallery::class,
+			];
+			// Allow extensions to make a new gallery format.
+			Hooks::run( 'GalleryGetModes', [ &self::$modeMapping ] );
+		}
+	}
+
+	/**
+	 * Create a new image gallery object.
+	 *
+	 * You should not call this directly, but instead use
+	 * ImageGalleryBase::factory().
+	 * @param string $mode
+	 * @param IContextSource|null $context
+	 */
+	function __construct( $mode = 'traditional', IContextSource $context = null ) {
+		if ( $context ) {
+			$this->setContext( $context );
+		}
+
+		$galleryOptions = $this->getConfig()->get( 'GalleryOptions' );
+		$this->mImages = [];
+		$this->mShowBytes = $galleryOptions['showBytes'];
+		$this->mShowDimensions = $galleryOptions['showDimensions'];
+		$this->mShowFilename = true;
+		$this->mParser = false;
+		$this->mHideBadImages = false;
+		$this->mPerRow = $galleryOptions['imagesPerRow'];
+		$this->mWidths = $galleryOptions['imageWidth'];
+		$this->mHeights = $galleryOptions['imageHeight'];
+		$this->mCaptionLength = $galleryOptions['captionLength'];
+		$this->mMode = $mode;
+	}
+
+	/**
+	 * Register a parser object. If you do not set this
+	 * and the output of this gallery ends up in parser
+	 * cache, the javascript will break!
+	 *
+	 * @note This also triggers using the page's target
+	 *  language instead of the user language.
+	 *
+	 * @param Parser $parser
+	 */
+	function setParser( $parser ) {
+		$this->mParser = $parser;
+	}
+
+	/**
+	 * Set bad image flag
+	 * @param bool $flag
+	 */
+	function setHideBadImages( $flag = true ) {
+		$this->mHideBadImages = $flag;
+	}
+
+	/**
+	 * Set the caption (as plain text)
+	 *
+	 * @param string $caption
+	 */
+	function setCaption( $caption ) {
+		$this->mCaption = htmlspecialchars( $caption );
+	}
+
+	/**
+	 * Set the caption (as HTML)
+	 *
+	 * @param string $caption
+	 */
+	public function setCaptionHtml( $caption ) {
+		$this->mCaption = $caption;
+	}
+
+	/**
+	 * Set how many images will be displayed per row.
+	 *
+	 * @param int $num Integer >= 0; If perrow=0 the gallery layout will adapt
+	 *   to screensize invalid numbers will be rejected
+	 */
+	public function setPerRow( $num ) {
+		if ( $num >= 0 ) {
+			$this->mPerRow = (int)$num;
+		}
+	}
+
+	/**
+	 * Set how wide each image will be, in pixels.
+	 *
+	 * @param string $num Number. Unit other than 'px is invalid. Invalid numbers
+	 *   and those below 0 are ignored.
+	 */
+	public function setWidths( $num ) {
+		$parsed = Parser::parseWidthParam( $num, false );
+		if ( isset( $parsed['width'] ) && $parsed['width'] > 0 ) {
+			$this->mWidths = $parsed['width'];
+		}
+	}
+
+	/**
+	 * Set how high each image will be, in pixels.
+	 *
+	 * @param string $num Number. Unit other than 'px is invalid. Invalid numbers
+	 *   and those below 0 are ignored.
+	 */
+	public function setHeights( $num ) {
+		$parsed = Parser::parseWidthParam( $num, false );
+		if ( isset( $parsed['width'] ) && $parsed['width'] > 0 ) {
+			$this->mHeights = $parsed['width'];
+		}
+	}
+
+	/**
+	 * Allow setting additional options. This is meant
+	 * to allow extensions to add additional parameters to
+	 * <gallery> parser tag.
+	 *
+	 * @param array $options Attributes of gallery tag
+	 */
+	public function setAdditionalOptions( $options ) {
+	}
+
+	/**
+	 * Add an image to the gallery.
+	 *
+	 * @param Title $title Title object of the image that is added to the gallery
+	 * @param string $html Additional HTML text to be shown. The name and size
+	 *   of the image are always shown.
+	 * @param string $alt Alt text for the image
+	 * @param string $link Override image link (optional)
+	 * @param array $handlerOpts Array of options for image handler (aka page number)
+	 */
+	function add( $title, $html = '', $alt = '', $link = '', $handlerOpts = [] ) {
+		if ( $title instanceof File ) {
+			// Old calling convention
+			$title = $title->getTitle();
+		}
+		$this->mImages[] = [ $title, $html, $alt, $link, $handlerOpts ];
+		wfDebug( 'ImageGallery::add ' . $title->getText() . "\n" );
+	}
+
+	/**
+	 * Add an image at the beginning of the gallery.
+	 *
+	 * @param Title $title Title object of the image that is added to the gallery
+	 * @param string $html Additional HTML text to be shown. The name and size
+	 *   of the image are always shown.
+	 * @param string $alt Alt text for the image
+	 * @param string $link Override image link (optional)
+	 * @param array $handlerOpts Array of options for image handler (aka page number)
+	 */
+	function insert( $title, $html = '', $alt = '', $link = '', $handlerOpts = [] ) {
+		if ( $title instanceof File ) {
+			// Old calling convention
+			$title = $title->getTitle();
+		}
+		array_unshift( $this->mImages, [ &$title, $html, $alt, $link, $handlerOpts ] );
+	}
+
+	/**
+	 * Returns the list of images this gallery contains
+	 * @return array
+	 */
+	public function getImages() {
+		return $this->mImages;
+	}
+
+	/**
+	 * isEmpty() returns true if the gallery contains no images
+	 * @return bool
+	 */
+	function isEmpty() {
+		return empty( $this->mImages );
+	}
+
+	/**
+	 * Enable/Disable showing of the dimensions of an image in the gallery.
+	 * Enabled by default.
+	 *
+	 * @param bool $f Set to false to disable
+	 */
+	function setShowDimensions( $f ) {
+		$this->mShowDimensions = (bool)$f;
+	}
+
+	/**
+	 * Enable/Disable showing of the file size of an image in the gallery.
+	 * Enabled by default.
+	 *
+	 * @param bool $f Set to false to disable
+	 */
+	function setShowBytes( $f ) {
+		$this->mShowBytes = (bool)$f;
+	}
+
+	/**
+	 * Enable/Disable showing of the filename of an image in the gallery.
+	 * Enabled by default.
+	 *
+	 * @param bool $f Set to false to disable
+	 */
+	function setShowFilename( $f ) {
+		$this->mShowFilename = (bool)$f;
+	}
+
+	/**
+	 * Set arbitrary attributes to go on the HTML gallery output element.
+	 * Should be suitable for a <ul> element.
+	 *
+	 * Note -- if taking from user input, you should probably run through
+	 * Sanitizer::validateAttributes() first.
+	 *
+	 * @param array $attribs Array of HTML attribute pairs
+	 */
+	function setAttributes( $attribs ) {
+		$this->mAttribs = $attribs;
+	}
+
+	/**
+	 * Display an html representation of the gallery
+	 *
+	 * @return string The html
+	 */
+	abstract public function toHTML();
+
+	/**
+	 * @return int Number of images in the gallery
+	 */
+	public function count() {
+		return count( $this->mImages );
+	}
+
+	/**
+	 * Set the contextual title
+	 *
+	 * @param Title $title Contextual title
+	 */
+	public function setContextTitle( $title ) {
+		$this->contextTitle = $title;
+	}
+
+	/**
+	 * Get the contextual title, if applicable
+	 *
+	 * @return Title|bool Title or false
+	 */
+	public function getContextTitle() {
+		return is_object( $this->contextTitle ) && $this->contextTitle instanceof Title
+			? $this->contextTitle
+			: false;
+	}
+
+	/**
+	 * Determines the correct language to be used for this image gallery
+	 * @return Language
+	 */
+	protected function getRenderLang() {
+		return $this->mParser
+			? $this->mParser->getTargetLanguage()
+			: $this->getLanguage();
+	}
+}