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diff --git a/www/wiki/includes/content/MessageContent.php b/www/wiki/includes/content/MessageContent.php
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+<?php
+/**
+ * Wrapper content object allowing to handle a system message as a Content object.
+ *
+ * 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
+ *
+ * @since 1.21
+ *
+ * @file
+ * @ingroup Content
+ *
+ * @author Daniel Kinzler
+ */
+
+/**
+ * Wrapper allowing us to handle a system message as a Content object.
+ * Note that this is generally *not* used to represent content from the
+ * MediaWiki namespace, and that there is no MessageContentHandler.
+ * MessageContent is just intended as glue for wrapping a message programmatically.
+ *
+ * @ingroup Content
+ */
+class MessageContent extends AbstractContent {
+
+	/**
+	 * @var Message
+	 */
+	protected $mMessage;
+
+	/**
+	 * @param Message|string $msg A Message object, or a message key.
+	 * @param string[] $params An optional array of message parameters.
+	 */
+	public function __construct( $msg, $params = null ) {
+		# XXX: messages may be wikitext, html or plain text! and maybe even something else entirely.
+		parent::__construct( CONTENT_MODEL_WIKITEXT );
+
+		if ( is_string( $msg ) ) {
+			$this->mMessage = wfMessage( $msg );
+		} else {
+			$this->mMessage = clone $msg;
+		}
+
+		if ( $params ) {
+			$this->mMessage = $this->mMessage->params( $params );
+		}
+	}
+
+	/**
+	 * Fully parse the text from wikitext to HTML.
+	 *
+	 * @return string Parsed HTML.
+	 */
+	public function getHtml() {
+		return $this->mMessage->parse();
+	}
+
+	/**
+	 * Returns the message text. {{-transformation is done.
+	 *
+	 * @return string Unescaped message text.
+	 */
+	public function getWikitext() {
+		return $this->mMessage->text();
+	}
+
+	/**
+	 * Returns the message object, with any parameters already substituted.
+	 *
+	 * @return Message The message object.
+	 */
+	public function getNativeData() {
+		// NOTE: Message objects are mutable. Cloning here makes MessageContent immutable.
+		return clone $this->mMessage;
+	}
+
+	/**
+	 * @return string
+	 *
+	 * @see Content::getTextForSearchIndex
+	 */
+	public function getTextForSearchIndex() {
+		return $this->mMessage->plain();
+	}
+
+	/**
+	 * @return string
+	 *
+	 * @see Content::getWikitextForTransclusion
+	 */
+	public function getWikitextForTransclusion() {
+		return $this->getWikitext();
+	}
+
+	/**
+	 * @param int $maxlength Maximum length of the summary text, defaults to 250.
+	 *
+	 * @return string The summary text.
+	 *
+	 * @see Content::getTextForSummary
+	 */
+	public function getTextForSummary( $maxlength = 250 ) {
+		return substr( $this->mMessage->plain(), 0, $maxlength );
+	}
+
+	/**
+	 * @return int
+	 *
+	 * @see Content::getSize
+	 */
+	public function getSize() {
+		return strlen( $this->mMessage->plain() );
+	}
+
+	/**
+	 * @return Content A copy of this object
+	 *
+	 * @see Content::copy
+	 */
+	public function copy() {
+		// MessageContent is immutable (because getNativeData() returns a clone of the Message object)
+		return $this;
+	}
+
+	/**
+	 * @param bool|null $hasLinks
+	 *
+	 * @return bool Always false.
+	 *
+	 * @see Content::isCountable
+	 */
+	public function isCountable( $hasLinks = null ) {
+		return false;
+	}
+
+	/**
+	 * @param Title $title Unused.
+	 * @param int $revId Unused.
+	 * @param ParserOptions $options Unused.
+	 * @param bool $generateHtml Whether to generate HTML (default: true).
+	 *
+	 * @return ParserOutput
+	 *
+	 * @see Content::getParserOutput
+	 */
+	public function getParserOutput( Title $title, $revId = null,
+		ParserOptions $options = null, $generateHtml = true ) {
+		if ( $generateHtml ) {
+			$html = $this->getHtml();
+		} else {
+			$html = '';
+		}
+
+		$po = new ParserOutput( $html );
+		// Message objects are in the user language.
+		$po->recordOption( 'userlang' );
+
+		return $po;
+	}
+
+}