IdentityCollation.php
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IdentityCollation.php
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	<?php
	/**
	* 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
	*/

	use MediaWiki\Language\Language;

	/**
	* Collation class that's essentially a no-op.
	*
	* Does sorting based on binary value of the string.
	* Like how things were pre 1.17.
	*
	* @since 1.18
	*/
	class IdentityCollation extends Collation {

	/** @var Language */
	private $contentLanguage;

	/**
	* @param Language $contentLanguage
	*/
	public function __construct( Language $contentLanguage ) {
	$this->contentLanguage = $contentLanguage;
	}

	public function getSortKey( $string ) {
	return $string;
	}

	public function getFirstLetter( $string ) {
	// Copied from UppercaseCollation.
	// I'm kind of unclear on when this could happen...
	if ( $string[0] == "\0" ) {
	$string = substr( $string, 1 );
	}
	return $this->contentLanguage->firstChar( $string );
	}
	}