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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
 */

class EditWatchlistCheckboxSeriesField extends HTMLMultiSelectField {
	/**
	 * HTMLMultiSelectField throws validation errors if we get input data
	 * that doesn't match the data set in the form setup. This causes
	 * problems if something gets removed from the watchlist while the
	 * form is open (T34126), but we know that invalid items will
	 * be harmless so we can override it here.
	 *
	 * @param string $value The value the field was submitted with
	 * @param array $alldata The data collected from the form
	 * @return bool|string Bool true on success, or String error to display.
	 */
	function validate( $value, $alldata ) {
		// Need to call into grandparent to be a good citizen. :)
		return HTMLFormField::validate( $value, $alldata );
	}
}