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<?php
/**
 * Class to walk into a list of Title objects.
 *
 * Note: this entire file is a byte-for-byte copy of UserArrayFromResult.php
 * with s/User/Title/.  If anyone can figure out how to do this nicely
 * with inheritance or something, please do so.
 *
 * 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 Wikimedia\Rdbms\IResultWrapper;
/**
 * @newable
 * @note marked as newable in 1.35 for lack of a better alternative,
 *       but should probably become part of the TitleFactory service.
 */
class TitleArrayFromResult extends TitleArray implements Countable {
    /** @var IResultWrapper */
    public $res;
    public $key;
    public $current;
    /**
     * @stable to call
     *
     * @param IResultWrapper $res
     */
    public function __construct( $res ) {
        $this->res = $res;
        $this->key = 0;
        $this->setCurrent( $this->res->current() );
    }
    /**
     * @param bool|stdClass $row
     * @return void
     */
    protected function setCurrent( $row ) {
        if ( $row === false ) {
            $this->current = false;
        } else {
            $this->current = Title::newFromRow( $row );
        }
    }
    /**
     * @return int
     */
    public function count() {
        return $this->res->numRows();
    }
    public function current() {
        return $this->current;
    }
    public function key() {
        return $this->key;
    }
    public function next() {
        $row = $this->res->next();
        $this->setCurrent( $row );
        $this->key++;
    }
    public function rewind() {
        $this->res->rewind();
        $this->key = 0;
        $this->setCurrent( $this->res->current() );
    }
    /**
     * @return bool
     */
    public function valid() {
        return $this->current !== false;
    }
}