<?php
/**
 * HavingProcessor.php
 *
 * Parses the HAVING statements.
 *
 * PHP version 5
 *
 * LICENSE:
 * Copyright (c) 2010-2014 Justin Swanhart and André Rothe
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * @author    André Rothe <andre.rothe@phosco.info>
 * @copyright 2010-2014 Justin Swanhart and André Rothe
 * @license   http://www.debian.org/misc/bsd.license  BSD License (3 Clause)
 * @version   SVN: $Id$
 * 
 */

namespace PHPSQLParser\processors;
use PHPSQLParser\utils\ExpressionType;
use Analog\Analog;

/**
 * This class implements the processor for the HAVING statement. 
 * You can overwrite all functions to achieve another handling.
 *
 * @author  André Rothe <andre.rothe@phosco.info>
 * @license http://www.debian.org/misc/bsd.license  BSD License (3 Clause)
 *  
 */
class HavingProcessor extends ExpressionListProcessor {

	// helper function to find an example for issue 10 on GitHub.com
	protected function logError($sql) {
		Analog::log("The alias clause of a colref is empty, this should not occur.", Analog::ALERT);
		Analog::log("Please create an issue on GitHub or GoogleCode with your SQL statement.", Analog::ALERT);
		Analog::log(print_r($sql, true), Analog::ALERT);
	}
	
    public function process($tokens, $select = array()) {
        $parsed = parent::process($tokens);

        foreach ($parsed as $k => $v) {
            if ($v['expr_type'] === ExpressionType::COLREF) {
                foreach ($select as $clause) {
                    if (!isset($clause['alias'])) {
						$this->logError($select);
                    	continue;
                    }
                    if (!$clause['alias']) {
                        continue;
                    }
                    if ($clause['alias']['no_quotes'] === $v['no_quotes']) {
                        $parsed[$k]['expr_type'] = ExpressionType::ALIAS;
                        break;
                    }
                }
            }
        }

        return $parsed;
    }
}

?>
