/home/edulekha/studygroup.edulekha.com/ow_plugins/questions/bol/answer_dao.php
<?php
/**
* This software is intended for use with Oxwall Free Community Software http://www.oxwall.org/ and is
* licensed under The BSD license.
* ---
* Copyright (c) 2012, Sergey Kambalin
* All rights reserved.
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this list of conditions and
* the following disclaimer.
*
* - 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.
*
* - Neither the name of the Oxwall Foundation nor the names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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 Sergey Kambalin <greyexpert@gmail.com>
* @package questions.bol
*/
class QUESTIONS_BOL_AnswerDao extends OW_BaseDao
{
/**
* Singleton instance.
*
* @var QUESTIONS_BOL_AnswerDao
*/
private static $classInstance;
/**
* Returns an instance of class (singleton pattern implementation).
*
* @return QUESTIONS_BOL_AnswerDao
*/
public static function getInstance()
{
if ( self::$classInstance === null )
{
self::$classInstance = new self();
}
return self::$classInstance;
}
/**
* @see OW_BaseDao::getDtoClassName()
*
*/
public function getDtoClassName()
{
return 'QUESTIONS_BOL_Answer';
}
/**
* @see OW_BaseDao::getTableName()
*
*/
public function getTableName()
{
return OW_DB_PREFIX . 'questions_answer';
}
/**
*
* @return QUESTIONS_BOL_Answer
*/
public function findAnswer( $userId, $optionId )
{
$example = new OW_Example();
$example->andFieldEqual('optionId', $optionId);
$example->andFieldEqual('userId', $userId);
return $this->findObjectByExample($example);
}
public function findByQuestionIdAndUserId( $questionId, $userId )
{
$optionDao = QUESTIONS_BOL_OptionDao::getInstance();
$query ='SELECT a.* FROM ' . $this->getTableName() . ' a ' .
'INNER JOIN ' . $optionDao->getTableName() . ' o ON a.optionId=o.id ' .
'WHERE o.questionId=:q AND a.userId=:u';
return $this->dbo->queryForColumn($query, array(
'q' => $questionId,
'u' => $userId
));
}
public function findListWithUserIdList( $optionId, $userIds, $limit = null )
{
if (empty($userIds))
{
return array();
}
$example = new OW_Example();
$example->andFieldEqual('optionId', $optionId);
$example->andFieldInArray('userId', $userIds);
if ( !empty($limit) )
{
$example->setLimitClause(0, $limit);
}
$example->setOrder('timeStamp DESC');
return $this->findListByExample($example);
}
public function findList( $optionId, $limit = null )
{
$example = new OW_Example();
$example->andFieldEqual('optionId', $optionId);
if ( !empty($limit) )
{
$example->setLimitClause(0, $limit);
}
$example->setOrder('timeStamp DESC');
return $this->findListByExample($example);
}
public function findByOptionId( $optionId )
{
$example = new OW_Example();
$example->andFieldEqual('optionId', $optionId);
return $this->findListByExample($example);
}
public function findTotalCountByQuestionId( $questionId )
{
$optionDao = QUESTIONS_BOL_OptionDao::getInstance();
$query ='SELECT COUNT(a.id) FROM ' . $this->getTableName() . ' a ' .
'INNER JOIN ' . $optionDao->getTableName() . ' o ON a.optionId=o.id ' .
'WHERE o.questionId=:q';
return $this->dbo->queryForColumn($query, array(
'q' => $questionId
));
}
public function findMaxCountByQuestionId( $questionId )
{
$optionDao = QUESTIONS_BOL_OptionDao::getInstance();
$query ='SELECT count(a.id) FROM ' . $this->getTableName() . ' a ' .
'INNER JOIN ' . $optionDao->getTableName() . ' o ON a.optionId=o.id ' .
'WHERE o.questionId=:q GROUP BY o.id ORDER BY count(a.id) DESC limit 1';
return (int) $this->dbo->queryForColumn($query, array(
'q' => $questionId
));
}
public function findCountList( $optionIds )
{
if ( empty($optionIds) )
{
return array();
}
$query ='SELECT optionId, count(id) count FROM ' . $this->getTableName() .
' WHERE optionId IN (' . implode(', ', $optionIds) . ') GROUP BY optionId';
$list = $this->dbo->queryForList($query);
$out = array();
foreach ( $list as $row )
{
$out[$row['optionId']] = $row['count'];
}
foreach ($optionIds as $oid)
{
$out[$oid] = empty($out[$oid]) ? 0 : $out[$oid];
}
return $out;
}
public function findCount( $optionId )
{
$example = new OW_Example();
$example->andFieldEqual('optionId', $optionId);
return $this->countByExample($example);
}
public function findUserAnswerList( $userId, $optionIds )
{
$example = new OW_Example();
$example->andFieldInArray('optionId', $optionIds);
$example->andFieldEqual('userId', $userId);
return $this->findListByExample($example);
}
public function findByUserId( $userId )
{
$example = new OW_Example();
$example->andFieldEqual("userId", $userId);
return $this->findListByExample($example);
}
}