<?php
/*
 *  $Id: Self.php 5798 2009-06-02 15:10:46Z piccoloprincipe $
 *
 * 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
 * OWNER 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.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the LGPL. For more information, see
 * <http://www.phpdoctrine.org>.
 */

/**
 * Doctrine_Relation_Association_Self
 *
 * @package     Doctrine
 * @subpackage  Relation
 * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link        www.phpdoctrine.org
 * @since       1.0
 * @version     $Revision: 5798 $
 * @author      Konsta Vesterinen <kvesteri@cc.hut.fi>
 */
class Doctrine_Relation_Association_Self extends Doctrine_Relation_Association
{
    /**
     * getRelationDql
     *
     * @param integer $count
     * @return string
     */
    public function getRelationDql($count, $context = 'record')
    {
        switch ($context) {
            case 'record':
                $identifierColumnNames = $this->definition['table']->getIdentifierColumnNames();
                $identifier = array_pop($identifierColumnNames);
                $sub    = 'SELECT '.$this->definition['foreign'] 
                        . ' FROM '.$this->definition['refTable']->getTableName()
                        . ' WHERE '.$this->definition['local']
                        . ' = ?';

                $sub2   = 'SELECT '.$this->definition['local']
                        . ' FROM '.$this->definition['refTable']->getTableName()
                        . ' WHERE '.$this->definition['foreign']
                        . ' = ?';

                $dql  = 'FROM ' . $this->definition['table']->getComponentName()
                      . '.' . $this->definition['refTable']->getComponentName()
                      . ' WHERE ' . $this->definition['table']->getComponentName()
                      . '.' . $identifier 
                      . ' IN (' . $sub . ')'
                      . ' || ' . $this->definition['table']->getComponentName() 
                      . '.' . $identifier
                      . ' IN (' . $sub2 . ')';
                break;
            case 'collection':
                $sub  = substr(str_repeat('?, ', $count),0,-2);
                $dql  = 'FROM '.$this->definition['refTable']->getComponentName()
                      . '.' . $this->definition['table']->getComponentName()
                      . ' WHERE '.$this->definition['refTable']->getComponentName()
                      . '.' . $this->definition['local'] . ' IN (' . $sub . ')';
        };

        return $dql;
    }

    public function fetchRelatedFor(Doctrine_Record $record)
    {
        $id      = $record->getIncremented();

        $q = new Doctrine_RawSql();

        $assocTable = $this->getAssociationFactory()->getTableName();
        $tableName  = $record->getTable()->getTableName();
        $identifierColumnNames = $record->getTable()->getIdentifierColumnNames();
        $identifier = array_pop($identifierColumnNames);

        $sub     = 'SELECT '.$this->getForeign().
                   ' FROM '.$assocTable.
                   ' WHERE '.$this->getLocal().
                   ' = ?';

        $sub2   = 'SELECT '.$this->getLocal().
                  ' FROM '.$assocTable.
                  ' WHERE '.$this->getForeign().
                  ' = ?';

        $q->select('{'.$tableName.'.*}, {'.$assocTable.'.*}')
          ->from($tableName . ' INNER JOIN '.$assocTable.' ON '.
                 $tableName . '.' . $identifier . ' = ' . $assocTable . '.' . $this->getLocal() . ' OR ' .
                 $tableName . '.' . $identifier . ' = ' . $assocTable . '.' . $this->getForeign()
                 )
          ->where($tableName.'.'.$identifier.' IN ('.$sub.') OR '.
                  $tableName.'.'.$identifier.' IN ('.$sub2.')'
                );
        $q->addComponent($tableName,  $record->getTable()->getComponentName());
        $q->addComponent($assocTable, $record->getTable()->getComponentName(). '.' . $this->getAssociationFactory()->getComponentName());

        return $q->execute(array($id, $id));
    }
}