<?php

/*

 * 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.doctrine-project.org>.

 */

namespace Doctrine\DBAL\Schema;

/**

 * xxx

 *

 * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL

 * @author      Konsta Vesterinen <kvesteri@cc.hut.fi>

 * @author      Lukas Smith <smith@pooteeweet.org> (PEAR MDB2 library)

 * @author      Benjamin Eberlei <kontakt@beberlei.de>

 * @version     $Revision$

 * @since       2.0

 */

class PostgreSqlSchemaManager extends AbstractSchemaManager

{

    protected function _getPortableTableForeignKeyDefinition($tableForeignKey)

    {

        $onUpdate = null;

        $onDelete = null;

        if (preg_match('(ON UPDATE ([a-zA-Z0-9]+))', $tableForeignKey['condef'], $match)) {

            $onUpdate = $match[1];

        }

        if (preg_match('(ON DELETE ([a-zA-Z0-9]+))', $tableForeignKey['condef'], $match)) {

            $onDelete = $match[1];

        }

        if (preg_match('/FOREIGN KEY \((.+)\) REFERENCES (.+)\((.+)\)/', $tableForeignKey['condef'], $values)) {

            // PostgreSQL returns identifiers that are keywords with quotes, we need them later, don't get

            // the idea to trim them here.

            $localColumns = array_map('trim', explode(",", $values[1]));

            $foreignColumns = array_map('trim', explode(",", $values[3]));

            $foreignTable = $values[2];

        }

        return new ForeignKeyConstraint(

                $localColumns, $foreignTable, $foreignColumns, $tableForeignKey['conname'],

                array('onUpdate' => $onUpdate, 'onDelete' => $onDelete)

        );

    }

    public function dropDatabase($database)

    {

        $params = $this->_conn->getParams();

        $params["dbname"] = "postgres";

        $tmpPlatform = $this->_platform;

        $tmpConn = $this->_conn;

        $this->_conn = \Doctrine\DBAL\DriverManager::getConnection($params);

        $this->_platform = $this->_conn->getDatabasePlatform();

        parent::dropDatabase($database);

        $this->_platform = $tmpPlatform;

        $this->_conn = $tmpConn;

    }

    public function createDatabase($database)

    {

        $params = $this->_conn->getParams();

        $params["dbname"] = "postgres";

        $tmpPlatform = $this->_platform;

        $tmpConn = $this->_conn;

        $this->_conn = \Doctrine\DBAL\DriverManager::getConnection($params);

        $this->_platform = $this->_conn->getDatabasePlatform();

        parent::createDatabase($database);

        $this->_platform = $tmpPlatform;

        $this->_conn = $tmpConn;

    }

    protected function _getPortableTriggerDefinition($trigger)

    {

        return $trigger['trigger_name'];

    }

    protected function _getPortableViewDefinition($view)

    {

        return new View($view['viewname'], $view['definition']);

    }

    protected function _getPortableUserDefinition($user)

    {

        return array(

            'user' => $user['usename'],

            'password' => $user['passwd']

        );

    }

    protected function _getPortableTableDefinition($table)

    {

        if ($table['schema_name'] == 'public') {

            return $table['table_name'];

        } else {

            return $table['schema_name'] . "." . $table['table_name'];

        }

    }

    /**

     * @license New BSD License

     * @link http://ezcomponents.org/docs/api/trunk/DatabaseSchema/ezcDbSchemaPgsqlReader.html

     * @param  array $tableIndexes

     * @param  string $tableName

     * @return array

     */

    protected function _getPortableTableIndexesList($tableIndexes, $tableName=null)

    {

        $buffer = array();

        foreach ($tableIndexes AS $row) {

            $colNumbers = explode(' ', $row['indkey']);

            $colNumbersSql = 'IN (' . join(' ,', $colNumbers) . ' )';

            $columnNameSql = "SELECT attnum, attname FROM pg_attribute

                WHERE attrelid={$row['indrelid']} AND attnum $colNumbersSql ORDER BY attnum ASC;";

            $stmt = $this->_conn->executeQuery($columnNameSql);

            $indexColumns = $stmt->fetchAll();

            // required for getting the order of the columns right.

            foreach ($colNumbers AS $colNum) {

                foreach ($indexColumns as $colRow) {

                    if ($colNum == $colRow['attnum']) {

                        $buffer[] = array(

                            'key_name' => $row['relname'],

                            'column_name' => trim($colRow['attname']),

                            'non_unique' => !$row['indisunique'],

                            'primary' => $row['indisprimary']

                        );

                    }

                }

            }

        }

        return parent::_getPortableTableIndexesList($buffer);

    }

    protected function _getPortableDatabaseDefinition($database)

    {

        return $database['datname'];

    }

    protected function _getPortableSequenceDefinition($sequence)

    {

        if ($sequence['schemaname'] != 'public') {

            $sequenceName = $sequence['schemaname'] . "." . $sequence['relname'];

        } else {

            $sequenceName = $sequence['relname'];

        }

        $data = $this->_conn->fetchAll('SELECT min_value, increment_by FROM ' . $sequenceName);

        return new Sequence($sequenceName, $data[0]['increment_by'], $data[0]['min_value']);

    }

    protected function _getPortableTableColumnDefinition($tableColumn)

    {

        $tableColumn = array_change_key_case($tableColumn, CASE_LOWER);

        if (strtolower($tableColumn['type']) === 'varchar') {

            // get length from varchar definition

            $length = preg_replace('~.*\(([0-9]*)\).*~', '$1', $tableColumn['complete_type']);

            $tableColumn['length'] = $length;

        }

        $matches = array();

        $autoincrement = false;

        if (preg_match("/^nextval\('(.*)'(::.*)?\)$/", $tableColumn['default'], $matches)) {

            $tableColumn['sequence'] = $matches[1];

            $tableColumn['default'] = null;

            $autoincrement = true;

        }

        if (stripos($tableColumn['default'], 'NULL') === 0) {

            $tableColumn['default'] = null;

        }

        $length = (isset($tableColumn['length'])) ? $tableColumn['length'] : null;

        if ($length == '-1' && isset($tableColumn['atttypmod'])) {

            $length = $tableColumn['atttypmod'] - 4;

        }

        if ((int) $length <= 0) {

            $length = null;

        }

        $fixed = null;

        if (!isset($tableColumn['name'])) {

            $tableColumn['name'] = '';

        }

        $precision = null;

        $scale = null;

        if ($this->_platform->hasDoctrineTypeMappingFor($tableColumn['type'])) {

            $dbType = strtolower($tableColumn['type']);

        } else {

            $dbType = strtolower($tableColumn['domain_type']);

            $tableColumn['complete_type'] = $tableColumn['domain_complete_type'];

        }

        $type = $this->_platform->getDoctrineTypeMapping($dbType);

        $type = $this->extractDoctrineTypeFromComment($tableColumn['comment'], $type);

        $tableColumn['comment'] = $this->removeDoctrineTypeFromComment($tableColumn['comment'], $type);

        switch ($dbType) {

            case 'smallint':

            case 'int2':

                $length = null;

                break;

            case 'int':

            case 'int4':

            case 'integer':

                $length = null;

                break;

            case 'bigint':

            case 'int8':

                $length = null;

                break;

            case 'bool':

            case 'boolean':

                $length = null;

                break;

            case 'text':

                $fixed = false;

                break;

            case 'varchar':

            case 'interval':

            case '_varchar':

                $fixed = false;

                break;

            case 'char':

            case 'bpchar':

                $fixed = true;

                break;

            case 'float':

            case 'float4':

            case 'float8':

            case 'double':

            case 'double precision':

            case 'real':

            case 'decimal':

            case 'money':

            case 'numeric':

                if (preg_match('([A-Za-z]+\(([0-9]+)\,([0-9]+)\))', $tableColumn['complete_type'], $match)) {

                    $precision = $match[1];

                    $scale = $match[2];

                    $length = null;

                }

                break;

            case 'year':

                $length = null;

                break;

        }

        $options = array(

            'length'        => $length,

            'notnull'       => (bool) $tableColumn['isnotnull'],

            'default'       => $tableColumn['default'],

            'primary'       => (bool) ($tableColumn['pri'] == 't'),

            'precision'     => $precision,

            'scale'         => $scale,

            'fixed'         => $fixed,

            'unsigned'      => false,

            'autoincrement' => $autoincrement,

            'comment'       => $tableColumn['comment'],

        );

        return new Column($tableColumn['field'], \Doctrine\DBAL\Types\Type::getType($type), $options);

    }

}