<?php
// +----------------------------------------------------------------------+
// | PHP versions 4 and 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith |
// | All rights reserved. |
// +----------------------------------------------------------------------+
// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
// | API as well as database abstraction for PHP applications. |
// | This LICENSE is in the BSD license style. |
// | |
// | 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 Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
// | Lukas Smith nor the names of his 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 |
// | REGENTS 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: Lukas Smith <smith@backendmedia.com> |
// +----------------------------------------------------------------------+
//
// $Id$
//
require_once 'MDB2/Driver/Reverse/Common.php';
/**
* MDB2 SQlite driver for the schema reverse engineering module
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@backendmedia.com>
*/
class MDB2_Driver_Reverse_sqlite extends MDB2_Driver_Reverse_Common
{
function _getTableColumns($query)
{
$start_pos = strpos($query, '(');
$end_pos = strrpos($query, ')');
$column_def = substr($query, $start_pos+1, $end_pos-$start_pos-1);
$column_sql = split(',', $column_def);
$columns = array();
$count = count($column_sql);
if ($count == 0) {
return $db->raiseError('unexpected empty table column definition list');
}
$regexp = '/^([^ ]+) (CHAR|VARCHAR|VARCHAR2|TEXT|INT|INTEGER|BIGINT|DOUBLE|FLOAT|DATETIME|DATE|TIME|LONGTEXT|LONGBLOB)( PRIMARY)?( \(([1-9][0-9]*)(,([1-9][0-9]*))?\))?( DEFAULT (\'[^\']*\'|[^ ]+))?( NOT NULL)?$/i';
for ($i=0, $j=0; $i<$count; ++$i) {
if (!preg_match($regexp, $column_sql[$i], $matches)) {
return $db->raiseError('unexpected table column SQL definition');
}
$columns[$j]['name'] = $matches[1];
$columns[$j]['type'] = strtolower($matches[2]);
if (isset($matches[5]) && strlen($matches[5])) {
$columns[$j]['length'] = $matches[5];
}
if (isset($matches[7]) && strlen($matches[7])) {
$columns[$j]['decimal'] = $matches[7];
}
if (isset($matches[9]) && strlen($matches[9])) {
$default = $matches[9];
if (strlen($default) && $default[0]=="'") {
$default = str_replace("''", "'", substr($default, 1, strlen($default)-2));
}
$columns[$j]['default'] = $default;
}
if (isset($matches[10]) && strlen($matches[10])) {
$columns[$j]['notnull'] = true;
}
++$j;
}
return $columns;
}
// {{{ getTableFieldDefinition()
/**
* get the stucture of a field into an array
*
* @param string $table name of table that should be used in method
* @param string $field_name name of field that should be used in method
* @return mixed data array on success, a MDB2 error on failure
* @access public
*/
function getTableFieldDefinition($table, $field_name)
{
$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
$result = $db->loadModule('Datatype');
if (PEAR::isError($result)) {
return $result;
}
$query = "SELECT sql FROM sqlite_master WHERE type='table' AND name='$table'";
$query = $db->queryOne($query);
if (PEAR::isError($query)) {
return $query;
}
if (PEAR::isError($columns = $this->_getTableColumns($query))) {
return $columns;
}
foreach ($columns as $column) {
if ($db->options['portability'] & MDB2_PORTABILITY_LOWERCASE) {
$column['name'] = strtolower($column['name']);
} else {
$column = array_change_key_case($column, CASE_LOWER);
}
if ($field_name == $column['name']) {
list($types, $length) = $db->datatype->mapNativeDatatype($column);
unset($notnull);
if (isset($column['null']) && $column['null'] != 'YES') {
$notnull = true;
}
unset($default);
if (isset($column['default'])) {
$default = $column['default'];
}
$definition = array();
foreach ($types as $key => $type) {
$definition[0][$key] = array('type' => $type);
if (isset($notnull)) {
$definition[0][$key]['notnull'] = true;
}
if (isset($default)) {
$definition[0][$key]['default'] = $default;
}
if (isset($length)) {
$definition[0][$key]['length'] = $length;
}
}
// todo .. handle auto_inrement and primary keys
return $definition;
}
}
return $db->raiseError(MDB2_ERROR, null, null,
'getTableFieldDefinition: it was not specified an existing table column');
}
// }}}
// {{{ getTableIndexDefinition()
/**
* get the stucture of an index into an array
*
* @param string $table name of table that should be used in method
* @param string $index_name name of index that should be used in method
* @return mixed data array on success, a MDB2 error on failure
* @access public
*/
function getTableIndexDefinition($table, $index_name)
{
$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
if ($index_name == 'PRIMARY') {
return $db->raiseError(MDB2_ERROR, null, null,
'getTableIndexDefinition: PRIMARY is an hidden index');
}
$query = "SELECT sql FROM sqlite_master WHERE type='index' AND name='$index_name' AND tbl_name='$table' AND sql NOT NULL ORDER BY name";
$result = $db->query($query);
if (PEAR::isError($result)) {
return $result;
}
$columns = $result->getColumnNames();
$column = 'sql';
if (!isset($columns[$column])) {
$result->free();
return $db->raiseError('getTableIndexDefinition: show index does not return the table creation sql');
}
$query = strtolower($result->fetchOne());
$unique = strstr($query, ' unique ');
$key_name = $index_name;
$start_pos = strpos($query, '(');
$end_pos = strrpos($query, ')');
$column_names = substr($query, $start_pos+1, $end_pos-$start_pos-1);
$column_names = split(',', $column_names);
$definition = array();
if ($unique) {
$definition['unique'] = true;
}
$count = count($column_names);
for ($i=0; $i<$count; ++$i) {
$column_name = strtok($column_names[$i]," ");
$collation = strtok(" ");
$definition['fields'][$column_name] = array();
if (!empty($collation)) {
$definition['fields'][$column_name]['sorting'] = ($collation=='ASC' ? 'ascending' : 'descending');
}
}
$result->free();
if (!isset($definition['fields'])) {
return $db->raiseError(MDB2_ERROR, null, null,
'getTableIndexDefinition: it was not specified an existing table index');
}
return $definition;
}
// }}}
// {{{ tableInfo()
/**
* Returns information about a table
*
* @param string $result a string containing the name of a table
* @param int $mode a valid tableInfo mode
*
* @return array an associative array with the information requested.
* A MDB2_Error object on failure.
*
* @see MDB2_common::tableInfo()
* @since Method available since Release 1.7.0
*/
function tableInfo($result, $mode = null)
{
$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
if (is_string($result)) {
/*
* Probably received a table name.
* Create a result resource identifier.
*/
$id = $db->queryAll("PRAGMA table_info('$result');", null, MDB2_FETCHMODE_ASSOC);
$got_string = true;
} else {
return $db->raiseError(MDB2_ERROR_NOT_CAPABLE, null, null,
'This DBMS can not obtain tableInfo' .
' from result sets');
}
if ($db->options['portability'] & MDB2_PORTABILITY_LOWERCASE) {
$case_func = 'strtolower';
} else {
$case_func = 'strval';
}
$count = count($id);
$res = array();
if ($mode) {
$res['num_fields'] = $count;
}
for ($i = 0; $i < $count; $i++) {
if (strpos($id[$i]['type'], '(') !== false) {
$bits = explode('(', $id[$i]['type']);
$type = $bits[0];
$len = rtrim($bits[1],')');
} else {
$type = $id[$i]['type'];
$len = 0;
}
$flags = '';
if ($id[$i]['pk']) {
$flags .= 'primary_key ';
}
if ($id[$i]['notnull']) {
$flags .= 'not_null ';
}
if ($id[$i]['dflt_value'] !== null) {
$flags .= 'default_' . rawurlencode($id[$i]['dflt_value']);
}
$flags = trim($flags);
$res[$i] = array(
'table' => $case_func($result),
'name' => $case_func($id[$i]['name']),
'type' => $type,
'len' => $len,
'flags' => $flags,
);
if ($mode & MDB2_TABLEINFO_ORDER) {
$res['order'][$res[$i]['name']] = $i;
}
if ($mode & MDB2_TABLEINFO_ORDERTABLE) {
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
}
}
return $res;
}
}
?>