2009-07-21 08:04:48 +09:00
|
|
|
<?php
|
|
|
|
/**
|
|
|
|
* Laconica, the distributed open-source microblogging tool
|
|
|
|
*
|
|
|
|
* Database schema utilities
|
|
|
|
*
|
|
|
|
* PHP version 5
|
|
|
|
*
|
|
|
|
* LICENCE: This program is free software: you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
|
|
* (at your option) any later version.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU Affero General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
*
|
|
|
|
* @category Database
|
|
|
|
* @package Laconica
|
|
|
|
* @author Evan Prodromou <evan@controlyourself.ca>
|
|
|
|
* @copyright 2009 Control Yourself, Inc.
|
|
|
|
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
|
|
|
|
* @link http://laconi.ca/
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (!defined('LACONICA')) {
|
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Class representing the database schema
|
|
|
|
*
|
|
|
|
* A class representing the database schema. Can be used to
|
|
|
|
* manipulate the schema -- especially for plugins and upgrade
|
|
|
|
* utilities.
|
|
|
|
*
|
|
|
|
* @category Database
|
|
|
|
* @package Laconica
|
|
|
|
* @author Evan Prodromou <evan@controlyourself.ca>
|
|
|
|
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
|
|
|
|
* @link http://laconi.ca/
|
|
|
|
*/
|
|
|
|
|
|
|
|
class Schema
|
|
|
|
{
|
2009-08-25 00:22:40 +09:00
|
|
|
static $_single = null;
|
|
|
|
protected $conn = null;
|
2009-07-21 08:04:48 +09:00
|
|
|
|
2009-08-25 00:22:40 +09:00
|
|
|
protected function __construct()
|
2009-07-21 08:04:48 +09:00
|
|
|
{
|
2009-08-25 00:22:40 +09:00
|
|
|
// XXX: there should be an easier way to do this.
|
|
|
|
$user = new User();
|
|
|
|
$this->conn = $user->getDatabaseConnection();
|
|
|
|
$user->free();
|
|
|
|
unset($user);
|
|
|
|
}
|
2009-07-21 08:04:48 +09:00
|
|
|
|
2009-08-25 00:22:40 +09:00
|
|
|
static function get()
|
|
|
|
{
|
|
|
|
if (empty(self::$_single)) {
|
|
|
|
self::$_single = new Schema();
|
|
|
|
}
|
|
|
|
return self::$_single;
|
2009-07-21 08:04:48 +09:00
|
|
|
}
|
|
|
|
|
|
|
|
public function getTableDef($name)
|
|
|
|
{
|
2009-08-25 00:22:40 +09:00
|
|
|
$res =& $this->conn->query('DESCRIBE ' . $name);
|
|
|
|
|
|
|
|
if (PEAR::isError($res)) {
|
|
|
|
throw new Exception($res->getMessage());
|
|
|
|
}
|
|
|
|
|
|
|
|
$td = new TableDef();
|
|
|
|
|
|
|
|
$td->name = $name;
|
|
|
|
$td->columns = array();
|
|
|
|
|
|
|
|
$row = array();
|
|
|
|
|
|
|
|
while ($res->fetchInto($row, DB_FETCHMODE_ASSOC)) {
|
|
|
|
|
|
|
|
$cd = new ColumnDef();
|
|
|
|
|
|
|
|
$cd->name = $row['Field'];
|
|
|
|
|
|
|
|
$packed = $row['Type'];
|
|
|
|
|
|
|
|
if (preg_match('/^(\w+)\((\d+)\)$/', $packed, $match)) {
|
|
|
|
$cd->type = $match[1];
|
|
|
|
$cd->size = $match[2];
|
|
|
|
} else {
|
|
|
|
$cd->type = $packed;
|
|
|
|
}
|
|
|
|
|
|
|
|
$cd->nullable = ($row['Null'] == 'YES') ? true : false;
|
|
|
|
$cd->key = $row['Key'];
|
|
|
|
$cd->default = $row['Default'];
|
|
|
|
$cd->extra = $row['Extra'];
|
|
|
|
|
|
|
|
$td->columns[] = $cd;
|
|
|
|
}
|
|
|
|
|
|
|
|
return $td;
|
2009-07-21 08:04:48 +09:00
|
|
|
}
|
|
|
|
|
|
|
|
public function getColumnDef($table, $column)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
public function getIndexDef($table, $index)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
public function createTable($name, $columns, $indices=null)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
public function dropTable($name)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
public function createIndex($name, $table, $columns)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
public function dropIndex($name, $table)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
public function addColumn($table, $columndef)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
public function modifyColumn($table, $column, $columndef)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
public function dropColumn($table, $column)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
public function ensureTable($name, $columns, $indices)
|
|
|
|
{
|
|
|
|
$def = $this->tableDef($name);
|
|
|
|
if (empty($def)) {
|
|
|
|
return $this->createTable($name, $columns, $indices);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
class TableDef
|
|
|
|
{
|
|
|
|
public $name;
|
|
|
|
public $columns;
|
|
|
|
}
|
|
|
|
|
|
|
|
class ColumnDef
|
|
|
|
{
|
|
|
|
public $name;
|
|
|
|
public $type;
|
|
|
|
public $size;
|
2009-08-25 00:22:40 +09:00
|
|
|
public $nullable;
|
|
|
|
public $key;
|
|
|
|
public $default;
|
|
|
|
public $extra;
|
2009-07-21 08:04:48 +09:00
|
|
|
}
|
|
|
|
|
|
|
|
class IndexDef
|
|
|
|
{
|
|
|
|
public $name;
|
|
|
|
public $table;
|
|
|
|
public $columns;
|
|
|
|
}
|