203 lines
4.8 KiB
PHP
203 lines
4.8 KiB
PHP
<?php
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/**
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* FuzeWorks.
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*
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* The FuzeWorks MVC PHP FrameWork
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*
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* Copyright (C) 2015 TechFuze
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @author TechFuze
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* @copyright Copyright (c) 2013 - 2016, Techfuze. (http://techfuze.net)
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* @copyright Copyright (c) 1996 - 2015, Free Software Foundation, Inc. (http://www.fsf.org/)
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* @license http://opensource.org/licenses/GPL-3.0 GPLv3 License
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*
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* @link http://techfuze.net/fuzeworks
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* @since Version 0.0.1
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*
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* @version Version 1.0.0
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*/
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/**
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* SQLite Forge Class
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*
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* Converted from CodeIgniter.
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*
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* @package FuzeWorks
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* @category Database
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/user_guide/database/
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* @license http://opensource.org/licenses/MIT MIT License
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*/
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class FW_DB_sqlite_forge extends FW_DB_forge {
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/**
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* CREATE TABLE IF statement
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*
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* @var string
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*/
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protected $_create_table_if = FALSE;
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/**
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* UNSIGNED support
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*
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* @var bool|array
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*/
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protected $_unsigned = FALSE;
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/**
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* NULL value representation in CREATE/ALTER TABLE statements
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*
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* @var string
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*/
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protected $_null = 'NULL';
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// --------------------------------------------------------------------
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/**
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* Create database
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*
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* @param string $db_name (ignored)
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* @return bool
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*/
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public function create_database($db_name = '')
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{
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// In SQLite, a database is created when you connect to the database.
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// We'll return TRUE so that an error isn't generated
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return TRUE;
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}
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// --------------------------------------------------------------------
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/**
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* Drop database
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*
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* @param string $db_name (ignored)
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* @return bool
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*/
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public function drop_database($db_name = '')
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{
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if ( ! file_exists($this->db->database) OR ! @unlink($this->db->database))
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{
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return ($this->db->db_debug) ? $this->db->display_error('db_unable_to_drop') : FALSE;
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}
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elseif ( ! empty($this->db->data_cache['db_names']))
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{
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$key = array_search(strtolower($this->db->database), array_map('strtolower', $this->db->data_cache['db_names']), TRUE);
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if ($key !== FALSE)
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{
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unset($this->db->data_cache['db_names'][$key]);
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}
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}
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return TRUE;
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}
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// --------------------------------------------------------------------
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/**
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* ALTER TABLE
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*
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* @todo implement drop_column(), modify_column()
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* @param string $alter_type ALTER type
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* @param string $table Table name
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* @param mixed $field Column definition
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* @return string|string[]
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*/
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protected function _alter_table($alter_type, $table, $field)
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{
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if ($alter_type === 'DROP' OR $alter_type === 'CHANGE')
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{
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// drop_column():
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// BEGIN TRANSACTION;
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// CREATE TEMPORARY TABLE t1_backup(a,b);
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// INSERT INTO t1_backup SELECT a,b FROM t1;
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// DROP TABLE t1;
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// CREATE TABLE t1(a,b);
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// INSERT INTO t1 SELECT a,b FROM t1_backup;
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// DROP TABLE t1_backup;
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// COMMIT;
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return FALSE;
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}
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return parent::_alter_table($alter_type, $table, $field);
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}
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// --------------------------------------------------------------------
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/**
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* Process column
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*
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* @param array $field
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* @return string
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*/
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protected function _process_column($field)
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{
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return $this->db->escape_identifiers($field['name'])
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.' '.$field['type']
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.$field['auto_increment']
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.$field['null']
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.$field['unique']
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.$field['default'];
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}
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// --------------------------------------------------------------------
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/**
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* Field attribute TYPE
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*
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* Performs a data type mapping between different databases.
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*
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* @param array &$attributes
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* @return void
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*/
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protected function _attr_type(&$attributes)
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{
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switch (strtoupper($attributes['TYPE']))
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{
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case 'ENUM':
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case 'SET':
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$attributes['TYPE'] = 'TEXT';
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return;
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default: return;
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}
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}
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// --------------------------------------------------------------------
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/**
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* Field attribute AUTO_INCREMENT
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*
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* @param array &$attributes
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* @param array &$field
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* @return void
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*/
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protected function _attr_auto_increment(&$attributes, &$field)
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{
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if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE && stripos($field['type'], 'int') !== FALSE)
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{
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$field['type'] = 'INTEGER PRIMARY KEY';
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$field['default'] = '';
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$field['null'] = '';
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$field['unique'] = '';
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$field['auto_increment'] = ' AUTOINCREMENT';
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$this->primary_keys = array();
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}
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}
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}
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