<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); /** * Code Igniter * * An open source application development framework for PHP 4.3.2 or newer * * @package CodeIgniter * @author ExpressionEngine Dev Team * @copyright Copyright (c) 2008 - 2009, EllisLab, Inc. * @license http://codeigniter.com/user_guide/license.html * @link http://codeigniter.com * @since Version 1.0 * @filesource */ // ------------------------------------------------------------------------ /** * Database Utility Class * * @category Database * @author ExpressionEngine Dev Team * @link http://codeigniter.com/user_guide/database/ */ class CI_DB_forge { var $fields = array(); var $keys = array(); var $primary_keys = array(); var $db_char_set = ''; /** * Constructor * * Grabs the CI super object instance so we can access it. * */ function CI_DB_forge() { // Assign the main database object to $this->db $CI =& get_instance(); $this->db =& $CI->db; log_message('debug', "Database Forge Class Initialized"); } // -------------------------------------------------------------------- /** * Create database * * @access public * @param string the database name * @return bool */ function create_database($db_name) { $sql = $this->_create_database($db_name); if (is_bool($sql)) { return $sql; } return $this->db->query($sql); } // -------------------------------------------------------------------- /** * Drop database * * @access public * @param string the database name * @return bool */ function drop_database($db_name) { $sql = $this->_drop_database($db_name); if (is_bool($sql)) { return $sql; } return $this->db->query($sql); } // -------------------------------------------------------------------- /** * Add Key * * @access public * @param string key * @param string type * @return void */ function add_key($key = '', $primary = FALSE) { if (is_array($key)) { foreach($key as $one) { $this->add_key($one, $primary); } return; } if ($key == '') { show_error('Key information is required for that operation.'); } if ($primary === TRUE) { $this->primary_keys[] = $key; } else { $this->keys[] = $key; } } // -------------------------------------------------------------------- /** * Add Field * * @access public * @param string collation * @return void */ function add_field($field = '') { if ($field == '') { show_error('Field information is required.'); } if (is_string($field)) { if ($field == 'id') { $this->add_field(array( 'id' => array( 'type' => 'INT', 'constraint' => 9, 'auto_increment' => TRUE ) )); $this->add_key('id', TRUE); } else { if (strpos($field, ' ') === FALSE) { show_error('Field information is required for that operation.'); } $this->fields[] = $field; } } if (is_array($field)) { $this->fields = array_merge($this->fields, $field); } } // -------------------------------------------------------------------- /** * Create Table * * @access public * @param string the table name * @return bool */ function create_table($table = '', $if_not_exists = FALSE) { if ($table == '') { show_error('A table name is required for that operation.'); } if (count($this->fields) == 0) { show_error('Field information is required.'); } $sql = $this->_create_table($this->db->dbprefix.$table, $this->fields, $this->primary_keys, $this->keys, $if_not_exists); $this->_reset(); return $this->db->query($sql); } // -------------------------------------------------------------------- /** * Drop Table * * @access public * @param string the table name * @return bool */ function drop_table($table_name) { $sql = $this->_drop_table($this->db->dbprefix.$table_name); if (is_bool($sql)) { return $sql; } return $this->db->query($sql); } // -------------------------------------------------------------------- /** * Rename Table * * @access public * @param string the old table name * @param string the new table name * @return bool */ function rename_table($table_name, $new_table_name) { if ($table_name == '' OR $new_table_name == '') { show_error('A table name is required for that operation.'); } $sql = $this->_rename_table($table_name, $new_table_name); return $this->db->query($sql); } // -------------------------------------------------------------------- /** * Column Add * * @access public * @param string the table name * @param string the column name * @param string the column definition * @return bool */ function add_column($table = '', $field = array(), $after_field = '') { if ($table == '') { show_error('A table name is required for that operation.'); } // add field info into field array, but we can only do one at a time // so we cycle through foreach ($field as $k => $v) { $this->add_field(array($k => $field[$k])); if (count($this->fields) == 0) { show_error('Field information is required.'); } $sql = $this->_alter_table('ADD', $this->db->dbprefix.$table, $this->fields, $after_field); $this->_reset(); if ($this->db->query($sql) === FALSE) { return FALSE; } } return TRUE; } // -------------------------------------------------------------------- /** * Column Drop * * @access public * @param string the table name * @param string the column name * @return bool */ function drop_column($table = '', $column_name = '') { if ($table == '') { show_error('A table name is required for that operation.'); } if ($column_name == '') { show_error('A column name is required for that operation.'); } $sql = $this->_alter_table('DROP', $this->db->dbprefix.$table, $column_name); return $this->db->query($sql); } // -------------------------------------------------------------------- /** * Column Modify * * @access public * @param string the table name * @param string the column name * @param string the column definition * @return bool */ function modify_column($table = '', $field = array()) { if ($table == '') { show_error('A table name is required for that operation.'); } // add field info into field array, but we can only do one at a time // so we cycle through foreach ($field as $k => $v) { $this->add_field(array($k => $field[$k])); if (count($this->fields) == 0) { show_error('Field information is required.'); } $sql = $this->_alter_table('CHANGE', $this->db->dbprefix.$table, $this->fields); $this->_reset(); if ($this->db->query($sql) === FALSE) { return FALSE; } } return TRUE; } // -------------------------------------------------------------------- /** * Reset * * Resets table creation vars * * @access private * @return void */ function _reset() { $this->fields = array(); $this->keys = array(); $this->primary_keys = array(); } } /* End of file DB_forge.php */ /* Location: ./system/database/DB_forge.php */