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424 lines
11 KiB
424 lines
11 KiB
<?php |
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/** |
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* CodeIgniter |
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* |
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* An open source application development framework for PHP |
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* |
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* This content is released under the MIT License (MIT) |
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* |
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* Copyright (c) 2014 - 2018, British Columbia Institute of Technology |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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* |
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* @package CodeIgniter |
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* @author EllisLab Dev Team |
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) |
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* @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/) |
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* @license http://opensource.org/licenses/MIT MIT License |
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* @link https://codeigniter.com |
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* @since Version 1.0.0 |
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* @filesource |
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*/ |
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defined('BASEPATH') OR exit('No direct script access allowed'); |
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/** |
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* Database Utility Class |
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* |
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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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*/ |
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abstract class CI_DB_utility { |
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/** |
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* Database object |
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* |
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* @var object |
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*/ |
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protected $db; |
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// -------------------------------------------------------------------- |
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/** |
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* List databases statement |
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* |
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* @var string |
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*/ |
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protected $_list_databases = FALSE; |
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/** |
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* OPTIMIZE TABLE statement |
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* |
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* @var string |
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*/ |
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protected $_optimize_table = FALSE; |
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/** |
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* REPAIR TABLE statement |
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* |
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* @var string |
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*/ |
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protected $_repair_table = FALSE; |
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// -------------------------------------------------------------------- |
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/** |
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* Class constructor |
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* |
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* @param object &$db Database object |
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* @return void |
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*/ |
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public function __construct(&$db) |
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{ |
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$this->db =& $db; |
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log_message('info', 'Database Utility Class Initialized'); |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* List databases |
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* |
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* @return array |
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*/ |
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public function list_databases() |
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{ |
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// Is there a cached result? |
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if (isset($this->db->data_cache['db_names'])) |
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{ |
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return $this->db->data_cache['db_names']; |
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} |
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elseif ($this->_list_databases === FALSE) |
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{ |
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return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE; |
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} |
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$this->db->data_cache['db_names'] = array(); |
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$query = $this->db->query($this->_list_databases); |
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if ($query === FALSE) |
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{ |
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return $this->db->data_cache['db_names']; |
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} |
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for ($i = 0, $query = $query->result_array(), $c = count($query); $i < $c; $i++) |
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{ |
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$this->db->data_cache['db_names'][] = current($query[$i]); |
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} |
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return $this->db->data_cache['db_names']; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Determine if a particular database exists |
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* |
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* @param string $database_name |
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* @return bool |
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*/ |
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public function database_exists($database_name) |
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{ |
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return in_array($database_name, $this->list_databases()); |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Optimize Table |
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* |
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* @param string $table_name |
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* @return mixed |
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*/ |
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public function optimize_table($table_name) |
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{ |
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if ($this->_optimize_table === FALSE) |
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{ |
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return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE; |
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} |
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$query = $this->db->query(sprintf($this->_optimize_table, $this->db->escape_identifiers($table_name))); |
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if ($query !== FALSE) |
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{ |
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$query = $query->result_array(); |
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return current($query); |
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} |
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return FALSE; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Optimize Database |
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* |
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* @return mixed |
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*/ |
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public function optimize_database() |
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{ |
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if ($this->_optimize_table === FALSE) |
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{ |
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return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE; |
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} |
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$result = array(); |
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foreach ($this->db->list_tables() as $table_name) |
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{ |
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$res = $this->db->query(sprintf($this->_optimize_table, $this->db->escape_identifiers($table_name))); |
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if (is_bool($res)) |
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{ |
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return $res; |
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} |
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// Build the result array... |
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$res = $res->result_array(); |
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$res = current($res); |
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$key = str_replace($this->db->database.'.', '', current($res)); |
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$keys = array_keys($res); |
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unset($res[$keys[0]]); |
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$result[$key] = $res; |
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} |
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return $result; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Repair Table |
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* |
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* @param string $table_name |
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* @return mixed |
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*/ |
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public function repair_table($table_name) |
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{ |
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if ($this->_repair_table === FALSE) |
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{ |
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return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE; |
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} |
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$query = $this->db->query(sprintf($this->_repair_table, $this->db->escape_identifiers($table_name))); |
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if (is_bool($query)) |
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{ |
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return $query; |
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} |
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$query = $query->result_array(); |
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return current($query); |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Generate CSV from a query result object |
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* |
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* @param object $query Query result object |
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* @param string $delim Delimiter (default: ,) |
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* @param string $newline Newline character (default: \n) |
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* @param string $enclosure Enclosure (default: ") |
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* @return string |
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*/ |
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public function csv_from_result($query, $delim = ',', $newline = "\n", $enclosure = '"') |
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{ |
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if ( ! is_object($query) OR ! method_exists($query, 'list_fields')) |
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{ |
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show_error('You must submit a valid result object'); |
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} |
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$out = ''; |
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// First generate the headings from the table column names |
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foreach ($query->list_fields() as $name) |
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{ |
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$out .= $enclosure.str_replace($enclosure, $enclosure.$enclosure, $name).$enclosure.$delim; |
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} |
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$out = substr($out, 0, -strlen($delim)).$newline; |
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// Next blast through the result array and build out the rows |
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while ($row = $query->unbuffered_row('array')) |
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{ |
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$line = array(); |
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foreach ($row as $item) |
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{ |
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$line[] = $enclosure.str_replace($enclosure, $enclosure.$enclosure, $item).$enclosure; |
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} |
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$out .= implode($delim, $line).$newline; |
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} |
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return $out; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Generate XML data from a query result object |
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* |
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* @param object $query Query result object |
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* @param array $params Any preferences |
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* @return string |
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*/ |
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public function xml_from_result($query, $params = array()) |
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{ |
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if ( ! is_object($query) OR ! method_exists($query, 'list_fields')) |
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{ |
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show_error('You must submit a valid result object'); |
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} |
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// Set our default values |
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foreach (array('root' => 'root', 'element' => 'element', 'newline' => "\n", 'tab' => "\t") as $key => $val) |
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{ |
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if ( ! isset($params[$key])) |
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{ |
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$params[$key] = $val; |
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} |
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} |
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// Create variables for convenience |
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extract($params); |
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// Load the xml helper |
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get_instance()->load->helper('xml'); |
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// Generate the result |
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$xml = '<'.$root.'>'.$newline; |
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while ($row = $query->unbuffered_row()) |
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{ |
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$xml .= $tab.'<'.$element.'>'.$newline; |
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foreach ($row as $key => $val) |
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{ |
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$xml .= $tab.$tab.'<'.$key.'>'.xml_convert($val).'</'.$key.'>'.$newline; |
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} |
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$xml .= $tab.'</'.$element.'>'.$newline; |
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} |
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return $xml.'</'.$root.'>'.$newline; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Database Backup |
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* |
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* @param array $params |
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* @return string |
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*/ |
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public function backup($params = array()) |
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{ |
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// If the parameters have not been submitted as an |
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// array then we know that it is simply the table |
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// name, which is a valid short cut. |
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if (is_string($params)) |
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{ |
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$params = array('tables' => $params); |
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} |
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// Set up our default preferences |
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$prefs = array( |
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'tables' => array(), |
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'ignore' => array(), |
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'filename' => '', |
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'format' => 'gzip', // gzip, zip, txt |
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'add_drop' => TRUE, |
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'add_insert' => TRUE, |
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'newline' => "\n", |
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'foreign_key_checks' => TRUE |
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); |
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// Did the user submit any preferences? If so set them.... |
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if (count($params) > 0) |
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{ |
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foreach ($prefs as $key => $val) |
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{ |
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if (isset($params[$key])) |
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{ |
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$prefs[$key] = $params[$key]; |
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} |
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} |
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} |
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// Are we backing up a complete database or individual tables? |
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// If no table names were submitted we'll fetch the entire table list |
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if (count($prefs['tables']) === 0) |
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{ |
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$prefs['tables'] = $this->db->list_tables(); |
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} |
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// Validate the format |
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if ( ! in_array($prefs['format'], array('gzip', 'zip', 'txt'), TRUE)) |
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{ |
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$prefs['format'] = 'txt'; |
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} |
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// Is the encoder supported? If not, we'll either issue an |
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// error or use plain text depending on the debug settings |
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if (($prefs['format'] === 'gzip' && ! function_exists('gzencode')) |
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OR ($prefs['format'] === 'zip' && ! function_exists('gzcompress'))) |
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{ |
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if ($this->db->db_debug) |
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{ |
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return $this->db->display_error('db_unsupported_compression'); |
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} |
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$prefs['format'] = 'txt'; |
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} |
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// Was a Zip file requested? |
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if ($prefs['format'] === 'zip') |
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{ |
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// Set the filename if not provided (only needed with Zip files) |
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if ($prefs['filename'] === '') |
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{ |
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$prefs['filename'] = (count($prefs['tables']) === 1 ? $prefs['tables'] : $this->db->database) |
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.date('Y-m-d_H-i', time()).'.sql'; |
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} |
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else |
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{ |
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// If they included the .zip file extension we'll remove it |
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if (preg_match('|.+?\.zip$|', $prefs['filename'])) |
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{ |
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$prefs['filename'] = str_replace('.zip', '', $prefs['filename']); |
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} |
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// Tack on the ".sql" file extension if needed |
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if ( ! preg_match('|.+?\.sql$|', $prefs['filename'])) |
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{ |
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$prefs['filename'] .= '.sql'; |
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} |
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} |
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// Load the Zip class and output it |
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$CI =& get_instance(); |
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$CI->load->library('zip'); |
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$CI->zip->add_data($prefs['filename'], $this->_backup($prefs)); |
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return $CI->zip->get_zip(); |
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} |
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elseif ($prefs['format'] === 'txt') // Was a text file requested? |
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{ |
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return $this->_backup($prefs); |
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} |
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elseif ($prefs['format'] === 'gzip') // Was a Gzip file requested? |
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{ |
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return gzencode($this->_backup($prefs)); |
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} |
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return; |
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} |
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}
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