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<?php/*** CodeIgniter** An open source application development framework for PHP** This content is released under the MIT License (MIT)** Copyright (c) 2014 - 2016, British Columbia Institute of Technology** Permission is hereby granted, free of charge, to any person obtaining a copy* of this software and associated documentation files (the "Software"), to deal* in the Software without restriction, including without limitation the rights* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell* copies of the Software, and to permit persons to whom the Software is* furnished to do so, subject to the following conditions:** The above copyright notice and this permission notice shall be included in* all copies or substantial portions of the Software.** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN* THE SOFTWARE.** @package CodeIgniter* @author EllisLab Dev Team* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)* @copyright Copyright (c) 2014 - 2016, British Columbia Institute of Technology (http://bcit.ca/)* @license http://opensource.org/licenses/MIT MIT License* @link https://codeigniter.com* @since Version 3.0.0* @filesource*/defined('BASEPATH') OR exit('No direct script access allowed');/*** SQLite3 Database Adapter Class** Note: _DB is an extender class that the app controller* creates dynamically based on whether the query builder* class is being used or not.** @package CodeIgniter* @subpackage Drivers* @category Database* @author Andrey Andreev* @link https://codeigniter.com/user_guide/database/*/class CI_DB_sqlite3_driver extends CI_DB {/*** Database driver** @var string*/public $dbdriver = 'sqlite3';// --------------------------------------------------------------------/*** ORDER BY random keyword** @var array*/protected $_random_keyword = array('RANDOM()', 'RANDOM()');// --------------------------------------------------------------------/*** Non-persistent database connection** @param bool $persistent* @return SQLite3*/public function db_connect($persistent = FALSE){if ($persistent){log_message('debug', 'SQLite3 doesn\'t support persistent connections');}try{return ( ! $this->password)? new SQLite3($this->database): new SQLite3($this->database, SQLITE3_OPEN_READWRITE | SQLITE3_OPEN_CREATE, $this->password);}catch (Exception $e){return FALSE;}}// --------------------------------------------------------------------/*** Database version number** @return string*/public function version(){if (isset($this->data_cache['version'])){return $this->data_cache['version'];}$version = SQLite3::version();return $this->data_cache['version'] = $version['versionString'];}// --------------------------------------------------------------------/*** Execute the query** @todo Implement use of SQLite3::querySingle(), if needed* @param string $sql* @return mixed SQLite3Result object or bool*/protected function _execute($sql){return $this->is_write_type($sql)? $this->conn_id->exec($sql): $this->conn_id->query($sql);}// --------------------------------------------------------------------/*** Begin Transaction** @return bool*/protected function _trans_begin(){return $this->conn_id->exec('BEGIN TRANSACTION');}// --------------------------------------------------------------------/*** Commit Transaction** @return bool*/protected function _trans_commit(){return $this->conn_id->exec('END TRANSACTION');}// --------------------------------------------------------------------/*** Rollback Transaction** @return bool*/protected function _trans_rollback(){return $this->conn_id->exec('ROLLBACK');}// --------------------------------------------------------------------/*** Platform-dependant string escape** @param string* @return string*/protected function _escape_str($str){return $this->conn_id->escapeString($str);}// --------------------------------------------------------------------/*** Affected Rows** @return int*/public function affected_rows(){return $this->conn_id->changes();}// --------------------------------------------------------------------/*** Insert ID** @return int*/public function insert_id(){return $this->conn_id->lastInsertRowID();}// --------------------------------------------------------------------/*** Show table query** Generates a platform-specific query string so that the table names can be fetched** @param bool $prefix_limit* @return string*/protected function _list_tables($prefix_limit = FALSE){return 'SELECT "NAME" FROM "SQLITE_MASTER" WHERE "TYPE" = \'table\''.(($prefix_limit !== FALSE && $this->dbprefix != '')? ' AND "NAME" LIKE \''.$this->escape_like_str($this->dbprefix).'%\' '.sprintf($this->_like_escape_str, $this->_like_escape_chr): '');}// --------------------------------------------------------------------/*** Fetch Field Names** @param string $table Table name* @return array*/public function list_fields($table){// Is there a cached result?if (isset($this->data_cache['field_names'][$table])){return $this->data_cache['field_names'][$table];}if (($result = $this->query('PRAGMA TABLE_INFO('.$this->protect_identifiers($table, TRUE, NULL, FALSE).')')) === FALSE){return FALSE;}$this->data_cache['field_names'][$table] = array();foreach ($result->result_array() as $row){$this->data_cache['field_names'][$table][] = $row['name'];}return $this->data_cache['field_names'][$table];}// --------------------------------------------------------------------/*** Returns an object with field data** @param string $table* @return array*/public function field_data($table){if (($query = $this->query('PRAGMA TABLE_INFO('.$this->protect_identifiers($table, TRUE, NULL, FALSE).')')) === FALSE){return FALSE;}$query = $query->result_array();if (empty($query)){return FALSE;}$retval = array();for ($i = 0, $c = count($query); $i < $c; $i++){$retval[$i] = new stdClass();$retval[$i]->name = $query[$i]['name'];$retval[$i]->type = $query[$i]['type'];$retval[$i]->max_length = NULL;$retval[$i]->default = $query[$i]['dflt_value'];$retval[$i]->primary_key = isset($query[$i]['pk']) ? (int) $query[$i]['pk'] : 0;}return $retval;}// --------------------------------------------------------------------/*** Error** Returns an array containing code and message of the last* database error that has occured.** @return array*/public function error(){return array('code' => $this->conn_id->lastErrorCode(), 'message' => $this->conn_id->lastErrorMsg());}// --------------------------------------------------------------------/*** Replace statement** Generates a platform-specific replace string from the supplied data** @param string $table Table name* @param array $keys INSERT keys* @param array $values INSERT values* @return string*/protected function _replace($table, $keys, $values){return 'INSERT OR '.parent::_replace($table, $keys, $values);}// --------------------------------------------------------------------/*** Truncate statement** Generates a platform-specific truncate string from the supplied data** If the database does not support the TRUNCATE statement,* then this method maps to 'DELETE FROM table'** @param string $table* @return string*/protected function _truncate($table){return 'DELETE FROM '.$table;}// --------------------------------------------------------------------/*** Close DB Connection** @return void*/protected function _close(){$this->conn_id->close();}}