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<?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 - 2016, 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 - 2016, 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 1.3.0
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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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 * MySQLi Result Class
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 *
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 * This class extends the parent result class: CI_DB_result
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 *
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 * @package		CodeIgniter
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 * @subpackage	Drivers
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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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class CI_DB_mysqli_result extends CI_DB_result {
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	/**
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	 * Number of rows in the result set
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	 *
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	 * @return	int
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	 */
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	public function num_rows()
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	{
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		return is_int($this->num_rows)
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			? $this->num_rows
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			: $this->num_rows = $this->result_id->num_rows;
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	}
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	// --------------------------------------------------------------------
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	/**
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	 * Number of fields in the result set
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	 *
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	 * @return	int
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	 */
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	public function num_fields()
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	{
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		return $this->result_id->field_count;
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	}
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	// --------------------------------------------------------------------
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	/**
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	 * Fetch Field Names
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	 *
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	 * Generates an array of column names
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	 *
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	 * @return	array
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	 */
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	public function list_fields()
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	{
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		$field_names = array();
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		$this->result_id->field_seek(0);
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		while ($field = $this->result_id->fetch_field())
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		{
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			$field_names[] = $field->name;
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		}
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		return $field_names;
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	}
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	// --------------------------------------------------------------------
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	/**
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	 * Field data
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	 *
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	 * Generates an array of objects containing field meta-data
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	 *
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	 * @return	array
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	 */
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	public function field_data()
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	{
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		$retval = array();
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		$field_data = $this->result_id->fetch_fields();
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		for ($i = 0, $c = count($field_data); $i < $c; $i++)
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		{
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			$retval[$i]			= new stdClass();
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			$retval[$i]->name		= $field_data[$i]->name;
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			$retval[$i]->type		= $field_data[$i]->type;
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			$retval[$i]->max_length		= $field_data[$i]->max_length;
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			$retval[$i]->primary_key	= (int) ($field_data[$i]->flags & 2);
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			$retval[$i]->default		= $field_data[$i]->def;
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		}
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		return $retval;
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	}
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	// --------------------------------------------------------------------
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	/**
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	 * Free the result
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	 *
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	 * @return	void
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	 */
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	public function free_result()
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	{
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		if (is_object($this->result_id))
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		{
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			$this->result_id->free();
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			$this->result_id = FALSE;
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		}
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	}
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	// --------------------------------------------------------------------
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	/**
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	 * Data Seek
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	 *
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	 * Moves the internal pointer to the desired offset. We call
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	 * this internally before fetching results to make sure the
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	 * result set starts at zero.
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	 *
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	 * @param	int	$n
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	 * @return	bool
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	 */
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	public function data_seek($n = 0)
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	{
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		return $this->result_id->data_seek($n);
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	}
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	// --------------------------------------------------------------------
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	/**
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	 * Result - associative array
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	 *
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	 * Returns the result set as an array
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	 *
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	 * @return	array
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	 */
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	protected function _fetch_assoc()
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	{
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		return $this->result_id->fetch_assoc();
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	}
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	// --------------------------------------------------------------------
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	/**
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	 * Result - object
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	 *
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	 * Returns the result set as an object
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	 *
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	 * @param	string	$class_name
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	 * @return	object
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	 */
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	protected function _fetch_object($class_name = 'stdClass')
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	{
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		return $this->result_id->fetch_object($class_name);
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	}
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}