<?php
/**
 * FuzeWorks.
 *
 * The FuzeWorks MVC PHP FrameWork
 *
 * Copyright (C) 2015   TechFuze
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @author    TechFuze
 * @copyright Copyright (c) 2013 - 2016, Techfuze. (http://techfuze.net)
 * @copyright Copyright (c) 1996 - 2015, Free Software Foundation, Inc. (http://www.fsf.org/)
 * @license   http://opensource.org/licenses/GPL-3.0 GPLv3 License
 *
 * @link  http://techfuze.net/fuzeworks
 * @since Version 0.0.1
 *
 * @version Version 1.0.0
 */

/**
 * PDO Result Class
 *
 * This class extends the parent result class: FW_DB_result
 *
 * Converted from CodeIgniter.
 *
 * @package		FuzeWorks
 * @subpackage	Drivers
 * @category	Database
 * @author		EllisLab Dev Team
 * @link		https://codeigniter.com/user_guide/database/
 * @license		http://opensource.org/licenses/MIT	MIT License
 */
class FW_DB_pdo_result extends FW_DB_result {

	/**
	 * Number of rows in the result set
	 *
	 * @return	int
	 */
	public function num_rows()
	{
		if (is_int($this->num_rows))
		{
			return $this->num_rows;
		}
		elseif (count($this->result_array) > 0)
		{
			return $this->num_rows = count($this->result_array);
		}
		elseif (count($this->result_object) > 0)
		{
			return $this->num_rows = count($this->result_object);
		}
		elseif (($num_rows = $this->result_id->rowCount()) > 0)
		{
			return $this->num_rows = $num_rows;
		}

		return $this->num_rows = count($this->result_array());
	}

	// --------------------------------------------------------------------

	/**
	 * Number of fields in the result set
	 *
	 * @return	int
	 */
	public function num_fields()
	{
		return $this->result_id->columnCount();
	}

	// --------------------------------------------------------------------

	/**
	 * Fetch Field Names
	 *
	 * Generates an array of column names
	 *
	 * @return	bool
	 */
	public function list_fields()
	{
		$field_names = array();
		for ($i = 0, $c = $this->num_fields(); $i < $c; $i++)
		{
			// Might trigger an E_WARNING due to not all subdrivers
			// supporting getColumnMeta()
			$field_names[$i] = @$this->result_id->getColumnMeta($i);
			$field_names[$i] = $field_names[$i]['name'];
		}

		return $field_names;
	}

	// --------------------------------------------------------------------

	/**
	 * Field data
	 *
	 * Generates an array of objects containing field meta-data
	 *
	 * @return	array
	 */
	public function field_data()
	{
		try
		{
			$retval = array();

			for ($i = 0, $c = $this->num_fields(); $i < $c; $i++)
			{
				$field = $this->result_id->getColumnMeta($i);

				$retval[$i]			= new stdClass();
				$retval[$i]->name		= $field['name'];
				$retval[$i]->type		= $field['native_type'];
				$retval[$i]->max_length		= ($field['len'] > 0) ? $field['len'] : NULL;
				$retval[$i]->primary_key	= (int) ( ! empty($field['flags']) && in_array('primary_key', $field['flags'], TRUE));
			}

			return $retval;
		}
		catch (Exception $e)
		{
			if ($this->db->db_debug)
			{
				return $this->db->display_error('db_unsupported_feature');
			}

			return FALSE;
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Free the result
	 *
	 * @return	void
	 */
	public function free_result()
	{
		if (is_object($this->result_id))
		{
			$this->result_id = FALSE;
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Result - associative array
	 *
	 * Returns the result set as an array
	 *
	 * @return	array
	 */
	protected function _fetch_assoc()
	{
		return $this->result_id->fetch(PDO::FETCH_ASSOC);
	}

	// --------------------------------------------------------------------

	/**
	 * Result - object
	 *
	 * Returns the result set as an object
	 *
	 * @param	string	$class_name
	 * @return	object
	 */
	protected function _fetch_object($class_name = 'stdClass')
	{
		return $this->result_id->fetchObject($class_name);
	}

}