mConfig

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * mConfig
 * 
 * Library that handles database settings for mBlog
 * 
 * @author		Mark LaDoux <[email protected]>
 * @copyright	Copyright © 2012, Mark LaDoux
 * @version		2.0
 * @link		http://markladoux.com/
 */
 
class mConfig
{
	/**
	 * Configuration Table
	 * 
	 * @access	protected
	 * @since	1.0
	 * @static	string
	 */
	protected static $table;
 
	/**
	 * Class Constructor
	 * 
	 * Prepares the class for use and loads dependancies
	 * 
	 * @access	public
	 * @since	2.0
	 * @return	void
	 */
	public function __construct()
	{
		// Load static settings
		$this->config->load('mConfig');
		self::$table = $this->config->item('mConfig_table');
 
		// Load database
		$this->load->database();
	}
 
	/**
	 * Magic __get Function
	 * 
	 * Allows us to use the CI Super global without having to use aliases
	 * Shamelessly stolen from Ion Auth
	 * 
	 * @access	public
	 * @since	2.0
	 * @param	string
	 * @return	object
	 */
	public function __call($var)
	{
		return get_instance()->$var;
	}
 
	/**
	 * item
	 * 
	 * Retrieve item from mConfig database
	 * 
	 * @access	public
	 * @since	2.0
	 * @param	string			$item	configuration item to retrieve
	 * @param	bool			$check	Report existance of setting
	 * @return	mixed
	 */
	public function item($item, $check = FALSE)
	{
		// prepare query
		$this->db->where('item', $item);
		$query	= $this->db->get(self::$table);
 
		// if we have results, and we are in check mode, return TRUE
		if($check === TRUE && $query->num_rows() > 0)
		{
			return TRUE;
		}
 
		// check results
		if($query->num_rows() < 1)
		{
			// if we are in check mode, return FALSE
			if($check === TRUE)
			{
				return FALSE;
			}
 
			// otherwise return NULL
			return NULL;
		}
 
		// get data
		$row	= $query->results();
		$value	= $row->value;
 
		// filter data
		if(strtolower($value) == '{{false}}')	$value = FALSE;
		if(strtolower($value) == '{{true}}')	$value = TRUE;
		if(strtolower($value) == '{{null}}')	$value = NULL;
		if(strtolower($value) == '{{empty}}')	$value = '';
 
		// return data for processing
		return $value;
	}
 
	/**
	 * delete
	 * 
	 * Delete a value
	 * 
	 * @access	public
	 * @since	2.0
	 * @param	string			$item
	 * @return	void
	 */
	public function delete($item)
	{
		$this->db->where('item', $item);
		$this->db->delete(self::$table);
	}
 
	/**
	 * set
	 * 
	 * Set a value
	 * 
	 * @access	public
	 * @since	1.0
	 * @param	string			$item	item to set
	 * @param	string			$value	value of item
	 * @return	void
	 */
	public function set($item, $value)
	{
		// prepare value
		if($value === TRUE)		$value = '{{true}}';
		if($value === FALSE)	$value = '{{false}}';
		if($value === NULL)		$value = '{{null}}';
		if($value == '')		$value = '';
 
		// check if value exists
		$exists	= $this->item($item, TRUE);
 
		if($exists === TRUE)
		{
			$this->_update_item($item, $value);
		}
		else
		{
			$this->_create_item($item, $value);
		}
	}
 
	/**
	 * _update_item
	 * 
	 * Update a value in the database
	 * 
	 * @access	protected
	 * @since	2.0
	 * @param	string			$item	item to update
	 * @param	string			$value	new value to set
	 * @return	void	
	 */
	protected function _update_item($item, $value)
	{
		$data = array('value' => $value);
		$this->db->where('item', $item);
		$this->db->update(self::$table, $data);
	}
 
	/**
	 * _create_item
	 * 
	 * Create a new item/value pair in the database
	 * 
	 * @access	protected
	 * @since	2.0
	 * @param	string			$item	item to create
	 * @param	string			$value	value to set
	 * @return	void
	 */
	protected function _create_item($item, $value)
	{
		// prepare array
		$data	= array(
			'item'	=> $item,
			'value'	=> $value
			);
 
		// insert data
		$this->db->insert(self::$table, $data);
	}
}