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<?php defined('BASEPATH') or exit('No direct script access allowed');

/**
 * Slug
 *
 * A simple slug generator for CodeIgniter.
 * Path: addons/shared_addons/modules/<module_name>/libraries/Slug.php
 */

class Slug
{

  /*
	 * Constructor
	 * 
	 */
	public function __construct()
	{
		 $this->CI =& get_instance();
		 $this->CI->load->helper('url');
		
	}
	/*
	* Creates a unique slug. If a slug with the same name already exists in the DB, a number will be appended at the end of the string.
	* Example: item-1, item-2, ...
	* 
	* @param	string	$string
	* @param	string	$table
	* @return	string
	*/
	public function create_unique_slug($string, $table)
	{
		//Creates a human-friendly URL string with dashes
	    $slug = url_title($string);
		//Make the string lowercase
	    $slug = strtolower($slug);
		//Set the initial counter to append at the end of the string (if duplicate)
	    $i = 0;
	    $params = array ();
	    $params['slug'] = $slug;
		//Check if POST contains an 'id'. If it does, exclude the actual post in the check
	    if ($this->input->post('id')) {
	        $params['id !='] = $this->input->post('id');
	    }
	    
	    while ($this->db->where($params)->get($table)->num_rows()) {
	        if (!preg_match ('/-{1}[0-9]+$/', $slug )) {
	            $slug .= '-' . ++$i;
	        } else {
	            $slug = preg_replace ('/[0-9]+$/', ++$i, $slug );
	        }
	        $params ['slug'] = $slug;
	        }
	    return $slug;
	} 

}