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


/**


 * CodeIgniter


 *


 * An open source application development framework for PHP 5.1.6 or newer


 *


 * @package		CodeIgniter


 * @author		EllisLab Dev Team


 * @copyright		Copyright (c) 2008 - 2014, EllisLab, Inc.


 * @copyright		Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)


 * @license		http://codeigniter.com/user_guide/license.html


 * @link		http://codeigniter.com


 * @since		Version 1.0


 * @filesource


 */





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





/**


 * Pagination Class


 *


 * @package		CodeIgniter


 * @subpackage	Libraries


 * @category	Pagination


 * @author		EllisLab Dev Team


 * @link		http://codeigniter.com/user_guide/libraries/pagination.html


 */


class CI_Pagination {





	var $base_url			= ''; // The page we are linking to


	var $prefix				= ''; // A custom prefix added to the path.


	var $suffix				= ''; // A custom suffix added to the path.





	var $total_rows			=  0; // Total number of items (database results)


	var $per_page			= 10; // Max number of items you want shown per page


	var $num_links			=  2; // Number of "digit" links to show before/after the currently viewed page


	var $cur_page			=  0; // The current page being viewed


	var $use_page_numbers	= FALSE; // Use page number for segment instead of offset


	var $first_link			= '&lsaquo; First';


	var $next_link			= '&gt;';


	var $prev_link			= '&lt;';


	var $last_link			= 'Last &rsaquo;';


	var $uri_segment		= 3;


	var $full_tag_open		= '';


	var $full_tag_close		= '';


	var $first_tag_open		= '';


	var $first_tag_close	= '&nbsp;';


	var $last_tag_open		= '&nbsp;';


	var $last_tag_close		= '';


	var $first_url			= ''; // Alternative URL for the First Page.


	var $cur_tag_open		= '&nbsp;<strong>';


	var $cur_tag_close		= '</strong>';


	var $next_tag_open		= '&nbsp;';


	var $next_tag_close		= '&nbsp;';


	var $prev_tag_open		= '&nbsp;';


	var $prev_tag_close		= '';


	var $num_tag_open		= '&nbsp;';


	var $num_tag_close		= '';


	var $page_query_string	= FALSE;


	var $query_string_segment = 'per_page';


	var $display_pages		= TRUE;


	var $anchor_class		= '';





	/**


	 * Constructor


	 *


	 * @access	public


	 * @param	array	initialization parameters


	 */


	public function __construct($params = array())


	{


		if (count($params) > 0)


		{


			$this->initialize($params);


		}





		if ($this->anchor_class != '')


		{


			$this->anchor_class = 'class="'.$this->anchor_class.'" ';


		}





		log_message('debug', "Pagination Class Initialized");


	}





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





	/**


	 * Initialize Preferences


	 *


	 * @access	public


	 * @param	array	initialization parameters


	 * @return	void


	 */


	function initialize($params = array())


	{


		if (count($params) > 0)


		{


			foreach ($params as $key => $val)


			{


				if (isset($this->$key))


				{


					$this->$key = $val;


				}


			}


		}


	}





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





	/**


	 * Generate the pagination links


	 *


	 * @access	public


	 * @return	string


	 */


	function create_links()


	{


		// If our item count or per-page total is zero there is no need to continue.


		if ($this->total_rows == 0 OR $this->per_page == 0)


		{


			return '';


		}





		// Calculate the total number of pages


		$num_pages = ceil($this->total_rows / $this->per_page);





		// Is there only one page? Hm... nothing more to do here then.


		if ($num_pages == 1)


		{


			return '';


		}





		// Set the base page index for starting page number


		if ($this->use_page_numbers)


		{


			$base_page = 1;


		}


		else


		{


			$base_page = 0;


		}





		// Determine the current page number.


		$CI =& get_instance();





		if ($CI->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE)


		{


			if ($CI->input->get($this->query_string_segment) != $base_page)


			{


				$this->cur_page = $CI->input->get($this->query_string_segment);





				// Prep the current page - no funny business!


				$this->cur_page = (int) $this->cur_page;


			}


		}


		else


		{


			if ($CI->uri->segment($this->uri_segment) != $base_page)


			{


				$this->cur_page = $CI->uri->segment($this->uri_segment);





				// Prep the current page - no funny business!


				$this->cur_page = (int) $this->cur_page;


			}


		}


		


		// Set current page to 1 if using page numbers instead of offset


		if ($this->use_page_numbers AND $this->cur_page == 0)


		{


			$this->cur_page = $base_page;


		}





		$this->num_links = (int)$this->num_links;





		if ($this->num_links < 1)


		{


			show_error('Your number of links must be a positive number.');


		}





		if ( ! is_numeric($this->cur_page))


		{


			$this->cur_page = $base_page;


		}





		// Is the page number beyond the result range?


		// If so we show the last page


		if ($this->use_page_numbers)


		{


			if ($this->cur_page > $num_pages)


			{


				$this->cur_page = $num_pages;


			}


		}


		else


		{


			if ($this->cur_page > $this->total_rows)


			{


				$this->cur_page = ($num_pages - 1) * $this->per_page;


			}


		}





		$uri_page_number = $this->cur_page;


		


		if ( ! $this->use_page_numbers)


		{


			$this->cur_page = floor(($this->cur_page/$this->per_page) + 1);


		}





		// Calculate the start and end numbers. These determine


		// which number to start and end the digit links with


		$start = (($this->cur_page - $this->num_links) > 0) ? $this->cur_page - ($this->num_links - 1) : 1;


		$end   = (($this->cur_page + $this->num_links) < $num_pages) ? $this->cur_page + $this->num_links : $num_pages;





		// Is pagination being used over GET or POST?  If get, add a per_page query


		// string. If post, add a trailing slash to the base URL if needed


		if ($CI->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE)


		{


			$this->base_url = rtrim($this->base_url).'&amp;'.$this->query_string_segment.'=';


		}


		else


		{


			$this->base_url = rtrim($this->base_url, '/') .'/';


		}





		// And here we go...


		$output = '';





		// Render the "First" link


		if  ($this->first_link !== FALSE AND $this->cur_page > ($this->num_links + 1))


		{


			$first_url = ($this->first_url == '') ? $this->base_url : $this->first_url;


			$output .= $this->first_tag_open.'<a '.$this->anchor_class.'href="'.$first_url.'">'.$this->first_link.'</a>'.$this->first_tag_close;


		}





		// Render the "previous" link


		if  ($this->prev_link !== FALSE AND $this->cur_page != 1)


		{


			if ($this->use_page_numbers)


			{


				$i = $uri_page_number - 1;


			}


			else


			{


				$i = $uri_page_number - $this->per_page;


			}





			if ($i == 0 && $this->first_url != '')


			{


				$output .= $this->prev_tag_open.'<a '.$this->anchor_class.'href="'.$this->first_url.'">'.$this->prev_link.'</a>'.$this->prev_tag_close;


			}


			else


			{


				$i = ($i == 0) ? '' : $this->prefix.$i.$this->suffix;


				$output .= $this->prev_tag_open.'<a '.$this->anchor_class.'href="'.$this->base_url.$i.'">'.$this->prev_link.'</a>'.$this->prev_tag_close;


			}





		}





		// Render the pages


		if ($this->display_pages !== FALSE)


		{


			// Write the digit links


			for ($loop = $start -1; $loop <= $end; $loop++)


			{


				if ($this->use_page_numbers)


				{


					$i = $loop;


				}


				else


				{


					$i = ($loop * $this->per_page) - $this->per_page;


				}





				if ($i >= $base_page)


				{


					if ($this->cur_page == $loop)


					{


						$output .= $this->cur_tag_open.$loop.$this->cur_tag_close; // Current page


					}


					else


					{


						$n = ($i == $base_page) ? '' : $i;





						if ($n == '' && $this->first_url != '')


						{


							$output .= $this->num_tag_open.'<a '.$this->anchor_class.'href="'.$this->first_url.'">'.$loop.'</a>'.$this->num_tag_close;


						}


						else


						{


							$n = ($n == '') ? '' : $this->prefix.$n.$this->suffix;





							$output .= $this->num_tag_open.'<a '.$this->anchor_class.'href="'.$this->base_url.$n.'">'.$loop.'</a>'.$this->num_tag_close;


						}


					}


				}


			}


		}





		// Render the "next" link


		if ($this->next_link !== FALSE AND $this->cur_page < $num_pages)


		{


			if ($this->use_page_numbers)


			{


				$i = $this->cur_page + 1;


			}


			else


			{


				$i = ($this->cur_page * $this->per_page);


			}





			$output .= $this->next_tag_open.'<a '.$this->anchor_class.'href="'.$this->base_url.$this->prefix.$i.$this->suffix.'">'.$this->next_link.'</a>'.$this->next_tag_close;


		}





		// Render the "Last" link


		if ($this->last_link !== FALSE AND ($this->cur_page + $this->num_links) < $num_pages)


		{


			if ($this->use_page_numbers)


			{


				$i = $num_pages;


			}


			else


			{


				$i = (($num_pages * $this->per_page) - $this->per_page);


			}


			$output .= $this->last_tag_open.'<a '.$this->anchor_class.'href="'.$this->base_url.$this->prefix.$i.$this->suffix.'">'.$this->last_link.'</a>'.$this->last_tag_close;


		}





		// Kill double slashes.  Note: Sometimes we can end up with a double slash


		// in the penultimate link so we'll kill all double slashes.


		$output = preg_replace("#([^:])//+#", "\\1/", $output);





		// Add the wrapper HTML if exists


		$output = $this->full_tag_open.$output.$this->full_tag_close;





		return $output;


	}


}


// END Pagination Class





/* End of file Pagination.php */


/* Location: ./system/libraries/Pagination.php */