system/libraries/Pagination.php - code-igniter-v3-giggi - Gitiles

 <?php
 /**
  * CodeIgniter
  *
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * This content is released under the MIT License (MIT)
  *
  * Copyright (c) 2014, British Columbia Institute of Technology
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  *
  * @package	CodeIgniter
  * @author	EllisLab Dev Team
  * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
  * @copyright	Copyright (c) 2014, British Columbia Institute of Technology (http://bcit.ca/)
  * @license	http://opensource.org/licenses/MIT	MIT License
  * @link	http://codeigniter.com
  * @since	Version 1.0.0
  * @filesource
  */
 defined('BASEPATH') OR exit('No direct script access allowed');

 /**
  * Pagination Class
  *
  * @package		CodeIgniter
  * @subpackage	Libraries
  * @category	Pagination
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/libraries/pagination.html
  */
 class CI_Pagination {

 	/**
 	 * Base URL
 	 *
 	 * The page that we're linking to
 	 *
 	 * @var	string
 	 */
 	protected $base_url		= '';

 	/**
 	 * Prefix
 	 *
 	 * @var	string
 	 */
 	protected $prefix = '';

 	/**
 	 * Suffix
 	 *
 	 * @var	string
 	 */
 	protected $suffix = '';

 	/**
 	 * Total number of items
 	 *
 	 * @var	int
 	 */
 	protected $total_rows = 0;

 	/**
 	 * Number of links to show
 	 *
 	 * Relates to "digit" type links shown before/after
 	 * the currently viewed page.
 	 *
 	 * @var	int
 	 */
 	protected $num_links = 2;

 	/**
 	 * Items per page
 	 *
 	 * @var	int
 	 */
 	public $per_page = 10;

 	/**
 	 * Current page
 	 *
 	 * @var	int
 	 */
 	public $cur_page = 0;

 	/**
 	 * Use page numbers flag
 	 *
 	 * Whether to use actual page numbers instead of an offset
 	 *
 	 * @var	bool
 	 */
 	protected $use_page_numbers = FALSE;

 	/**
 	 * First link
 	 *
 	 * @var	string
 	 */
 	protected $first_link = '&lsaquo; First';

 	/**
 	 * Next link
 	 *
 	 * @var	string
 	 */
 	protected $next_link = '&gt;';

 	/**
 	 * Previous link
 	 *
 	 * @var	string
 	 */
 	protected $prev_link = '&lt;';

 	/**
 	 * Last link
 	 *
 	 * @var	string
 	 */
 	protected $last_link = 'Last &rsaquo;';

 	/**
 	 * URI Segment
 	 *
 	 * @var	int
 	 */
 	protected $uri_segment = 0;

 	/**
 	 * Full tag open
 	 *
 	 * @var	string
 	 */
 	protected $full_tag_open = '';

 	/**
 	 * Full tag close
 	 *
 	 * @var	string
 	 */
 	protected $full_tag_close = '';

 	/**
 	 * First tag open
 	 *
 	 * @var	string
 	 */
 	protected $first_tag_open = '';

 	/**
 	 * First tag close
 	 *
 	 * @var	string
 	 */
 	protected $first_tag_close = '';

 	/**
 	 * Last tag open
 	 *
 	 * @var	string
 	 */
 	protected $last_tag_open = '';

 	/**
 	 * Last tag close
 	 *
 	 * @var	string
 	 */
 	protected $last_tag_close = '';

 	/**
 	 * First URL
 	 *
 	 * An alternative URL for the first page
 	 *
 	 * @var	string
 	 */
 	protected $first_url = '';

 	/**
 	 * Current tag open
 	 *
 	 * @var	string
 	 */
 	protected $cur_tag_open = '<strong>';

 	/**
 	 * Current tag close
 	 *
 	 * @var	string
 	 */
 	protected $cur_tag_close = '</strong>';

 	/**
 	 * Next tag open
 	 *
 	 * @var	string
 	 */
 	protected $next_tag_open = '';

 	/**
 	 * Next tag close
 	 *
 	 * @var	string
 	 */
 	protected $next_tag_close = '';

 	/**
 	 * Previous tag open
 	 *
 	 * @var	string
 	 */
 	protected $prev_tag_open = '';

 	/**
 	 * Previous tag close
 	 *
 	 * @var	string
 	 */
 	protected $prev_tag_close = '';

 	/**
 	 * Number tag open
 	 *
 	 * @var	string
 	 */
 	protected $num_tag_open = '';

 	/**
 	 * Number tag close
 	 *
 	 * @var	string
 	 */
 	protected $num_tag_close = '';

 	/**
 	 * Page query string flag
 	 *
 	 * @var	bool
 	 */
 	protected $page_query_string = FALSE;

 	/**
 	 * Query string segment
 	 *
 	 * @var	string
 	 */
 	protected $query_string_segment = 'per_page';

 	/**
 	 * Display pages flag
 	 *
 	 * @var	bool
 	 */
 	protected $display_pages = TRUE;

 	/**
 	 * Attributes
 	 *
 	 * @var	string
 	 */
 	protected $_attributes = '';

 	/**
 	 * Link types
 	 *
 	 * "rel" attribute
 	 *
 	 * @see	CI_Pagination::_attr_rel()
 	 * @var	array
 	 */
 	protected $_link_types = array();

 	/**
 	 * Reuse query string flag
 	 *
 	 * @var	bool
 	 */
 	protected $reuse_query_string = FALSE;

 	/**
 	 * Data page attribute
 	 *
 	 * @var	string
 	 */
 	protected $data_page_attr = 'data-ci-pagination-page';

 	/**
 	 * CI Singleton
 	 *
 	 * @var	object
 	 */
 	protected $CI;

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

 	/**
 	 * Constructor
 	 *
 	 * @param	array	$params	Initialization parameters
 	 * @return	void
 	 */
 	public function __construct($params = array())
 	{
 		$this->CI =& get_instance();
 		$this->CI->load->language('pagination');
 		foreach (array('first_link', 'next_link', 'prev_link', 'last_link') as $key)
 		{
 			if (($val = $this->CI->lang->line('pagination_'.$key)) !== FALSE)
 			{
 				$this->$key = $val;
 			}
 		}

 		$this->initialize($params);
 		log_message('debug', 'Pagination Class Initialized');
 	}

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

 	/**
 	 * Initialize Preferences
 	 *
 	 * @param	array	$params	Initialization parameters
 	 * @return	CI_Pagination
 	 */
 	public function initialize(array $params = array())
 	{
 		if (isset($params['attributes']) && is_array($params['attributes']))
 		{
 			$this->_parse_attributes($params['attributes']);
 			unset($params['attributes']);
 		}

 		// Deprecated legacy support for the anchor_class option
 		// Should be removed in CI 3.1+
 		if (isset($params['anchor_class']))
 		{
 			empty($params['anchor_class']) OR $attributes['class'] = $params['anchor_class'];
 			unset($params['anchor_class']);
 		}

 		foreach ($params as $key => $val)
 		{
 			if (property_exists($this, $key))
 			{
 				$this->$key = $val;
 			}
 		}

 		if ($this->CI->config->item('enable_query_strings') === TRUE)
 		{
 			$this->page_query_string = TRUE;
 		}

 		return $this;
 	}

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

 	/**
 	 * Generate the pagination links
 	 *
 	 * @return	string
 	 */
 	public function create_links()
 	{
 		// If our item count or per-page total is zero there is no need to continue.
 		// Note: DO NOT change the operator to === here!
 		if ($this->total_rows == 0 OR $this->per_page == 0)
 		{
 			return '';
 		}

 		// Calculate the total number of pages
 		$num_pages = (int) ceil($this->total_rows / $this->per_page);

 		// Is there only one page? Hm... nothing more to do here then.
 		if ($num_pages === 1)
 		{
 			return '';
 		}

 		// Check the user defined number of links.
 		$this->num_links = (int) $this->num_links;

 		if ($this->num_links < 0)
 		{
 			show_error('Your number of links must be a non-negative number.');
 		}

 		// Keep any existing query string items.
 		// Note: Has nothing to do with any other query string option.
 		if ($this->reuse_query_string === TRUE)
 		{
 			$get = $this->CI->input->get();

 			// Unset the controll, method, old-school routing options
 			unset($get['c'], $get['m'], $get[$this->query_string_segment]);
 		}
 		else
 		{
 			$get = array();
 		}

 		// Put together our base and first URLs.
 		// Note: DO NOT append to the properties as that would break successive calls
 		$base_url = trim($this->base_url);
 		$first_url = $this->first_url;

 		$query_string = '';
 		$query_string_sep = (strpos($base_url, '?') === FALSE) ? '?' : '&amp;';

 		// Are we using query strings?
 		if ($this->page_query_string === TRUE)
 		{
 			// If a custom first_url hasn't been specified, we'll create one from
 			// the base_url, but without the page item.
 			if ($first_url === '')
 			{
 				$first_url = $base_url;

 				// If we saved any GET items earlier, make sure they're appended.
 				if ( ! empty($get))
 				{
 					$first_url .= $query_string_sep.http_build_query($get);
 				}
 			}

 			// Add the page segment to the end of the query string, where the
 			// page number will be appended.
 			$base_url .= $query_string_sep.http_build_query(array_merge($get, array($this->query_string_segment => '')));
 		}
 		else
 		{
 			// Standard segment mode.
 			// Generate our saved query string to append later after the page number.
 			if ( ! empty($get))
 			{
 				$query_string = $query_string_sep.http_build_query($get);
 				$this->suffix .= $query_string;
 			}

 			// Does the base_url have the query string in it?
 			// If we're supposed to save it, remove it so we can append it later.
 			if ($this->reuse_query_string === TRUE && ($base_query_pos = strpos($base_url, '?')) !== FALSE)
 			{
 				$base_url = substr($base_url, 0, $base_query_pos);
 			}

 			if ($first_url === '')
 			{
 				$first_url = $base_url.$query_string;
 			}

 			$base_url = rtrim($base_url, '/').'/';
 		}

 		// Determine the current page number.
 		$base_page = ($this->use_page_numbers) ? 1 : 0;

 		// Are we using query strings?
 		if ($this->page_query_string === TRUE)
 		{
 			$this->cur_page = $this->CI->input->get($this->query_string_segment);
 		}
 		else
 		{
 			// Default to the last segment number if one hasn't been defined.
 			if ($this->uri_segment === 0)
 			{
 				$this->uri_segment = count($this->CI->uri->segment_array());
 			}

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

 			// Remove any specified prefix/suffix from the segment.
 			if ($this->prefix !== '' OR $this->suffix !== '')
 			{
 				$this->cur_page = str_replace(array($this->prefix, $this->suffix), '', $this->cur_page);
 			}
 		}

 		// If something isn't quite right, back to the default base page.
 		if ( ! ctype_digit($this->cur_page) OR ($this->use_page_numbers && (int) $this->cur_page === 0))
 		{
 			$this->cur_page = $base_page;
 		}
 		else
 		{
 			// Make sure we're using integers for comparisons later.
 			$this->cur_page = (int) $this->cur_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 = $num_pages;
 			}
 		}
 		elseif ($this->cur_page > $this->total_rows)
 		{
 			$this->cur_page = ($num_pages - 1) * $this->per_page;
 		}

 		$uri_page_number = $this->cur_page;

 		// If we're using offset instead of page numbers, convert it
 		// to a page number, so we can generate the surrounding number links.
 		if ( ! $this->use_page_numbers)
 		{
 			$this->cur_page = (int) floor(($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;

 		// And here we go...
 		$output = '';

 		// Render the "First" link.
 		if ($this->first_link !== FALSE && $this->cur_page > ($this->num_links + 1 + ! $this->num_links))
 		{
 			// Take the general parameters, and squeeze this pagination-page attr in for JS frameworks.
 			$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, 1);

 			$output .= $this->first_tag_open.'<a href="'.$first_url.'"'.$attributes.$this->_attr_rel('start').'>'
 				.$this->first_link.'</a>'.$this->first_tag_close;
 		}

 		// Render the "Previous" link.
 		if ($this->prev_link !== FALSE && $this->cur_page !== 1)
 		{
 			$i = ($this->use_page_numbers) ? $uri_page_number - 1 : $uri_page_number - $this->per_page;

 			$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);

 			if ($i === $base_page)
 			{
 				// First page
 				$output .= $this->prev_tag_open.'<a href="'.$first_url.'"'.$attributes.$this->_attr_rel('prev').'>'
 					.$this->prev_link.'</a>'.$this->prev_tag_close;
 			}
 			else
 			{
 				$append = $this->prefix.$i.$this->suffix;
 				$output .= $this->prev_tag_open.'<a href="'.$base_url.$append.'"'.$attributes.$this->_attr_rel('prev').'>'
 					.$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++)
 			{
 				$i = ($this->use_page_numbers) ? $loop : ($loop * $this->per_page) - $this->per_page;

 				$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);

 				if ($i >= $base_page)
 				{
 					if ($this->cur_page === $loop)
 					{
 						// Current page
 						$output .= $this->cur_tag_open.$loop.$this->cur_tag_close;
 					}
 					elseif ($i === $base_page)
 					{
 						// First page
 						$output .= $this->num_tag_open.'<a href="'.$first_url.'"'.$attributes.$this->_attr_rel('start').'>'
 							.$loop.'</a>'.$this->num_tag_close;
 					}
 					else
 					{
 						$append = $this->prefix.$i.$this->suffix;
 						$output .= $this->num_tag_open.'<a href="'.$base_url.$append.'"'.$attributes.$this->_attr_rel('start').'>'
 							.$loop.'</a>'.$this->num_tag_close;
 					}
 				}
 			}
 		}

 		// Render the "next" link
 		if ($this->next_link !== FALSE && $this->cur_page < $num_pages)
 		{
 			$i = ($this->use_page_numbers) ? $this->cur_page + 1 : $this->cur_page * $this->per_page;

 			$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);

 			$output .= $this->next_tag_open.'<a href="'.$base_url.$this->prefix.$i.$this->suffix.'"'.$attributes
 				.$this->_attr_rel('next').'>'.$this->next_link.'</a>'.$this->next_tag_close;
 		}

 		// Render the "Last" link
 		if ($this->last_link !== FALSE && ($this->cur_page + $this->num_links + ! $this->num_links) < $num_pages)
 		{
 			$i = ($this->use_page_numbers) ? $num_pages : ($num_pages * $this->per_page) - $this->per_page;

 			$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);

 			$output .= $this->last_tag_open.'<a href="'.$base_url.$this->prefix.$i.$this->suffix.'"'.$attributes.'>'
 				.$this->last_link.'</a>'.$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
 		return $this->full_tag_open.$output.$this->full_tag_close;
 	}

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

 	/**
 	 * Parse attributes
 	 *
 	 * @param	array	$attributes
 	 * @return	void
 	 */
 	protected function _parse_attributes($attributes)
 	{
 		isset($attributes['rel']) OR $attributes['rel'] = TRUE;
 		$this->_link_types = ($attributes['rel'])
 			? array('start' => 'start', 'prev' => 'prev', 'next' => 'next')
 			: array();
 		unset($attributes['rel']);

 		$this->_attributes = '';
 		foreach ($attributes as $key => $value)
 		{
 			$this->_attributes .= ' '.$key.'="'.$value.'"';
 		}
 	}

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

 	/**
 	 * Add "rel" attribute
 	 *
 	 * @link	http://www.w3.org/TR/html5/links.html#linkTypes
 	 * @param	string	$type
 	 * @return	string
 	 */
 	protected function _attr_rel($type)
 	{
 		if (isset($this->_link_types[$type]))
 		{
 			unset($this->_link_types[$type]);
 			return ' rel="'.$type.'"';
 		}

 		return '';
 	}

 }

 /* End of file Pagination.php */
 /* Location: ./system/libraries/Pagination.php */
	<?php
	/**
	* CodeIgniter
	*
	* An open source application development framework for PHP 5.2.4 or newer
	*
	* This content is released under the MIT License (MIT)
	*
	* Copyright (c) 2014, British Columbia Institute of Technology
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is
	* furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	* THE SOFTWARE.
	*
	* @package CodeIgniter
	* @author EllisLab Dev Team
	* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
	* @copyright Copyright (c) 2014, British Columbia Institute of Technology (http://bcit.ca/)
	* @license http://opensource.org/licenses/MIT MIT License
	* @link http://codeigniter.com
	* @since Version 1.0.0
	* @filesource
	*/
	defined('BASEPATH') OR exit('No direct script access allowed');

	/**
	* Pagination Class
	*
	* @package CodeIgniter
	* @subpackage Libraries
	* @category Pagination
	* @author EllisLab Dev Team
	* @link http://codeigniter.com/user_guide/libraries/pagination.html
	*/
	class CI_Pagination {

	/**
	* Base URL
	*
	* The page that we're linking to
	*
	* @var string
	*/
	protected $base_url = '';

	/**
	* Prefix
	*
	* @var string
	*/
	protected $prefix = '';

	/**
	* Suffix
	*
	* @var string
	*/
	protected $suffix = '';

	/**
	* Total number of items
	*
	* @var int
	*/
	protected $total_rows = 0;

	/**
	* Number of links to show
	*
	* Relates to "digit" type links shown before/after
	* the currently viewed page.
	*
	* @var int
	*/
	protected $num_links = 2;

	/**
	* Items per page
	*
	* @var int
	*/
	public $per_page = 10;

	/**
	* Current page
	*
	* @var int
	*/
	public $cur_page = 0;

	/**
	* Use page numbers flag
	*
	* Whether to use actual page numbers instead of an offset
	*
	* @var bool
	*/
	protected $use_page_numbers = FALSE;

	/**
	* First link
	*
	* @var string
	*/
	protected $first_link = '&lsaquo; First';

	/**
	* Next link
	*
	* @var string
	*/
	protected $next_link = '>';

	/**
	* Previous link
	*
	* @var string
	*/
	protected $prev_link = '<';

	/**
	* Last link
	*
	* @var string
	*/
	protected $last_link = 'Last &rsaquo;';

	/**
	* URI Segment
	*
	* @var int
	*/
	protected $uri_segment = 0;

	/**
	* Full tag open
	*
	* @var string
	*/
	protected $full_tag_open = '';

	/**
	* Full tag close
	*
	* @var string
	*/
	protected $full_tag_close = '';

	/**
	* First tag open
	*
	* @var string
	*/
	protected $first_tag_open = '';

	/**
	* First tag close
	*
	* @var string
	*/
	protected $first_tag_close = '';

	/**
	* Last tag open
	*
	* @var string
	*/
	protected $last_tag_open = '';

	/**
	* Last tag close
	*
	* @var string
	*/
	protected $last_tag_close = '';

	/**
	* First URL
	*
	* An alternative URL for the first page
	*
	* @var string
	*/
	protected $first_url = '';

	/**
	* Current tag open
	*
	* @var string
	*/
	protected $cur_tag_open = '<strong>';

	/**
	* Current tag close
	*
	* @var string
	*/
	protected $cur_tag_close = '</strong>';

	/**
	* Next tag open
	*
	* @var string
	*/
	protected $next_tag_open = '';

	/**
	* Next tag close
	*
	* @var string
	*/
	protected $next_tag_close = '';

	/**
	* Previous tag open
	*
	* @var string
	*/
	protected $prev_tag_open = '';

	/**
	* Previous tag close
	*
	* @var string
	*/
	protected $prev_tag_close = '';

	/**
	* Number tag open
	*
	* @var string
	*/
	protected $num_tag_open = '';

	/**
	* Number tag close
	*
	* @var string
	*/
	protected $num_tag_close = '';

	/**
	* Page query string flag
	*
	* @var bool
	*/
	protected $page_query_string = FALSE;

	/**
	* Query string segment
	*
	* @var string
	*/
	protected $query_string_segment = 'per_page';

	/**
	* Display pages flag
	*
	* @var bool
	*/
	protected $display_pages = TRUE;

	/**
	* Attributes
	*
	* @var string
	*/
	protected $_attributes = '';

	/**
	* Link types
	*
	* "rel" attribute
	*
	* @see CI_Pagination::_attr_rel()
	* @var array
	*/
	protected $_link_types = array();

	/**
	* Reuse query string flag
	*
	* @var bool
	*/
	protected $reuse_query_string = FALSE;

	/**
	* Data page attribute
	*
	* @var string
	*/
	protected $data_page_attr = 'data-ci-pagination-page';

	/**
	* CI Singleton
	*
	* @var object
	*/
	protected $CI;

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

	/**
	* Constructor
	*
	* @param array $params Initialization parameters
	* @return void
	*/
	public function __construct($params = array())
	{
	$this->CI =& get_instance();
	$this->CI->load->language('pagination');
	foreach (array('first_link', 'next_link', 'prev_link', 'last_link') as $key)
	{
	if (($val = $this->CI->lang->line('pagination_'.$key)) !== FALSE)
	{
	$this->$key = $val;
	}
	}

	$this->initialize($params);
	log_message('debug', 'Pagination Class Initialized');
	}

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

	/**
	* Initialize Preferences
	*
	* @param array $params Initialization parameters
	* @return CI_Pagination
	*/
	public function initialize(array $params = array())
	{
	if (isset($params['attributes']) && is_array($params['attributes']))
	{
	$this->_parse_attributes($params['attributes']);
	unset($params['attributes']);
	}

	// Deprecated legacy support for the anchor_class option
	// Should be removed in CI 3.1+
	if (isset($params['anchor_class']))
	{
	empty($params['anchor_class']) OR $attributes['class'] = $params['anchor_class'];
	unset($params['anchor_class']);
	}

	foreach ($params as $key => $val)
	{
	if (property_exists($this, $key))
	{
	$this->$key = $val;
	}
	}

	if ($this->CI->config->item('enable_query_strings') === TRUE)
	{
	$this->page_query_string = TRUE;
	}

	return $this;
	}

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

	/**
	* Generate the pagination links
	*
	* @return string
	*/
	public function create_links()
	{
	// If our item count or per-page total is zero there is no need to continue.
	// Note: DO NOT change the operator to === here!
	if ($this->total_rows == 0 OR $this->per_page == 0)
	{
	return '';
	}

	// Calculate the total number of pages
	$num_pages = (int) ceil($this->total_rows / $this->per_page);

	// Is there only one page? Hm... nothing more to do here then.
	if ($num_pages === 1)
	{
	return '';
	}

	// Check the user defined number of links.
	$this->num_links = (int) $this->num_links;

	if ($this->num_links < 0)
	{
	show_error('Your number of links must be a non-negative number.');
	}

	// Keep any existing query string items.
	// Note: Has nothing to do with any other query string option.
	if ($this->reuse_query_string === TRUE)
	{
	$get = $this->CI->input->get();

	// Unset the controll, method, old-school routing options
	unset($get['c'], $get['m'], $get[$this->query_string_segment]);
	}
	else
	{
	$get = array();
	}

	// Put together our base and first URLs.
	// Note: DO NOT append to the properties as that would break successive calls
	$base_url = trim($this->base_url);
	$first_url = $this->first_url;

	$query_string = '';
	$query_string_sep = (strpos($base_url, '?') === FALSE) ? '?' : '&';

	// Are we using query strings?
	if ($this->page_query_string === TRUE)
	{
	// If a custom first_url hasn't been specified, we'll create one from
	// the base_url, but without the page item.
	if ($first_url === '')
	{
	$first_url = $base_url;

	// If we saved any GET items earlier, make sure they're appended.
	if ( ! empty($get))
	{
	$first_url .= $query_string_sep.http_build_query($get);
	}
	}

	// Add the page segment to the end of the query string, where the
	// page number will be appended.
	$base_url .= $query_string_sep.http_build_query(array_merge($get, array($this->query_string_segment => '')));
	}
	else
	{
	// Standard segment mode.
	// Generate our saved query string to append later after the page number.
	if ( ! empty($get))
	{
	$query_string = $query_string_sep.http_build_query($get);
	$this->suffix .= $query_string;
	}

	// Does the base_url have the query string in it?
	// If we're supposed to save it, remove it so we can append it later.
	if ($this->reuse_query_string === TRUE && ($base_query_pos = strpos($base_url, '?')) !== FALSE)
	{
	$base_url = substr($base_url, 0, $base_query_pos);
	}

	if ($first_url === '')
	{
	$first_url = $base_url.$query_string;
	}

	$base_url = rtrim($base_url, '/').'/';
	}

	// Determine the current page number.
	$base_page = ($this->use_page_numbers) ? 1 : 0;

	// Are we using query strings?
	if ($this->page_query_string === TRUE)
	{
	$this->cur_page = $this->CI->input->get($this->query_string_segment);
	}
	else
	{
	// Default to the last segment number if one hasn't been defined.
	if ($this->uri_segment === 0)
	{
	$this->uri_segment = count($this->CI->uri->segment_array());
	}

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

	// Remove any specified prefix/suffix from the segment.
	if ($this->prefix !== '' OR $this->suffix !== '')
	{
	$this->cur_page = str_replace(array($this->prefix, $this->suffix), '', $this->cur_page);
	}
	}

	// If something isn't quite right, back to the default base page.
	if ( ! ctype_digit($this->cur_page) OR ($this->use_page_numbers && (int) $this->cur_page === 0))
	{
	$this->cur_page = $base_page;
	}
	else
	{
	// Make sure we're using integers for comparisons later.
	$this->cur_page = (int) $this->cur_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 = $num_pages;
	}
	}
	elseif ($this->cur_page > $this->total_rows)
	{
	$this->cur_page = ($num_pages - 1) * $this->per_page;
	}

	$uri_page_number = $this->cur_page;

	// If we're using offset instead of page numbers, convert it
	// to a page number, so we can generate the surrounding number links.
	if ( ! $this->use_page_numbers)
	{
	$this->cur_page = (int) floor(($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;

	// And here we go...
	$output = '';

	// Render the "First" link.
	if ($this->first_link !== FALSE && $this->cur_page > ($this->num_links + 1 + ! $this->num_links))
	{
	// Take the general parameters, and squeeze this pagination-page attr in for JS frameworks.
	$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, 1);

	$output .= $this->first_tag_open.'<a href="'.$first_url.'"'.$attributes.$this->_attr_rel('start').'>'
	.$this->first_link.'</a>'.$this->first_tag_close;
	}

	// Render the "Previous" link.
	if ($this->prev_link !== FALSE && $this->cur_page !== 1)
	{
	$i = ($this->use_page_numbers) ? $uri_page_number - 1 : $uri_page_number - $this->per_page;

	$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);

	if ($i === $base_page)
	{
	// First page
	$output .= $this->prev_tag_open.'<a href="'.$first_url.'"'.$attributes.$this->_attr_rel('prev').'>'
	.$this->prev_link.'</a>'.$this->prev_tag_close;
	}
	else
	{
	$append = $this->prefix.$i.$this->suffix;
	$output .= $this->prev_tag_open.'<a href="'.$base_url.$append.'"'.$attributes.$this->_attr_rel('prev').'>'
	.$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++)
	{
	$i = ($this->use_page_numbers) ? $loop : ($loop * $this->per_page) - $this->per_page;

	$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);

	if ($i >= $base_page)
	{
	if ($this->cur_page === $loop)
	{
	// Current page
	$output .= $this->cur_tag_open.$loop.$this->cur_tag_close;
	}
	elseif ($i === $base_page)
	{
	// First page
	$output .= $this->num_tag_open.'<a href="'.$first_url.'"'.$attributes.$this->_attr_rel('start').'>'
	.$loop.'</a>'.$this->num_tag_close;
	}
	else
	{
	$append = $this->prefix.$i.$this->suffix;
	$output .= $this->num_tag_open.'<a href="'.$base_url.$append.'"'.$attributes.$this->_attr_rel('start').'>'
	.$loop.'</a>'.$this->num_tag_close;
	}
	}
	}
	}

	// Render the "next" link
	if ($this->next_link !== FALSE && $this->cur_page < $num_pages)
	{
	$i = ($this->use_page_numbers) ? $this->cur_page + 1 : $this->cur_page * $this->per_page;

	$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);

	$output .= $this->next_tag_open.'<a href="'.$base_url.$this->prefix.$i.$this->suffix.'"'.$attributes
	.$this->_attr_rel('next').'>'.$this->next_link.'</a>'.$this->next_tag_close;
	}

	// Render the "Last" link
	if ($this->last_link !== FALSE && ($this->cur_page + $this->num_links + ! $this->num_links) < $num_pages)
	{
	$i = ($this->use_page_numbers) ? $num_pages : ($num_pages * $this->per_page) - $this->per_page;

	$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);

	$output .= $this->last_tag_open.'<a href="'.$base_url.$this->prefix.$i.$this->suffix.'"'.$attributes.'>'
	.$this->last_link.'</a>'.$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
	return $this->full_tag_open.$output.$this->full_tag_close;
	}

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

	/**
	* Parse attributes
	*
	* @param array $attributes
	* @return void
	*/
	protected function _parse_attributes($attributes)
	{
	isset($attributes['rel']) OR $attributes['rel'] = TRUE;
	$this->_link_types = ($attributes['rel'])
	? array('start' => 'start', 'prev' => 'prev', 'next' => 'next')
	: array();
	unset($attributes['rel']);

	$this->_attributes = '';
	foreach ($attributes as $key => $value)
	{
	$this->_attributes .= ' '.$key.'="'.$value.'"';
	}
	}

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

	/**
	* Add "rel" attribute
	*
	* @link http://www.w3.org/TR/html5/links.html#linkTypes
	* @param string $type
	* @return string
	*/
	protected function _attr_rel($type)
	{
	if (isset($this->_link_types[$type]))
	{
	unset($this->_link_types[$type]);
	return ' rel="'.$type.'"';
	}

	return '';
	}

	}

	/* End of file Pagination.php */
	/* Location: ./system/libraries/Pagination.php */