<?php

/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 4.3.2 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2008, EllisLab, Inc.
 * @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		ExpressionEngine Dev Team
 * @link		http://codeigniter.com/user_guide/libraries/pagination.html
 */
class CI_Pagination {

    var $base_url = ''; // The page we are linking to
    var $total_rows = ''; // 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 $first_link = '&lt;&lt;';
    var $next_link = '&gt;';
    var $prev_link = '&lt;';
    var $last_link = '&gt;&gt;';
    var $uri_segment = 3;
    var $full_tag_open = '';
    var $full_tag_close = '';
    var $first_tag_open = '';
    var $first_tag_close = ' ... ';
    var $last_tag_open = ' ... ';
    var $last_tag_close = '';
    var $cur_tag_open = ' <strong>';
    var $cur_tag_close = '</strong>';
    var $next_tag_open = ' ';
    var $next_tag_close = ' ';
    var $prev_tag_open = ' ';
    var $prev_tag_close = '';
    var $num_tag_open = ' ';
    var $num_tag_close = ',';
    var $page_query_string = FALSE;
    var $query_string_segment = 'start';

    /**
     * Constructor
     *
     * @access	public
     * @param	array	initialization parameters
     */
    function CI_Pagination($params = array()) {
        if (count($params) > 0) {
            $this->initialize($params);
        }

        #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() {
        $start = $_GET['start'];
        $start = is_numeric($_GET['page']) ? $_GET['page'] * $this->per_page - 1 : $start;
        // If our item count or per-page total is zero there is no need to continue.
        if ($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 '';
        }

        $this->cur_page = $start;

        // Prep the current page - no funny business!
        $this->cur_page = (int) $this->cur_page;


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

        if ($this->num_links < 1) {
            a_error('Your number of links must be a positive number.');
        }

        if (!is_numeric($this->cur_page)) {
            $this->cur_page = 0;
        }

        // Is the page number beyond the result range?
        // If so we show the last page
        if ($this->cur_page > $this->total_rows) {
            $this->cur_page = ($num_pages - 1) * $this->per_page;
        }

        $uri_page_number = $this->cur_page;
        $this->cur_page = floor(($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;

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

        // Render the "First" link
        if (!empty($this->first_link)) {
            if ($this->cur_page > ($this->num_links + 1)) {
                $output .= $this->first_tag_open . '<a href="' . $this->base_url . '">1</a>' . $this->first_tag_close;
            }
            #else $output .= $this->first_tag_open . $this->first_link . $this->first_tag_close;;
        }

        /* / Render the "previous" link
          if(!empty($this->prev_link)) {
          if  ($this->cur_page != 1)
          {
          $i = $uri_page_number - $this->per_page;
          if ($i == 0) $i = '';
          $output .= $this->prev_tag_open.'<a href="'.$this->base_url.$i.'">'.$this->prev_link.'</a>'.$this->prev_tag_close;
          }
          else $output .= $this->prev_tag_open . $this->prev_link . $this->prev_tag_close;
          }
         */

        // Write the digit links
        for ($loop = $start - 1; $loop <= $end; $loop++) {
            $i = ($loop * $this->per_page) - $this->per_page;

            if ($i >= 0) {
                if ($this->cur_page == $loop) {
                    $output .= $this->cur_tag_open . $loop . $this->cur_tag_close . ($loop != $num_pages ? ',' : ''); // Current page
                } else {
                    $n = ($i == 0) ? '' : $i;
                    $output .= $this->num_tag_open . '<a href="' . $this->base_url . $n . '">' . $loop . '</a>' . ($loop != $num_pages ? $this->num_tag_close : '');
                }
            }
        }

        /* / Render the "next" link
          if(!empty($this->next_link)) {
          if ($this->cur_page < $num_pages)
          {
          $output .= $this->next_tag_open.'<a href="'.$this->base_url.($this->cur_page * $this->per_page).'">'.$this->next_link.'</a>'.$this->next_tag_close;
          }
          else $output .= $this->next_tag_open . $this->next_link . $this->next_tag_close;
          }
         */

        // Render the "Last" link
        if (!empty($this->last_link)) {
            if (($this->cur_page + $this->num_links) < $num_pages) {
                $i = (($num_pages * $this->per_page) - $this->per_page);
                $output .= $this->last_tag_open . '<a href="' . $this->base_url . $i . '">' . $num_pages . '</a>' . $this->last_tag_close;
            }
            #else $output .= $this->last_tag_open . $this->last_link . $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 */