Bootstrap Friendly FuelPHP Pagination

<?php
/**
 * Part of the Fuel framework.
 *
 * @package     Fuel
 * @version     1.0
 * @author      Dan Horrigan <http://dhorrigan.com>
 * @license     MIT License
 * @copyright   2010 - 2011 Fuel Development Team
 */

namespace Fuel\Core;



class Pagination
{

    /**
     * @var integer The current page
     */
    public static $current_page = null;

    /**
     * @var integer The offset that the current page starts at
     */
    public static $offset = 0;

    /**
     * @var integer The number of items per page
     */
    public static $per_page = 10;

    /**
     * @var integer The number of total pages
     */
    public static $total_pages = 0;

    /**
     * @var array The HTML for the display
     */
    public static $template = array(
        'wrapper_start'  => '<div class="pagination"><ul> ',
        'wrapper_end'    => ' </ul></div>',
        'page_start'     => '<span class="page-links"> ',
        'page_end'       => ' </span>',
        'previous_start' => '<li class="prev"> ',
        'prevdisabled_start' => '<li class="prev disabled"> ',
        'previous_end'   => ' </li>',
        'previous_mark'  => '&laquo; ',
        'pagelinks_start' => '<li>',
        'pagelinks_end' => '</li>',
        'next_start'     => '<li class="next"> ',
        'nextdisabled_start' => '<li class="next disabled"> ',
        'next_end'       => ' </li>',
        'next_mark'      => ' &raquo;',
        'active_start'   => '<li class="active"> ',
        'active_end'     => ' </li>',
    );

    /**
     * @var integer The total number of items
     */
    protected static $total_items = 0;

    /**
     * @var integer The total number of links to show
     */
    protected static $num_links = 5;

    /**
     * @var integer The URI segment containg page number
     */
    protected static $uri_segment = 3;

    /**
     * @var mixed   The pagination URL
     */
    protected static $pagination_url;

    /**
     * Init
     *
     * Loads in the config and sets the variables
     *
     * @access  public
     * @return  void
     */
    public static function _init()
    {
        $config = \Config::get('pagination', array());

        static::set_config($config);
    }

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

    /**
     * Set Config
     *
     * Sets the configuration for pagination
     *
     * @access public
     * @param array   $config The configuration array
     * @return void
     */
    public static function set_config(array $config)
    {

        foreach ($config as $key => $value)
        {
            if ($key == 'template')
            {
                static::$template = array_merge(static::$template, $config['template']);
                continue;
            }

            static::${$key} = $value;
        }

        static::initialize();
    }

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

    /**
     * Prepares vars for creating links
     *
     * @access public
     * @return array    The pagination variables
     */
    protected static function initialize()
    {
        static::$total_pages = ceil(static::$total_items / static::$per_page) ?: 1;

        static::$current_page = (int) \URI::segment(static::$uri_segment);

        if (static::$current_page > static::$total_pages)
        {
            static::$current_page = static::$total_pages;
        }
        elseif (static::$current_page < 1)
        {
            static::$current_page = 1;
        }

        // The current page must be zero based so that the offset for page 1 is 0.
        static::$offset = (static::$current_page - 1) * static::$per_page;
    }

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

    /**
     * Creates the pagination links
     *
     * @access public
     * @return mixed    The pagination links
     */
    public static function create_links()
    {
        if (static::$total_pages == 1)
        {
            return '';
        }

        \Lang::load('pagination', true);

        $pagination  = static::$template['wrapper_start'];
        $pagination .= static::prev_link(\Lang::get('pagination.previous'));
        $pagination .= static::page_links();
        $pagination .= static::next_link(\Lang::get('pagination.next'));
        $pagination .= static::$template['wrapper_end'];

        return $pagination;
    }

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

    /**
     * Pagination Page Number links
     *
     * @access public
     * @return mixed    Markup for page number links
     */
    public static function page_links()
    {
        if (static::$total_pages == 1)
        {
            return '';
        }

        $pagination = '';

        // Let's get the starting page number, this is determined using num_links
        $start = ((static::$current_page - static::$num_links) > 0) ? static::$current_page - (static::$num_links - 1) : 1;

        // Let's get the ending page number
        $end   = ((static::$current_page + static::$num_links) < static::$total_pages) ? static::$current_page + static::$num_links : static::$total_pages;

        for($i = $start; $i <= $end; $i++)
        {
            if (static::$current_page == $i)
            {
                $url = ($i == 1) ? '' : '/'.$i;
                $pagination .= static::$template['active_start'].\Html::anchor(rtrim(static::$pagination_url, '/').$url, $i).static::$template['active_end'];
            }
            else
            {
                $url = ($i == 1) ? '' : '/'.$i;
                $pagination .= static::$template['pagelinks_start'].\Html::anchor(rtrim(static::$pagination_url, '/').$url, $i).static::$template['pagelinks_end'];
            }
        }

        return $pagination;
    }

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

    /**
     * Pagination "Next" link
     *
     * @access public
     * @param string $value The text displayed in link
     * @return mixed    The next link
     */
    public static function next_link($value)
    {
        if (static::$total_pages == 1)
        {
            return '';
        }

        if (static::$current_page == static::$total_pages)
        {
            return static::$template['nextdisabled_start'].\Html::anchor(rtrim('#'),$value.static::$template['next_mark']).static::$template['next_end'];
        }
        else
        {
            $next_page = static::$current_page + 1;
            return static::$template['next_start'].\Html::anchor(rtrim(static::$pagination_url, '/').'/'.$next_page, $value.static::$template['next_mark']).static::$template['next_end'];
        }
    }

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

    /**
     * Pagination "Previous" link
     *
     * @access public
     * @param string $value The text displayed in link
     * @return mixed    The previous link
     */
    public static function prev_link($value)
    {
        if (static::$total_pages == 1)
        {
            return '';
        }

        if (static::$current_page == 1)
        {
            return static::$template['prevdisabled_start'].\Html::anchor(rtrim('#'),$value.static::$template['previous_mark']).static::$template['previous_end'];
        }
        else
        {
            $previous_page = static::$current_page - 1;
            $previous_page = ($previous_page == 1) ? '' : '/'.$previous_page;
            return static::$template['previous_start'].\Html::anchor(rtrim(static::$pagination_url, '/').$previous_page, static::$template['previous_mark'].$value).static::$template['previous_end'];
        }
    }
}