<?php

class Paginator{
	var $urlparam;
    var $items_per_page;
    var $items_total;
    var $current_page;
    var $num_pages;
    var $mid_range;
    var $low;
    var $high;
    var $limit;
    var $return;
    var $default_ipp = 15;

    function Paginator()
    {
        $this->current_page = 1;
        $this->mid_range = 7;
        $this->items_per_page = (!empty($_GET['ipp'])) ? $_GET['ipp']:$this->default_ipp;
    }

    function paginate()
    {
        if($_GET['ipp'] == 'All')
        {
            $this->num_pages = ceil($this->items_total/$this->default_ipp);
            $this->items_per_page = $this->default_ipp;
        }
        else
        {
            if(!is_numeric($this->items_per_page) OR $this->items_per_page <= 0) $this->items_per_page = $this->default_ipp;
            $this->num_pages = ceil($this->items_total/$this->items_per_page);
        }
        $this->current_page = (int) $_GET['page']; // must be numeric > 0
        if($this->current_page < 1 Or !is_numeric($this->current_page)) $this->current_page = 1;
        if($this->current_page > $this->num_pages) $this->current_page = $this->num_pages;
        $prev_page = $this->current_page-1;
        $next_page = $this->current_page+1;

        if($this->num_pages > 10)
        {
            $this->return = ($this->current_page != 1 And $this->items_total >= 10) ? "<a class=\"paginate\" href=\"$_SERVER[PHP_SELF]".$this->urlparam."&page=$prev_page&ipp=$this->items_per_page\">Ç Previous</a> ":"<span class=\"inactive\" href=\"#\">Ç Previous</span> ";

            $this->start_range = $this->current_page - floor($this->mid_range/2);
            $this->end_range = $this->current_page + floor($this->mid_range/2);

            if($this->start_range <= 0)
            {
                $this->end_range += abs($this->start_range)+1;
                $this->start_range = 1;
            }
            if($this->end_range > $this->num_pages)
            {
                $this->start_range -= $this->end_range-$this->num_pages;
                $this->end_range = $this->num_pages;
            }
            $this->range = range($this->start_range,$this->end_range);

            for($i=1;$i<=$this->num_pages;$i++)
            {
                if($this->range[0] > 2 And $i == $this->range[0]) $this->return .= " ... ";
                // loop through all pages. if first, last, or in range, display
                if($i==1 Or $i==$this->num_pages Or in_array($i,$this->range))
                {
                    $this->return .= ($i == $this->current_page And $_GET['page'] != 'All') ? "<a title=\"Go to page $i of $this->num_pages\" class=\"current\" href=\"#\">$i</a> ":"<a class=\"paginate\" title=\"Go to page $i of $this->num_pages\" href=\"$_SERVER[PHP_SELF]".$this->urlparam."&page=$i&ipp=$this->items_per_page\">$i</a> ";
                }
                if($this->range[$this->mid_range-1] < $this->num_pages-1 And $i == $this->range[$this->mid_range-1]) $this->return .= " ... ";
            }
            $this->return .= (($this->current_page != $this->num_pages And $this->items_total >= 10) And ($_GET['page'] != 'All')) ? "<a class=\"paginate\" href=\"$_SERVER[PHP_SELF]".$this->urlparam."&page=$next_page&ipp=$this->items_per_page\">Next È</a>\n":"<span class=\"inactive\" href=\"#\">È Next</span>\n";
            $this->return .= ($_GET['page'] == 'All') ? "(<a class=\"current\" style=\"margin-left:10px\" href=\"#\">All</a>) \n":"(<a class=\"paginate\" style=\"margin-left:10px\" href=\"$_SERVER[PHP_SELF]".$this->urlparam."&page=1&ipp=All\">All</a>) \n";
        }
        else
        {
            for($i=1;$i<=$this->num_pages;$i++)
            {
                $this->return .= ($i == $this->current_page) ? "<a class=\"current\" href=\"#\">$i</a> ":"<a class=\"paginate\" href=\"$_SERVER[PHP_SELF]".$this->urlparam."&page=$i&ipp=$this->items_per_page\">$i</a> ";
            }
            $this->return .= "(<a class=\"paginate\" href=\"$_SERVER[PHP_SELF]".$this->urlparam."&page=1&ipp=All\">All</a>) \n";
        }
        $this->low = ($this->current_page-1) * $this->items_per_page;
        $this->high = ($_GET['ipp'] == 'All') ? $this->items_total:($this->current_page * $this->items_per_page)-1;
        $this->limit = ($_GET['ipp'] == 'All') ? "":" LIMIT $this->low,$this->items_per_page";
    }

    function display_items_per_page()
    {
        $items = '';
        $ipp_array = array(15,25,50,100,'All');
        foreach($ipp_array as $ipp_opt)    $items .= ($ipp_opt == $this->items_per_page) ? "<option selected value=\"$ipp_opt\">$ipp_opt</option>\n":"<option value=\"$ipp_opt\">$ipp_opt</option>\n";
        return "<span class=\"paginate\">Items per page:</span><select class=\"paginate\" onchange=\"window.location='$_SERVER[PHP_SELF]".$this->urlparam."&page=1&ipp='+this[this.selectedIndex].value;return false\">$items</select>\n";
    }

    function display_jump_menu()
    {
        for($i=1;$i<=$this->num_pages;$i++)
        {
            $option .= ($i==$this->current_page) ? "<option value=\"$i\" selected>$i</option>\n":"<option value=\"$i\">$i</option>\n";
        }
        return "<span class=\"paginate\">Page:</span><select class=\"paginate\" onchange=\"window.location='$_SERVER[PHP_SELF]".$this->urlparam."&page='+this[this.selectedIndex].value+'&ipp=$this->items_per_page';return false\">$option</select>\n";
    }

    function display_pages()
    {
        return $this->return;
    }
}
?>
