/application/lib/Auxilary/Paging.php

<?php

/**
 * A common class for the paging routines.
 *
 */
class lib_Auxilary_Paging {

  /**
   * Basic paging routine. Lists all pages from 1 to the end.
   *
   * @param string $classPrefix Class prefix that will be used for output
   * @param string $total Count of records || Database query (normally is `SELECT COUNT(*)`)
   * @param int $perPage Number of records per page
   * @param int $currentPage Page we are currently on
   * @param string $hrefTemplate Custom template, %page% is replaced by actual page number
   * @param string $title Common title, omitted if empty
   * @return string
   */
  public function load ($classPrefix, $total, $perPage = 10, $currentPage = 1, $hrefTemplate = "./page-%page%/", $title = "????????: ") {

    if (!is_int($total)) {
      $db = Zend_Registry::get ('db');
      $total = $db->fetchFirst ($query);
    }

    if (ceil ($total / $perPage) <= 1) return '';
    $Range = array();
    for ($i = 1; $i <= ceil ($total / $perPage); $i++)
    $Range[$i] = $i;

    return $this->_display($classPrefix, $total, $currentPage, $Range, $hrefTemplate, $title);
  }

  
  /**
   * Advanced paging routine. Lists some pages around current page and then some from the end of paging list.
   *
   * @param string $classPrefix Class prefix that will be used for output
   * @param int $total Count of records
   * @param int $firstPages Number of pages displayed around currentPage
   * @param int $lastPages Number of pages displayed at the far edge of the list
   * @param int $perPage Number of records per page
   * @param int $currentPage Page we are currently on
   * @param string $hrefTemplate Custom template, %page% is replaced by actual page number
   * @param string $title Common title, omitted if empty
   * @return string
   */
  public static function loadFirstAndFinal ($classPrefix, $total, $firstPages = 10, $lastPages = 2, $perPage = 10, $currentPage = 1, $hrefTemplate = "./page-%page%/", $title = "????????: ") {

    $Range = array();
    $total = ceil ($total / $perPage);
    if ($total <= 1) return '';

    do {

      if ($total <= $firstPages + $lastPages) { $Range = self::_range(1, $total); break; }

      if ($currentPage <= (ceil ($total / 2))) {

        // Beginning of the array
        
        $start = $currentPage - ceil(($firstPages / 2));
        if ($start < 1) $start = 1;
        $Range = $Range + self::_range($start, $start + $firstPages - 1);
        end($Range); $latest = key($Range); $Range[$latest] = '..';
        reset($Range); $first = key($Range); if ($Range[$first] != 1) $Range[$first] = '..';
        $Range = $Range + self::_range($total - $lastPages + 1, $total);
        break;
      }

      // End of the array

      $start = $currentPage + ceil(($firstPages / 2));
      if ($start > $total) $start = $total;
      $Range = $Range + self::_range($total, $total - $firstPages + 1);
      reset($Range); $latest = key($Range); $Range[$latest] = '..';
      end($Range); $first = key($Range); if ($Range[$first] != $total) $Range[$first] = '..';

      $Range = self::_range(1, $lastPages) + $Range;



    } while(0);

    return self::_display($classPrefix, $currentPage, $Range, $hrefTemplate, $title);

  }




  private static function _range ($start, $finish) {
    $Range = array();
    if ($finish <= $start) list ($start, $finish) = array ($finish, $start);
    for ($i = $start; $i <= $finish; $i++) $Range[$i] = $i;
    return $Range;
  }

  private static function _display ($classPrefix, $currentPage, $Range, $hrefTemplate = "./page-%page%/", $title = "????????: ") {

    $result = '<div class="'.$classPrefix.'"><ul>';

    if ($title)
    $result .= "<li class=\"{$classPrefix}_title\">$title</li>";

    foreach ($Range as $number => $string) {
      if ($number == $currentPage) {
        $result .= '<li class="'.$classPrefix.'_currentpage">'.$string.'</li>'; continue;
      }
      $result .= '<li><a href="'.str_replace('%page%', $number, $hrefTemplate).'">'.$string.'</a></li>';
    }

    $result .= '</ul></div>';

    return $result;

  }




}