source: plugins/referer/trunk/_public.php @ 2739

<?php
# -- BEGIN LICENSE BLOCK ----------------------------------
# This file is part of referer, a plugin for Dotclear.
# 
# Copyright (c) 2008-2010 Tomtom
# http://blog.zenstyle.fr/
# 
# Licensed under the GPL version 2.0 license.
# A copy of this license is available in LICENSE file or at
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# -- END LICENSE BLOCK ------------------------------------

if (!defined('DC_RC_PATH')) { return; }

$core->addBehavior('publicBeforeDocument',array('refererBehaviors','addReferer'));

class refererBehaviors
{
     /*
      * Adds referers in settings
      */
     public static function addReferer($core)
     {
          $last = unserialize($core->blog->settings->referer->last_referer);
          $top = unserialize($core->blog->settings->referer->top_referer);

          $ref = isset($_SERVER['HTTP_REFERER']) ? trim(html::escapeHTML($_SERVER['HTTP_REFERER'])) : '';

          if (!empty($ref)) {
               $url = parse_url($ref);
               $domain = !empty($url['host']) ? $url['scheme'].'://'.$url['host'] : __('Direct entrance');
               $ownurl = parse_url($core->blog->url);
               $owndomain = $ownurl['scheme'].'://'.$ownurl['host'];
               $time = time() + dt::getTimeOffset($core->blog->settings->system->blog_timezone);

               if ($owndomain == $domain) {
                    return;
               }
               # Added last referer
               $new_last = array(
                    'domain'  => $domain,
                    'url'     => $ref,
                    'dt'      => $time
               );
               if (count($last) > 19) {
                    unset($last[19]);
               }
               array_unshift($last,$new_last);

               # Added top referer
               $new_top = array(
                    'domain' => $domain,
                    'count' => 0,
               );
               $find = false;
               foreach ($top as $k => $v) {
                    if ($v['domain'] == $domain) { 
                         $top[$k]['count']++;
                         $find = true;
                         break;
                    }
               }
               if (count($top) > 19 && !$find) {
                    usort($top,'refererBehaviors::cmp');
                    unset($top[19]);
               }
               if (!$find) {
                    array_unshift($top,$new_top);
               }

               $core->blog->settings->referer->put('last_referer',serialize($last));
               $core->blog->settings->referer->put('top_referer',serialize($top));
          }
     }

     public static function cmp($a,$b)
     {
          if ($a['count'] == $b['count']) {
               return 0;
          }
          return $a['count'] < $b['count'] ? -1 : 1;
     }
}

class refererPublic
{
     /**
      * This function displays the referer widget
      *
      * @param w    Widget object
      *
      * @return     string
      */
     public static function last($w)
     {
          global $core;

          if ($w->homeonly && $core->url->type != 'default') {
               return;
          }

          $limask = '<li>%s</li>';
          $amask = '<a href="%1$s">%2$s</a>';

          $title = strlen($w->title) > 0 ? '<h2>'.html::escapeHTML($w->title).'</h2>' : '';

          $last = unserialize($core->blog->settings->referer->last_referer);
          
          if (count($last) === 0) {
               return;
          }

          $res = '';

          foreach ($last as $k => $v) {
               if ($k < $w->numbertodisplay) {
                    $link = sprintf($amask,$v['url'],$v['domain']);
                    $res .= sprintf($limask,$link);
               }
          }

          return 
               '<div id="last_referers">'.
               $title.
               (!empty($res) ? '<ul>'.$res.'</ul>' : '').
               '</div>';
     }

     /**
      * This function displays the top referer widget
      *
      * @param w    Widget object
      *
      * @return     string
      */
     public static function top($w)
     {
          global $core;

          if ($w->homeonly && $core->url->type != 'default') {
               return;
          }

          $limask = '<li>%s</li>';
          $amask = '<a href="%1$s">%2$s</a>';

          $title = strlen($w->title) > 0 ? '<h2>'.html::escapeHTML($w->title).'</h2>' : '';

          $top = unserialize($core->blog->settings->referer->top_referer);

          if (count($top) === 0) {
               return;
          }
          
          $res = '';

          foreach ($top as $k => $v) {
               if ($k < $w->numbertodisplay) {
                    $link = sprintf($amask,$v['domain'],$v['domain']);
                    $res .= sprintf($limask,$link.' - <em>'.$v['count'].' '.__('visit(s)').'</em>');
               }
          }

          return
               '<div id="top_referers">'.
               $title.
               (!empty($res) ? '<ul>'.$res.'</ul>' : '').
               '</div>';
     }
}

?>