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<?php

/***************************************************************************\
 *  SPIP, Systeme de publication pour l'internet                           *
 *                                                                         *
 *  Copyright (c) 2001-2005                                                *
 *  Arnaud Martin, Antoine Pitrou, Philippe Riviere, Emmanuel Saint-James  *
 *                                                                         *
 *  Ce programme est un logiciel libre distribue sous licence GNU/GPL.     *
 *  Pour plus de details voir le fichier COPYING.txt ou l'aide en ligne.   *
\***************************************************************************/


// Ce fichier ne sera execute qu'une fois
if (defined("_ECRIRE_INC_STATISTIQUES")) return;
define("_ECRIRE_INC_STATISTIQUES", "1");

//
// Compiler les statistiques temporaires : visites
//

// Les deux fonctions suivantes sont adaptees du code des "Visiteurs",
// par Jean-Paul Dezelus (http://www.phpinfo.net/applis/visiteurs/)

function stats_load_engines() {
        // le moteur de recherche interne
        $arr_engines = Array();

        $file_name = 'engines-list.txt';
        if ($fp = @fopen($file_name, 'r'))
        {
                while ($data = fgets($fp, 256))
                {
                        $data = trim(chop($data));

                        if (!ereg('^#', $data) && $data != '')
                        {
                                if (ereg('^\[(.*)\]$', $data, $engines))
                                {
                                        // engine
                                        $engine = $engines[1];

                                        // query | dir
                                        if (!feof($fp))
                                        {
                                                $data = fgets($fp, 256);
                                                $query_or_dir = trim(chop($data));
                                        }
                                }
                                else
                                {
                                        $host = $data;
                                        $arr_engines[] = Array($engine, $query_or_dir, $host);
                                }
                        }
                }
                fclose($fp);
        }
        return $arr_engines;
}

function stats_show_keywords($kw_referer, $kw_referer_host) {
        static $arr_engines;
        static $url_site;
        include_ecrire("inc_filtres.php3");

        if (!$arr_engines) {
                // Charger les moteurs de recherche
                $arr_engines = stats_load_engines();

                // initialiser la recherche interne
                $url_site = lire_meta('adresse_site');
                $url_site = strtolower(eregi_replace("^((https?|ftp)://)?(www\.)?", "", $url_site));
        }

        $url   = @parse_url( $kw_referer );
        $query = $url['query'];
        $host  = strtolower($url['host']);
        $path  = $url['path'];

        // Cette fonction affecte directement les variables selon la query-string !
        parse_str($query);

        $keywords = '';
        $found = false;
        
        if (strpos('-'.$kw_referer, eregi_replace("^(https?:?/?/?)?(www\.)?", "",$url_site))) {
                if (eregi("(s|search|r|recherche)=([^&]+)", $kw_referer, $regs))
                        $keywords = urldecode($regs[2]);
                        
                        
                else
                        return '';
        } else
        for ($cnt = 0; $cnt < sizeof($arr_engines) && !$found; $cnt++)
        {
                if ($found = (ereg($arr_engines[$cnt][2], $host)))
                {
                        $kw_referer_host = $arr_engines[$cnt][0];
                        
                        if (ereg('=', $arr_engines[$cnt][1])) {
                        
                                // Fonctionnement simple: la variable existe
                                $keywords = ${str_replace('=', '', $arr_engines[$cnt][1])};
                                
                                // Si on a defini le nom de la variable en expression reguliere, chercher la bonne variable
                                if (! strlen($keywords) > 0) {
                                        if (ereg($arr_engines[$cnt][1]."([^\&]*)", $query, $vals)) {
                                                $keywords = urldecode($vals[2]);
                                        }
                                }
                        } else {
                                $keywords = "";
                        }
                                                
                        if ((  ($kw_referer_host == "Google")
                                || ($kw_referer_host == "AOL" && !ereg('enc=iso', $query))
                                || ($kw_referer_host == "MSN")
                                )) {
                                include_ecrire('inc_charsets.php3');
                                if (!$cset = $ie) $cset = 'utf-8';
                                $keywords = importer_charset($keywords,$cset);
                        }
                        $buffer["hostname"] = $kw_referer_host;
                }
        }

        $buffer["host"] = $host;
        if (!$buffer["hostname"])
                $buffer["hostname"] = $host;
        
        $buffer["path"] = substr($path, 1, strlen($path));
        $buffer["query"] = $query;

        if ($keywords != '')
        {
                if (strlen($keywords) > 150) {
                        $keywords = spip_substr($keywords, 0, 148);
                        // supprimer l'eventuelle entite finale mal coupee
                        $keywords = preg_replace('/&#?[a-z0-9]*$/', '', $keywords);
                }
                $buffer["keywords"] = trim(entites_html(stripslashes($keywords)));
        }

        return $buffer;

}


//
// Optimiser les informations liees aux referers
//

function supprimer_referers($type = "") {
        $table = 'spip_referers';
        if ($type) {
                $table .= '_'. $type . 's';
                $col_id = 'id_' . $type;
                $query = "SELECT COUNT(DISTINCT $col_id) AS count FROM $table";
                $result = spip_query($query);
                if ($row = @spip_fetch_array($result)) {
                        $count = $row['count'];
                }
        }
        if (!$count) $count = 1;

        $query = "SELECT visites FROM $table ".
                "ORDER BY visites LIMIT ".intval($count * 100).",1";
        $result = spip_query($query);
        $visites_min =  1;
        if ($row = @spip_fetch_array($result)) {
                $visites_min = $row['visites'];
        }

        $query = "DELETE FROM $table WHERE (date < DATE_SUB(NOW(),INTERVAL 7 DAY) AND visites <= $visites_min) OR (date < DATE_SUB(NOW(),INTERVAL 30 DAY))";
        $result = spip_query($query);
}



//
// Compiler les statistiques temporaires : referers (si active)
//

function calculer_n_referers($nb_referers) {
        $date = date("Y-m-d");

        $result = spip_query("SELECT COUNT(DISTINCT ip) AS visites, referer, HEX(referer_md5) AS md5 ".
                             "FROM spip_referers_temp GROUP BY referer_md5 LIMIT 0,$nb_referers");

        $tous = spip_num_rows($result);

        $referer_insert = "";
        $referer_update = "";
        $referer_vus = "";

        while ($row = @spip_fetch_array($result)) {
                $visites = $row['visites'];
                $referer = addslashes($row['referer']);
                $referer_md5 = '0x'.$row['md5'];
                $referer_update[$visites][] = $referer_md5;
                $referer_insert[] = "('$date', '$referer', $referer_md5, $visites, $visites)";
                $referer_vus .= "," . $referer_md5;
        }
        if ($referer_vus) 
          $referer_vus = "referer_md5 IN (" . substr($referer_vus,1) . ")";

        // Mise a jour de la base
        if (is_array($referer_update)) {
                while (list($visites, $referers) = each($referer_update)) {
                        $query = "UPDATE spip_referers SET visites = visites + $visites, visites_jour = visites_jour + $visites ".
                                "WHERE referer_md5 IN (".join(', ', $referers).")";
                        $result = spip_query($query);
                }
        }
        if (is_array($referer_insert)) {
                $query_insert = "INSERT IGNORE INTO spip_referers ".
                        "(date, referer, referer_md5, visites, visites_jour) VALUES ".join(', ', $referer_insert);
                $result_insert = spip_query($query_insert);
        }

        // Ventiler ces referers article par article
        $query = "SELECT COUNT(DISTINCT ip) AS visites, id_objet, referer, HEX(referer_md5) AS md5 FROM spip_referers_temp WHERE type='article'"
                  . ($referer_vus ? " AND $referer_vus" : '')
                  . " GROUP BY id_objet, referer_md5";
        $result = spip_query($query);

        $referer_insert = "";
        $referer_update = "";

        while ($row = @spip_fetch_array($result)) {
                $id_article = $row['id_objet'];
                $visites = $row['visites'];
                $referer = addslashes($row['referer']);
                $referer_md5 = '0x'.$row['md5'];

                $referer_update[$visites][] = "(id_article=$id_article AND referer_md5=$referer_md5)";
                $referer_insert[] = "('$date', '$referer', $referer_md5, $id_article, $visites)";
        }

        // Mise a jour de la base
        if (is_array($referer_update)) {
                while (list($visites, $where) = each($referer_update)) {
                        $query = "UPDATE spip_referers_articles SET visites = visites + $visites ".
                                "WHERE ".join(' OR ', $where);
                        $result = spip_query($query);
                }
        }
        if (is_array($referer_insert)) {
                $query_insert = "INSERT IGNORE INTO spip_referers_articles ".
                        "(date, referer, referer_md5, id_article, visites) VALUES ".join(', ', $referer_insert);
                $result_insert = spip_query($query_insert);
        }

        // Effacer les referers traites
        if ($referer_vus) {
          spip_query("DELETE FROM spip_referers_temp WHERE $referer_vus");
        }
        return  $tous ;
}


//
// Afficher les referers d'un article (ou du site)
//
function aff_referers ($query, $limit=10, $plus = true) {
        // Charger les moteurs de recherche
        $arr_engines = stats_load_engines();

        $query .= " LIMIT 0,$limit";
        $result = spip_query($query);
        
        while ($row = spip_fetch_array($result)) {
                $referer = interdire_scripts($row['referer']);
                $visites = $row['vis'];
                $tmp = "";
                
                $buff = stats_show_keywords($referer, $referer);
                
                if ($buff["host"]) {
                        $numero = substr(md5($buff["hostname"]),0,8);
        
                        $nbvisites[$numero] = $nbvisites[$numero] + $visites;

                        if (strlen($buff["keywords"]) > 0) {
                                $criteres = substr(md5($buff["keywords"]),0,8);
                                if (!$lescriteres[$numero][$criteres])
                                        $tmp = " &laquo;&nbsp;".$buff["keywords"]."&nbsp;&raquo;";
                                $lescriteres[$numero][$criteres] = true;
                        } else {
                                $tmp = $buff["path"];
                                if (strlen($buff["query"]) > 0) $tmp .= "?".$buff['query'];
                
                                if (strlen($tmp) > 30)
                                        $tmp = "/".substr($tmp, 0, 27)."...";
                                else if (strlen($tmp) > 0)
                                        $tmp = "/$tmp";
                        }

                        if ($tmp)
                                $lesreferers[$numero][] = "<a href='$referer'>$tmp</a>" . (($visites > 1)?" ($visites)":"");
                        else
                                $lesliensracine[$numero] += $visites;
                        $lesdomaines[$numero] = $buff["hostname"];
                        $lesurls[$numero] = $buff["host"];
                        $lesliens[$numero] = $referer;
                }
        }
        
        if (count($nbvisites) > 0) {
                arsort($nbvisites);

                $aff = "<ul>";
                for (reset($nbvisites); $numero = key($nbvisites); next($nbvisites)) {
                        if ($lesdomaines[$numero] == '') next;

                        $visites = pos($nbvisites);
                        $ret = "\n<li>";

                        if ($visites > 5) $ret .= "<font color='red'>$visites "._T('info_visites')."</font> ";
                        else if ($visites > 1) $ret .= "$visites "._T('info_visites')." ";
                        else $ret .= "<font color='#999999'>$visites "._T('info_visite')."</font> ";

                        if (count($lesreferers[$numero]) > 1) {
                                $referers = join ("</li><li>",$lesreferers[$numero]);
                                $aff .= "<p />";
                                $aff .= $ret;
                                $aff .= "<a href='http://".$lesurls[$numero]."'><b><font color='$couleur_foncee'>".$lesdomaines[$numero]."</font></b></a>";
                                if ($rac = $lesliensracine[$numero]) $aff .= " <font size='1'>($rac)</font>";
                                $aff .= "<ul><font size='1'><li>$referers</li></font></ul>";
                                $aff .= "</li><p />\n";
                        } else {
                                $aff .= $ret;
                                $lien = $lesreferers[$numero][0];
                                if (eregi("^(<a [^>]+>)([^ ]*)( \([0-9]+\))?", $lien, $regs))
                                        $lien = $regs[1].$lesdomaines[$numero].$regs[2];
                                else
                                        $lien = "<a href='http://".$lesdomaines[$numero]."'>".$lesdomaines[$numero]."</a>";
                                $aff .= "<b>$lien</b>";
                                $aff .= "</li>\n";
                        }
                }
                $aff .= "</ul>";

                // Le lien pour en afficher "plus"
                if ($plus AND (spip_num_rows($result) == $limit)) {
                        $lien = $GLOBALS['clean_link'];
                        $lien->addVar('limit',$limit+200);
                        $aff .= "<div style='text-align:right;'><b><a href='".$lien->getUrl()."'>+++</a></b></div>";
                }
        }


        return $aff;
}

?>