htdocs/stats/graph_promo.php

   1 <?php
   2 /***************************************************************************
   3  *  Copyright (C) 2003-2004 Polytechnique.org                              *
   4  *  http://opensource.polytechnique.org/                                   *
   5  *                                                                         *
   6  *  This program is free software; you can redistribute it and/or modify   *
   7  *  it under the terms of the GNU General Public License as published by   *
   8  *  the Free Software Foundation; either version 2 of the License, or      *
   9  *  (at your option) any later version.                                    *
  10  *                                                                         *
  11  *  This program is distributed in the hope that it will be useful,        *
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
  14  *  GNU General Public License for more details.                           *
  15  *                                                                         *
  16  *  You should have received a copy of the GNU General Public License      *
  17  *  along with this program; if not, write to the Free Software            *
  18  *  Foundation, Inc.,                                                      *
  19  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA                *
  20  ***************************************************************************/
  21
  22 require_once("xorg.inc.php");
  23
  24 new_skinned_page('index.tpl', AUTH_COOKIE);
  25 $promo = Env::getInt('promo', Session::getInt('promo'));
  26
  27 //nombre de jours sur le graph
  28 $JOURS=364;
  29 define('DUREEJOUR',24*3600);
  30 $res = $globals->xdb->query("SELECT min(TO_DAYS(date_ins)-TO_DAYS(now())) FROM auth_user_md5 WHERE promo = {?} AND perms IN ('admin', 'user')", $promo);
  31 $JOURS = -$res->fetchOneCell();
  32
  33 //recupere le nombre d'inscriptions par jour sur la plage concernée
  34 $res = $globals->xdb->iterRow(
  35         "SELECT  IF( date_ins>DATE_SUB(NOW(),INTERVAL $JOURS DAY),
  36                      TO_DAYS(date_ins)-TO_DAYS(NOW()),
  37                     ".(-($JOURS+1)).") AS jour,
  38                  COUNT(user_id) AS nb
  39            FROM  auth_user_md5
  40           WHERE  promo = {?} AND perms IN ('admin','user')
  41        GROUP BY  jour", $promo);
  42
  43 //genere des donnees compatibles avec GNUPLOT
  44 $inscrits='';
  45
  46 // la première ligne contient le total des inscrits avant la date de départ (J - $JOURS)
  47 list(,$init_nb) = $res->next();
  48 $total = $init_nb;
  49
  50 list($numjour, $nb) = $res->next();
  51
  52 for ($i=-$JOURS;$i<=0;$i++) {
  53     if ($numjour<$i) {
  54         if(!list($numjour, $nb) = $res->next()) {
  55             $numjour = 0;
  56             $nb = 0;
  57         }
  58     }
  59     if ($numjour==$i) $total+=$nb;
  60     $inscrits .= date('d/m/y',$i*DUREEJOUR+time())." ".$total."\n";
  61 }
  62
  63 //Genere le graphique à la volée avec GNUPLOT
  64 header( "Content-type: image/png");
  65
  66 $delt = ($total - $init_nb) / 10;
  67 $delt += ($delt < 1);
  68 $ymin = round($init_nb - $delt,0);
  69 $ymax = round($total   + $delt,0);
  70
  71 $gnuplot = <<<EOF2
  72 gnuplot <<EOF
  73
  74 set term png small color
  75 set size 640/480
  76 set xdata time
  77 set timefmt "%d/%m/%y"
  78
  79 set format x "%m/%y"
  80 set yr [$ymin:$ymax]
  81
  82 set title "Nombre d'inscrits de la promotion $promo."
  83
  84 plot "-" using 1:2 title 'inscrits' with lines;
  85 {$inscrits}e
  86 EOF
  87 EOF2;
  88
  89 passthru($gnuplot);
  90 ?>