htdocs/stats/graph_evolution.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
  26 //nombre de jours sur le graph
  27 $JOURS=Env::getInt('jours', 364);
  28 define('DUREEJOUR',24*3600);
  29
  30 //recupere le nombre d'inscriptions par jour sur la plage concernée
  31 $res = $globals->xdb->iterRow(
  32         "SELECT  IF( date_ins>DATE_SUB(NOW(),INTERVAL $JOURS DAY),
  33                      TO_DAYS(date_ins)-TO_DAYS(NOW()),
  34                     ".(-($JOURS+1)).") AS jour,
  35                  COUNT(user_id) AS nb
  36            FROM  auth_user_md5
  37           WHERE  perms IN ('admin','user')
  38        GROUP BY  jour");
  39
  40 //genere des donnees compatibles avec GNUPLOT
  41 $inscrits='';
  42
  43 // la première ligne contient le total des inscrits avant la date de départ (J - $JOURS)
  44 list(,$init_nb) = $res->next();
  45 $total = $init_nb;
  46
  47 list($numjour, $nb) = $res->next();
  48
  49 for ($i=-$JOURS;$i<=0;$i++) {
  50     if ($numjour<$i) {
  51         if(!list($numjour, $nb) = $res->next()) {
  52             $numjour = 0;
  53             $nb = 0;
  54         }
  55     }
  56     if ($numjour==$i) $total+=$nb;
  57     $inscrits .= date('d/m/y',$i*DUREEJOUR+time())." ".$total."\n";
  58 }
  59
  60 //Genere le graphique à la volée avec GNUPLOT
  61 header( "Content-type: image/png");
  62
  63 $delt = ($total - $init_nb)/10;
  64 $ymin = round($init_nb - $delt,0);
  65 $ymax = round($total   + $delt,0);
  66
  67 $gnuplot = <<<EOF2
  68 gnuplot <<EOF
  69
  70 set term png small color
  71 set size 640/480
  72 set xdata time
  73 set timefmt "%d/%m/%y"
  74
  75 set format x "%m/%y"
  76 set yr [$ymin:$ymax]
  77
  78 set title "Nombre d'inscrits"
  79
  80 plot "-" using 1:2 title 'inscrits' with lines;
  81 {$inscrits}
  82 EOF
  83 EOF2;
  84
  85 passthru($gnuplot);
  86 ?>