Proof of concept:

[platal.git] / htdocs / stats / graph_by_promo.php

<?php
/***************************************************************************
 *  Copyright (C) 2003-2006 Polytechnique.org                              *
 *  http://opensource.polytechnique.org/                                   *
 *                                                                         *
 *  This program is free software; you can redistribute it and/or modify   *
 *  it under the terms of the GNU General Public License as published by   *
 *  the Free Software Foundation; either version 2 of the License, or      *
 *  (at your option) any later version.                                    *
 *                                                                         *
 *  This program is distributed in the hope that it will be useful,        *
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
 *  GNU General Public License for more details.                           *
 *                                                                         *
 *  You should have received a copy of the GNU General Public License      *
 *  along with this program; if not, write to the Free Software            *
 *  Foundation, Inc.,                                                      *
 *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA                *
 ***************************************************************************/

require_once("xorg.inc.php");

new_skinned_page('index.tpl', AUTH_COOKIE);
$promo = Env::getInt('promo', Session::getInt('promo'));

// date de départ
$depart = 1920;

//recupere le nombre d'inscriptions par jour sur la plage concernée
$res = $globals->xdb->iterRow(
        "SELECT  promo, SUM(perms IN ('admin', 'user')) / COUNT(*) * 100
           FROM  auth_user_md5
          WHERE  promo >= $depart AND deces = 0
       GROUP BY  promo");

//genere des donnees compatibles avec GNUPLOT
$inscrits='';

// la première ligne contient le total des inscrits avant la date de départ
list($annee, $nb) = $res->next();

for ($i=$depart;$i<=date("Y");$i++) {
    if ($annee<$i) {
        if(!list($annee, $nb) = $res->next()) {
            $annee = 0;
            $nb = 0;
        }
    }
    if ($nb > 0 || $i < date("Y"))
    	$inscrits .= $i." ".$nb."\n";
}

//Genere le graphique à la volée avec GNUPLOT
header( "Content-type: image/png");

$ymin = 0;
$ymax = 100;

$fin = $i+10;

$gnuplot = <<<EOF2
gnuplot <<EOF

set term png small color
set size 640/480
set timefmt "%d/%m/%y"

set xr [$depart:$fin]
set yr [$ymin:$ymax]

set title "Nombre d'inscrits par promotion depuis $depart."

plot "-" using 1:2 title 'inscrits' with boxes;
{$inscrits}
EOF
EOF2;

passthru($gnuplot);
?>