<?
require('/home/httpd/html/circus/chart/chart.php');

$fp = fopen("/home/httpd/html/s/active", "r");
if (!$fp)
  exit;

while (! feof($fp)) {
  $line = fgets($fp, 1000);
  list ($group, $articles) = explode(" ", $line);
  $groups[$group] = $articles;
}

for ($year = 1997; $year < 2013; $year++) {
  for ($week = 1; $week < 53; $week++) {
    $date = date("Ymd", strtotime("${year}W$week"));    
    if ($date > 19700101) {
      $data[$i] += $groups["sent.${year}w$week"];
    }
  }
  $i++;
  $dates[] = "${year}0101";
}

$chart = new chart(700, 400);
$chart->plot($data, false, "black", "impulse");
$chart->set_x_ticks($dates);
$chart->stroke();