<?php

require('../stats-fe.php');
require('../graphs.php');
require('../timezone.php');

$channel_list = stats_channel_list();
$first_channel = $channel_list[0];
$channel = ( isset($_REQUEST['channel']) && in_array($_REQUEST['channel'], $channel_list) ) ? $_REQUEST['channel'] : $first_channel;

// generate the data
// we're doing this by absolute hours, not by strictly "24 hours ago", e.g. on-the-hour stats
$this_hour = gmmktime(gmdate('H'), 0, 0);
$graphdata = array();

for ( $i = 23; $i >= 0; $i-- )
{
  $basetime = $this_hour - ( $i * 3600 );
  $ts = date('H:i', $basetime);
  $basetime += 3600;
  $graphdata[$ts] = stats_message_count($channel, 60, $basetime);
}

$max = max($graphdata);

// Determine axis interval
$interval = 2;
if ( $max > 20 )
  $interval = 4;
if ( $max > 25 )
  $interval = 5;
if ( $max > 50 )
  $interval = 10;
if ( $max > 200 )
  $interval = 40;
if ( $max > 500 )
  $interval = 80;
if ( $max > 1000 )
  $interval = 100;
if ( $max > 2000 )
  $interval = 200;
if ( $max > 5000 )
  $interval = 1000;
if ( $max > 15000 )
  $interval = 1500;
if ( $max > 30000 )
  $interval = round($max / 10);

$g = new GraphMaker(); // _Compat();

$g->SetGraphPadding(20, 30, 20, 15);
$g->SetGraphAreaHeight(200);
$g->SetBarDimensions(26, 0);
$g->SetBarPadding(7);
$g->SetBarData($graphdata);
$g->SetGraphBackgroundTransparent(240, 250, 255, 0);
$g->SetGraphTransparency(25);
$g->SetAxisStep($interval);
$g->SetGraphTitle($channel . ' message count - last 24 hours');

$g->DrawGraph();