<?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

$mode = ( isset($_GET['mode']) ) ? $_GET['mode'] : 'lastday';

switch ( $mode )

{

  case 'lastday':

  default:

    $graph_title = $channel . ' message count - last 24 hours';

    $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);

    }

    break;

  case 'lastweek':

    $graph_title = $channel . ' activity - last 14 days';

    $this_day = gmmktime(0, 0, 0);

    $graphdata = array();

    for ( $i = 13; $i >= 0; $i-- )

    {

      $basetime = $this_day - ( $i * 86400 );

      $ts = date('D n/j', $basetime);

      $basetime += 86400;

      $graphdata[$ts] = stats_message_count($channel, 1440, $basetime);

    }

    $g->SetBarPadding(12);

    break;

  case 'lastmonth':

    $graph_title = $channel . ' activity - last 30 days';

    $this_day = gmmktime(0, 0, 0);

    $graphdata = array();

    for ( $i = 29; $i >= 0; $i-- )

    {

      $basetime = $this_day - ( $i * 86400 );

      $ts = date('Y-m-d', $basetime);

      $basetime += 86400;

      $graphdata[$ts] = stats_message_count($channel, 1440, $basetime);

    }

    $g->SetBarPadding(15);

    break;

}

$max = max($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 > 3200 )

  $interval = 300;

if ( $max > 4000 )

  $interval = 500;

if ( $max > 5000 )

  $interval = 1000;

if ( $max > 15000 )

  $interval = 1500;

if ( $max > 30000 )

  $interval = round($max / 10);

$g->SetGraphTitle($graph_title);

$g->DrawGraph();