<?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;

function makeGraph($type = 'bar')

{

  global $webtheme;

  $class = ( $type == 'line' ) ? 'LineGraph' : 'BarGraph';

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

  $g->SetGraphAreaHeight(200);

  $g->SetGraphPadding(30, 30, 20, 15);

  if ( get_class($g) == 'BarGraph' )

  {

    $g->SetBarPadding(7);

    $g->SetBarFont(1);

    $g->SetBarDimensions(25, 7);

  }

  else if ( get_class($g) == 'LineGraph' )

  {

    $g->SetGraphAreaWidth(800);

  }

  $g->SetAxisDeepness(7);

  $g->SetGraphTitleFont(2);

  $g->SetGraphBackgroundTransparent(false, 240, 250, 255);

  $g->SetGraphTransparency(25);

  $g->SetAxisScaleColor(90, 90, 90);

  $g->SetAxisScaleFont(1);

  $g->SetScaleRoundY(0);

  $g->SetScaleRoundX(0);

  $g->SetAxisStepSize(7);

  if ( file_exists("./themes/$webtheme/graph_$type.def") )

    $g->LoadGraph(realpath("./themes/$webtheme/graph_$type.def"));

  return $g;

}

// 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:

    $g = makeGraph();

    $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':

    $g = makeGraph();

    $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':

    $g = makeGraph();

    $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;

  case 'lasthour':

    $g = makeGraph('line');

    $g->SetAxisStepX(5);

    $g->SetScaleFunctionX('lasthour_scaler');

    function lasthour_scaler($v, $g)

    {

      $k = array_keys($g->data);

      return ( isset($k[$v]) ) ? $k[$v] : 'now';

    }

    $graph_title = $channel . ' activity - last hour';

    $data = stats_raw_data($channel, 59);

    $agg = array();

    foreach ( $data as $message )

    {

      $tid = intval(ltrim(date('i', $message['time']), '0'));

      if ( !isset($agg[$tid]) )

        $agg[$tid] = 0;

      $agg[$tid]++;

    }

    $graphdata = array();

    $minutenow = intval(ltrim(date('i', NOW), '0'));

    $hournow = intval(ltrim(date('H', NOW), '0'));

    $hourthen = intval(ltrim(date('H', NOW-3600), '0'));

    for ( $i = $minutenow + 1; $i < 60; $i++ )

    {

      $istr = ( $i < 10 ) ? "0$i" : "$i";

      $graphdata["$hourthen:$istr"] = ( isset($agg[$i]) ) ? $agg[$i] : 0;

    }

    for ( $i = 0; $i <= $minutenow; $i++ )

    {

      $istr = ( $i < 10 ) ? "0$i" : "$i";

      $graphdata["$hournow:$istr"] = ( isset($agg[$i]) ) ? $agg[$i] : 0;

    }

    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->data = $graphdata;

$g->SetGraphTitle($graph_title);

$g->SetAxisStepY($interval);

$g->DrawGraph();