<?php

require('../stats-fe.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;

$formats = array('json', 'xml');

$format = ( isset($_GET['format']) ) ? $_GET['format'] : $formats[0];

if ( !in_array($format, $formats) )

{

  $format = $formats[0];

  $formatclass = "format_$format";

  $formatter = new $formatclass();

  $formatter->send_headers();

  die_in_output_format('Invalid output format specified.');

}

$formatclass = "format_$format";

$formatter = new $formatclass();

$formatter->send_headers();

if ( !isset($_GET['action']) )

  die_in_output_format('Please specify action on GET.');

switch($_GET['action'])

{

  case 'get_activity':

    $minutes = isset($_GET['minutes']) ? intval($_GET['minutes']) : 10;

    if ( $minutes < 1 )

      die_in_output_format('minutes < 1');

    $datum = stats_activity_percent($channel, $minutes);

    $count = stats_message_count($channel, $minutes);

    foreach ( $datum as &$pct )

    {

      $pct = $pct * $count;

    }

    $output = array(

        'result' => 'success',

        'minutes' => $minutes,

        'message_count' => $count,

        'active_users' => $datum

      );

    $result = $formatter->encode($output);

    if ( $format == 'xml' )

    {

      $activeusers = '<activeusers>';

      foreach ( $datum as $nick => $count )

      {

        $activeusers .= '<user nick="' . htmlspecialchars($nick) . '" count="' . $count . '" />';

      }

      $activeusers .= '</activeusers>';

      $result = preg_replace('#<activeusers>(.*?)</activeusers>#', $activeusers, $result);

    }

    echo $result;

    break;

}

/** FUNCTIONS **/

function die_in_output_format($message)

{

  global $formatter;

  echo $formatter->encode(array(

      'result' => 'error',

      'error' => $message

    ));

  exit;

}

/** FORMATS **/

class format_json

{

  public function encode($data)

  {

    require_once('../libjson.php');

    return eb_json_encode($data);

  }

  public function send_headers()

  {

    header('Content-type: text/javascript');

  }

}

/**

 * From <http://snipplr.com/view/3491/convert-php-array-to-xml-or-simple-xml-object-if-you-wish/>.

 */

class format_xml

{

	/**

	 * The main function for converting to an XML document.

	 * Pass in a multi dimensional array and this recrusively loops through and builds up an XML document.

	 *

	 * @param array $data

	 * @param string $rootNodeName - what you want the root node to be - defaultsto data.

	 * @param SimpleXMLElement $xml - should only be used recursively

	 * @return string XML

	 */

	public static function toXml($data, $rootNodeName = 'response', $xml = null)

	{

		// turn off compatibility mode as simple xml throws a wobbly if you don't.

		if (ini_get('zend.ze1_compatibility_mode') == 1)

		{

			ini_set ('zend.ze1_compatibility_mode', 0);

		}

		if ($xml == null)

		{

			$xml = simplexml_load_string("<?xml version='1.0' encoding='utf-8'?><$rootNodeName />");

		}

		// loop through the data passed in.

		foreach($data as $key => $value)

		{

			// no numeric keys in our xml please!

			if (is_numeric($key))

			{

				// make string key...

				$key = "unknownNode_". (string) $key;

			}

			// replace anything not alpha numeric

			$key = preg_replace('/[^a-z0-9]/i', '', $key);

			// if there is another array found recrusively call this function

			if (is_array($value))

			{

				$node = $xml->addChild($key);

				// recrusive call.

				format_xml::toXml($value, $rootNodeName, $node);

			}

			else 

			{

				// add single node.

        $value = htmlentities($value);

				$xml->addChild($key,$value);

			}

		}

		// pass back as string. or simple xml object if you want!

		return $xml->asXML();

	}

  public function encode($data)

  {

    return format_xml::toXml($data);

  }

  public function send_headers()

  {

    header('Content-type: text/xml');

  }

}