htdocs/extern.php
author Dan
Wed, 31 Dec 2008 21:54:19 -0500
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<?php
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require('../stats-fe.php');
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require('../timezone.php');
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$channel_list = stats_channel_list();
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$first_channel = $channel_list[0];
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$channel = ( isset($_REQUEST['channel']) && in_array($_REQUEST['channel'], $channel_list) ) ? $_REQUEST['channel'] : $first_channel;
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$formats = array('json', 'xml');
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$format = ( isset($_GET['format']) ) ? $_GET['format'] : $formats[0];
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if ( !in_array($format, $formats) )
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{
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  $format = $formats[0];
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  $formatclass = "format_$format";
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  $formatter = new $formatclass();
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  $formatter->send_headers();
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  die_in_output_format('Invalid output format specified.');
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}
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$formatclass = "format_$format";
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$formatter = new $formatclass();
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$formatter->send_headers();
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if ( !isset($_GET['action']) )
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  die_in_output_format('Please specify action on GET.');
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switch($_GET['action'])
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{
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  case 'get_activity':
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    $minutes = isset($_GET['minutes']) ? intval($_GET['minutes']) : 10;
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    if ( $minutes < 1 )
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      die_in_output_format('minutes < 1');
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    $datum = stats_activity_percent($channel, $minutes);
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    $count = stats_message_count($channel, $minutes);
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    foreach ( $datum as &$pct )
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    {
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      $pct = $pct * $count;
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    }
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    $output = array(
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        'result' => 'success',
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        'minutes' => $minutes,
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        'message_count' => $count,
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        'active_users' => $datum
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      );
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    $result = $formatter->encode($output);
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    if ( $format == 'xml' )
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    {
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      $activeusers = '<activeusers>';
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      foreach ( $datum as $nick => $count )
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      {
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        $activeusers .= '<user nick="' . htmlspecialchars($nick) . '" count="' . $count . '" />';
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      }
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      $activeusers .= '</activeusers>';
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      $result = preg_replace('#<activeusers>(.*?)</activeusers>#', $activeusers, $result);
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    }
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    echo $result;
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    break;
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}
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/** FUNCTIONS **/
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function die_in_output_format($message)
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{
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  global $formatter;
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  echo $formatter->encode(array(
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      'result' => 'error',
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      'error' => $message
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    ));
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  exit;
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}
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/** FORMATS **/
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class format_json
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{
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  public function encode($data)
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  {
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    require_once('../libjson.php');
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    return eb_json_encode($data);
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  }
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  public function send_headers()
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  {
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    header('Content-type: text/javascript');
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  }
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}
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/**
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 * From <http://snipplr.com/view/3491/convert-php-array-to-xml-or-simple-xml-object-if-you-wish/>.
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 */
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class format_xml
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{
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	/**
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	 * The main function for converting to an XML document.
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	 * Pass in a multi dimensional array and this recrusively loops through and builds up an XML document.
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	 *
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	 * @param array $data
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	 * @param string $rootNodeName - what you want the root node to be - defaultsto data.
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	 * @param SimpleXMLElement $xml - should only be used recursively
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	 * @return string XML
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	 */
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	public static function toXml($data, $rootNodeName = 'response', $xml = null)
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	{
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		// turn off compatibility mode as simple xml throws a wobbly if you don't.
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		if (ini_get('zend.ze1_compatibility_mode') == 1)
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		{
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			ini_set ('zend.ze1_compatibility_mode', 0);
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		}
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		if ($xml == null)
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		{
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			$xml = simplexml_load_string("<?xml version='1.0' encoding='utf-8'?><$rootNodeName />");
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		}
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		// loop through the data passed in.
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		foreach($data as $key => $value)
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		{
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			// no numeric keys in our xml please!
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			if (is_numeric($key))
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			{
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				// make string key...
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				$key = "unknownNode_". (string) $key;
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			}
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			// replace anything not alpha numeric
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			$key = preg_replace('/[^a-z0-9]/i', '', $key);
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			// if there is another array found recrusively call this function
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			if (is_array($value))
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			{
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				$node = $xml->addChild($key);
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				// recrusive call.
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				format_xml::toXml($value, $rootNodeName, $node);
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			}
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			else 
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			{
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				// add single node.
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        $value = htmlentities($value);
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				$xml->addChild($key,$value);
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			}
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		}
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		// pass back as string. or simple xml object if you want!
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		return $xml->asXML();
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	}
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  public function encode($data)
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  {
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    return format_xml::toXml($data);
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  }
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  public function send_headers()
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  {
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    header('Content-type: text/xml');
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  }
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}