function show_image(image,width,height) {
		width = parseInt(width) + 20;
		height = parseInt(height) + 20;
		window_x = window.open(image,\'windowX\',\'width=\'+ width + \', height=\'+ height + \'\');
	}
';
$htmlHeadXtra[] = '';
$htmlHeadXtra[] = '';
$htmlHeadXtra[] = ' ';
$htmlHeadXtra[] = '';
if ($_GET['chatid'] != '') {
	//send out call request
	$time = time();
	$time = date("Y-m-d H:i:s", $time);
	$chatid = addslashes($_GET['chatid']);
	if ($_GET['chatid'] == strval(intval($_GET['chatid']))) {
		$sql = "update $track_user_table set chatcall_user_id = '".Database::escape_string($_user['user_id'])."', chatcall_date = '".Database::escape_string($time)."', chatcall_text = '' where (user_id = ".(int)Database::escape_string($chatid).")";
		$result = Database::query($sql, __FILE__, __LINE__);
		//redirect caller to chat
		header("Location: ".$_configuration['code_append']."chat/chat.php?".api_get_cidreq()."&origin=whoisonline&target=".Security::remove_XSS($chatid));
		exit;
	}
}
/**
 * Displays a sortable table with the list of online users.
 * @param array $user_list
 */
function display_user_list($user_list, $_plugins) {
	global $charset;
	if ($_GET['id'] == '') {
		$extra_params = array();
		$course_url = '';
		if (strlen($_GET['cidReq']) > 0) {
			$extra_params['cidReq'] = Security::remove_XSS($_GET['cidReq']);
			$course_url = '&cidReq='.Security::remove_XSS($_GET['cidReq']);
		}
		foreach ($user_list as $user) {
			$uid = $user[0];
			$user_info = api_get_user_info($uid);
			$table_row = array();
			$url = '?id='.$uid.$course_url;
			$image_array = UserManager::get_user_picture_path_by_id($uid, 'system', false, true);
			$friends_profile = UserFriend::get_picture_user($uid, $image_array['file'], 92, 'medium_', ' width="90" height="90" ');
			// reduce image
			$table_row[] = '
 ';
			$table_row[] = ''.api_get_person_name($user_info['firstName'], $user_info['lastName']).' ';
			//$table_row[] = ''.$user_info['lastName'].' ';
			if (api_get_setting('show_email_addresses') == 'true') {
				$table_row[] = Display::encrypted_mailto_link($user_info['mail']);
			}
			$user_anonymous = api_get_anonymous_id();
			if (api_get_setting('allow_social_tool') == 'true' && api_get_user_id() <> $user_anonymous && api_get_user_id() <> 0) {
				if ($user_info['user_id'] != api_get_user_id() && !api_is_anonymous($user_info['user_id'])) {
					$user_relation = UserFriend::get_relation_between_contacts(api_get_user_id(), $user_info['user_id']);
					if ($user_relation == 0 || $user_relation == 6) {
						$table_row[] = ''.Display :: return_icon('add_multiple_users.gif', get_lang('SocialInvitationToFriends')).' '.get_lang('SendInvitation').'  
										'.Display :: return_icon('mail_send.png', get_lang('SendAMessage')).' '.get_lang('SendAMessage').' ';
					} else {
						$table_row[] = ''.Display :: return_icon('mail_send.png', get_lang('SendAMessage')).' '.get_lang('SendAMessage').' ';
					}
				}
			}
			$table_data[] = $table_row;
		}
		$table_header[] = array(get_lang('UserPicture'), false, 'width="90"');
		$table_header[] = array(get_lang('Name'), true);
		//$table_header[] = array(get_lang('LastName'), true);
		if (api_get_setting('show_email_addresses') == 'true') {
			$table_header[] = array(get_lang('Email'), true);
		}
		$user_anonymous = api_get_anonymous_id();
		if (api_get_setting('allow_social_tool') == 'true' && api_get_user_id() <> $user_anonymous && api_get_user_id() <> 0) {
			$table_header[] = array(get_lang('Friends'), false, 'width="200"');
		}
		/*this feature is deprecated
		if (api_get_setting('allow_message_tool') == 'true' && isset($_SESSION['_user'])) {
			$table_header[] = array(get_lang('SendMessage'), true);
		}
		*/
		$sorting_options['column'] = (isset($_GET['column']) ? (int)$_GET['column'] : 2);
		/*if (api_get_setting('allow_social_tool') == 'true' && api_get_setting('allow_message_tool') == 'true') {
			//send_invitation_friend_user();
			echo '
';
			echo '';
		}*/
	}
}
/**
 * Displays the information of an individual user
 * @param int $user_id
 */
function display_individual_user($user_id) {
	global $interbreadcrumb;
	$safe_user_id = Database::escape_string($user_id);
	// to prevent a hacking attempt: http://www.dokeos.com/forum/viewtopic.php?t=5363
	$user_table = Database::get_main_table(TABLE_MAIN_USER);
	$sql = "SELECT * FROM $user_table WHERE user_id='".$safe_user_id."'";
	$result = Database::query($sql, __FILE__, __LINE__);
	if (Database::num_rows($result) == 1) {
		$user_object = Database::fetch_object($result);
		$name = GetFullUserName($user_id).($_SESSION['_uid'] == $user_id ? ' ('.get_lang('Me').') ' : '' );
		$alt = GetFullUserName($user_id).($_SESSION['_uid'] == $user_id ? ' ('.get_lang('Me').')' : '');
		$status = ($user_object->status == COURSEMANAGER ? get_lang('Teacher') : get_lang('Student'));
		$interbreadcrumb[] = array('url' => 'whoisonline.php', 'name' => get_lang('UsersOnLineList'));
		Display::display_header($alt);
		echo '';
		echo $alt;
		echo '
 ';
		echo '';
		if (strlen(trim($user_object->picture_uri)) > 0) {
			$sysdir_array = UserManager::get_user_picture_path_by_id($safe_user_id, 'system');
			$sysdir = $sysdir_array['dir'];
			$webdir_array = UserManager::get_user_picture_path_by_id($safe_user_id, 'web');
			$webdir = $webdir_array['dir'];
			$fullurl = $webdir.$user_object->picture_uri;
			$system_image_path = $sysdir.$user_object->picture_uri;
			list($width, $height, $type, $attr) = @getimagesize($system_image_path);
			$resizing = (($height > 200) ? 'height="200"' : '');
			$height += 30;
			$width += 30;
			$window_name = 'window'.uniqid('');
			// get the path,width and height from original picture
			$big_image = $webdir.'big_'.$user_object->picture_uri;
			$big_image_size = api_getimagesize($big_image);
			$big_image_width = $big_image_size[0];
			$big_image_height = $big_image_size[1];
			$url_big_image = $big_image.'?rnd='.time();
			echo '
';
			global $user_anonymous;
			if (api_get_setting('allow_social_tool') == 'true' && api_get_user_id() <> $user_anonymous && api_get_user_id() <> 0) {
				echo '
';
				echo '
'.get_lang('ViewSharedProfile').' ';
				echo '
';
			}
		} else {
			echo Display::return_icon('unknown.jpg', get_lang('Unknown'));
			echo '
';
		}
		if (api_get_setting('show_email_addresses') == 'true') {
			echo Display::encrypted_mailto_link($user_object->email,$user_object->email).'
';
		}
		echo $status.'
';
		echo '
 ';
		if ($user_object->competences) {
			echo ''.get_lang('MyCompetences').' 
 ';
			echo ''.$user_object->competences.' ';
		}
		if ($user_object->diplomas) {
			echo ''.get_lang('MyDiplomas').' 
 ';
			echo ''.$user_object->diplomas.' ';
		}
		if ($user_object->teach) {
			echo ''.get_lang('MyTeach').' 
 ';
			echo ''.$user_object->teach.' ';;
		}
		display_productions($user_object->user_id);
		if ($user_object->openarea) {
			echo ''.get_lang('MyPersonalOpenArea').' 
 ';
			echo ''.$user_object->openarea.' ';
		}
	}
	else
	{
		Display::display_header(get_lang('UsersOnLineList'));
		echo '';
		echo get_lang('UsersOnLineList');
		echo '
';
	}
}
/**
 * Display productions in whoisonline
 * @param int $user_id User id
 * @todo use the correct api_get_path instead of $clarolineRepositoryWeb
 */
function display_productions($user_id) {
	$sysdir_array = UserManager::get_user_picture_path_by_id($user_id, 'system', true);
	$sysdir = $sysdir_array['dir'].$user_id.'/';
	$webdir_array = UserManager::get_user_picture_path_by_id($user_id, 'web', true);
	$webdir = $webdir_array['dir'].$user_id.'/';
	if (!is_dir($sysdir)) {
		mkpath($sysdir);
	}
	/*
	$handle = opendir($sysdir);
	$productions = array();
	while ($file = readdir($handle)) {
		if ($file == '.' || $file == '..' || $file == '.htaccess') {
			continue;						// Skip current and parent directories
		}
		if (preg_match('/('.$user_id.'|[0-9a-f]{13}|saved)_.+\.(png|jpg|jpeg|gif)$/i', $file)) {
			// User's photos should not be listed as productions.
			continue;
		}
		$productions[] = $file;
	}
	*/
	$productions = UserManager::get_user_productions($user_id);
	if (count($productions) > 0) {
		echo ''.get_lang('Productions').'  ';
		echo '';
		foreach ($productions as $index => $file) {
			// Only display direct file links to avoid browsing an empty directory
			if (is_file($sysdir.$file) && $file != $webdir_array['file']) {
				echo ''.$file.'  ';
			}
			// Real productions are under a subdirectory by the User's id
			if (is_dir($sysdir.$file)) {
				$subs = scandir($sysdir.$file);
				foreach ($subs as $my => $sub) {
					if (substr($sub, 0, 1) != '.' && is_file($sysdir.$file.'/'.$sub)) {
						echo ''.$sub.'  ';
					}
				}
			}
		}
		echo '  ';
	}
}
// This if statement prevents users accessing the who's online feature when it has been disabled.
if ((api_get_setting('showonline', 'world') == 'true' && !$_user['user_id']) || ((api_get_setting('showonline', 'users') == 'true' || api_get_setting('showonline', 'course') == 'true') && $_user['user_id'])) {
	if(isset($_GET['cidReq']) && strlen($_GET['cidReq']) > 0) {
		$user_list = Who_is_online_in_this_course($_user['user_id'], api_get_setting('time_limit_whosonline'), $_GET['cidReq']);
	} else {
		$user_list = WhoIsOnline($_user['user_id'], $_configuration['statistics_database'], api_get_setting('time_limit_whosonline'));
	}
	$total = count($user_list);
	if (!isset($_GET['id'])) {
		Display::display_header(get_lang('UsersOnLineList'));
		echo '';
		echo get_lang('UsersOnLineList');
		echo '
';
		echo ''.get_lang('TotalOnLine').' : '.$total.'
';
		if ($_GET['id'] == '') {
			echo ''.get_lang('Refresh').' 
';
		} else {
			if (0) {
			// if ($_user['user_id'] && $_GET["id"] != $_user['user_id']) {
				echo ''.get_lang('SendChatRequest').' ';
			}
		}
	}
	if ($user_list) {
		if (!isset($_GET['id'])) {
			display_user_list($user_list, $_plugins);
		} else {
			//individual user information - also displays header info
			display_individual_user(Security::remove_XSS($_GET['id']));
		}
	}
	elseif (isset($_GET['id'])) {
		Display::display_header(get_lang('UsersOnLineList'));
		echo '';
		echo get_lang('UsersOnLineList');
		echo '
';
	}
} else {
	Display::display_header(get_lang('UsersOnLineList'));
	Display::display_error_message(get_lang('AccessNotAllowed'));
}
$referer = empty($_GET['referer']) ? 'index.php' : api_htmlentities(strip_tags($_GET['referer']), ENT_QUOTES);
if (isset($_GET['id'])) {
	echo ''.get_lang('Back').' ';
} else {
	echo ''.get_lang('BackHome').' ';
}
/*
==============================================================================
		FOOTER
==============================================================================
*/
/*echo '';*/
Display::display_footer();