<?php
/* For licensing terms, see /license.txt */
/**
 * Shows who is online in a specific session
 * @package chamilo.main
 */

include_once './main/inc/global.inc.php';
api_block_anonymous_users();

$tbl_session = Database :: get_main_table(TABLE_MAIN_SESSION);
$tbl_session_course = Database :: get_main_table(TABLE_MAIN_SESSION_COURSE);
$tbl_session_course_user = Database :: get_main_table(TABLE_MAIN_SESSION_COURSE_USER);

/**
 * Header
 * include the HTTP, HTML headers plus the top banner
 */

Display::display_header(get_lang('UserOnlineListSession'));
?>
<br /><br />
<table class="data_table" width="60%">
	<tr class="tableName">
		<td colspan="4">
			<strong><?php echo get_lang('UserOnlineListSession'); ?></strong>
		</td>
	</tr>
	<tr>
		<th>
			<?php echo get_lang('Name'); ?>
		</th>
		<th>
			<?php echo get_lang('InCourse'); ?>
		</th>
		<th>
			<?php echo get_lang('Email'); ?>
		</th>
		<th>
			<?php echo get_lang('Chat'); ?>
		</th>
	</tr>
<?php
	$session_is_coach = array();
	if (isset($_user['user_id']) && $_user['user_id'] != '') {
		$_user['user_id'] = intval($_user['user_id']);
		$sql = "SELECT DISTINCT session.id,
					name,
					access_start_date,
					access_end_date
				FROM $tbl_session as session
				INNER JOIN $tbl_session_course_user as srcru
					ON srcru.user_id = ".$_user['user_id']." AND srcru.status=2
					AND session.id = srcru.session_id
				ORDER BY access_start_date, access_end_date, name";
		$result = Database::query($sql);

		while ($session = Database:: fetch_array($result)) {
			$session_is_coach[$session['id']] = $session;
		}

		$sql = "SELECT DISTINCT session.id,
					name,
					access_start_date,
					access_end_date
				FROM $tbl_session as session
				WHERE session.id_coach = ".$_user['user_id']."
				ORDER BY access_start_date, access_end_date, name";
        $result = Database::query($sql);
		while ($session = Database:: fetch_array($result)) {
			$session_is_coach[$session['id']] = $session;
		}

        if (empty($time_limit)) {
            $time_limit = api_get_setting('time_limit_whosonline');
        } else {
            $time_limit = 60;
        }

        $online_time    = time() - $time_limit*60;
        $current_date   = api_get_utc_datetime($online_time);

        $students_online = array();
        foreach ($session_is_coach as $session) {
			$sql = "SELECT DISTINCT last_access.access_user_id,
						last_access.access_date,
						last_access.c_id,
						last_access.access_session_id,
						".(api_is_western_name_order() ? "CONCAT(user.firstname,' ',user.lastname)" : "CONCAT(user.lastname,' ',user.firstname)")." as name,
						user.email
					FROM ".Database::get_main_table(TABLE_STATISTIC_TRACK_E_LASTACCESS)." AS last_access
					INNER JOIN ".Database::get_main_table(TABLE_MAIN_USER)." AS user
						ON user.user_id = last_access.access_user_id
					WHERE access_session_id='".$session['id']."'
					AND access_date >= '$current_date'
					GROUP BY access_user_id";

			$result = Database::query($sql);

			while($user_list = Database::fetch_array($result)) {
				$students_online[$user_list['access_user_id']] = $user_list;
			}
		}

		if (count($students_online) > 0) {
			foreach ($students_online as $student_online) {
				echo "<tr>
						<td>
					";
				echo $student_online['name'];
				echo "	</td>
						<td align='center'>
					 ";
				$courseInfo = api_get_course_info_by_id($student_online['c_id']);
				echo $courseInfo['title'];
				echo "	</td>
						<td align='center'>
					 ";
							 if (!empty($student_online['email'])) {
								echo $student_online['email'];
							 } else {
							 	echo get_lang('NoEmail');
							 }
				echo "	</td>
						<td align='center'>
					 ";
				echo '<a href="main/chat/chat.php?cidReq='.$courseInfo['code'].'&id_session='.$student_online['access_session_id'].'"> -> </a>';
				echo "	</td>
					</tr>
					 ";
			}
		} else {
			echo '	<tr>
						<td colspan="4">
							'.get_lang('NoOnlineStudents').'
						</td>
					</tr>
				 ';
		}
	}
?>
</table>
<?php

Display::display_footer();
