<?php
/**
 * This file is part of session block plugin for dashboard,
 * it should be required inside dashboard controller for showing it into dashboard interface from plattform
 * @package chamilo.dashboard
 * @author Christian Fasanando
 */

/**
 * This class is used like controller for this session block plugin,
 * the class name must be registered inside path.info file
 * (e.g: controller = "BlockSession"), so dashboard controller will be instantiate it
 * @package chamilo.dashboard
 */
class BlockSession extends Block
{
    private $user_id;
	private $sessions;
	private $path;
	private $permission = array(DRH, SESSIONADMIN);

	/**
	 * Constructor
	 */
    public function __construct ($user_id)
    {
    	$this->user_id 	= $user_id;
    	$this->path = 'block_session';
    	if ($this->is_block_visible_for_user($user_id)) {
            $this->sessions = SessionManager::get_sessions_followed_by_drh($user_id);
    	}
    }

	/**
	 * This method check if a user is allowed to see the block inside dashboard interface
	 * @param	int		User id
	 * @return	bool	Is block visible for user
	 */
    public function is_block_visible_for_user($user_id)
    {
    	$user_info = api_get_user_info($user_id);
		$user_status = $user_info['status'];
		$is_block_visible_for_user = false;
    	if (UserManager::is_admin($user_id) || in_array($user_status, $this->permission)) {
    		$is_block_visible_for_user = true;
    	}
    	return $is_block_visible_for_user;
    }

    /**
     * This method return content html containing information about sessions and its position for showing it inside dashboard interface
     * it's important to use the name 'get_block' for beeing used from dashboard controller
     * @return array   column and content html
     */
    public function get_block()
    {

		global $charset;

    	$column = 2;
    	$data   = array();

		$content = $this->get_content_html();

		$content_html = '
			            <div class="panel panel-default" id="intro">
			                <div class="panel-heading">
			                    '.get_lang('SessionsInformation').'
			                    <div class="pull-right"><a class="btn btn-danger btn-xs" onclick="javascript:if(!confirm(\''.addslashes(api_htmlentities(get_lang('ConfirmYourChoice'),ENT_QUOTES,$charset)).'\')) return false;" href="index.php?action=disable_block&path='.$this->path.'">
			                    <i class="fa fa-times"></i>
			                    </a></div>
			                </div>
			                <div class="panel-body">
							'.$content.'
			                </div>
			            </div>
				';

    	$data['column'] = $column;
    	$data['content_html'] = $content_html;

    	return $data;
    }

    /**
 	 * This method return a content html, it's used inside get_block method for showing it inside dashboard interface
 	 * @return string  content html
 	 */
    public function get_content_html()
    {

 		$content = '';
		$sessions = $this->sessions;

		//$content = '<div style="margin:10px;">';
		$content .= '<h4>'.get_lang('YourSessionsList').'</h4>';

		if (count($sessions) > 0) {
			$sessions_table = '<table class="data_table" width:"95%">';
 			$sessions_table .= '<tr>
									<th >'.get_lang('Title').'</th>
									<th >'.get_lang('Date').'</th>
									<th width="100px">'.get_lang('NbCoursesPerSession').'</th>
								</tr>';
			$i = 1;
			foreach ($sessions as $session) {

				$session_id = intval($session['id']);
				$title = $session['name'];

				if ($session['access_start_date'] != '0000-00-00 00:00:00' && $session['access_end_date'] != '0000-00-00 00:00:00') {
					$date = get_lang('From').' '.api_convert_and_format_date($session['access_start_date'], DATE_FORMAT_SHORT, date_default_timezone_get()).' '.get_lang('To').' '.api_convert_and_format_date($session['access_end_date'], DATE_FORMAT_SHORT, date_default_timezone_get());
				} else {
					$date = ' - ';
				}

	 			$count_courses_in_session = count(Tracking::get_courses_list_from_session($session_id));

				if ($i%2 == 0) $class_tr = 'row_odd';
	    		else $class_tr = 'row_even';

				$sessions_table .= '<tr class="'.$class_tr.'">
										<td>'.$title.'</td>
										<td align="center">'.$date.'</td>
										<td align="center">'.$count_courses_in_session.'</td>
								   </tr>';
				$i++;
			}
			$sessions_table .= '</table>';
			$content .= $sessions_table;
		} else {
			$content .= get_lang('ThereIsNoInformationAboutYourSessions');
		}

		if (count($sessions) > 0) {
			$content .= '<div style="text-align:right;margin-top:10px;"><a href="'.api_get_path(WEB_CODE_PATH).'mySpace/session.php">'.get_lang('SeeMore').'</a></div>';
		}

		//$content .= '</div>';

 		return $content;
 	}

    /**
	 * Get number of sessions
	 * @return int
	 */
	function get_number_of_sessions()
    {
		return count($this->sessions);
	}

}
