*/
use CpChart\Chart\Cache as pCache;
use CpChart\Chart\Data as pData;
use CpChart\Chart\Image as pImage;
/**
* This class is used like controller for student graph block plugin,
* the class name must be registered inside path.info file (e.g: controller = "BlockStudentGraph"), so dashboard controller will be instantiate it
* @package chamilo.dashboard
*/
class BlockStudentGraph extends Block
{
private $user_id;
private $students;
private $path;
private $permission = array(DRH);
/**
* Constructor
*/
public function __construct ($user_id)
{
$this->user_id = $user_id;
$this->path = 'block_student_graph';
if ($this->is_block_visible_for_user($user_id)) {
/*if (api_is_platform_admin()) {
$this->students = UserManager::get_user_list(array('status' => STUDENT));
} else if (api_is_drh()) {*/
$this->students = UserManager::get_users_followed_by_drh($user_id, STUDENT);
//}
}
}
/**
* 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 students
* and its position for showing it inside dashboard interface
* it's important to use the name 'get_block' for being used from dashboard controller
* @return array column and content html
*/
public function get_block()
{
global $charset;
$column = 1;
$data = array();
$students_attendance_graph = $this->get_students_attendance_graph();
$html = '