public function download_solution($task_set_id, $file)
{
if ($this->usermanager->is_student_session_valid() && !Restriction::check_restriction_for_ip_address() || $this->usermanager->is_teacher_session_valid()) {
$task_set = new Task_set();
$task_set->get_by_id(intval($task_set_id));
if ($task_set->exists()) {
$filename = decode_from_url($file);
$file_info = $task_set->get_specific_file_info($filename);
if ($file_info !== FALSE) {
$allow_download = TRUE;
if (!$this->usermanager->is_teacher_session_valid()) {
$solution_version = new Solution_version();
$solution_version->where('version', $file_info['version']);
$solution_version->where_related('solution/task_set', 'id', $task_set_id);
$solution_version->get();
if ($solution_version->exists()) {
if ((bool) $solution_version->download_lock) {
$allow_download = FALSE;
}
}
}
if ($allow_download) {
$log = new Log();
if (!$this->usermanager->is_teacher_session_valid()) {
$log->add_student_solution_download_log($this->lang->line('tasks_log_message_student_solution_download'), $this->usermanager->get_student_id(), $filename, $task_set->id);
}
$filename = $file_info['file_name'] . '_' . $file_info['version'] . '.zip';
$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mime_type = finfo_file($finfo, $file_info['filepath']);
finfo_close($finfo);
header('Content-Description: File Transfer');
header('Content-Type: ' . $mime_type);
header('Content-Disposition: attachment; filename=' . $filename);
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file_info['filepath']));
ob_clean();
flush();
$f = fopen($file_info['filepath'], 'r');
while (!feof($f)) {
echo fread($f, 1024);
}
fclose($f);
exit;
} else {
$this->parser->parse('frontend/tasks/download_solution.tpl', array('version_download_disabled' => TRUE));
}
} else {
$this->output->set_status_header(404, 'Not found');
}
} else {
$this->output->set_status_header(404, 'Not found');
}
} else {
$this->parser->parse('frontend/tasks/download_solution.tpl');
}
}
public function get_solution_version_metadata($task_set_id, $solution_id, $solution_file)
{
$task_set = new Task_set();
$task_set->where_related('solution', 'id', $solution_id);
$task_set->include_related('solution/student', 'id');
$task_set->get_by_id($task_set_id);
if ($task_set->exists()) {
$file_name = decode_from_url($solution_file);
$file_info = $task_set->get_specific_file_info($file_name);
$this->parser->assign('file_last_modified', $file_info['last_modified']);
$solution_version = new Solution_version();
$solution_version->where('version', $file_info['version']);
$solution_version->where_related('solution', 'id', $solution_id);
$solution_version->get();
if (!$solution_version->exists()) {
$solution_version = new Solution_version();
$solution_version->version = (int) $file_info['version'];
$solution_version->solution_id = (int) $solution_id;
$solution_version->save();
}
//$solution_version->check_last_query();
$this->parser->assign('solution_version', $solution_version);
$this->parser->assign('task_set', $task_set);
}
$this->parser->parse('backend/solutions/version_metadata.tpl');
}
public function task($task_set_id_url = NULL, $task_id_url = NULL)
{
$this->_add_mathjax();
$task_set_id = url_get_id($task_set_id_url);
$task_id = url_get_id($task_id_url);
$this->_initialize_student_menu();
$this->_select_student_menu_pagetag('projects');
$this->parser->add_css_file('frontend_projects.css');
$this->parser->add_js_file('projects/task.js');
$this->_add_prettify();
$this->_add_jquery_countdown();
$this->parser->assign('max_filesize', compute_size_with_unit(intval($this->config->item('maximum_solition_filesize') * 1024)));
$cache_id = $this->usermanager->get_student_cache_id('task_set_' . $task_set_id . '|task_' . $task_id);
if (!$this->_is_cache_enabled() || !$this->parser->isCached($this->parser->find_view('frontend/projects/task.tpl'), $cache_id)) {
$project_all = $this->get_task_set($task_set_id, $course, $student);
$project = $this->filter_valid_task_sets($project_all);
if ($course->exists()) {
$this->lang->init_overlays('task_sets', $project, array('name'));
$project = count($project) == 1 ? $project[0] : new Task_set();
$this->parser->assign('project', $project);
$task = $project->task;
$task->include_join_fields()->order_by('`task_task_set_rel`.`sorting`', 'asc');
$task->get_by_id($task_id);
$project_selection = new Project_selection();
$project_selection->where('task_set_id', $project->id);
$project_selection->where('student_id', $this->usermanager->get_student_id());
$project_selection->where('task_id', $task->id);
$project_selection->get();
$students = new Student();
$students->where_related('project_selection', 'task_set_id', $project->id);
$students->where_related('project_selection', 'task_id', $task->id);
$students->get_iterated();
$solution_versions = new Solution_version();
$solution_versions->where_related('solution/task_set', 'id', $task_set_id);
$solution_versions->where_related('solution', 'student_id', $this->usermanager->get_student_id());
$query = $solution_versions->get_raw();
$versions_metadata = array();
if ($query->num_rows()) {
foreach ($query->result() as $row) {
$versions_metadata[$row->version] = clone $row;
}
}
$query->free_result();
$this->parser->assign('task', $task);
$this->parser->assign('students', $students);
$this->parser->assign('project_selection', $project_selection);
$this->parser->assign('solution_files', $project->get_student_files($student->id));
$this->parser->assign('versions_metadata', $versions_metadata);
}
$this->parser->assign(array('course' => $course));
}
$this->parser->parse('frontend/projects/task.tpl', array(), FALSE, $this->_is_cache_enabled(), $cache_id);
}
