public function get_next_solution($task_set_id, $solution_id)
{
$this->_transaction_isolation();
$this->db->trans_begin();
$output = new stdClass();
$output->have_next = FALSE;
$output->next_id = NULL;
$output->error_message = '';
$current_solution = new Solution();
$current_solution->where('task_set_id', $task_set_id);
$current_solution->get_by_id($solution_id);
if ($current_solution->revalidate == 0) {
$additional = $this->uri->ruri_to_assoc(5);
$solution = new Solution();
$solution->where('task_set_id', $task_set_id);
$solution->where('revalidate', 1);
if (isset($additional['group_id'])) {
$solution->where_related('student/participant/group', 'id', (int) $additional['group_id']);
}
$solution->limit(1);
$solution->get();
if ($solution->exists()) {
$output->have_next = TRUE;
$output->next_id = $solution->id;
} else {
$output->error_message = $this->lang->line('admin_solutions_valuation_next_solution_message_no_more_solution_to_valuate');
}
} else {
$output->error_message = $this->lang->line('admin_solutions_valuation_next_solution_message_this_solution_is_not_valuated');
}
$this->db->trans_rollback();
$this->output->set_content_type('application/json');
$this->output->set_output(json_encode($output));
}
