protected function cheating_core($from_secord, $to_secord)
{
#$period_secord > 3600s, 1h.
#$stepNum for now 60, never > 100.
#so, $step_secord > 36s.
$stepNum = Variables::getStepNum();
$period_secord = $from_secord - $to_secord;
$step_secord = (int) ($period_secord / $stepNum);
$now = time();
#_tp means time point.
$beforebefore_tp = $now - $from_secord;
$before_tp = $now - $to_secord;
$res = Variables::chartjs_line_four_inited_with_time($beforebefore_tp, $step_secord, $stepNum, 'try', 'fine', 'cheating', 'other');
$tasks = Task::period3($beforebefore_tp, $before_tp, 4);
$cheatings = array();
foreach ($tasks as $tk) {
#$task_tp = $tk['time'];
#$task_code = $tk['code'];
#$task_zid = $tk['zid'];
$task_tp = $tk->time;
$task_code = $tk->code;
$task_zid = $tk->zid;
$i = (int) (($task_tp - $beforebefore_tp) / $step_secord);
if ($i == $stepNum) {
$i -= 1;
}
if ($task_code == -1) {
$res['datasets'][0]['data'][$i] += 1;
} elseif ($task_code == 0) {
$res['datasets'][1]['data'][$i] += 1;
} elseif ($task_code == 1) {
$res['datasets'][2]['data'][$i] += 1;
$cheatings[] = $task_zid;
} else {
$res['datasets'][3]['data'][$i] += 1;
}
}
$res = json_encode($res);
$url = action('TaskController@ccstep', ['']);
return compact('res', 'from_secord', 'to_secord', 'url', 'cheatings');
}
