public static function RefreshScoreboardCache($contest_id)
{
try {
$contest = ContestsDAO::getByPK($contest_id);
$contest_runs = RunsDAO::GetContestRuns($contest_id);
// Get all distinct contestants participating in the contest given contest_id
$raw_contest_users = RunsDAO::GetAllRelevantUsers($contest_id, true, null);
// Get all problems given contest_id
$raw_contest_problems = ContestProblemsDAO::GetRelevantProblems($contest_id);
} catch (Exception $e) {
throw new InvalidDatabaseOperationException($e);
}
$problem_mapping = array();
$order = 0;
foreach ($raw_contest_problems as $problem) {
$problem_mapping[$problem->problem_id] = array('order' => $order++, 'alias' => $problem->alias);
}
$scoreboardLimit = Scoreboard::getScoreboardTimeLimitUnixTimestamp($contest);
// Cache scoreboard until the contest ends (or forever if it has already ended).
$timeout = max(0, strtotime($contest->getFinishTime()) - time());
$contestantScoreboardCache = new Cache(Cache::CONTESTANT_SCOREBOARD_PREFIX, $contest_id);
$contestantScoreboard = Scoreboard::getScoreboardFromRuns($contest_runs, $raw_contest_users, $problem_mapping, $contest->getPenalty(), $scoreboardLimit, $contest, false, false);
$contestantScoreboardCache->set($contestantScoreboard, $timeout);
$adminScoreboardCache = new Cache(Cache::ADMIN_SCOREBOARD_PREFIX, $contest_id);
$scoreboardLimit = Scoreboard::getScoreboardTimeLimitUnixTimestamp($contest, true);
$adminScoreboard = Scoreboard::getScoreboardFromRuns($contest_runs, $raw_contest_users, $problem_mapping, $contest->getPenalty(), $scoreboardLimit, $contest, true, false);
$adminScoreboardCache->set($adminScoreboard, $timeout);
$contestantEventCache = new Cache(Cache::CONTESTANT_SCOREBOARD_EVENTS_PREFIX, $contest_id);
$contestantEventCache->set(Scoreboard::calculateEvents($contest, $contest_runs, $raw_contest_users, $problem_mapping, false), $timeout);
$adminEventCache = new Cache(Cache::ADMIN_SCOREBOARD_EVENTS_PREFIX, $contest_id);
$adminEventCache->set(Scoreboard::calculateEvents($contest, $contest_runs, $raw_contest_users, $problem_mapping, true), $timeout);
// Try to broadcast the updated scoreboards:
$log = Logger::getLogger('Scoreboard');
try {
$grader = new Grader();
$log->debug('Sending updated scoreboards');
$grader->broadcast($contest->alias, json_encode(array('message' => '/scoreboard/update/', 'scoreboard' => $adminScoreboard)), false, -1, false);
$grader->broadcast($contest->alias, json_encode(array('message' => '/scoreboard/update/', 'scoreboard' => $contestantScoreboard)), true, -1, true);
} catch (Exception $e) {
$log->error('Error broadcasting scoreboard: ' . $e);
}
}
