$challenge = new Challenge(array('year' => Year::current(), 'name' => $challenge_name, 'points' => $challenge_points, 'code' => $challenge_code));
$challenge->doAdd("Created challenge {$challenge_name} successfully.");
break;
case 'delete':
$challenge = Challenge::getChallenge($challenge_id);
foreach ($challenge->getWinners() as $winner) {
$winner->doRemove();
}
$challenge->doRemove("Deleted challenge successfully.");
break;
case 'add':
$winner = new ChallengeWinner(array('team' => $team_id, 'challenge' => $challenge_id));
$winner->doAdd("Added challenge winner successfully.");
break;
case 'remove':
$winner = ChallengeWinner::getChallengeWinner($winner_id);
$winner->doRemove("Deleted challenge winner successfully.");
break;
case 'claim':
$team = Session::currentTeam();
$challenge = Challenge::getChallengeByCode($code);
if (!$team) {
add_notification('You cannot claim a challenge if you have no team.');
} else {
if (!$challenge) {
add_notification('No challenge with this code found. If you think you received this message in error, bring your code to a coordinator in person.');
} else {
if ($challenge->getWinners()) {
add_notification('Someone else has already claimed the code you entered.');
} else {
$winner = new ChallengeWinner(array('team' => $team->getID(), 'challenge' => $challenge->getID()));
