function perform($edit, $datestamp)
{
$dataInvalid = $this->isDataInvalid($edit);
if ($dataInvalid) {
error_exit($dataInvalid . "<br>Please use your back button to return to the form, fix these errors, and try again");
}
for ($i = 0; $i < $edit['repeat_for']; $i++) {
$slot = new GameSlot();
$slot->set('fid', $this->field->fid);
$slot->set('game_date', strftime("%Y-%m-%d", $datestamp));
$slot->set('game_start', $edit['start_time']);
if ($edit['end_time'] != '---') {
$slot->set('game_end', $edit['end_time']);
}
foreach ($edit['availability'] as $league_id) {
$slot->add_league($league_id);
}
if (!$slot->save()) {
// if we fail, bail
return false;
}
$datestamp += 7 * 24 * 60 * 60;
// advance by a week
}
return true;
}