/**
* Get a random combination by competition
* which the currently logged in competitor has not rated on
*
* @param Competition $competition
* @param Session $session
* @param Competitor $competitor
*
* @return Combination
*/
public function getRandomCombinationByCompetition(Competition $competition, Session $session, $competitor)
{
$combination = null;
$amount = 1;
$competitionId = $competition->getId();
$combinationSession = $session->get('hotornot-combinations');
if (empty($combinationSession)) {
$combinationSession = [];
}
$competitorId = 0;
if ($competitor instanceof Competitor && $competitor->hasRole('ROLE_OAUTH_USER')) {
$competitorId = $competitor->getId();
}
// get all the combinations the current user has not voted on
$possibleCombinations = $this->getUnratedCombinationIds($competitionId, $competitorId);
if (!empty($possibleCombinations)) {
// check if the session contains an entry
// with the last combination and display it
if (array_key_exists($competitionId, $combinationSession)) {
$combinationData = $combinationSession[$competitionId];
if (in_array($combinationData['id'], $possibleCombinations)) {
$combination = $this->getCombinationById($combinationData['id']);
return $combination;
}
}
// randomly select one entry from possible combinations
$combinationId = $possibleCombinations[array_rand($possibleCombinations)];
// get the combination
$combination = $this->getCombinationById($combinationId);
}
if (empty($combination)) {
// unset last displayed combination
unset($combinationSession[$competitionId]);
} else {
// set the last displayed combination
$combinationSession[$competitionId] = ['id' => $combination->getId(), 'reversed' => 1 === rand(0, 1)];
}
// update the session
$session->set('hotornot-combinations', $combinationSession);
return $combination;
}