/**
* @param Pool $pool
*
* @return array|bool
*/
private function shuffleTillMatch(Pool $pool)
{
$timeToStop = microtime(true) + self::SHUFFLE_TIME_LIMIT;
$entries = $pool->getEntries()->getValues();
while (microtime(true) < $timeToStop) {
$set = $this->shuffleArray($entries);
if ($this->checkValidMatch($entries, $set)) {
$this->matchedExcludes = $set;
return $set;
}
}
return false;
}
/**
* @param Pool $pool
* @return array|bool
*/
private function permutateTillMatch(Pool $pool)
{
$entries = $pool->getEntries()->getValues();
$set = $this->shuffleArray($entries);
$size = count($set) - 1;
$perm = range(0, $size);
do {
$shuffled = array();
foreach ($perm as $i) {
$shuffled[] = $set[$i];
}
if ($this->checkValidMatch($entries, $shuffled)) {
return $shuffled;
}
} while ($perm = $this->nextPermutation($perm, $size));
return false;
}
