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<?php |
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namespace Siak\Tontine\Service\Traits; |
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use Illuminate\Support\Collection; |
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use Siak\Tontine\Model\Pool; |
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use Siak\Tontine\Service\Planning\PoolService; |
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use stdClass; |
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use function floor; |
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use function gmp_gcd; |
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trait ReportTrait |
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{ |
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/** |
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* @var PoolService |
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*/ |
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protected PoolService $poolService; |
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/** |
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* @param int $defaultValue |
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* |
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* @return stdClass |
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*/ |
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private function makeFigures(int $defaultValue = 0): stdClass |
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{ |
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$figures = new stdClass(); |
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$figures->cashier = new stdClass(); |
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$figures->cashier->start = $defaultValue; |
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$figures->cashier->recv = $defaultValue; |
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$figures->cashier->end = $defaultValue; |
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$figures->deposit = new stdClass(); |
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$figures->deposit->count = $defaultValue; |
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$figures->deposit->amount = $defaultValue; |
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$figures->remitment = new stdClass(); |
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$figures->remitment->count = $defaultValue; |
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$figures->remitment->amount = $defaultValue; |
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return $figures; |
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} |
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/** |
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* Get the number of subscribers to remit a pool to at a given session |
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* |
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* @param int $sessionCount |
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* @param int $subscriptionCount |
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* @param int $sessionPosition |
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* |
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* @return int |
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*/ |
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public function getRemitmentCount(int $sessionCount, int $subscriptionCount, int $sessionPosition): int |
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{ |
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if($sessionCount === 0 || $subscriptionCount === 0) |
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{ |
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return 0; |
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} |
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// Greatest common divisor |
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$gcd = (int)gmp_gcd($sessionCount, $subscriptionCount); |
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$sessionsInLoop = (int)($sessionCount / $gcd); |
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$positionInLoop = $sessionPosition % $sessionsInLoop; |
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$subscriptionsInLoop = (int)($subscriptionCount / $gcd); |
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$extraSubscriptionsInLoop = $subscriptionsInLoop % $sessionsInLoop; |
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// There's is an extra remitment when the modulo decreases compared to the previous session. |
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$prevModulo = ($positionInLoop * $extraSubscriptionsInLoop) % $sessionsInLoop; |
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if($prevModulo > ($prevModulo + $extraSubscriptionsInLoop) % $sessionsInLoop) |
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{ |
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return (int)floor($subscriptionCount / $sessionCount) + 1; |
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} |
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return (int)floor($subscriptionCount / $sessionCount); |
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} |
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/** |
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* Get the payables of a given pool. |
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* |
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* @param Pool $pool |
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* @param array $with |
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* |
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* @return Collection |
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*/ |
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private function getActiveSessions(Pool $pool, array $with = []): Collection |
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{ |
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// Keep only the subscriptions of the current pool. |
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$with['payables'] = fn($qp) => $qp |
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->whereHas('subscription', fn($qs) => $qs->where('pool_id', $pool->id)); |
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return $this->poolService->getActiveSessions($pool)->load($with); |
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} |
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/** |
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* @param Pool $pool |
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* @param Collection $sessions |
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* |
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* @return array |
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*/ |
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private function getExpectedFigures(Pool $pool, Collection $sessions): array |
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{ |
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$depositCount = $pool->subscriptions()->count(); |
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$sessionCount = $sessions->count(); |
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$subscriptionCount = $depositCount; |
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$depositAmount = $pool->amount * $depositCount; |
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$remitmentAmount = $pool->amount * $sessionCount; |
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$position = 0; |
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$cashier = 0; |
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$expectedFigures = []; |
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foreach($sessions as $session) |
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{ |
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$figures = $this->makeFigures(0); |
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$figures->cashier->start = $cashier; |
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$figures->cashier->recv = $cashier + $depositAmount; |
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$figures->deposit->count = $depositCount; |
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$figures->deposit->amount = $depositAmount; |
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$figures->remitment->count = !$pool->deposit_fixed ? 1 : |
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$this->getRemitmentCount($sessionCount, $subscriptionCount, $position++); |
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$figures->remitment->amount = $remitmentAmount * $figures->remitment->count; |
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$figures->cashier->end = $cashier + $depositAmount - $figures->remitment->amount; |
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$cashier = $figures->cashier->end; |
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$expectedFigures[$session->id] = $figures; |
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} |
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return $expectedFigures; |
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} |
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} |
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lagdo /
tontine
