55 lines
1.8 KiB
PHP
55 lines
1.8 KiB
PHP
<?php
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namespace Bazaar\Services;
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use Bazaar\Repositories\CouponRepository;
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final class CouponService
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{
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public function __construct(private readonly CouponRepository $coupons)
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{
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}
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public function evaluate(string $code, int $subtotalCents, ?string $now = null): CouponResult
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{
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$coupon = $this->coupons->findByCode($code);
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if ($coupon === null) {
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return CouponResult::fail(CouponResult::notFound);
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}
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$now ??= gmdate('c');
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if ((int) $coupon['isActive'] !== 1) {
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return CouponResult::fail(CouponResult::inactive, $coupon);
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}
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if ($coupon['startsAt'] !== null && $coupon['startsAt'] !== '' && $now < $coupon['startsAt']) {
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return CouponResult::fail(CouponResult::notStarted, $coupon);
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}
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if ($coupon['expiresAt'] !== null && $coupon['expiresAt'] !== '' && $now > $coupon['expiresAt']) {
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return CouponResult::fail(CouponResult::expired, $coupon);
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}
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if ($coupon['maxRedemptions'] !== null && (int) $coupon['redeemedCount'] >= (int) $coupon['maxRedemptions']) {
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return CouponResult::fail(CouponResult::exhausted, $coupon);
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}
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if ($subtotalCents < (int) $coupon['minSubtotalCents']) {
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return CouponResult::fail(CouponResult::belowMinimum, $coupon);
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}
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return CouponResult::ok($coupon, $this->discountFor($coupon, $subtotalCents));
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}
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public function discountFor(array $coupon, int $subtotalCents): int
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{
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$discount = $coupon['type'] === 'percent'
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? (int) floor($subtotalCents * (int) $coupon['value'] / 100)
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: (int) $coupon['value'];
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return max(0, min($discount, $subtotalCents));
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}
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public function redeem(int $couponId): void
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{
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$this->coupons->recordRedemption($couponId);
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}
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}
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