zabudko-ruandClaude Opus 5.5
45d7512d2b
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
27 lines
1.1 KiB
TypeScript
27 lines
1.1 KiB
TypeScript
export interface PromoLike {
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kind: 'AGENCY_GIFT' | 'DISCOUNT';
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active: boolean;
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maxUses: number | null;
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usedCount: number;
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validFrom: Date | null;
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validUntil: Date | null;
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}
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export type PromoCheck =
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| { ok: true }
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| { ok: false; reason: 'INACTIVE' | 'NOT_STARTED' | 'EXPIRED' | 'EXHAUSTED' | 'ALREADY_USED_BY_CLIENT' };
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export function checkPromo(promo: PromoLike, now: Date, usedByClient: boolean): PromoCheck {
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if (!promo.active) return { ok: false, reason: 'INACTIVE' };
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if (promo.validFrom && now < promo.validFrom) return { ok: false, reason: 'NOT_STARTED' };
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if (promo.validUntil && now > promo.validUntil) return { ok: false, reason: 'EXPIRED' };
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if (promo.maxUses !== null && promo.usedCount >= promo.maxUses) return { ok: false, reason: 'EXHAUSTED' };
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if (usedByClient) return { ok: false, reason: 'ALREADY_USED_BY_CLIENT' };
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return { ok: true };
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}
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/** Промокод-скидка не суммируется с Barev+: берётся большая из двух */
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export function combineDiscounts(barevPlusPct: number, promoPct: number | null): number {
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return Math.max(barevPlusPct, promoPct ?? 0);
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}
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