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Refactor createUniqueProducts function and update checkout logic #27

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Merged
choden-dev merged 2 commits into from
Mar 8, 2026
Merged

Refactor createUniqueProducts function and update checkout logic #27

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f4f894f
Refactor createUniqueProducts function and update checkout logic
choden-dev Mar 8, 2026
60c106d
Refactor createUniqueProducts function and update checkout logic
choden-dev Mar 8, 2026
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45 changes: 19 additions & 26 deletions lib/stripe.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -90,36 +90,29 @@ export const getPriceForPages = async (pages: number, isColor: boolean) => {
};
};

export const createUniqueProductsForDuplicates = async (
export const createUniqueProducts = async (
items: (StripeBackendItem & { name: string })[],
) => {
const stripe: Stripe = await makeStripeConnection();

await Promise.all(
items.map(async (item, index) => {
const duplicateIndex = items.findIndex(
(otherItem, otherIndex) =>
otherIndex !== index && otherItem.price === item.price,
);

if (duplicateIndex !== -1) {
const duplicate = items[duplicateIndex];
const price = await stripe.prices.retrieve(duplicate.priceId);
const product = await stripe.products.create({
name: duplicate.name,
default_price_data: {
unit_amount_decimal: price.unit_amount_decimal as string,
currency: price.currency,
},
});

items[index].productId = product.id;
items[index].price = product.default_price as string;
}
return await Promise.all(
items.map(async (item) => {
const price = await stripe.prices.retrieve(item.priceId);
const product = await stripe.products.create({
name: item.name,
default_price_data: {
unit_amount_decimal: price.unit_amount_decimal as string,
currency: price.currency,
},
});

return {
...item,
productId: product.id,
price: product.default_price as string,
};
}),
);

return items;
};

export const createCoupons = async <T extends StripeBackendItem>(
Expand All @@ -129,16 +122,16 @@ export const createCoupons = async <T extends StripeBackendItem>(

const itemsWithBulkDiscount = getItemsWithBulkDiscount(items);
if (itemsWithBulkDiscount.length === 0) return undefined;
if (getPercentOff() === 0) return undefined;

const coupon = await stripe.coupons.create({
return await stripe.coupons.create({
percent_off: getPercentOff(),
applies_to: {
products: itemsWithBulkDiscount.map((item) => item.productId),
},
duration: "once",
name: `${getMinimumItemsForDiscount()} or more discount!`,
});
return coupon;
};

export const createSession = async (
Expand Down
6 changes: 2 additions & 4 deletions pages/api/checkout.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@ import { z } from "zod";
import {
createCoupons,
createSession,
createUniqueProductsForDuplicates,
createUniqueProducts,
} from "../../lib/stripe";

const CheckoutSchema = z.object({
Expand All @@ -27,9 +27,7 @@ export default async function handler(
try {
const parsedBody = CheckoutSchema.parse(JSON.parse(req.body));

const updatedItems = await createUniqueProductsForDuplicates(
parsedBody.items,
);
const updatedItems = await createUniqueProducts(parsedBody.items);
const coupon = await createCoupons(updatedItems);

const session = await createSession(
Expand Down