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* Cart Merge Logic (Server-Side)
*
* Contains database operations for cart merging.
* For client-safe utilities, use cart-merge-utils.ts instead.
*
* @server-only
*/
import { prisma } from '@/lib/prisma';
import { CartItem } from '@/redux/features/cartSlice';
import { logger } from '@/lib/logging';
// Re-export client-safe utilities for convenience when importing on server
export {
mergeAnonymousCartToUser,
transformDbCartToCartItems,
validateCartItems,
type MergeResult,
type ConflictItem } from './cart-merge-utils';
/**
* Apply cart merge to database
*
* This function clears the user's current cart and replaces it with the merged items
*
* @param userId - User ID
* @param mergedItems - Merged cart items
* @param deviceId - Device identifier
*/
export async function applyCartMerge(
userId: number,
mergedItems: CartItem[],
deviceId: string = 'default'
): Promise<void> {
try {
await prisma.$transaction(async (tx) => {
// Delete existing cart items for this user
await tx.cart.deleteMany({
where: { userId }});
// Insert merged items
if (mergedItems.length > 0) {
await tx.cart.createMany({
data: mergedItems.map((item) => ({
userId,
productId: item.id,
quantity: item.quantity,
deviceId,
syncedAt: new Date()}))});
}
});
} catch (error) {
logger.error('Failed to apply cart merge', error instanceof Error ? error : new Error(String(error)), { category: 'CART' });
throw new Error('Failed to apply cart merge to database');
}
}
/**
* Get cart items that need to be synced (have stale flag)
*/
export async function getStaleCartItems(userId: number) {
return await prisma.cart.findMany({
where: {
userId,
isStale: true},
include: {
product: {
include: {
images: true}}}});
}
/**
* Mark cart items as stale (for conflict resolution)
*/
export async function markCartItemsAsStale(userId: number, productIds: number[]) {
await prisma.cart.updateMany({
where: {
userId,
productId: {
in: productIds}},
data: {
isStale: true}});
}
/**
* Clear stale flags from cart items
*/
export async function clearStaleFlags(userId: number) {
await prisma.cart.updateMany({
where: {
userId,
isStale: true},
data: {
isStale: false}});
}
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