feat(api): add sales and cash register endpoints
Add complete POS (Point of Sale) backend: - Sales API: list with filters, create with atomicity (stock updates), void/cancel - Cash register API: open/close registers, get details with payment breakdown - Transactions API: list transactions, add manual deposits/withdrawals Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Ivan
457
apps/web/app/api/sales/route.ts
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457
apps/web/app/api/sales/route.ts
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import { NextRequest, NextResponse } from 'next/server';
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import { getServerSession } from 'next-auth';
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import { authOptions } from '@/lib/auth';
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import { db } from '@/lib/db';
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import { z } from 'zod';
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import { Decimal } from '@prisma/client/runtime/library';
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// Validation schema for sale item
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const saleItemSchema = z.object({
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productId: z.string().cuid('Invalid product ID'),
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quantity: z.number().int().positive('Quantity must be positive'),
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price: z.number().nonnegative('Price must be non-negative'),
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});
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// Validation schema for payment
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const paymentSchema = z.object({
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amount: z.number().positive('Payment amount must be positive'),
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method: z.enum(['CASH', 'CARD', 'TRANSFER', 'MEMBERSHIP', 'FREE']),
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reference: z.string().optional(),
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});
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// Validation schema for creating a sale
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const createSaleSchema = z.object({
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siteId: z.string().cuid('Invalid site ID'),
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clientId: z.string().cuid('Invalid client ID').optional(),
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items: z.array(saleItemSchema).min(1, 'At least one item is required'),
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payments: z.array(paymentSchema).min(1, 'At least one payment is required'),
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notes: z.string().max(500).optional(),
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discount: z.number().nonnegative('Discount must be non-negative').optional().default(0),
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tax: z.number().nonnegative('Tax must be non-negative').optional().default(0),
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});
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// GET /api/sales - List sales with filters
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export async function GET(request: NextRequest) {
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try {
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const session = await getServerSession(authOptions);
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if (!session?.user) {
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return NextResponse.json(
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{ error: 'Unauthorized' },
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{ status: 401 }
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);
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}
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const { searchParams } = new URL(request.url);
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const siteId = searchParams.get('siteId');
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const createdById = searchParams.get('createdBy');
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const startDate = searchParams.get('startDate');
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const endDate = searchParams.get('endDate');
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const clientId = searchParams.get('clientId');
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// Build the where clause
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interface SaleWhereClause {
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createdBy: {
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organizationId: string;
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};
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createdById?: string;
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clientId?: string;
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cashRegister?: {
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siteId: string;
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};
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createdAt?: {
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gte?: Date;
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lte?: Date;
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};
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}
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const whereClause: SaleWhereClause = {
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createdBy: {
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organizationId: session.user.organizationId,
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},
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};
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// Filter by site via cash register
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if (siteId) {
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// Verify site belongs to user's organization
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const site = await db.site.findFirst({
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where: {
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id: siteId,
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organizationId: session.user.organizationId,
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},
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});
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if (!site) {
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return NextResponse.json(
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{ error: 'Site not found or does not belong to your organization' },
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{ status: 404 }
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);
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}
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whereClause.cashRegister = {
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siteId,
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};
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} else if (session.user.siteId) {
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whereClause.cashRegister = {
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siteId: session.user.siteId,
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};
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}
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// Filter by creator
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if (createdById) {
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whereClause.createdById = createdById;
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}
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// Filter by client
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if (clientId) {
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whereClause.clientId = clientId;
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}
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// Filter by date range
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if (startDate || endDate) {
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whereClause.createdAt = {};
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if (startDate) {
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const start = new Date(startDate);
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start.setHours(0, 0, 0, 0);
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whereClause.createdAt.gte = start;
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}
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if (endDate) {
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const end = new Date(endDate);
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end.setHours(23, 59, 59, 999);
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whereClause.createdAt.lte = end;
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}
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}
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const sales = await db.sale.findMany({
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where: whereClause,
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include: {
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items: {
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include: {
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product: {
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select: {
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id: true,
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name: true,
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sku: true,
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},
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},
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},
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},
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payments: {
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select: {
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id: true,
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amount: true,
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paymentType: true,
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reference: true,
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createdAt: true,
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},
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},
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client: {
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select: {
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id: true,
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firstName: true,
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lastName: true,
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email: true,
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phone: true,
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},
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},
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createdBy: {
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select: {
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id: true,
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firstName: true,
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lastName: true,
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},
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},
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cashRegister: {
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select: {
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id: true,
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site: {
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select: {
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id: true,
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name: true,
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},
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},
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},
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},
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},
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orderBy: {
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createdAt: 'desc',
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},
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});
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return NextResponse.json(sales);
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} catch (error) {
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console.error('Error fetching sales:', error);
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return NextResponse.json(
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{ error: 'Failed to fetch sales' },
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{ status: 500 }
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);
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}
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}
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// POST /api/sales - Create a new sale
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export async function POST(request: NextRequest) {
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try {
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const session = await getServerSession(authOptions);
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if (!session?.user) {
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return NextResponse.json(
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{ error: 'Unauthorized' },
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{ status: 401 }
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);
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}
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const body = await request.json();
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// Validate input with Zod schema
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const validationResult = createSaleSchema.safeParse(body);
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if (!validationResult.success) {
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return NextResponse.json(
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{
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error: 'Invalid sale data',
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details: validationResult.error.flatten().fieldErrors,
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},
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{ status: 400 }
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);
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}
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const { siteId, clientId, items, payments, notes, discount, tax } = validationResult.data;
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// Verify site belongs to user's organization
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const site = await db.site.findFirst({
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where: {
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id: siteId,
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organizationId: session.user.organizationId,
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},
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});
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if (!site) {
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return NextResponse.json(
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{ error: 'Site not found or does not belong to your organization' },
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{ status: 404 }
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);
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}
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// If user is SITE_ADMIN, verify they have access to this site
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if (session.user.role === 'SITE_ADMIN' && session.user.siteId !== siteId) {
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return NextResponse.json(
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{ error: 'Forbidden: You do not have access to this site' },
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{ status: 403 }
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);
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}
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// Verify client if provided
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if (clientId) {
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const client = await db.client.findFirst({
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where: {
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id: clientId,
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organizationId: session.user.organizationId,
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},
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});
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if (!client) {
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return NextResponse.json(
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{ error: 'Client not found or does not belong to your organization' },
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{ status: 404 }
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);
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}
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}
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// Calculate subtotal from items
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const subtotal = items.reduce((sum, item) => sum + (item.price * item.quantity), 0);
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const total = subtotal - (discount || 0) + (tax || 0);
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// Validate total matches sum of items
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if (total < 0) {
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return NextResponse.json(
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{ error: 'Invalid total: discount cannot exceed subtotal plus tax' },
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{ status: 400 }
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);
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}
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// Validate payment covers total
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const totalPayment = payments.reduce((sum, payment) => sum + payment.amount, 0);
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if (Math.abs(totalPayment - total) > 0.01) { // Allow for small floating point differences
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return NextResponse.json(
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{ error: `Payment amount (${totalPayment.toFixed(2)}) does not match total (${total.toFixed(2)})` },
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{ status: 400 }
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);
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}
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// Get product IDs and verify stock availability
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const productIds = items.map(item => item.productId);
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const products = await db.product.findMany({
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where: {
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id: { in: productIds },
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organizationId: session.user.organizationId,
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isActive: true,
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},
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});
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if (products.length !== productIds.length) {
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return NextResponse.json(
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{ error: 'One or more products not found or inactive' },
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{ status: 404 }
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);
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}
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// Check stock availability for products that track stock
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for (const item of items) {
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const product = products.find(p => p.id === item.productId);
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if (product && product.trackStock && product.stock < item.quantity) {
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return NextResponse.json(
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{ error: `Insufficient stock for product "${product.name}". Available: ${product.stock}, Requested: ${item.quantity}` },
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{ status: 400 }
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);
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}
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}
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// Check for open cash register if any payment is cash
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const hasCashPayment = payments.some(p => p.method === 'CASH');
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let cashRegisterId: string | null = null;
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if (hasCashPayment) {
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const openRegister = await db.cashRegister.findFirst({
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where: {
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siteId,
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closedAt: null,
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},
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});
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if (!openRegister) {
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return NextResponse.json(
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{ error: 'No open cash register found for this site. Please open a register first.' },
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{ status: 400 }
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);
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}
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cashRegisterId = openRegister.id;
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}
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// Determine primary payment type
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const primaryPayment = payments.reduce((prev, current) =>
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current.amount > prev.amount ? current : prev
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);
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// Create sale with transaction for atomicity
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const sale = await db.$transaction(async (tx) => {
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// Create the sale
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const newSale = await tx.sale.create({
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data: {
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clientId: clientId || null,
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createdById: session.user.id,
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cashRegisterId,
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subtotal: new Decimal(subtotal),
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discount: new Decimal(discount || 0),
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tax: new Decimal(tax || 0),
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total: new Decimal(total),
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paymentType: primaryPayment.method,
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notes: notes || null,
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},
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});
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// Create sale items
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for (const item of items) {
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await tx.saleItem.create({
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data: {
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saleId: newSale.id,
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productId: item.productId,
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quantity: item.quantity,
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unitPrice: new Decimal(item.price),
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subtotal: new Decimal(item.price * item.quantity),
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},
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});
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// Update product stock (decrement)
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const product = products.find(p => p.id === item.productId);
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if (product && product.trackStock) {
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await tx.product.update({
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where: { id: item.productId },
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data: {
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stock: {
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decrement: item.quantity,
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},
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},
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});
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}
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}
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// Create payments
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for (const payment of payments) {
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await tx.payment.create({
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data: {
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saleId: newSale.id,
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clientId: clientId || null,
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amount: new Decimal(payment.amount),
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paymentType: payment.method,
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reference: payment.reference || null,
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cashRegisterId: payment.method === 'CASH' ? cashRegisterId : null,
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},
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});
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}
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// Return the sale with all relations
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return tx.sale.findUnique({
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where: { id: newSale.id },
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include: {
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items: {
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include: {
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product: {
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select: {
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id: true,
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name: true,
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sku: true,
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},
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},
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},
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},
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payments: {
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select: {
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id: true,
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amount: true,
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paymentType: true,
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reference: true,
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createdAt: true,
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},
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},
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client: {
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select: {
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id: true,
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firstName: true,
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lastName: true,
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email: true,
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phone: true,
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},
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},
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createdBy: {
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select: {
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id: true,
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firstName: true,
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lastName: true,
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},
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},
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cashRegister: {
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select: {
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id: true,
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site: {
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select: {
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id: true,
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name: true,
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},
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},
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},
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},
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},
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});
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});
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return NextResponse.json(sale, { status: 201 });
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} catch (error) {
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console.error('Error creating sale:', error);
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return NextResponse.json(
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{ error: 'Failed to create sale' },
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{ status: 500 }
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);
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}
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}
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