Initial commit - ERP System

app/api/sales/route.ts

@@ -0,0 +1,103 @@
+import { NextResponse } from 'next/server';
+import prisma from '../../../lib/prisma';
+import { getServerSession } from "next-auth/next";
+import { authOptions } from "../auth/[...nextauth]/route";
+
+async function getSession() {
+  const session = await getServerSession(authOptions);
+  if (!session) return null;
+  return session;
+}
+
+const PREFIXES: Record<string, string> = {
+  QUOTE: 'ANG', ORDER_CONFIRMATION: 'AB', DELIVERY_NOTE: 'LS', INVOICE: 'RE', CREDIT_NOTE: 'RK'
+};
+const NUMBER_FIELDS: Record<string, string> = {
+  QUOTE: 'nextQuoteNumber', ORDER_CONFIRMATION: 'nextOrderNumber',
+  DELIVERY_NOTE: 'nextDeliveryNumber', INVOICE: 'nextInvoiceNumber', CREDIT_NOTE: 'nextCreditNoteNumber'
+};
+
+async function generateNumber(type: string) {
+  const settings = await prisma.systemSettings.findFirst();
+  if (!settings) throw new Error('SystemSettings not found');
+  const year = new Date().getFullYear();
+  const prefix = PREFIXES[type] || 'DOC';
+  const field = NUMBER_FIELDS[type];
+  const num = (settings as any)[field] || 1;
+  await prisma.systemSettings.update({ where: { id: settings.id }, data: { [field]: num + 1 } });
+  return `${prefix}-${year}-${num.toString().padStart(4, '0')}`;
+}
+
+export async function GET(request: Request) {
+  const session = await getSession();
+  if (!session) return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+
+  try {
+    const { searchParams } = new URL(request.url);
+    const customerId = searchParams.get('customerId');
+
+    const where = customerId ? { customerId: parseInt(customerId) } : {};
+    const docs = await prisma.salesDocument.findMany({
+      where,
+      include: {
+        customer: { select: { companyName: true, firstName: true, lastName: true } },
+        items: { include: { product: { select: { name: true } } } },
+        createdBy: { select: { firstName: true, lastName: true } }
+      },
+      orderBy: { createdAt: 'desc' }
+    });
+    return NextResponse.json(docs);
+  } catch (error) {
+    console.error(error);
+    return NextResponse.json({ error: 'Ladefehler' }, { status: 500 });
+  }
+}
+
+export async function POST(request: Request) {
+  const session = await getSession();
+  const perms = (session?.user as any)?.permissions || [];
+  if (!perms.includes('SALES_MANAGE')) return NextResponse.json({ error: 'Keine Berechtigung' }, { status: 403 });
+
+  try {
+    const body = await request.json();
+    const number = await generateNumber(body.type);
+
+    // Auto-set validity for quotes
+    let validUntil = body.validUntil ? new Date(body.validUntil) : null;
+    if (body.type === 'QUOTE' && !validUntil) {
+      const settings = await prisma.systemSettings.findFirst();
+      if (settings?.defaultQuoteValidityDays) {
+        validUntil = new Date();
+        validUntil.setDate(validUntil.getDate() + settings.defaultQuoteValidityDays);
+      }
+    }
+    // Calculate totals
+    let subtotal = 0;
+    const items = (body.items || []).map((item: any) => {
+      const total = item.quantity * item.unitPrice;
+      subtotal += total;
+      return { ...item, total, taxRate: 19 };
+    });
+    const taxAmount = subtotal * 0.19;
+    const total = subtotal + taxAmount;
+
+    const doc = await prisma.salesDocument.create({
+      data: {
+        type: body.type,
+        number,
+        customerId: body.customerId,
+        createdById: (session?.user as any)?.id || null,
+        notes: body.notes || null,
+        validUntil,
+        subtotal, taxAmount, total,
+        items: { create: items.map((i: any) => ({ description: i.description, quantity: i.quantity, unitPrice: i.unitPrice, taxRate: i.taxRate, total: i.total, productId: i.productId || null })) }
+      },
+      include: { items: true, customer: true }
+    });
+
+    return NextResponse.json(doc, { status: 201 });
+  } catch (error) {
+    console.error(error);
+    return NextResponse.json({ error: 'Fehler beim Erstellen' }, { status: 500 });
+  }
+}