Initial commit: FPT Financial Planning Tool

src/app/api/plans/[planId]/export/route.ts

@@ -0,0 +1,31 @@
+import { NextRequest, NextResponse } from "next/server";
+import { prisma } from "@/lib/db";
+import { planInclude, toHouseholdInput, toPlanInput, getHouseholdOrNull } from "@/lib/queries";
+import { computePlan, planToCsv } from "@/lib/calculations";
+
+export async function GET(
+  _request: NextRequest,
+  { params }: { params: Promise<{ planId: string }> }
+) {
+  const { planId } = await params;
+  const household = await getHouseholdOrNull();
+  if (!household) {
+    return NextResponse.json({ error: "Kein Haushalt vorhanden." }, { status: 400 });
+  }
+
+  const plan = await prisma.plan.findUnique({ where: { id: planId }, include: planInclude });
+  if (!plan) {
+    return NextResponse.json({ error: "Plan nicht gefunden." }, { status: 404 });
+  }
+
+  const planInput = toPlanInput(plan);
+  const computed = computePlan(planInput, toHouseholdInput(household));
+  const csv = planToCsv(planInput, computed);
+
+  return new NextResponse(csv, {
+    headers: {
+      "Content-Type": "text/csv; charset=utf-8",
+      "Content-Disposition": `attachment; filename="${plan.name.replace(/[^a-z0-9]+/gi, "_")}.csv"`,
+    },
+  });
+}