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app/api/views/default/rotate/route.ts

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+import { randomUUID } from "crypto";
+import { NextResponse } from "next/server";
+import { prisma } from "../../../../../lib/prisma";
+import { requireSession } from "../../../../../lib/auth-helpers";
+
+export async function POST() {
+  const { session } = await requireSession();
+  if (!session) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+
+  const email = session.user?.email || "";
+  const view = await prisma.userView.findFirst({
+    where: { user: { email } }
+  });
+
+  if (!view) {
+    return NextResponse.json({ error: "Keine Ansicht gefunden." }, { status: 404 });
+  }
+
+  const updated = await prisma.userView.update({
+    where: { id: view.id },
+    data: { token: randomUUID() }
+  });
+
+  return NextResponse.json({ id: updated.id, token: updated.token });
+}

app/api/views/default/route.ts

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+import { randomUUID } from "crypto";
+import { NextResponse } from "next/server";
+import { prisma } from "../../../../lib/prisma";
+import { requireSession } from "../../../../lib/auth-helpers";
+
+export async function GET() {
+  const { session } = await requireSession();
+  if (!session) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+
+  const email = session.user?.email || "";
+  const existing = await prisma.userView.findFirst({
+    where: { user: { email } },
+    include: {
+      items: { include: { event: true } },
+      categories: { include: { category: true } },
+      exclusions: true
+    }
+  });
+
+  if (existing) {
+    return NextResponse.json(existing);
+  }
+
+  const view = await prisma.userView.create({
+    data: {
+      name: "Meine Ansicht",
+      token: randomUUID(),
+      user: { connect: { email } }
+    }
+  });
+
+  const categories = await prisma.category.findMany({
+    select: { id: true }
+  });
+
+  if (categories.length > 0) {
+    await prisma.userViewCategory.createMany({
+      data: categories.map((category) => ({
+        viewId: view.id,
+        categoryId: category.id
+      }))
+    });
+  }
+
+  const hydrated = await prisma.userView.findUnique({
+    where: { id: view.id },
+    include: {
+      items: { include: { event: true } },
+      categories: { include: { category: true } },
+      exclusions: true
+    }
+  });
+
+  return NextResponse.json(hydrated, { status: 201 });
+}