Create route to delete current user (#49)

* Create route to delete current user

* Add tests for delete route

backend/app/api/user/auth.test.ts

@@ -0,0 +1,26 @@
+import { prismaMock } from '@/__test__/singleton';
+import { User } from '@prisma/client';
+import { DELETE } from './route';
+
+jest.mock('@/lib/session', () => ({
+  verifySession: jest.fn(() => ({
+    isAuth: true,
+    uid: 2,
+  })),
+  deleteSession: jest.fn(() => {}),
+}));
+
+test('Delete succeeds if user is authenticated', async () => {
+  const temporaryUser: User = {
+    id: 1,
+    username: 'test',
+    createdAt: new Date(),
+    updatedAt: new Date(),
+  };
+  prismaMock.user.delete.mockResolvedValue(temporaryUser);
+
+  const res = await DELETE();
+  const data = await res.json();
+
+  expect(data.success).toBe(true);
+});

backend/app/api/user/noAuth.test.ts

@@ -0,0 +1,16 @@
+import { DELETE } from './route';
+
+jest.mock('@/lib/session', () => ({
+  verifySession: jest.fn(() => ({
+    isAuth: false,
+  })),
+  deleteSession: jest.fn(() => {}),
+}));
+
+test('Delete fails for an invalid session', async () => {
+  const res = await DELETE();
+  const data = await res.json();
+
+  expect(res.status).toEqual(400);
+  expect(data.error).toBe('Invalid session');
+});

backend/app/api/user/route.ts

@@ -1,5 +1,5 @@
 import prisma from '@/lib/prisma';
-import { verifySession } from '@/lib/session';
+import { deleteSession, verifySession } from '@/lib/session';
 import { NextResponse } from 'next/server';
 
 export const GET = async () => {
@@ -28,3 +28,32 @@ export const GET = async () => {
     user,
   });
 };
+
+type DeleteResponse = {
+  success: true;
+};
+
+export const DELETE = async (): Promise<
+  NextResponse<DeleteResponse | { error: string }>
+> => {
+  const session = await verifySession();
+
+  if (!session.isAuth) {
+    return NextResponse.json(
+      {
+        error: 'Invalid session',
+      },
+      { status: 400 }
+    );
+  }
+
+  await deleteSession();
+
+  await prisma.user.delete({
+    where: {
+      id: session.uid,
+    },
+  });
+
+  return NextResponse.json({ success: true });
+};