N-FIN-47: add server action to delete account

src/lib/actions/accountDelete.ts

@@ -0,0 +1,58 @@
+import { ActionResponse } from '@/lib/types/actionResponse';
+import { URL_SIGN_IN } from '@/lib/constants';
+import { getUser, lucia } from '@/auth';
+import { prismaClient } from '@/prisma';
+import { cookies } from 'next/headers';
+
+export default async function accountDelete(): Promise<ActionResponse> {
+    'use server';
+
+    const user = await getUser();
+
+    if (!user) {
+        return {
+            type: 'error',
+            message: 'You aren\'t signed in.',
+            redirect: URL_SIGN_IN,
+        };
+    }
+
+    await prismaClient.payment.deleteMany({
+        where: {
+            userId: user.id,
+        },
+    });
+
+    await prismaClient.entity.deleteMany({
+        where: {
+            userId: user.id,
+        },
+    });
+
+    await prismaClient.category.deleteMany({
+        where: {
+            userId: user.id,
+        },
+    });
+
+    await prismaClient.session.deleteMany({
+        where: {
+            userId: user.id,
+        },
+    });
+
+    await prismaClient.user.delete({
+        where: {
+            id: user.id,
+        },
+    });
+
+    const sessionCookie = lucia.createBlankSessionCookie();
+    cookies().set(sessionCookie.name, sessionCookie.value, sessionCookie.attributes);
+
+    return {
+        type: 'success',
+        message: 'Your account was removed.',
+        redirect: URL_SIGN_IN,
+    };
+}