feat: Implement get subscription API endpoint

packages/backend/src/controllers/api/v1/users/get-subscription.ee.js

@@ -0,0 +1,9 @@
+import { renderObject } from '../../../../helpers/renderer.js';
+
+export default async (request, response) => {
+  const subscription = await request.currentUser
+    .$relatedQuery('currentSubscription')
+    .throwIfNotFound();
+
+  renderObject(response, subscription);
+};

packages/backend/src/controllers/api/v1/users/get-subscription.ee.test.js

@@ -0,0 +1,51 @@
+import { vi, describe, it, expect, beforeEach } from 'vitest';
+import request from 'supertest';
+import appConfig from '../../../../config/app.js';
+import app from '../../../../app.js';
+import createAuthTokenByUserId from '../../../../helpers/create-auth-token-by-user-id';
+import { createRole } from '../../../../../test/factories/role';
+import { createUser } from '../../../../../test/factories/user';
+import { createSubscription } from '../../../../../test/factories/subscription.js';
+import getSubscriptionMock from '../../../../../test/mocks/rest/api/v1/users/get-subscription.js';
+
+describe('GET /api/v1/users/:userId/subscription', () => {
+  let currentUser, role, subscription, token;
+
+  beforeEach(async () => {
+    vi.spyOn(appConfig, 'isCloud', 'get').mockReturnValue(true);
+
+    role = await createRole();
+
+    currentUser = await createUser({
+      roleId: role.id,
+    });
+
+    subscription = await createSubscription({ userId: currentUser.id });
+
+    token = createAuthTokenByUserId(currentUser.id);
+  });
+
+  it('should return subscription info of the current user', async () => {
+    const response = await request(app)
+      .get(`/api/v1/users/${currentUser.id}/subscription`)
+      .set('Authorization', token)
+      .expect(200);
+
+    const expectedPayload = getSubscriptionMock(subscription);
+
+    expect(response.body).toEqual(expectedPayload);
+  });
+
+  it('should return not found response if there is no current subscription', async () => {
+    const userWithoutSubscription = await createUser({
+      roleId: role.id,
+    });
+
+    const token = createAuthTokenByUserId(userWithoutSubscription.id);
+
+    await request(app)
+      .get(`/api/v1/users/${userWithoutSubscription.id}/subscription`)
+      .set('Authorization', token)
+      .expect(404);
+  });
+});