feat: Implement get step connection API endpoint

packages/backend/src/controllers/api/v1/steps/get-connection.js

@@ -0,0 +1,11 @@
+import { renderObject } from '../../../../helpers/renderer.js';
+
+export default async (request, response) => {
+  const step = await request.currentUser.authorizedSteps
+    .findById(request.params.stepId)
+    .throwIfNotFound();
+
+  const connection = await step.$relatedQuery('connection').throwIfNotFound();
+
+  renderObject(response, connection);
+};

packages/backend/src/controllers/api/v1/steps/get-connection.test.js

@@ -0,0 +1,121 @@
+import { describe, it, expect, beforeEach } from 'vitest';
+import request from 'supertest';
+import Crypto from 'crypto';
+import app from '../../../../app.js';
+import createAuthTokenByUserId from '../../../../helpers/create-auth-token-by-user-id';
+import { createUser } from '../../../../../test/factories/user';
+import { createConnection } from '../../../../../test/factories/connection';
+import { createFlow } from '../../../../../test/factories/flow';
+import { createStep } from '../../../../../test/factories/step';
+import { createPermission } from '../../../../../test/factories/permission';
+import getConnectionMock from '../../../../../test/mocks/rest/api/v1/steps/get-connection';
+
+describe('GET /api/v1/steps/:stepId/connection', () => {
+  let currentUser, currentUserRole, token;
+
+  beforeEach(async () => {
+    currentUser = await createUser();
+    currentUserRole = await currentUser.$relatedQuery('role');
+
+    token = createAuthTokenByUserId(currentUser.id);
+  });
+
+  it('should return the current user connection data of specified step', async () => {
+    const currentUserflow = await createFlow({ userId: currentUser.id });
+
+    const currentUserConnection = await createConnection();
+    const triggerStep = await createStep({
+      flowId: currentUserflow.id,
+      connectionId: currentUserConnection.id,
+    });
+
+    await createPermission({
+      action: 'read',
+      subject: 'Flow',
+      roleId: currentUserRole.id,
+      conditions: ['isCreator'],
+    });
+
+    const response = await request(app)
+      .get(`/api/v1/steps/${triggerStep.id}/connection`)
+      .set('Authorization', token)
+      .expect(200);
+
+    const expectedPayload = await getConnectionMock(currentUserConnection);
+
+    expect(response.body).toEqual(expectedPayload);
+  });
+
+  it('should return the current user connection data of specified step', async () => {
+    const anotherUser = await createUser();
+    const anotherUserFlow = await createFlow({ userId: anotherUser.id });
+
+    const anotherUserConnection = await createConnection();
+    const triggerStep = await createStep({
+      flowId: anotherUserFlow.id,
+      connectionId: anotherUserConnection.id,
+    });
+
+    await createPermission({
+      action: 'read',
+      subject: 'Flow',
+      roleId: currentUserRole.id,
+      conditions: [],
+    });
+
+    const response = await request(app)
+      .get(`/api/v1/steps/${triggerStep.id}/connection`)
+      .set('Authorization', token)
+      .expect(200);
+
+    const expectedPayload = await getConnectionMock(anotherUserConnection);
+
+    expect(response.body).toEqual(expectedPayload);
+  });
+
+  it('should return not found response for not existing step without connection', async () => {
+    const stepWithoutConnection = await createStep();
+
+    await createPermission({
+      action: 'read',
+      subject: 'Flow',
+      roleId: currentUserRole.id,
+      conditions: [],
+    });
+
+    await request(app)
+      .get(`/api/v1/steps/${stepWithoutConnection.id}/connection`)
+      .set('Authorization', token)
+      .expect(404);
+  });
+
+  it('should return not found response for not existing step UUID', async () => {
+    await createPermission({
+      action: 'read',
+      subject: 'Flow',
+      roleId: currentUserRole.id,
+      conditions: [],
+    });
+
+    const notExistingFlowUUID = Crypto.randomUUID();
+
+    await request(app)
+      .get(`/api/v1/steps/${notExistingFlowUUID}/connection`)
+      .set('Authorization', token)
+      .expect(404);
+  });
+
+  it('should return bad request response for invalid UUID', async () => {
+    await createPermission({
+      action: 'read',
+      subject: 'Flow',
+      roleId: currentUserRole.id,
+      conditions: [],
+    });
+
+    await request(app)
+      .get('/api/v1/steps/invalidFlowUUID/connection')
+      .set('Authorization', token)
+      .expect(400);
+  });
+});