feat: Implement get flow API endpoint

packages/backend/src/controllers/api/v1/flows/get-flow.js

@@ -0,0 +1,11 @@
+import { renderObject } from '../../../../helpers/renderer.js';
+
+export default async (request, response) => {
+  const flow = await request.currentUser.authorizedFlows
+    .withGraphJoined({ steps: true })
+    .orderBy('steps.position', 'asc')
+    .findOne({ 'flows.id': request.params.flowId })
+    .throwIfNotFound();
+
+  renderObject(response, flow);
+};

packages/backend/src/controllers/api/v1/flows/get-flow.test.js

@@ -0,0 +1,71 @@
+import { describe, it, expect, beforeEach } from 'vitest';
+import request from 'supertest';
+import app from '../../../../app.js';
+import createAuthTokenByUserId from '../../../../helpers/create-auth-token-by-user-id';
+import { createUser } from '../../../../../test/factories/user';
+import { createFlow } from '../../../../../test/factories/flow';
+import { createStep } from '../../../../../test/factories/step';
+import { createPermission } from '../../../../../test/factories/permission';
+import getFlowMock from '../../../../../test/mocks/rest/api/v1/flows/get-flow';
+
+describe('GET /api/v1/flows/:flowId', () => {
+  let currentUser, currentUserRole, token;
+
+  beforeEach(async () => {
+    currentUser = await createUser();
+    currentUserRole = await currentUser.$relatedQuery('role');
+
+    token = createAuthTokenByUserId(currentUser.id);
+  });
+
+  it('should return the flow data of current user', async () => {
+    const currentUserflow = await createFlow({ userId: currentUser.id });
+    const triggerStep = await createStep({ flowId: currentUserflow.id });
+    const actionStep = await createStep({ flowId: currentUserflow.id });
+
+    await createPermission({
+      action: 'read',
+      subject: 'Flow',
+      roleId: currentUserRole.id,
+      conditions: ['isCreator'],
+    });
+
+    const response = await request(app)
+      .get(`/api/v1/flows/${currentUserflow.id}`)
+      .set('Authorization', token)
+      .expect(200);
+
+    const expectedPayload = await getFlowMock(currentUserflow, [
+      triggerStep,
+      actionStep,
+    ]);
+
+    expect(response.body).toEqual(expectedPayload);
+  });
+
+  it('should return the flow data of another user', async () => {
+    const anotherUser = await createUser();
+    const anotherUserFlow = await createFlow({ userId: anotherUser.id });
+    const triggerStep = await createStep({ flowId: anotherUserFlow.id });
+    const actionStep = await createStep({ flowId: anotherUserFlow.id });
+
+    await createPermission({
+      action: 'read',
+      subject: 'Flow',
+      roleId: currentUserRole.id,
+      conditions: [],
+    });
+
+    const response = await request(app)
+      .get(`/api/v1/flows/${anotherUserFlow.id}`)
+      .set('Authorization', token)
+      .expect(200);
+
+    const expectedPayload = await getFlowMock(anotherUserFlow, [
+      triggerStep,
+      actionStep,
+    ]);
+
+    expect(response.body).toEqual(expectedPayload);
+  });
+});