feat: Implement admin template show API endpoint

packages/backend/src/controllers/api/v1/admin/templates/get-template.ee.js

@@ -0,0 +1,10 @@
+import { renderObject } from '../../../../../helpers/renderer.js';
+import Template from '../../../../../models/template.ee.js';
+
+export default async (request, response) => {
+  const template = await Template.query()
+    .findById(request.params.templateId)
+    .throwIfNotFound();
+
+  renderObject(response, template, { serializer: 'AdminTemplate' });
+};

packages/backend/src/controllers/api/v1/admin/templates/get-template.ee.test.js

@@ -0,0 +1,35 @@
+import { vi, 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.js';
+import { createRole } from '../../../../../../test/factories/role.js';
+import { createUser } from '../../../../../../test/factories/user.js';
+import { createTemplate } from '../../../../../../test/factories/template.js';
+import getTemplateMock from '../../../../../../test/mocks/rest/api/v1/admin/templates/get-template.ee.js';
+import * as license from '../../../../../helpers/license.ee.js';
+
+describe('GET /api/v1/admin/templates/:templateId', () => {
+  let currentUser, token, role;
+
+  beforeEach(async () => {
+    vi.spyOn(license, 'hasValidLicense').mockResolvedValue(true);
+
+    role = await createRole({ name: 'Admin' });
+    currentUser = await createUser({ roleId: role.id });
+
+    token = await createAuthTokenByUserId(currentUser.id);
+  });
+
+  it('should return templates', async () => {
+    const template = await createTemplate();
+
+    const response = await request(app)
+      .get(`/api/v1/admin/templates/${template.id}`)
+      .set('Authorization', token)
+      .expect(200);
+
+    const expectedPayload = await getTemplateMock(template);
+
+    expect(response.body).toStrictEqual(expectedPayload);
+  });
+});