feat: Implement API endpoint to get flows of the specified app

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

@@ -0,0 +1,23 @@
+import { renderObject } from '../../../../helpers/renderer.js';
+import App from '../../../../models/app.js';
+import paginateRest from '../../../../helpers/pagination-rest.js';
+
+export default async (request, response) => {
+  const app = await App.findOneByKey(request.params.appKey);
+
+  const flowsQuery = request.currentUser.authorizedFlows
+    .clone()
+    .joinRelated({
+      steps: true,
+    })
+    .withGraphFetched({
+      steps: true,
+    })
+    .where('steps.app_key', app.key)
+    .orderBy('active', 'desc')
+    .orderBy('updated_at', 'desc');
+
+  const flows = await paginateRest(flowsQuery, request.query.page);
+
+  renderObject(response, flows);
+};