chore(modernize): Modernize FeaturesController

lib/routes/client-api/feature.js

@@ -9,26 +9,38 @@ const filter = (key, value) => {
     return array => array.filter(item => item[key].startsWith(value));
 };
 
-exports.router = config => {
-    const router = Router();
-    const { featureToggleStore } = config.stores;
+class FeatureController {
+    constructor(config) {
+        const router = Router();
+        this._router = router;
+        this.store = config.stores.featureToggleStore;
 
-    router.get('/', (req, res) => {
+        router.get('/', (req, res) => this.getAll(req, res));
+        router.get('/:featureName', this.getFeatureToggle.bind(this));
+    }
+
+    async getAll(req, res) {
         const nameFilter = filter('name', req.query.namePrefix);
-        featureToggleStore
-            .getFeatures()
-            .then(nameFilter)
-            .then(features => res.json({ version, features }));
-    });
 
-    router.get('/:featureName', (req, res) => {
-        featureToggleStore
-            .getFeature(req.params.featureName)
-            .then(feature => res.json(feature).end())
-            .catch(() =>
-                res.status(404).json({ error: 'Could not find feature' })
-            );
-    });
+        const allFeatureToggles = await this.store.getFeatures();
+        const features = nameFilter(allFeatureToggles);
 
-    return router;
-};
+        res.json({ version, features });
+    }
+
+    async getFeatureToggle(req, res) {
+        try {
+            const name = req.params.featureName;
+            const featureToggle = await this.store.getFeature(name);
+            res.json(featureToggle).end();
+        } catch (err) {
+            res.status(404).json({ error: 'Could not find feature' });
+        }
+    }
+
+    router() {
+        return this._router;
+    }
+}
+
+module.exports = FeatureController;

lib/routes/client-api/index.js

@@ -1,7 +1,7 @@
 'use strict';
 
 const { Router } = require('express');
-const features = require('./feature.js');
+const FeatureController = require('./feature.js');
 const metrics = require('./metrics.js');
 const register = require('./register.js');
 
@@ -22,7 +22,7 @@ exports.router = config => {
         res.json(apiDef);
     });
 
-    router.use('/features', features.router(config));
+    router.use('/features', new FeatureController(config).router());
     router.use('/metrics', metrics.router(config));
     router.use('/register', register.router(config));
 

lib/routes/index.js

@@ -8,7 +8,7 @@ const version = module.exports.version;
 
 const adminApi = require('./admin-api');
 const clientApi = require('./client-api');
-const clientFeatures = require('./client-api/feature.js');
+const FeatureController = require('./client-api/feature.js');
 
 const HealthCheckController = require('./health-check');
 const BackstageController = require('./backstage.js');
@@ -29,7 +29,7 @@ class IndexRouter {
 
         // legacy support (remove in 4.x)
         if (config.enableLegacyRoutes) {
-            router.use('/api/features', clientFeatures.router(config));
+            router.use('/api/features', new FeatureController(config).router());
         }
     }