add getAppsFromToggleName

lib/client-metrics/index.js

@@ -47,6 +47,19 @@ module.exports = class UnleashClientMetrics {
         return this.apps[appName] ? Object.keys(this.apps[appName].seenToggles) : [];
     }
 
+    getAppsFromToggleName (toggleName) {
+        const apps = [];
+        Object.keys(this.apps).forEach(appName => {
+            const seenToggles = Object.keys(this.apps[appName].seenToggles);
+            if (seenToggles.includes(toggleName)) {
+                apps.push({
+                    appName,
+                });
+            }
+        });
+        return apps;
+    }
+
     getTogglesMetrics () {
         return {
             lastHour: this.lastHourProjection.getProjection(),

lib/routes/metrics.js

@@ -20,6 +20,11 @@ module.exports = function (app, config) {
         res.json(seenAppToggles);
     });
 
+    app.get('/client/seen-apps/:name', (req, res) => {
+        const seenApps = metrics.getAppsFromToggleName(req.params.name);
+        res.json(seenApps);
+    });
+
     app.get('/client/metrics/feature-toggles', (req, res) => {
         res.json(metrics.getTogglesMetrics());
     });