Merge pull request #81 from rafaelkallis/feat-telemetryevents

telemetry events

src/app.js

@@ -23,10 +23,10 @@
 
 const express = require("express");
 const { Webhooks } = require("@octokit/webhooks");
-const appInsights = require("applicationinsights");
 const { Classifier } = require("./classifier");
 const github = require("./github");
 const config = require("./config");
+const telemetry = require("./telemetry");
 
 module.exports = async function App() {
   const app = express();
@@ -64,12 +64,12 @@ module.exports = async function App() {
         accessToken,
       });
 
-      // appInsights.defaultClient.trackEvent({ name: "Classified" });
+      telemetry.event("Classified");
     }
   });
 
   webhooks.on("installation.created", async () => {
-    appInsights.defaultClient.trackEvent({ name: "Installed" });
+    telemetry.event("Installed");
   });
   app.use(webhooks.middleware);
 

src/index.js

@@ -23,12 +23,18 @@
 
 const appInsights = require("applicationinsights");
 const config = require("./config");
+const telemetry = require("./telemetry");
+
+if (config.isDevelopment) {
+  telemetry.attachConsole();
+}
 
 if (config.APPINSIGHTS_INSTRUMENTATIONKEY) {
   appInsights
     .setup(config.APPINSIGHTS_INSTRUMENTATIONKEY)
     .setSendLiveMetrics(true)
     .start();
+  telemetry.attachAppInsights();
 }
 
 const App = require("./app");

src/telemetry.js

@@ -0,0 +1,52 @@
+/**
+ * @license Ticket Tagger automatically predicts and labels issue types.
+ * Copyright (C) 2018,2019,2020  Rafael Kallis
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * @file telemetry
+ * @author Rafael Kallis <[email protected]>
+ */
+
+"use strict";
+
+const EventEmitter = require("events");
+const appInsights = require("applicationinsights");
+
+class Telemetry {
+  constructor() {
+    this.emitter = new EventEmitter();
+  }
+
+  event(name) {
+    this.emitter.emit("event", name);
+  }
+
+  onEvent(handler) {
+    this.emitter.on("event", handler);
+  }
+
+  attachConsole() {
+    this.onEvent((name) => console.info(`Event emitted: ${name}`));
+  }
+
+  attachAppInsights() {
+    if (!appInsights.defaultClient) {
+      return;
+    }
+    this.onEvent((name) => appInsights.defaultClient.trackEvent({ name }));
+  }
+}
+
+module.exports = new Telemetry();