Add posthog Telemetry (Anonymity Logic + call duration telemetry) (#658)

Co-authored-by: Timo K <timok@element.io>
Co-authored-by: Šimon Brandner <simon.bra.ag@gmail.com>

src/PosthogEvents.ts

@@ -0,0 +1,145 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {
+  IPosthogEvent,
+  PosthogAnalytics,
+  RegistrationType,
+} from "./PosthogAnalytics";
+
+interface CallEnded extends IPosthogEvent {
+  eventName: "CallEnded";
+  callName: string;
+  callParticipantsOnLeave: number;
+  callParticipantsMax: number;
+  callDuration: number;
+}
+
+export class CallEndedTracker {
+  private cache: { startTime: Date; maxParticipantsCount: number } = {
+    startTime: new Date(0),
+    maxParticipantsCount: 0,
+  };
+
+  cacheStartCall(time: Date) {
+    this.cache.startTime = time;
+  }
+
+  cacheParticipantCountChanged(count: number) {
+    this.cache.maxParticipantsCount = Math.max(
+      count,
+      this.cache.maxParticipantsCount
+    );
+  }
+
+  track(callName: string, callParticipantsNow: number) {
+    PosthogAnalytics.instance.trackEvent<CallEnded>({
+      eventName: "CallEnded",
+      callName,
+      callParticipantsMax: this.cache.maxParticipantsCount,
+      callParticipantsOnLeave: callParticipantsNow,
+      callDuration: (Date.now() - this.cache.startTime.getTime()) / 1000,
+    });
+  }
+}
+
+interface CallStarted extends IPosthogEvent {
+  eventName: "CallStarted";
+  callName: string;
+}
+
+export class CallStartedTracker {
+  track(callName: string) {
+    PosthogAnalytics.instance.trackEvent<CallStarted>({
+      eventName: "CallStarted",
+      callName,
+    });
+  }
+}
+
+interface Signup extends IPosthogEvent {
+  eventName: "Signup";
+  signupDuration: number;
+}
+
+export class SignupTracker {
+  private cache: { signupStart: Date; signupEnd: Date } = {
+    signupStart: new Date(0),
+    signupEnd: new Date(0),
+  };
+
+  cacheSignupStart(time: Date) {
+    this.cache.signupStart = time;
+  }
+
+  getSignupEndTime() {
+    return this.cache.signupEnd;
+  }
+
+  cacheSignupEnd(time: Date) {
+    this.cache.signupEnd = time;
+  }
+
+  track() {
+    PosthogAnalytics.instance.trackEvent<Signup>({
+      eventName: "Signup",
+      signupDuration:
+        new Date().getSeconds() - this.cache.signupStart.getSeconds(),
+    });
+    PosthogAnalytics.instance.setRegistrationType(RegistrationType.Registered);
+  }
+}
+
+interface Login extends IPosthogEvent {
+  eventName: "Login";
+}
+
+export class LoginTracker {
+  track() {
+    PosthogAnalytics.instance.trackEvent<Login>({
+      eventName: "Login",
+    });
+    PosthogAnalytics.instance.setRegistrationType(RegistrationType.Registered);
+  }
+}
+
+interface MuteMicrophone {
+  eventName: "MuteMicrophone";
+  targetMuteState: "mute" | "unmute";
+}
+
+export class MuteMicrophoneTracker {
+  track(targetIsMute: boolean) {
+    PosthogAnalytics.instance.trackEvent<MuteMicrophone>({
+      eventName: "MuteMicrophone",
+      targetMuteState: targetIsMute ? "mute" : "unmute",
+    });
+  }
+}
+
+interface MuteCamera {
+  eventName: "MuteCamera";
+  targetMuteState: "mute" | "unmute";
+}
+
+export class MuteCameraTracker {
+  track(targetIsMute: boolean) {
+    PosthogAnalytics.instance.trackEvent<MuteCamera>({
+      eventName: "MuteCamera",
+      targetMuteState: targetIsMute ? "mute" : "unmute",
+    });
+  }
+}