Convert tracking dispatcher to TS

Summary: Convert file to TS

Reviewed By: passy

Differential Revision: D16687919

fbshipit-source-id: a2fb8a0ba5e0d5c42765e80311b39868b1e78244

src/dispatcher/tracking.tsx

@@ -0,0 +1,84 @@
+/**
+ * Copyright 2018-present Facebook.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ * @format
+ */
+
+import {ipcRenderer} from 'electron';
+// $FlowFixMe perf_hooks is a new API in node
+import {performance} from 'perf_hooks';
+
+import {Store} from '../reducers/index';
+import {Logger} from '../fb-interfaces/Logger.js';
+import Client from '../Client';
+
+export default (store: Store, logger: Logger) => {
+  let droppedFrames: number = 0;
+  let largeFrameDrops: number = 0;
+  function droppedFrameDetection(
+    past: DOMHighResTimeStamp,
+    isWindowFocused: () => boolean,
+  ) {
+    const now = performance.now();
+    requestAnimationFrame(() => droppedFrameDetection(now, isWindowFocused));
+    const dropped = Math.round((now - past) / (1000 / 60) - 1);
+    if (!isWindowFocused() || dropped < 1) {
+      return;
+    }
+    droppedFrames += dropped;
+    if (dropped > 3) {
+      largeFrameDrops++;
+    }
+  }
+
+  if (typeof window !== 'undefined') {
+    droppedFrameDetection(
+      performance.now(),
+      () => store.getState().application.windowIsFocused,
+    );
+  }
+
+  ipcRenderer.on('trackUsage', () => {
+    const {
+      selectedDevice,
+      selectedPlugin,
+      selectedApp,
+      clients,
+    } = store.getState().connections;
+
+    const {flipperRating} = store.getState().application;
+
+    if (!selectedDevice || !selectedPlugin) {
+      return;
+    }
+
+    let app: string;
+    let sdkVersion: number;
+
+    if (selectedApp) {
+      const client = clients.find((c: Client) => c.id === selectedApp);
+      if (client) {
+        app = client.query.app;
+        sdkVersion = client.query.sdk_version || 0;
+      }
+    }
+
+    const info = {
+      droppedFrames,
+      largeFrameDrops,
+      os: selectedDevice.os,
+      device: selectedDevice.title,
+      plugin: selectedPlugin,
+      app,
+      sdkVersion,
+      flipperRating,
+    };
+
+    // reset dropped frames counter
+    droppedFrames = 0;
+    largeFrameDrops = 0;
+
+    logger.track('usage', 'ping', info);
+  });
+};