[RN] Add support for callstats

modules/statistics/CallStats.js

 /* global callstats */
-const logger = require('jitsi-meet-logger').getLogger(__filename);
-const GlobalOnErrorHandler = require('../util/GlobalOnErrorHandler');
 
+import RTCBrowserType from '../RTC/RTCBrowserType';
+import GlobalOnErrorHandler from '../util/GlobalOnErrorHandler';
+
+const logger = require('jitsi-meet-logger').getLogger(__filename);
 
 /**
  * We define enumeration of wrtcFuncNames as we need them before
             throw new Error('CallStats backend has been initialized already!');
         }
         try {
-            // eslint-disable-next-line new-cap
-            CallStats.backend = new callstats();
+            // In react-native we need to import the callstats module, but
+            // imports are only allowed at top-level, so we must use require
+            // here. Sigh.
+            const CallStatsBackend
+                = RTCBrowserType.isReactNative()
+                    ? require('react-native-callstats/callstats')
+                    : callstats;
+
+            CallStats.backend = new CallStatsBackend();
 
             CallStats._traceAndCatchBackendCalls(CallStats.backend);
 

modules/statistics/statistics.js

+import EventEmitter from 'events';
+
 import analytics from './AnalyticsAdapter';
 import CallStats from './CallStats';
-import JitsiTrackError from '../../JitsiTrackError';
 import LocalStats from './LocalStatsCollector';
 import RTPStats from './RTPStatsCollector';
-import * as StatisticsEvents from '../../service/statistics/Events';
+
+import RTCBrowserType from '../RTC/RTCBrowserType';
 import Settings from '../settings/Settings';
+import ScriptUtil from '../util/ScriptUtil';
+import JitsiTrackError from '../../JitsiTrackError';
+import * as StatisticsEvents from '../../service/statistics/Events';
 
-const EventEmitter = require('events');
 const logger = require('jitsi-meet-logger').getLogger(__filename);
-const ScriptUtil = require('../util/ScriptUtil');
 
 /**
  * Stores all active {@link Statistics} instances.
             // requests to any third parties.
             && (Statistics.disableThirdPartyRequests !== true);
     if (this.callStatsIntegrationEnabled) {
-        loadCallStatsAPI(this.options.callStatsCustomScriptUrl);
+        if (!RTCBrowserType.isReactNative()) {
+            loadCallStatsAPI(this.options.callStatsCustomScriptUrl);
+        }
 
         if (!this.options.callStatsConfIDNamespace) {
             logger.warn('"callStatsConfIDNamespace" is not defined');

package.json

     "async": "0.9.0",
     "current-executing-script": "0.1.3",
     "jitsi-meet-logger": "jitsi/jitsi-meet-logger",
+    "react-native-callstats": "3.19.8",
     "retry": "0.6.1",
     "sdp-interop": "0.1.12",
     "sdp-simulcast": "0.2.1",