[wip] Clear all persisted files of contents on opt out

pkgs/unified_analytics/lib/src/analytics.dart

@@ -262,6 +262,7 @@ class AnalyticsImpl implements Analytics {
   late final ConfigHandler _configHandler;
   final GAClient _gaClient;
   late final String _clientId;
+  late final File _clientIdFile;
   late final UserProperty userProperty;
   late final LogHandler _logHandler;
   final int toolsMessageVersion;
@@ -340,10 +341,9 @@ class AnalyticsImpl implements Analytics {
       _showMessage = true;
     }
 
-    _clientId = fs
-        .file(p.join(
-            homeDirectory.path, kDartToolDirectoryName, kClientIdFileName))
-        .readAsStringSync();
+    _clientIdFile = fs.file(
+        p.join(homeDirectory.path, kDartToolDirectoryName, kClientIdFileName));
+    _clientId = _clientIdFile.readAsStringSync();
 
     // Create the session instance that will be responsible for managing
     // all the sessions across every client tool using this pakage
@@ -464,6 +464,13 @@ class AnalyticsImpl implements Analytics {
   Future<void> setTelemetry(bool reportingBool) {
     _configHandler.setTelemetry(reportingBool);
 
+    // If telemetry is being set to false, then overwrite the
+    // CLIENT_ID file with a new id so that if the user chooses
+    // to opt back in at a later time, they will be a fresh new user
+    if (!reportingBool && _clientIdFile.existsSync()) {
+      Initializer.createClientIdFile(clientFile: _clientIdFile);
+    }
+
     // Construct the body of the request to signal
     // telemetry status toggling
     //

pkgs/unified_analytics/lib/src/initializer.dart

@@ -39,7 +39,7 @@ class Initializer {
   /// Creates the text file that will contain the client ID
   /// which will be used across all related tools for analytics
   /// reporting in GA
-  void createClientIdFile({required File clientFile}) {
+  static void createClientIdFile({required File clientFile}) {
     clientFile.createSync(recursive: true);
     clientFile.writeAsStringSync(Uuid().generateV4());
   }

pkgs/unified_analytics/test/workflow_test.dart

@@ -315,4 +315,31 @@ void main() {
             .endsWith('${secondTool.label}=$dateStamp,$secondVersion\n'),
         true);
   });
+
+  test('Opting out will reset the CLIENT_ID file', () async {
+    final Analytics firstAnalytics = Analytics.test(
+      tool: initialTool,
+      homeDirectory: home,
+      measurementId: measurementId,
+      apiSecret: apiSecret,
+      flutterChannel: flutterChannel,
+      toolsMessageVersion: toolsMessageVersion,
+      toolsMessage: toolsMessage,
+      flutterVersion: flutterVersion,
+      dartVersion: dartVersion,
+      fs: fs,
+      platform: platform,
+    );
+
+    // Grab the first client ID
+    final String firstClientId = clientIdFile.readAsStringSync();
+    expect(firstClientId.isNotEmpty, true);
+
+    // Opting out here will reset the CLIENT ID file
+    await firstAnalytics.setTelemetry(false);
+    final String secondClientId = clientIdFile.readAsStringSync();
+
+    expect(firstClientId != secondClientId, true);
+    expect(firstAnalytics.telemetryEnabled, false);
+  });
 }