Session migration (#72)

* impl

* retry logic

* simulate

* pass checks

* adjust log level

* retry condition

* fix simulate scenario params

* format

* use `RTCPeerConnectionState` instead of `RTCIceConnectionState`

* adjust retry

* additional check for completer

* more logging

* fix id

* pub

* change package

* doc update

* retry tests

* format

* apply suggestions

example/lib/exts.dart

@@ -154,4 +154,25 @@ extension LKExampleExt on BuildContext {
           ],
         ),
       );
+
+  Future<SimulateScenarioResult?> showSimulateScenarioDialog() =>
+      showDialog<SimulateScenarioResult>(
+        context: this,
+        builder: (ctx) => SimpleDialog(
+          title: const Text('Simulate Scenario'),
+          children: SimulateScenarioResult.values
+              .map((e) => SimpleDialogOption(
+                    child: Text(e.name),
+                    onPressed: () => Navigator.pop(ctx, e),
+                  ))
+              .toList(),
+        ),
+      );
+}
+
+enum SimulateScenarioResult {
+  nodeFailure,
+  migration,
+  serverLeave,
+  clear,
 }

example/lib/main.dart

@@ -2,10 +2,9 @@ import 'package:flutter/material.dart';
 import 'package:livekit_example/theme.dart';
 import 'package:logging/logging.dart';
 import 'package:intl/intl.dart';
-
 import 'pages/connect.dart';
 
-void main() {
+void main() async {
   final format = DateFormat('HH:mm:ss');
   // configure logs for debugging
   Logger.root.level = Level.FINE;

example/lib/widgets/controls.dart

@@ -149,6 +149,18 @@ class _ControlsWidgetState extends State<ControlsWidget> {
     }
   }
 
+  void _onTapSimulateScenario() async {
+    final result = await context.showSimulateScenarioDialog();
+    if (result != null) {
+      print('${result}');
+      await widget.room.simulateScenario(
+        nodeFailure: result == SimulateScenarioResult.nodeFailure ? true : null,
+        migration: result == SimulateScenarioResult.migration ? true : null,
+        serverLeave: result == SimulateScenarioResult.serverLeave ? true : null,
+      );
+    }
+  }
+
   void _onTapSendData() async {
     final result = await context.showSendDataDialog();
     if (result == true) {
@@ -238,6 +250,11 @@ class _ControlsWidgetState extends State<ControlsWidget> {
             icon: const Icon(EvaIcons.settings2),
             tooltip: 'Subscribe permission',
           ),
+          IconButton(
+            onPressed: _onTapSimulateScenario,
+            icon: const Icon(EvaIcons.alertTriangle),
+            tooltip: 'Simulate scenario',
+          ),
         ],
       ),
     );

example/pubspec.lock

@@ -50,6 +50,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.0.1"
+  csslib:
+    dependency: transitive
+    description:
+      name: csslib
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.17.1"
   dart_webrtc:
     dependency: transitive
     description:
@@ -84,7 +91,7 @@ packages:
       name: device_info_plus_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.3.0"
+    version: "2.3.0+1"
   device_info_plus_web:
     dependency: transitive
     description:
@@ -184,6 +191,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.2.0"
+  html:
+    dependency: transitive
+    description:
+      name: html
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.15.0"
   http:
     dependency: transitive
     description:
@@ -338,13 +352,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.1.0"
-  platform_detect:
-    dependency: transitive
-    description:
-      name: platform_detect
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.3"
   plugin_platform_interface:
     dependency: transitive
     description:
@@ -373,13 +380,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.0.2"
-  pub_semver:
-    dependency: transitive
-    description:
-      name: pub_semver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.0"
   shared_preferences:
     dependency: "direct main"
     description:
@@ -497,6 +497,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.3.0"
+  universal_html:
+    dependency: transitive
+    description:
+      name: universal_html
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.8"
+  universal_io:
+    dependency: transitive
+    description:
+      name: universal_io
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.4"
   uuid:
     dependency: transitive
     description:
@@ -511,6 +525,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.1"
+  web_browser_detect:
+    dependency: transitive
+    description:
+      name: web_browser_detect
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.2"
   webrtc_interface:
     dependency: transitive
     description: