Pbe 4247 fix network monitor (#153)

* Fix network monitor not raising any events

* remove redundant NetworkReachability from the example project - SDK now uses the INetworkMonitor that relies on NetworkReachability internally

Author: sierpinskid

Assets/Plugins/StreamChat/Core/LowLevelClient/ReconnectScheduler.cs

@@ -60,6 +60,8 @@ public void Dispose()
                 _client.Reconnecting -= OnReconnecting;
                 _client.ConnectionStateChanged -= OnConnectionStateChanged;
             }
+
+            _networkMonitor.NetworkAvailabilityChanged -= OnNetworkAvailabilityChanged;
         }
 
         public void SetReconnectStrategySettings(ReconnectStrategy reconnectStrategy, float? exponentialMinInterval,

Assets/Plugins/StreamChat/Core/LowLevelClient/StreamChatLowLevelClient.cs

@@ -348,6 +348,8 @@ public async Task DisconnectAsync(bool permanent = false)
 
         public void Update(float deltaTime)
         {
+            _networkMonitor?.Update();
+
 #if !STREAM_TESTS_ENABLED
             _updateCallReceived = true;
 #endif

Assets/Plugins/StreamChat/Libs/NetworkMonitors/UnityNetworkMonitor.cs

@@ -30,7 +30,7 @@ public void Update()
                 return;
             }
 
-            var wasReachable = IsReachable(_lastState.Value);
+            var wasReachable = IsReachable(prevLastState.Value);
 
             if (wasReachable && !isReachable)
             {

Assets/Plugins/StreamChat/SampleProject/Scripts/StreamChatClientBehaviour.cs

@@ -80,27 +80,6 @@ protected void Awake()
             }
         }
 
-        protected void Update()
-        {
-            if (_client == null || _missingCredentials)
-            {
-                return;
-            }
-
-            var isClientConnectedOrConnecting = _client.ConnectionState == ConnectionState.Connected ||
-                                                _client.ConnectionState == ConnectionState.Connecting;
-
-            var isNetworkReachable =
-                Application.internetReachability == NetworkReachability.ReachableViaCarrierDataNetwork ||
-                Application.internetReachability == NetworkReachability.ReachableViaLocalAreaNetwork;
-
-            if (!isClientConnectedOrConnecting && isNetworkReachable)
-            {
-                Debug.LogWarning("Client is not connected, but network is reachable. Force reconnect.");
-                _client.ConnectUserAsync(_authCredentialsAsset.Credentials);
-            }
-        }
-
         private IStreamChatClient _client;
         private bool _missingCredentials;