fix(ui): fix stopTyping unhandled exceptions when network is off or spotty. (#1296)

* feat(llc, ui): Introduce `keyStrokeHandler` to properly handle keyStrokes.

Signed-off-by: xsahil03x <[email protected]>

* chore(ui): update CHANGELOG.md

Signed-off-by: xsahil03x <[email protected]>

* test(llc): add key_stroke_handler_test.dart

Signed-off-by: xsahil03x <[email protected]>

packages/stream_chat_flutter/CHANGELOG.md

@@ -1,3 +1,10 @@
+## Upcoming
+
+🐞 Fixed
+
+- [[#882]](https://github.com/GetStream/stream-chat-flutter/issues/882) Lots of unhandled exceptions
+  when network is off or spotty.
+
 ## 4.4.1
 
 🐞 Fixed

packages/stream_chat_flutter/lib/src/message_input.dart

@@ -824,9 +824,14 @@ class MessageInputState extends State<MessageInput> {
       value = value.trim();
 
       final channel = StreamChannel.of(context).channel;
-      if (value.isNotEmpty) {
-        // ignore: no-empty-block
-        channel.keyStroke(widget.parentMessage?.id).catchError((e) {});
+      if (value.isNotEmpty &&
+          channel.ownCapabilities.contains(PermissionType.sendTypingEvents)) {
+        // Notify the server that the user started typing.
+        channel.keyStroke(widget.parentMessage?.id).onError(
+          (error, stackTrace) {
+            widget.onError?.call(error!, stackTrace);
+          },
+        );
       }
 
       var actionsLength = widget.actions.length;

packages/stream_chat_flutter/lib/src/v4/message_input/stream_message_input.dart

@@ -945,12 +945,14 @@ class StreamMessageInputState extends State<StreamMessageInput>
       value = value.trim();
 
       final channel = StreamChannel.of(context).channel;
-      if (channel.ownCapabilities.contains(PermissionType.sendTypingEvents) &&
-          value.isNotEmpty) {
-        channel
-            .keyStroke(_effectiveController.value.parentId)
-            // ignore: no-empty-block
-            .catchError((e) {});
+      if (value.isNotEmpty &&
+          channel.ownCapabilities.contains(PermissionType.sendTypingEvents)) {
+        // Notify the server that the user started typing.
+        channel.keyStroke(_effectiveController.message.parentId).onError(
+          (error, stackTrace) {
+            widget.onError?.call(error!, stackTrace);
+          },
+        );
       }
 
       var actionsLength = widget.actions.length;