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fix(transport): filter whitespace-only AI text responses #759

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fix(transport): filter whitespace-only AI text responses #759

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3 changes: 2 additions & 1 deletion packages/genui/lib/src/transport/a2ui_transport_adapter.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -65,7 +65,8 @@ class A2uiTransportAdapter implements Transport {
Stream<String> get incomingText => _pipeline
.where((e) => e is TextEvent)
.cast<TextEvent>()
.map((e) => e.text);
.map((e) => e.text.trim())
.where((text) => text.isNotEmpty);

/// A stream of A2UI messages parsed from the input.
@override
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10 changes: 6 additions & 4 deletions packages/genui_a2ui/lib/src/a2ui_agent_connector.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -206,8 +206,9 @@ class A2uiAgentConnector {
if (part is DataPart) {
_processA2uiMessages(part.data);
} else if (part is TextPart) {
if (!_textController.isClosed) {
_textController.add(part.text);
final String trimmedText = part.text.trim();
if (trimmedText.isNotEmpty && !_textController.isClosed) {
_textController.add(trimmedText);
}
}
}
Expand Down Expand Up @@ -241,8 +242,9 @@ class A2uiAgentConnector {
if (part is DataPart) {
_processA2uiMessages(part.data);
} else if (part is TextPart) {
if (!_textController.isClosed) {
_textController.add(part.text);
final String trimmedText = part.text.trim();
if (trimmedText.isNotEmpty && !_textController.isClosed) {
_textController.add(trimmedText);
}
}
}
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