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Parse channel.hidden and channel.visible replayed by /sync without clear_history or channel - #6780
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gpunto
marked this pull request as ready for review
October 7, 2026 07:32
gpunto
enabled auto-merge
October 7, 2026 07:32
WalkthroughThe changes allow channel.hidden and channel.visible replay events to omit fields provided by newer backends. Channel-visible mapping creates a minimal channel when needed, and grouped event handling uses cached channel data for ID-and-type-only events. ChangesSync Replay Event Compatibility
Priority: ⬆️ High Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant ChannelVisibleEventDto
participant EventMapping
participant GroupAwareChatEventHandler
ChannelVisibleEventDto->>EventMapping: toDomain() with channel absent
EventMapping-->>GroupAwareChatEventHandler: ChannelVisibleEvent with minimal Channel
GroupAwareChatEventHandler->>GroupAwareChatEventHandler: Select cached channel for ID-and-type-only event
GroupAwareChatEventHandler->>GroupAwareChatEventHandler: Check group membership and return WatchAndAdd or Skip
Suggested reviewers: Merge Risk: 🔵 Low · up to A group-specific channel list can miss a channel when a replay omits channel data and no cached record exists. The narrow fallback is straightforward to fix. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Review comments at
@stream-chat-android-client/src/main/java/io/getstream/chat/android/client/internal/state/event/handler/grouped/internal/GroupAwareChatEventHandler.kt:
- Around line 67-72: Update the ChannelVisibleEvent branch in
GroupAwareChatEventHandler so a replay containing only channel ID and type with
no cachedChannel returns the existing WatchAndAdd result instead of applying
group filtering to incomplete data. Keep watchAndAddIfBelongsHere for cases
where the event or cache provides full channel data.
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📒 Files selected for processing (8)
stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/mapping/EventMapping.ktstream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/model/dto/EventDtos.ktstream-chat-android-client/src/main/java/io/getstream/chat/android/client/events/ChatEvent.ktstream-chat-android-client/src/main/java/io/getstream/chat/android/client/internal/state/event/handler/grouped/internal/GroupAwareChatEventHandler.ktstream-chat-android-client/src/test/java/io/getstream/chat/android/client/EventChatJsonProvider.ktstream-chat-android-client/src/test/java/io/getstream/chat/android/client/api2/mapping/EventMappingTestArguments.ktstream-chat-android-client/src/test/java/io/getstream/chat/android/client/internal/state/event/handler/grouped/internal/GroupAwareChatEventHandlerTest.ktstream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser/EventArguments.kt
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…hed channel to group it by
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Goal
Backends before v239.47.0 replay
channel.hiddenon/syncwithoutclear_history, andchannel.visiblewithoutchannel. Both fields were required, so a/syncthat replayed either event failed as a whole, and every missed event in it was lost.Closes AND-1611
Implementation
channel.hiddenwithoutclear_historyparses withclearHistory = false.channel.visiblewithoutchannelcarries a channel with only its type and id. The KDoc onChannelVisibleEvent.channelsays so.channel.visiblefrom the cached channel when there is one, so an event with only type and id still lands in the right group.Testing
clearHistory = true, hide and show another, then callgetSyncHistoryfor both: the response parses with both events. On develop the same call fails withRequired value 'clear_history' missing.🤖 Generated with Claude Code
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