Expose upload context with message id to FileUploader - #6668
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Add FileUploadContext, a read-only, SDK-constructed context handed to new FileUploader.sendFile/sendImage overloads. For message attachments it carries the id the message will be sent with, so a custom uploader can link the uploaded file to the message on an external system before the message reaches the Stream API. The new overloads delegate to the existing ones by default and are compiled as JVM default methods (-Xjvm-default=all), so current FileUploader implementations, Kotlin or Java, keep working unchanged. The context class has an internal constructor so new properties can be added without breaking implementers. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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WalkthroughThe upload pipeline now carries an optional message ID from attachment workers to custom file uploaders. A new ChangesMessage-aware upload flow
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The new upload context enables custom uploaders to associate files with messages, but the provided uploader examples can still lose that association for image uploads, and delayed retries may use a different active user than the one who initiated the message. The PR is mergeable with explicit owner awareness and a follow-up to correct the examples and confirm session-bound identity handling. Sequence Diagram(s)sequenceDiagram
participant UploadAttachmentsWorker
participant AttachmentUploader
participant ChatClient
participant MoshiChatApi
participant FileUploader
UploadAttachmentsWorker->>AttachmentUploader: uploadAttachment(message.id)
AttachmentUploader->>ChatClient: sendFile/sendImage(messageId)
ChatClient->>MoshiChatApi: api.sendFile/sendImage(messageId)
MoshiChatApi->>FileUploader: sendFile/sendImage(FileUploadContext)
FileUploader-->>MoshiChatApi: Result<UploadedFile>
Suggested reviewers: Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Description checkExplanation The description includes the goal, implementation details, linked issue, testing coverage, and manual verification. The UI and checklist sections are omitted, but they are not critical for this non-UI change. Full details: Docstring CoverageExplanation Docstring coverage is 14.29% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 63 functions across 16 files. (1 skipped: 1 unsupported.)
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Inline comments:
In
`@stream-chat-android-docs/src/main/java/io/getstream/chat/docs/java/client/helpers/MyFileUploader.java`:
- Around line 20-26: Add the context-aware sendImage override to both
MyFileUploader examples: in
stream-chat-android-docs/src/main/java/io/getstream/chat/docs/java/client/helpers/MyFileUploader.java:20-26,
implement sendImage(FileUploadContext, File, ProgressCallback) and use
uploadContext.getMessageId(); in
stream-chat-android-docs/src/main/kotlin/io/getstream/chat/docs/kotlin/client/helpers/MyFileUploader.kt:12-23,
implement sendImage(FileUploadContext, File, ProgressCallback?) and use
uploadContext.messageId. Preserve the existing upload result and error-handling
behavior.
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📒 Files selected for processing (17)
stream-chat-android-client/api/stream-chat-android-client.apistream-chat-android-client/src/main/java/io/getstream/chat/android/client/ChatClient.ktstream-chat-android-client/src/main/java/io/getstream/chat/android/client/api/ChatApi.ktstream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/MoshiChatApi.ktstream-chat-android-client/src/main/java/io/getstream/chat/android/client/attachment/AttachmentUploader.ktstream-chat-android-client/src/main/java/io/getstream/chat/android/client/attachment/worker/UploadAttachmentsWorker.ktstream-chat-android-client/src/main/java/io/getstream/chat/android/client/uploader/FileUploadContext.ktstream-chat-android-client/src/main/java/io/getstream/chat/android/client/uploader/FileUploader.ktstream-chat-android-client/src/test/java/io/getstream/chat/android/client/ChatClientChannelFileUploaderTests.ktstream-chat-android-client/src/test/java/io/getstream/chat/android/client/api2/MoshiChatApiTest.ktstream-chat-android-client/src/test/java/io/getstream/chat/android/client/attachment/AttachmentUploaderTests.ktstream-chat-android-client/src/test/java/io/getstream/chat/android/client/uploader/FileUploadContextTest.ktstream-chat-android-client/src/test/java/io/getstream/chat/android/client/uploader/FileUploaderTest.ktstream-chat-android-docs/src/main/java/io/getstream/chat/docs/java/client/helpers/MyFileUploader.javastream-chat-android-docs/src/main/kotlin/io/getstream/chat/docs/kotlin/client/helpers/MyFileUploader.ktstream-chat-android-state/src/test/java/io/getstream/chat/android/state/channel/controller/attachment/UploadAttachmentsIntegrationTests.ktstream-chat-android-state/src/test/java/io/getstream/chat/android/state/channel/controller/attachment/WhenUploadAttachmentsTests.kt
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Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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… it for Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Goal
Expose the id of the message an attachment belongs to to custom
FileUploaderimplementations, so apps uploading to their own CDN can link the uploaded file to the message on their side before the message reaches the Stream API.Closes AND-1453
Implementation
FileUploadContext, a read-only, SDK-constructed context (channel type/id, user id, message id). Its constructor is internal so new properties can be added later without breaking implementers.FileUploader.sendFile/sendImageoverloads receiving the context. They delegate to the existing overloads by default and compile as JVM default methods (-Xjvm-default=all), so currentFileUploaderimplementations, Kotlin or Java, keep working unchanged. The API diff is purely additive.UploadAttachmentsWorkerthroughAttachmentUploaderand internalChatClient/ChatApioverloads down toMoshiChatApi, which builds the context and calls the new overloads. Direct (non-message) uploads pass a null message id.Testing
MoshiChatApiTestasserts the uploader receives the context with the right channel/user/message id, null message id for plain uploads, and that the legacy overloads are no longer called directly.AttachmentUploaderTestscovers the message id being forwarded to the client call.Summary by CodeRabbit