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@philippotto philippotto commented Jun 26, 2025

This PR enables experimental (opt-in) collaborative proofreading (ignoring segment lists and meshes). Multiple users can split and merge agglomerates "in parallel". Synchronization happens as follows:

  • in contrast to the master, a mutex is not eagerly acquired anymore as soon as an annotation is opened (in case of the opt-in collab proofreading)
  • [identical to the current master] after each split or merge the annotation is saved to the server (the UI is blocked until saving succeeded)
  • in order to save, a mutex is acquired from the server. afterwards, it is ensured that the client knows about the most recent version that exists on the server. potential updates are polled from the server and incorporated¹ into the client.
  • after saving succeeded, the mutex is released and the UI is unblocked.

¹ the incorporation of the update actions is not trivial, because the frontend maintains a partial mapping from segment ids to agglomerate ids. the update actions only encode which segment ids were split or merged. simply mapping the affected segment ids to their (old or new?) agglomerate ids and refreshing all segment ids that map to these agglomerate ids might not be enough, because the mapping is partial and might have changed in between.
therefore, a first iteration simply reloads all segment ids. when the rest of the pr works, we can re-think this.

URL of deployed dev instance (used for testing):

  • https://___.webknossos.xyz

Steps to test:

  • test old annotation editing
    • single-user (others may edit == false)
    • multi-user (others may edit == true)
  • test new collaborative proofreading mode

TODOs:

  • prototype with mutex acquisition within proofread saga (we don't want this in the long run for various reasons, though)
  • implement ad-hoc mutex acuisition in save process
  • implement ensureNewestVersion mechanism to avoid conflicts during saving
    • avoid theoretical infinite waiting (look for todo comment around buffers.sliding<EnsureHasNewestVersionAction>(1))
  • the active segment in proofreading is marked with a cross. this is simply the anchor position of the active segment. however, that position can be changed by other users which would disturb the current user. the proofreading "anchor" should be stored separately (doesn't necessarily need to be persisted to the server, I think)
  • Fix agglomerate mapping activation
  • Toast "This annotation is not being edited anymore and available for editing. Reload the page to see its newest version and to edit it." appears, although it shouldn't be necessary.
  • ensure eager mutex acquisition still works for non-proofreading annotations (e.g. state.save.needsMutex boolean which the sagas act on)
    • ⚠️ currently, WK switches automatically to read-only if "others may edit" is false (I always enable this option during testing for now)
    • I tested: with disabled WkDevFlags.liveCollab: The others may edit feature works just as expected.
  • write tests
    • mock versioned agglomerate handling as backend substitute
    • write tests for "conflicts" (while saving, the backend reports a newer version created by another user)
      • merge with "foreign" merge
      • merge with "foreign" split
      • split with "foreign" merge
      • split with "foreign" split
      • multiple split actions in one version <- done by some tests seen user-wise. None of the tests inject multiple splits in one version, though.
      • agglomerate skeleton syncing -> deferred to a later pr
      • test local split splitting segment, but "foreign" merge adds a new edge that results in the split operation not fully splitting the segments
      • To all relevant new tests with othersMayEdit = true test that after the test the user does not still have the mutex. Check that releasing the mutex was called.
      • test polling / incorporating updates affecting unloaded segments
        • split: WIP
        • merge
    • also test the case where not all segment ids might be loaded in frontend
    • fix old tests
      • old proofreading tests
      • mutex tests (should be converted from the old manual-generator-execution to a more integration style (where all sagas run)
      • volume tracing integration tests
      • Fix annotation_saga.spec.ts. Tests seem to not have enough
      • others?
  • Agglomerate Skeletons need to be reloaded in case a foreign non-skeleton proofreading action changed the agglomerate skeleton -> deferred to a follow up pr
  • fix
    • inconsistent mappings on different clients after concurrent operations
    • [backend] avoid no such vertex in graph toast if a user tries to split an agglomerate that was already split. see [slack]
      • Cannot reproduce anymore
  • Implement rebase mechanism
  • Properly apply split operation and not do a hard refresh of the mapping information.
  • Add feature flag enabling concurrent annotation editing. Should always be turned off except when developing live is live.
  • forbid that update actions are emitted (i.e., users should not be allowed to do such actions) that can NOT be incorporated by other clients. otherwise, ensureNewestVersion would never terminate and other users will wait forever when trying to save. if this code version is never used in prod, it might not matter, though. Due to the feature flag, this shouldn't be a problem. This won't be available in production anyway. Therefore, this needs to be done later. As well as supporting all update actions.
  • avoid "read-only" flickering in navbar
    • refactor mayEdit state in store?
  • ensure that update action reconciliation is only done for proofreading actions (because other's are not supported yet)
    . -> is fine for now, as this will only be available via the feature flag.
  • [perf] avoid complete refresh of mapping and only refresh affected ids (with proper rebase mechanism)
  • [ ] make the new late-mutex approach opt-in (beta flag in sharing modal?)
    • [ ] discuss:IMO this only makes sense starting with milestone 4
    • [ ] disable all other tools if activated
    • [ ] disable segment list editing?
    • The state after M3 doesn't make a lot of sense. Therefore, I suggest simply turning off the live editing for now via the feature flag WkDevFlags.liveCollab
  • how to deal with outdated meshes?
    • auto-reload them? could be slow -> ok for now.
  • Get rid of the "This annotation is currently being edited by someone else. To avoid conflicts, you can only view it at the moment." toast.
  • clean up
    • refactor mappings.ts code so that it reacts to all setMappingActions? see comment in updateMappingWithMerge
  • ensure backend does accept split update actions when supervoxels are already split and merge update actions when supervoxels are already merged
    • fix duplicate edge problem
  • clean up initialAllowUpdate

More needed tests

  • Do not try to fetch mutex on not othersMayEdit annotations
    • initially
    • when switching active volume layer
    • when switching active tool
    • when changing othersMayEdit state
  • Release mutex in live collab scenario once switching from tool without liveCollab capabilities to one that has.

Known Bugs:

  • Cannot activate a mapping while othersMayEdit is turned on due to rebase mechanism not supporting updateMappingName action. Makes the tests quirky -> first init the mapping and everything, and then the test can finally make othersMayEdit = true.
  • Rebasing is done permanently, even when othersMayEdit is turned off
  • Mapping outdates get out of sync in some cases
  • https://scm.slack.com/archives/C5AKLAV0B/p1752142208929089
    • Cannot reproduce any longer
  • Agglomerate skeleton requests are not versioned. Local mapping might be older than a loaded agglomerate skeleton.

Issues:


(Please delete unneeded items, merge only when none are left open)

  • Added changelog entry (create a $PR_NUMBER.md file in unreleased_changes or use ./tools/create-changelog-entry.py)
  • Added migration guide entry if applicable (edit the same file as for the changelog)
  • Updated documentation if applicable
  • Adapted wk-libs python client if relevant API parts change
  • Removed dev-only changes like prints and application.conf edits
  • Considered common edge cases
  • Needs datastore update after deployment

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📝 Walkthrough

Walkthrough

This change introduces a mutex mechanism for annotation editing, enabling exclusive editing rights per user. It adds backend APIs for acquiring and releasing mutexes, updates the frontend to manage and display mutex state, and integrates Redux-Saga logic for continuous mutex acquisition and release. Related types and reducers are updated accordingly.

Changes

Files/Paths Change Summary
app/controllers/AnnotationController.scala, app/models/annotation/AnnotationMutexService.scala, app/models/annotation/AnnotationMutexDAO.scala Added backend API and service/DAO logic for releasing annotation mutexes.
conf/webknossos.latest.routes Added DELETE route for releasing annotation mutex.
frontend/javascripts/admin/rest_api.ts Added function to call backend mutex release API.
frontend/javascripts/viewer/model/sagas/annotation_saga.tsx, frontend/javascripts/viewer/model/sagas/saving/save_mutex_saga.tsx Moved and refactored mutex acquisition saga logic into a new module; integrated mutex state management.
frontend/javascripts/viewer/model/actions/annotation_actions.ts, frontend/javascripts/viewer/model/reducers/annotation_reducer.ts Added action and reducer logic for mutex acquisition state in Redux.
frontend/javascripts/viewer/model/actions/save_actions.ts, frontend/javascripts/viewer/model/sagas/saving/save_queue_draining.ts Added/used new save-related actions to coordinate mutex and save flow.
frontend/javascripts/viewer/default_state.ts, frontend/javascripts/viewer/store.ts, frontend/javascripts/viewer/model/reducers/reducer_helpers.ts Added isMutexAcquired property to annotation state and type definitions.
frontend/javascripts/viewer/api/wk_dev.ts Changed default debugging flags.
frontend/javascripts/test/sagas/annotation_saga.spec.ts Updated import path for saga under test.
frontend/javascripts/viewer/model/sagas/volume/proofread_saga.ts Simplified proofreading saga calls by removing unused parameters.
webknossos-tracingstore/app/com/scalableminds/webknossos/tracingstore/tracings/editablemapping/*.scala Made mag and agglomerate IDs optional in update actions; updated method signatures for optional mag.
frontend/javascripts/viewer/model/sagas/volume/mapping_saga.ts Added debugging saga to reload HDF5 mapping on demand.
frontend/javascripts/viewer/model/sagas/saving/save_saga.ts Adjusted polling interval and deferred local HDF5 mapping update logic.
frontend/javascripts/viewer/model/sagas/saving/save_queue_draining.ts Enhanced save queue draining with mutex acquisition and version checks; simplified conflict error handling.

Assessment against linked issues

Objective Addressed Explanation
Implement mutex-based exclusive annotation editing (Milestone 3, #8724)
Integrate mutex acquisition/release in frontend and backend (Milestone 3)
Update Redux state/types for mutex status (Milestone 3)
Prepare proofreading sagas for mutex integration (Milestone 3)

Assessment against linked issues: Out-of-scope changes

Code Change (file_path) Explanation
Changed default values of debugging flags (frontend/javascripts/viewer/api/wk_dev.ts) Debugging flag changes are unrelated to mutex/proofreading objectives in #8724.
Made mag and agglomerate ID fields optional in update actions (webknossos-tracingstore/...UpdateActions.scala) These changes are for backward compatibility and not directly related to mutex or proofreading.
Updated method signatures for optional mag (webknossos-tracingstore/...EditableMappingService.scala) Not directly related to mutex or proofreading; appears to be a separate API compatibility update.

Suggested labels

backend, new feature

Suggested reviewers

  • MichaelBuessemeyer

Poem

A mutex for my annotation,
Keeps my edits in one location.
With Redux and Sagas, I lock and I free,
So only one bunny can edit with glee.
Now proofreading’s safe,
No more race—
Just happy hopping in my editing space! 🐇✨

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  • Create PR with unit tests
  • Post copyable unit tests in a comment
  • Commit unit tests in branch live-m3

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@philippotto philippotto changed the title [WIP] Live collaboration for proofreading [WIP] Live Collab M3 - Proofreading (without segments) Jun 27, 2025
@fm3 fm3 changed the title [WIP] Live Collab M3 - Proofreading (without segments) [WIP] Live Collab M3 - Proofreading (without segments list) Jun 30, 2025
case _ =>
Fox.successful(())
}
} yield ()
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since we’re not using any info from the findOne other than whether to delete, we could merge the two into one query and just DELETE WHERE annotationId = a AND userId = u

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I changed that now in 3f66d4e – note that I could not test end-to-end since the frontend isn’t ready. Let me know if this doesn’t work as expected :)

Base automatically changed from refactor-saga-folders to live-m2 July 1, 2025 13:40
Base automatically changed from live-m2 to master July 7, 2025 09:37
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Actionable comments posted: 4

♻️ Duplicate comments (1)
app/models/annotation/AnnotationMutexService.scala (1)

71-80: Consider optimizing the mutex release operation.

The current approach uses separate findOne and deleteOne operations. As noted in a previous review, this could be optimized into a single query that deletes only if the user owns the mutex.

Consider replacing the current implementation with a single query:

-def release(annotationId: ObjectId, userId: ObjectId): Fox[Unit] =
-  for {
-    mutex <- annotationMutexDAO.findOne(annotationId).shiftBox
-    _ <- mutex match {
-      case Full(mutex) if mutex.userId == userId =>
-        annotationMutexDAO.deleteOne(annotationId).map(_ => ())
-      case _ =>
-        Fox.successful(())
-    }
-  } yield ()
+def release(annotationId: ObjectId, userId: ObjectId): Fox[Unit] =
+  annotationMutexDAO.deleteOneByUserAndAnnotation(annotationId, userId).map(_ => ())

And add to the DAO:

def deleteOneByUserAndAnnotation(annotationId: ObjectId, userId: ObjectId): Fox[Int] =
  run(q"DELETE FROM webknossos.annotation_mutexes WHERE _annotation = $annotationId AND _user = $userId".asUpdate)

This would be more efficient and eliminate the race condition between the find and delete operations.

🧹 Nitpick comments (3)
frontend/javascripts/viewer/model/sagas/volume/proofread_saga.ts (1)

361-361: Address unused variable warnings for preparatory mutex integration.

The annotationId variables are retrieved from state but not used because the mutex calls are commented out as part of the WIP development. To address the static analysis warnings while maintaining the preparatory code, consider prefixing the variables with underscore:

-const annotationId = yield* select((state) => state.annotation.annotationId);
+const _annotationId = yield* select((state) => state.annotation.annotationId);

This clearly indicates the variables are intentionally unused in the current state while being prepared for future integration.

Also applies to: 445-446, 710-710, 796-797, 902-902, 957-958, 1142-1149

frontend/javascripts/viewer/model/sagas/saving/save_mutex_saga.tsx (2)

29-29: Use import type for type-only imports.

The static analysis correctly identifies that EnsureMaySaveNowAction is only used as a type.

-import { EnsureMaySaveNowAction } from "viewer/model/actions/save_actions";
+import type { EnsureMaySaveNowAction } from "viewer/model/actions/save_actions";

93-106: Clarify the mutex acquisition flow for late-mutex approach.

The conditional logic based on DISABLE_EAGER_MUTEX_ACQUISITION implements different mutex acquisition strategies, but the flow could be clearer.

Consider adding comments to explain:

  1. When DISABLE_EAGER_MUTEX_ACQUISITION is true, mutex is acquired only when saving (late acquisition)
  2. When false, mutex is acquired eagerly when the annotation is opened
  3. The race condition between tryAcquireMutexContinuously and DONE_SAVING ensures mutex is released after save completes

This aligns with the PR objective of implementing a "late-mutex approach" as an opt-in feature.

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 80e2ed2 and 9aa961b.

📒 Files selected for processing (19)
  • app/controllers/AnnotationController.scala (1 hunks)
  • app/models/annotation/AnnotationMutexService.scala (2 hunks)
  • conf/webknossos.latest.routes (1 hunks)
  • frontend/javascripts/admin/rest_api.ts (1 hunks)
  • frontend/javascripts/test/sagas/annotation_saga.spec.ts (1 hunks)
  • frontend/javascripts/viewer/api/wk_dev.ts (2 hunks)
  • frontend/javascripts/viewer/default_state.ts (1 hunks)
  • frontend/javascripts/viewer/model/actions/annotation_actions.ts (3 hunks)
  • frontend/javascripts/viewer/model/actions/save_actions.ts (3 hunks)
  • frontend/javascripts/viewer/model/reducers/annotation_reducer.ts (1 hunks)
  • frontend/javascripts/viewer/model/reducers/reducer_helpers.ts (1 hunks)
  • frontend/javascripts/viewer/model/sagas/annotation_saga.tsx (2 hunks)
  • frontend/javascripts/viewer/model/sagas/saving/save_mutex_saga.tsx (1 hunks)
  • frontend/javascripts/viewer/model/sagas/saving/save_queue_draining.ts (5 hunks)
  • frontend/javascripts/viewer/model/sagas/saving/save_saga.ts (1 hunks)
  • frontend/javascripts/viewer/model/sagas/volume/proofread_saga.ts (7 hunks)
  • frontend/javascripts/viewer/store.ts (1 hunks)
  • webknossos-tracingstore/app/com/scalableminds/webknossos/tracingstore/tracings/editablemapping/EditableMappingService.scala (1 hunks)
  • webknossos-tracingstore/app/com/scalableminds/webknossos/tracingstore/tracings/editablemapping/EditableMappingUpdateActions.scala (2 hunks)
🧰 Additional context used
🧠 Learnings (11)
📓 Common learnings
Learnt from: MichaelBuessemeyer
PR: scalableminds/webknossos#8352
File: conf/evolutions/126-credit-transactions.sql:89-130
Timestamp: 2025-01-27T15:01:17.868Z
Learning: Team prefers to discuss concurrency handling approaches (like transaction isolation) during the review phase rather than as individual suggestions.
Learnt from: philippotto
PR: scalableminds/webknossos#8542
File: frontend/javascripts/viewer/model/sagas/volumetracing_saga.tsx:0-0
Timestamp: 2025-05-30T12:36:09.930Z
Learning: The WebKnossos frontend follows Redux immutability principles where reducers act immutably and create new state objects when changes occur. This makes reference equality checks (like `prevVolumeTracing.segments !== volumeTracing.segments`) reliable and efficient for detecting actual state changes, allowing memoization to work correctly.
frontend/javascripts/test/sagas/annotation_saga.spec.ts (1)
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/sagas/proofread_saga.ts:1039-1039
Timestamp: 2024-11-22T17:18:04.217Z
Learning: In `frontend/javascripts/oxalis/model/sagas/proofread_saga.ts`, when calling `getMagInfo`, the use of `volumeTracingLayer.resolutions` is intentional and should not be changed to `volumeTracingLayer.mags`.
frontend/javascripts/viewer/model/reducers/annotation_reducer.ts (1)
Learnt from: knollengewaechs
PR: scalableminds/webknossos#8492
File: frontend/javascripts/viewer/model/sagas/skeletontracing_saga.ts:671-674
Timestamp: 2025-05-15T19:44:16.110Z
Learning: Visibility updates for user bounding boxes are intentionally handled separately from other property updates, with dedicated update actions for visibility changes.
frontend/javascripts/viewer/model/sagas/saving/save_saga.ts (1)
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/sagas/proofread_saga.ts:1039-1039
Timestamp: 2024-11-22T17:18:04.217Z
Learning: In `frontend/javascripts/oxalis/model/sagas/proofread_saga.ts`, when calling `getMagInfo`, the use of `volumeTracingLayer.resolutions` is intentional and should not be changed to `volumeTracingLayer.mags`.
app/models/annotation/AnnotationMutexService.scala (3)
Learnt from: frcroth
PR: scalableminds/webknossos#8236
File: webknossos-datastore/app/com/scalableminds/webknossos/datastore/services/mesh/MeshFileService.scala:170-173
Timestamp: 2025-04-23T08:51:57.756Z
Learning: In the webknossos codebase, classes extending `FoxImplicits` have access to an implicit conversion from `Option[A]` to `Fox[A]`, where `None` is converted to an empty Fox that fails gracefully in for-comprehensions.
Learnt from: MichaelBuessemeyer
PR: scalableminds/webknossos#8352
File: app/models/organization/CreditTransactionService.scala:0-0
Timestamp: 2025-01-27T12:06:42.865Z
Learning: In Scala's for-comprehension with Fox (Future-like type), the `<-` operator ensures sequential execution. If any step fails, the entire chain short-circuits and returns early, preventing subsequent operations from executing. This makes it safe to perform validation checks before database operations.
Learnt from: frcroth
PR: scalableminds/webknossos#8236
File: webknossos-datastore/app/com/scalableminds/webknossos/datastore/services/mesh/NeuroglancerPrecomputedMeshFileService.scala:161-166
Timestamp: 2025-04-28T14:18:04.368Z
Learning: In Scala for-comprehensions with the Fox error handling monad, `Fox.fromBool()` expressions should use the `<-` binding operator instead of the `=` assignment operator to properly propagate error conditions. Using `=` will cause validation failures to be silently ignored.
frontend/javascripts/viewer/model/sagas/saving/save_mutex_saga.tsx (1)
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/sagas/proofread_saga.ts:1039-1039
Timestamp: 2024-11-22T17:18:04.217Z
Learning: In `frontend/javascripts/oxalis/model/sagas/proofread_saga.ts`, when calling `getMagInfo`, the use of `volumeTracingLayer.resolutions` is intentional and should not be changed to `volumeTracingLayer.mags`.
frontend/javascripts/viewer/model/sagas/volume/proofread_saga.ts (1)
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/sagas/proofread_saga.ts:1039-1039
Timestamp: 2024-11-22T17:18:04.217Z
Learning: In `frontend/javascripts/oxalis/model/sagas/proofread_saga.ts`, when calling `getMagInfo`, the use of `volumeTracingLayer.resolutions` is intentional and should not be changed to `volumeTracingLayer.mags`.
webknossos-tracingstore/app/com/scalableminds/webknossos/tracingstore/tracings/editablemapping/EditableMappingService.scala (6)
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/sagas/proofread_saga.ts:1039-1039
Timestamp: 2024-11-22T17:18:04.217Z
Learning: In `frontend/javascripts/oxalis/model/sagas/proofread_saga.ts`, when calling `getMagInfo`, the use of `volumeTracingLayer.resolutions` is intentional and should not be changed to `volumeTracingLayer.mags`.
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/sagas/volumetracing_saga.tsx:433-434
Timestamp: 2024-11-22T17:19:07.947Z
Learning: In the codebase, certain usages of `segmentationLayer.resolutions` are intentionally retained and should not be changed to `segmentationLayer.mags` during refactoring.
Learnt from: frcroth
PR: scalableminds/webknossos#8609
File: app/models/dataset/Dataset.scala:753-775
Timestamp: 2025-05-12T13:07:29.637Z
Learning: In the `updateMags` method of DatasetMagsDAO (Scala), the code handles different dataset types distinctly:
1. Non-WKW datasets have `magsOpt` populated and use the first branch which includes axisOrder, channelIndex, and credentialId.
2. WKW datasets will have `wkwResolutionsOpt` populated and use the second branch which includes cubeLength.
3. The final branch is a fallback for legacy data.
This ensures appropriate fields are populated for each dataset type.
Learnt from: philippotto
PR: scalableminds/webknossos#8602
File: frontend/javascripts/oxalis/model/volumetracing/volume_annotation_sampling.ts:365-366
Timestamp: 2025-05-07T06:17:32.810Z
Learning: The parameter in applyVoxelMap was renamed from `sliceCount` to `sliceOffset` to better reflect its purpose, but this doesn't affect existing call sites since JavaScript/TypeScript function calls are position-based.
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/reducers/skeletontracing_reducer_helpers.ts:125-125
Timestamp: 2024-11-22T17:17:39.914Z
Learning: In the `createNode` function within `skeletontracing_reducer_helpers.ts`, the property `resolution` is intentionally kept even when the parameter is renamed to `mag`.
Learnt from: frcroth
PR: scalableminds/webknossos#8236
File: webknossos-datastore/app/com/scalableminds/webknossos/datastore/services/mesh/MeshFileService.scala:170-173
Timestamp: 2025-04-23T08:51:57.756Z
Learning: In the webknossos codebase, classes extending `FoxImplicits` have access to an implicit conversion from `Option[A]` to `Fox[A]`, where `None` is converted to an empty Fox that fails gracefully in for-comprehensions.
frontend/javascripts/viewer/model/sagas/saving/save_queue_draining.ts (1)
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/sagas/proofread_saga.ts:1039-1039
Timestamp: 2024-11-22T17:18:04.217Z
Learning: In `frontend/javascripts/oxalis/model/sagas/proofread_saga.ts`, when calling `getMagInfo`, the use of `volumeTracingLayer.resolutions` is intentional and should not be changed to `volumeTracingLayer.mags`.
frontend/javascripts/viewer/model/sagas/annotation_saga.tsx (1)
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/sagas/proofread_saga.ts:1039-1039
Timestamp: 2024-11-22T17:18:04.217Z
Learning: In `frontend/javascripts/oxalis/model/sagas/proofread_saga.ts`, when calling `getMagInfo`, the use of `volumeTracingLayer.resolutions` is intentional and should not be changed to `volumeTracingLayer.mags`.
webknossos-tracingstore/app/com/scalableminds/webknossos/tracingstore/tracings/editablemapping/EditableMappingUpdateActions.scala (1)
Learnt from: frcroth
PR: scalableminds/webknossos#8609
File: app/models/dataset/Dataset.scala:753-775
Timestamp: 2025-05-12T13:07:29.637Z
Learning: In the `updateMags` method of DatasetMagsDAO (Scala), the code handles different dataset types distinctly:
1. Non-WKW datasets have `magsOpt` populated and use the first branch which includes axisOrder, channelIndex, and credentialId.
2. WKW datasets will have `wkwResolutionsOpt` populated and use the second branch which includes cubeLength.
3. The final branch is a fallback for legacy data.
This ensures appropriate fields are populated for each dataset type.
🧬 Code Graph Analysis (2)
app/models/annotation/AnnotationMutexService.scala (2)
util/src/main/scala/com/scalableminds/util/tools/Fox.scala (2)
  • shiftBox (296-296)
  • successful (53-56)
app/utils/sql/SqlInterpolation.scala (2)
  • q (19-38)
  • asUpdate (73-73)
frontend/javascripts/viewer/model/sagas/saving/save_queue_draining.ts (2)
frontend/javascripts/viewer/model/actions/save_actions.ts (2)
  • dispatchEnsureMaySaveNowAsync (146-151)
  • doneSavingAction (153-156)
frontend/javascripts/libs/window.ts (2)
  • alert (18-18)
  • location (60-60)
🪛 Biome (1.9.4)
frontend/javascripts/viewer/model/sagas/saving/save_saga.ts

[error] 55-55: Unexpected constant condition.

(lint/correctness/noConstantCondition)

frontend/javascripts/viewer/model/sagas/saving/save_mutex_saga.tsx

[error] 29-29: All these imports are only used as types.

Importing the types with import type ensures that they are removed by the compilers and avoids loading unnecessary modules.
Safe fix: Use import type.

(lint/style/useImportType)

frontend/javascripts/viewer/model/sagas/volume/proofread_saga.ts

[error] 361-361: This variable is unused.

Unused variables usually are result of incomplete refactoring, typos and other source of bugs.
Unsafe fix: If this is intentional, prepend annotationId with an underscore.

(lint/correctness/noUnusedVariables)


[error] 710-710: This variable is unused.

Unused variables usually are result of incomplete refactoring, typos and other source of bugs.
Unsafe fix: If this is intentional, prepend annotationId with an underscore.

(lint/correctness/noUnusedVariables)


[error] 902-902: This variable is unused.

Unused variables usually are result of incomplete refactoring, typos and other source of bugs.
Unsafe fix: If this is intentional, prepend annotationId with an underscore.

(lint/correctness/noUnusedVariables)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)
  • GitHub Check: build-smoketest-push
  • GitHub Check: backend-tests
🔇 Additional comments (19)
webknossos-tracingstore/app/com/scalableminds/webknossos/tracingstore/tracings/editablemapping/EditableMappingUpdateActions.scala (2)

14-14: Well-designed backward compatibility approach.

The conversion of agglomerateId and mag fields to Option types is a clean approach for supporting legacy update actions while maintaining type safety. The comment provides clear context for why these fields are now optional.

Also applies to: 19-19


39-40: Consistent optional field implementation.

The same backward compatibility pattern is correctly applied to MergeAgglomerateUpdateAction with both agglomerateId1 and agglomerateId2 fields becoming optional, maintaining consistency with the SplitAgglomerateUpdateAction changes.

Also applies to: 45-45

webknossos-tracingstore/app/com/scalableminds/webknossos/tracingstore/tracings/editablemapping/EditableMappingService.scala (2)

188-188: Proper method signature alignment with update actions.

The parameter change from mag: Vec3Int to magOpt: Option[Vec3Int] correctly aligns with the optional fields in the update actions, maintaining consistency across the codebase.

Also applies to: 191-191


196-196: Effective validation for optional parameters.

The validation logic properly handles the optional magOpt parameter by converting it to a Fox with a descriptive error message when required. This ensures that the method fails gracefully when mandatory data is missing while supporting the backward compatibility requirements.

Also applies to: 199-199

frontend/javascripts/test/sagas/annotation_saga.spec.ts (1)

15-15: LGTM: Import path correctly updated for refactored saga.

The import path update aligns with the refactoring where acquireAnnotationMutexMaybe was moved to a dedicated mutex saga module, improving code organization.

frontend/javascripts/viewer/store.ts (1)

149-149: LGTM: Mutex state flag properly added to Annotation type.

The isMutexAcquired boolean property is correctly defined as readonly, maintaining Redux immutability principles and providing clear state tracking for mutex management.

frontend/javascripts/viewer/default_state.ts (1)

181-181: LGTM: Appropriate default value for mutex state.

Initializing isMutexAcquired to false is the correct default since annotations start without mutex acquisition, maintaining consistency with the expected initial state.

conf/webknossos.latest.routes (1)

158-158: LGTM: Well-structured REST endpoint for mutex release.

The DELETE route for /annotations/:id/mutex correctly complements the existing POST route for mutex acquisition, following REST conventions and maintaining consistent route structure.

frontend/javascripts/viewer/model/reducers/reducer_helpers.ts (1)

159-159: LGTM: Consistent mutex flag initialization in conversion function.

Adding isMutexAcquired: false ensures that server-to-frontend annotation conversions maintain consistent object structure with the default state initialization.

frontend/javascripts/viewer/model/reducers/annotation_reducer.ts (1)

140-145: LGTM! Clean implementation of the mutex state reducer.

The new action case follows the established patterns in the file and correctly uses the updateKey helper function to maintain immutability. The implementation is consistent with other reducer cases in the file.

frontend/javascripts/admin/rest_api.ts (1)

732-736: LGTM! Clean implementation of the mutex release API.

The function follows the established patterns in the file and correctly uses the HTTP DELETE method for releasing the mutex. The implementation is consistent with the existing acquireAnnotationMutex function and integrates well with the broader mutex management feature.

frontend/javascripts/viewer/api/wk_dev.ts (1)

14-14: Good debugging setup for development.

Enabling these debug flags will help with development and troubleshooting of the new mutex functionality. The enhanced logging and version display should provide valuable insights during the WIP development phase.

Also applies to: 31-31

app/controllers/AnnotationController.scala (1)

457-463: Clean implementation of the mutex release endpoint.

The controller method follows established patterns in the codebase, uses appropriate error handling with Fox, and includes performance monitoring via logTime. The implementation is straightforward and correctly delegates to the service layer.

frontend/javascripts/viewer/model/actions/annotation_actions.ts (1)

55-55: Well-implemented action creator for mutex state management.

The new setIsMutexAcquiredAction follows established patterns in the codebase, is properly typed, and correctly integrated into the action type union. The implementation is clean and straightforward.

Also applies to: 91-91, 181-185

frontend/javascripts/viewer/model/sagas/annotation_saga.tsx (1)

2-2: Clean refactoring of mutex logic!

The relocation of mutex acquisition logic to a dedicated module improves code organization and separation of concerns.

Also applies to: 9-9, 14-17, 34-34

frontend/javascripts/viewer/model/actions/save_actions.ts (1)

29-30: Well-structured save flow control actions!

The new actions and async dispatch helper follow the established patterns in the codebase. The Deferred pattern for callback synchronization is consistent with existing implementations.

Also applies to: 43-45, 140-156

frontend/javascripts/viewer/model/sagas/saving/save_queue_draining.ts (2)

68-70: Good integration of save flow control!

The addition of dispatchEnsureMaySaveNowAsync and doneSavingAction properly coordinates save operations with mutex state.

Also applies to: 102-103


206-210: Verify the simplified 409 conflict handling behavior.

The removal of the flag and indefinite sleep simplifies the code, but may change behavior:

  • Previously, only one alert was shown due to the flag
  • The indefinite sleep prevented further save attempts
  • Now the error is thrown immediately after reload

Since multiple retries could trigger multiple alerts before the page reloads, consider if this behavior change is intentional. The immediate throw after reload seems correct as the page will be refreshed anyway.

frontend/javascripts/viewer/model/sagas/saving/save_mutex_saga.tsx (1)

104-104: Add missing yield operator.*

The call effect requires yield* to properly execute the saga.

-      if (doneSaving) {
-        yield call(releaseMutex);
-      }
+      if (doneSaving) {
+        yield* call(releaseMutex);
+      }

Likely an incorrect or invalid review comment.

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Actionable comments posted: 5

♻️ Duplicate comments (4)
frontend/javascripts/viewer/model/sagas/saving/save_mutex_saga.tsx (3)

39-40: Fix TODO typo and make the flag configurable.


177-188: Consider using a finally block as mentioned in the comment.


225-235: Fix the releaseMutex implementation to actually release the mutex.

frontend/javascripts/viewer/model/sagas/saving/save_saga.ts (1)

59-60: Fix the disabled early return condition and unclear comment.

🧹 Nitpick comments (1)
frontend/javascripts/viewer/model/sagas/volume/mapping_saga.ts (1)

158-205: Well-structured debugging feature with clear documentation.

The addition of DEBUG__RELOAD_HDF5_MAPPING action handler and supporting functions provides a useful debugging capability. The code is well-documented with clear comments explaining the debugging purpose.

One minor issue: The error message on line 200 mentions "splitAgglomerate" but should be more generic since this is a general HDF5 reloading function:

-    throw new Error("Could not apply splitAgglomerate because no active mapping was found.");
+    throw new Error("Could not reload HDF5 mapping because no active mapping was found.");
📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 9aa961b and 29a1608.

📒 Files selected for processing (8)
  • frontend/javascripts/viewer/api/wk_dev.ts (1 hunks)
  • frontend/javascripts/viewer/model/actions/save_actions.ts (3 hunks)
  • frontend/javascripts/viewer/model/sagas/saving/save_mutex_saga.tsx (1 hunks)
  • frontend/javascripts/viewer/model/sagas/saving/save_queue_draining.ts (5 hunks)
  • frontend/javascripts/viewer/model/sagas/saving/save_saga.ts (7 hunks)
  • frontend/javascripts/viewer/model/sagas/volume/mapping_saga.ts (2 hunks)
  • frontend/javascripts/viewer/model/sagas/volume/proofread_saga.ts (6 hunks)
  • frontend/javascripts/viewer/model/sagas/volume/update_actions.ts (1 hunks)
🚧 Files skipped from review as they are similar to previous changes (4)
  • frontend/javascripts/viewer/api/wk_dev.ts
  • frontend/javascripts/viewer/model/sagas/volume/proofread_saga.ts
  • frontend/javascripts/viewer/model/sagas/saving/save_queue_draining.ts
  • frontend/javascripts/viewer/model/actions/save_actions.ts
🧰 Additional context used
🧠 Learnings (5)
📓 Common learnings
Learnt from: MichaelBuessemeyer
PR: scalableminds/webknossos#8352
File: conf/evolutions/126-credit-transactions.sql:89-130
Timestamp: 2025-01-27T15:01:17.868Z
Learning: Team prefers to discuss concurrency handling approaches (like transaction isolation) during the review phase rather than as individual suggestions.
Learnt from: philippotto
PR: scalableminds/webknossos#8542
File: frontend/javascripts/viewer/model/sagas/volumetracing_saga.tsx:0-0
Timestamp: 2025-05-30T12:36:09.930Z
Learning: The WebKnossos frontend follows Redux immutability principles where reducers act immutably and create new state objects when changes occur. This makes reference equality checks (like `prevVolumeTracing.segments !== volumeTracing.segments`) reliable and efficient for detecting actual state changes, allowing memoization to work correctly.
frontend/javascripts/viewer/model/sagas/saving/save_mutex_saga.tsx (2)
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/sagas/proofread_saga.ts:1039-1039
Timestamp: 2024-11-22T17:18:04.217Z
Learning: In `frontend/javascripts/oxalis/model/sagas/proofread_saga.ts`, when calling `getMagInfo`, the use of `volumeTracingLayer.resolutions` is intentional and should not be changed to `volumeTracingLayer.mags`.
Learnt from: robert-oleynik
PR: scalableminds/webknossos#8393
File: frontend/javascripts/admin/auth/passkeys_view.tsx:29-35
Timestamp: 2025-07-09T07:30:57.149Z
Learning: In the webknossos project, error handling and user notifications are handled at the API function level (e.g., `removeWebAuthnKey`, `fetchPasskeys`) rather than in the UI components, so additional try-catch blocks in the UI layer are unnecessary.
frontend/javascripts/viewer/model/sagas/volume/update_actions.ts (4)
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/sagas/proofread_saga.ts:1039-1039
Timestamp: 2024-11-22T17:18:04.217Z
Learning: In `frontend/javascripts/oxalis/model/sagas/proofread_saga.ts`, when calling `getMagInfo`, the use of `volumeTracingLayer.resolutions` is intentional and should not be changed to `volumeTracingLayer.mags`.
Learnt from: philippotto
PR: scalableminds/webknossos#8602
File: frontend/javascripts/oxalis/model/volumetracing/volume_annotation_sampling.ts:365-366
Timestamp: 2025-05-07T06:17:32.810Z
Learning: The parameter in applyVoxelMap was renamed from `sliceCount` to `sliceOffset` to better reflect its purpose, but this doesn't affect existing call sites since JavaScript/TypeScript function calls are position-based.
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/reducers/skeletontracing_reducer_helpers.ts:125-125
Timestamp: 2024-11-22T17:17:39.914Z
Learning: In the `createNode` function within `skeletontracing_reducer_helpers.ts`, the property `resolution` is intentionally kept even when the parameter is renamed to `mag`.
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/geometries/materials/plane_material_factory.ts:568-585
Timestamp: 2024-11-22T17:18:43.411Z
Learning: In the file `frontend/javascripts/oxalis/geometries/materials/plane_material_factory.ts`, the uniform name `allResolutions` should remain unchanged to maintain consistency with the shader code.
frontend/javascripts/viewer/model/sagas/volume/mapping_saga.ts (2)
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/sagas/proofread_saga.ts:1039-1039
Timestamp: 2024-11-22T17:18:04.217Z
Learning: In `frontend/javascripts/oxalis/model/sagas/proofread_saga.ts`, when calling `getMagInfo`, the use of `volumeTracingLayer.resolutions` is intentional and should not be changed to `volumeTracingLayer.mags`.
Learnt from: philippotto
PR: scalableminds/webknossos#8542
File: frontend/javascripts/viewer/model/sagas/volumetracing_saga.tsx:0-0
Timestamp: 2025-05-30T12:36:09.930Z
Learning: The WebKnossos frontend follows Redux immutability principles where reducers act immutably and create new state objects when changes occur. This makes reference equality checks (like `prevVolumeTracing.segments !== volumeTracing.segments`) reliable and efficient for detecting actual state changes, allowing memoization to work correctly.
frontend/javascripts/viewer/model/sagas/saving/save_saga.ts (2)
Learnt from: dieknolle3333
PR: scalableminds/webknossos#8168
File: frontend/javascripts/oxalis/model/sagas/proofread_saga.ts:1039-1039
Timestamp: 2024-11-22T17:18:04.217Z
Learning: In `frontend/javascripts/oxalis/model/sagas/proofread_saga.ts`, when calling `getMagInfo`, the use of `volumeTracingLayer.resolutions` is intentional and should not be changed to `volumeTracingLayer.mags`.
Learnt from: philippotto
PR: scalableminds/webknossos#8542
File: frontend/javascripts/viewer/model/sagas/volumetracing_saga.tsx:0-0
Timestamp: 2025-05-30T12:36:09.930Z
Learning: The WebKnossos frontend follows Redux immutability principles where reducers act immutably and create new state objects when changes occur. This makes reference equality checks (like `prevVolumeTracing.segments !== volumeTracing.segments`) reliable and efficient for detecting actual state changes, allowing memoization to work correctly.
🧬 Code Graph Analysis (3)
frontend/javascripts/viewer/model/sagas/saving/save_mutex_saga.tsx (1)
frontend/javascripts/libs/window.ts (1)
  • location (60-60)
frontend/javascripts/viewer/model/sagas/volume/update_actions.ts (2)
frontend/javascripts/viewer/constants.ts (1)
  • Vector3 (13-13)
frontend/javascripts/viewer/store.ts (1)
  • NumberLike (362-362)
frontend/javascripts/viewer/model/sagas/volume/mapping_saga.ts (3)
frontend/javascripts/viewer/model.ts (2)
  • getSegmentationLayers (93-98)
  • getLayerByName (270-276)
frontend/javascripts/viewer/store.ts (1)
  • ActiveMappingInfo (366-374)
frontend/javascripts/viewer/model/actions/settings_actions.ts (1)
  • setMappingAction (205-227)
🪛 Biome (1.9.4)
frontend/javascripts/viewer/model/sagas/saving/save_saga.ts

[error] 60-60: Unexpected constant condition.

(lint/correctness/noConstantCondition)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)
  • GitHub Check: build-smoketest-push
  • GitHub Check: backend-tests
🔇 Additional comments (2)
frontend/javascripts/viewer/model/sagas/volume/update_actions.ts (1)

897-955: Good approach to API evolution with backward compatibility!

The refactoring to make agglomerateId, mag, agglomerateId1, and agglomerateId2 optional fields clearly maintains backward compatibility while simplifying the current API. The comments explaining that these fields are "unused in back-end but may exist in older update actions" provide excellent documentation for future maintainers.

frontend/javascripts/viewer/model/sagas/volume/mapping_saga.ts (1)

166-174: Clean implementation of clearActiveMapping.

The function properly creates a new empty Map and dispatches the appropriate action to clear the mapping state. This will be useful for the deferred mapping updates in save_saga.ts.

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if (process.env.IS_TESTING) {
// in test context, the mapping.ts code is not executed (which is usually responsible
// for finishing the initialization).
// todop: this is quite messy. refactor?
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a new issue would make sense, because it's not strictly related to live is live.

};

// rebaseRelevantServerAnnotationState stores rebasing relevant information of the annotation.
// It always has the newest version of this information which is synced with the backend.
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I don't understand this comment. can you make it more precise (and maybe add an example)? I also don't understand how the "always" invariant is ensured. theinformation really can't get outdated?

Comment on lines 630 to 631
// SaveReducer needs to be behind Settings and Volumetracing reducer to react to changes SET MAPPING changes.
SaveReducer,
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ok, the comment is not true anymore, but somehow it was necessary to change it up? maybe add a comment that explains why that is necessary now?

segmentId1: number | undefined;
segmentId2: number | undefined;
// Needed in live collab setting to notice changes of loaded agglomerates done by other users.
// agglomerateId1 and agglomerateId2 are needed in live collab setting to notice changes of loaded agglomerates done by other users.
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can you add to the comment when will it be undefined?

Comment on lines +477 to +487
// Should never be sent to the backend as the backend does neither understand this action
// nor does it have the property activeTreeId for a skeletonTracing.
// Only used to correctly keep track of the active tree property during rebasing.
// Reason: There is a mismatch between the frontend store actions and the update actions.
// The store action createTree also sets the activeNodeId and activeTreeId, but the update action createTree does not.
// If we would change that via also applying activeNodeId and activeTreeId for createTree update actions
// this breaks the deleteEdge store action: This store action maps to the following update actions:
// createTree, moveTreeComponents, deleteEdge. Where the createTree update action should not
// set activeNodeId and activeTreeId when applied. Therefore, this action tracks whether the activeTreeId should change.
// Tracking of activeNodeId is already handled by updateActiveNode (see above). This action is understood by the backend.
// So no problem there.
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unfortunately, I can't really follow 🙈 I'd suggest to clarify this in a call.

expect(isUpdatingAllowed).toBe(true);
});

it<WebknossosTestContext>("An annotation with isUpdatingCurrentlyAllowed = true and othersMayEdit = true should try to acquire the annotation mutex not in liveCollab.", async (context: WebknossosTestContext) => {
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"not in liveCollab" is very hard to read. how about:
A not-liveCollab annotation with isUpdatingCurrentlyAllowed = true and othersMayEdit = true should try to acquire the annotation mutex.

},
);
mockInitialBucketAndAgglomerateData(context);
// Give mutex saga time to potentially acquire the mutex. This should not happen!
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why "this should not happen"? in othersMayEdit==true, it should happen, right?

Comment on lines +363 to +364
// Visibility updates are user-specific and should only be incorporated
// if reapplied during rebasing the users actions from the save queue.
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Suggested change
// Visibility updates are user-specific and should only be incorporated
// if reapplied during rebasing the users actions from the save queue.
// Visibility updates are user-specific and should only be incorporated
// when rebasing the user's actions from the save queue.

.filter((g) => g.isExpanded)
.map((g) => g.groupId),
);
const actionGroupIds = new Set(groupIds);
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adding "set" to the name makes the semantics of the variable way clearer than adding "action".

Suggested change
const actionGroupIds = new Set(groupIds);
const groupIdSet = new Set(groupIds);

needs to be renamed in the other spots, too.

Comment on lines -94 to -95
// These update actions are user specific and don't need to be incorporated here
// because they are from another user.
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how about moving this comment to case "updateSegmentGroupsExpandedState": and changing it to "... user specific and only need to be applied if these actions originate from the current user (this happens when rebasing such actions)".

try {
const { canEdit, blockedByUser } = yield* call(acquireAnnotationMutex, annotationId);
if (!canEdit) {
// TODOM: Think of a better way to handle this. This should usually never happen only if a client disconnects for a longer time while saving.
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todo

if (newOnlyRequiredOnSave !== mutexLogicState.onlyRequiredOnSave) {
mutexLogicState.onlyRequiredOnSave = newOnlyRequiredOnSave;

// TODO: also check for livecollab flag and editable mapping locked and so on.
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todo

groupId,
name,
children,
isExpanded: false, // TODOM: check whether this does not change the default behaviour
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todo

try {
const { canEdit, blockedByUser } = yield* call(acquireAnnotationMutex, annotationId);
if (!canEdit) {
// TODOM: Think of a better way to handle this. This should usually never happen only if a client disconnects for a longer time while saving.
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todo

if (newOnlyRequiredOnSave !== mutexLogicState.onlyRequiredOnSave) {
mutexLogicState.onlyRequiredOnSave = newOnlyRequiredOnSave;

// TODO: also check for livecollab flag and editable mapping locked and so on.
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todo


function* releaseMutex() {
const annotationId = yield* select((storeState) => storeState.annotation.annotationId);
// TODOM: Mutex is auto released after a Model.ensureSavedState or so, sometimes (e.g. a proofreading action),
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yes, segment list related stuff sounds like m4.

Comment on lines +411 to +416
yield* retry(
RETRY_COUNT,
ACQUIRE_MUTEX_INTERVAL / RETRY_COUNT,
releaseAnnotationMutex,
annotationId,
);
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so, let's say the requests fail for some reason (e.g., connectivity) and then the mutex auto expires. will the backend reply with 200 to the next release request (I think this would be good because it's a noop)? if so, yes, I'd make infinite retries + backoff.

prevTracing = yield* getTracing();
},
);
// During rebasing the local users updates are replayed and thus the identity of skeleton nodes and edges diffable map entries change.
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Suggested change
// During rebasing the local users updates are replayed and thus the identity of skeleton nodes and edges diffable map entries change.
// During rebasing, the local users updates are replayed and thus the identity of skeleton nodes and edges in the diffable map entries change.

(state) =>
state.uiInformation.busyBlockingInfo.isBusy &&
state.uiInformation.busyBlockingInfo.reason === REBASING_BUSY_BLOCK_REASON,
// if (!allowUpdate) continue; TODOM: remove line
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todo

Comment on lines +159 to +160
// Ignore changes while rebasing as during this time actions are replayed to the rebased state to
// reapply the changes made by the user.
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I find "rebased state" not very clear. how about:

Suggested change
// Ignore changes while rebasing as during this time actions are replayed to the rebased state to
// reapply the changes made by the user.
// Ignore changes while rebasing as during this time actions are simply replayed on top of the server's state. Therefore, these actions were already added to the save queue and should not be added again.

if (!allowUpdate || isCurrentlyRebasing) continue;
if (!allowUpdate || isRebasing) {
if (ensureAction) {
console.error("ignoring ensure action due to currently rebasing");
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Suggested change
console.error("ignoring ensure action due to currently rebasing");
console.error("Ignoring ensure action due to current rebase operation");

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Milestone 3: Proofreading (without segment list)

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