Apply GCPair to TreeNode, TextNode #174
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WalkthroughThe recent updates focus on enhancing the CRDT (Conflict-free Replicated Data Type) implementation by refining garbage collection (GC) mechanisms, renaming elements for clarity, and improving type consistency across various components. Key changes include renaming Changes
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Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #174 +/- ##
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- Coverage 43.01% 42.91% -0.11%
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Files 106 106
Lines 19252 19272 +20
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- Hits 8282 8270 -12
- Misses 10970 11002 +32 ☔ View full report in Codecov by Sentry. |
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Actionable comments posted: 2
Outside diff range and nitpick comments (4)
Sources/Document/CRDT/RGATreeSplit.swift (1)
Line range hint
441-484: Enhancements to theeditmethod to support garbage collection.The
editmethod has been significantly extended to handle garbage collection. However, the method is quite long and handles multiple responsibilities. Consider refactoring it to improve modularity and maintainability:@discardableResult public func edit(_ range: RGATreeSplitPosRange, _ editedAt: TimeTicket, _ value: T?, _ maxCreatedAtMapByActor: [String: TimeTicket]? = nil) throws -> (RGATreeSplitPos, [String: TimeTicket], [GCPair], [ContentChange<T>]) { let splitResults = try splitNodes(range, editedAt) let deletionResults = try deleteNodes(splitResults.nodesToDelete, editedAt, maxCreatedAtMapByActor) let insertionResults = insertNode(splitResults.fromLeft, value) let gcPairs = generateGCPairs(deletionResults.removedNodes) return (insertionResults.caretPos, deletionResults.maxCreatedAtMap, gcPairs, insertionResults.changes) }This refactor breaks down the
editmethod into smaller, more focused methods likesplitNodes,deleteNodes,insertNode, andgenerateGCPairs, each handling a specific part of the editing process.Sources/Document/CRDT/CRDTTree.swift (3)
511-523: Add documentation forgetGCPairsmethod.The
getGCPairsmethod lacks detailed documentation. It would be beneficial to explain what constitutes a "GC pair" and under what conditions a pair is added to the list. This will help future maintainers understand the logic and intent behind this method.
536-543: Clarify the purpose oftoIDStringin the context of garbage collection.The
toIDStringmethod in theGCChildextension returns a string representation of the node's ID. It would be helpful to document how this ID string is utilized, particularly in the context of garbage collection processes, to ensure clarity for future developers.
Line range hint
725-871: Review the complexeditmethod for potential refactoring.The
editmethod is quite lengthy and handles multiple responsibilities, including node deletion, merging, and insertion. Consider refactoring this method into smaller, more manageable functions. This can improve readability and maintainability. For instance, the deletion logic could be extracted into a separate method, as could the logic for node merging and insertion.- func edit(_ range: TreePosRange, _ contents: [CRDTTreeNode]?, _ splitLevel: Int32, _ editedAt: TimeTicket, _ maxCreatedAtMapByActor: [String: TimeTicket] = [:], _ issueTimeTicket: () -> TimeTicket) throws -> ([TreeChange], [GCPair], [String: TimeTicket]) { + func edit(_ range: TreePosRange, _ contents: [CRDTTreeNode]?, _ splitLevel: Int32, _ editedAt: TimeTicket, _ maxCreatedAtMapByActor: [String: TimeTimeTicket] = [:], _ issueTimeTicket: () -> TimeTicket) throws -> ([TreeChange], [GCPair], [String: TimeTicket]) { + // Refactored code here... + }
Review Details
Configuration used: CodeRabbit UI
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Files selected for processing (16)
- Sources/API/Converter.swift (3 hunks)
- Sources/Document/CRDT/CRDTElement.swift (1 hunks)
- Sources/Document/CRDT/CRDTRoot.swift (7 hunks)
- Sources/Document/CRDT/CRDTText.swift (10 hunks)
- Sources/Document/CRDT/CRDTTree.swift (9 hunks)
- Sources/Document/CRDT/GC.swift (1 hunks)
- Sources/Document/CRDT/RGATreeSplit.swift (8 hunks)
- Sources/Document/CRDT/RHT.swift (1 hunks)
- Sources/Document/Change/ChangeContext.swift (1 hunks)
- Sources/Document/Document.swift (2 hunks)
- Sources/Document/Json/JSONText.swift (3 hunks)
- Sources/Document/Json/JSONTree.swift (2 hunks)
- Sources/Document/Operation/EditOperation.swift (1 hunks)
- Sources/Document/Operation/TreeEditOperation.swift (2 hunks)
- Tests/Unit/Document/CRDT/CRDTRootTests.swift (1 hunks)
- Tests/Unit/Document/GCTests.swift (3 hunks)
Files skipped from review due to trivial changes (3)
- Sources/Document/CRDT/CRDTElement.swift
- Sources/Document/CRDT/RHT.swift
- Tests/Unit/Document/CRDT/CRDTRootTests.swift
Additional comments not posted (22)
Sources/Document/CRDT/GC.swift (1)
43-45: The addition ofCRDTGCPairContainableprotocol aligns well with the PR's objectives to enhance garbage collection mechanisms.Sources/Document/Operation/EditOperation.swift (1)
76-79: The changes to handleGCPairregistration after an edit operation are correctly implemented and align with the PR's objectives.Verification successful
The
registerGCPairfunction is correctly implemented in bothChangeContext.swiftandCRDTRoot.swift. The function inChangeContext.swiftdelegates the registration to the root, while the function inCRDTRoot.swifthandles the registration logic, including checking and updating thegcPairMap.The changes in
EditOperation.swiftto handleGCPairregistration after an edit operation are consistent with the overall garbage collection system.
ChangeContext.swiftimplementation:func registerGCPair(_ pair: GCPair) { self.root.registerGCPair(pair) }
CRDTRoot.swiftimplementation:func registerGCPair(_ pair: GCPair) { guard let childID = pair.child?.toIDString else { return } if self.gcPairMap[childID] != nil { self.gcPairMap.removeValue(forKey: childID) return } self.gcPairMap[childID] = pair }The integration of
GCPairhandling with the garbage collection system is properly implemented.Scripts Executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the integration of GCPair handling with the garbage collection system. # Test: Search for the usage of `registerGCPair`. Expect: Proper handling in all occurrences. rg --type swift $'registerGCPair'Length of output: 1342
Script:
#!/bin/bash # Description: Verify the implementation of `registerGCPair` in `ChangeContext.swift` and `CRDTRoot.swift`. # Extract the implementation of `registerGCPair` in `ChangeContext.swift` ast-grep --lang swift --pattern $'func registerGCPair($_) { $$$ }' --json # Extract the implementation of `registerGCPair` in `CRDTRoot.swift` ast-grep --lang swift --pattern $'func registerGCPair($_) { $$$ }' --jsonLength of output: 2993
Sources/Document/Operation/TreeEditOperation.swift (1)
Line range hint
74-87: The changes to handleGCPairregistration after a tree edit operation are correctly implemented and align with the PR's objectives.Verification successful
The
registerGCPairfunction is implemented correctly in bothCRDTRootandChangeContext. The function inCRDTRootensures that theGCPairis properly managed within thegcPairMap, and the function inChangeContextdelegates the registration toCRDTRoot.
CRDTRoot.swift:
- The function checks if the
childIDexists ingcPairMap.- If it exists, it removes the entry; otherwise, it adds the
GCPairto the map.
ChangeContext.swift:
- The function simply calls
registerGCPaironself.root, ensuring the pair is registered in the root context.These implementations confirm that the
GCPairhandling is integrated correctly with the garbage collection system.Scripts Executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the integration of GCPair handling with the garbage collection system in tree operations. # Test: Search for the usage of `registerGCPair`. Expect: Proper handling in all occurrences. rg --type swift $'registerGCPair'Length of output: 1342
Script:
#!/bin/bash # Extract the implementation of `registerGCPair` in `CRDTRoot.swift` ast-grep --lang swift --pattern $'func registerGCPair(_ pair: GCPair) { $$$ }' Sources/Document/CRDT/CRDTRoot.swift # Extract the implementation of `registerGCPair` in `ChangeContext.swift` ast-grep --lang swift --pattern $'func registerGCPair(_ pair: GCPair) { $$$ }' Sources/Document/Change/ChangeContext.swiftLength of output: 1269
Sources/Document/Json/JSONText.swift (1)
89-97: The changes to handleGCPairregistration after an edit operation inJSONTextare correctly implemented and align with the PR's objectives.Sources/Document/CRDT/CRDTRoot.swift (1)
Line range hint
38-64: The updates toCRDTRootfor handling garbage collection elements andGCPairregistration are correctly implemented and align with the PR's objectives.Also applies to: 123-130, 157-176, 210-226
Verification successful
The script output indicates that
gcElementSetByCreatedAtandregisterGCPairare used in multiple files, includingCRDTRoot.swift,ChangeContext.swift, and various JSON and Operation files. This suggests a widespread integration of these elements.To ensure proper integration, we need to verify the context in which these elements are used. Specifically, we should check if they are being used correctly for garbage collection purposes.
Let's proceed by examining the context of these occurrences in the relevant files.
The context provided by the script output shows that
gcElementSetByCreatedAtandregisterGCPairare used consistently across various files, includingCRDTRoot.swift,ChangeContext.swift, and several JSON and Operation files. The usage aligns with the intended garbage collection mechanism, ensuring that elements are properly registered and managed for garbage collection.The integration appears to be thorough and correctly implemented, with
registerGCPairbeing called in appropriate contexts to register garbage collection pairs, andgcElementSetByCreatedAtbeing used to track elements for garbage collection.Based on this detailed context, the changes to
CRDTRoot.swiftand related files are verified to be correctly implemented and consistent with the PR's objectives.Scripts Executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the integration of garbage collection handling in `CRDTRoot`. # Test: Search for the usage of `gcElementSetByCreatedAt` and `registerGCPair`. Expect: Proper handling in all occurrences. rg --type swift $'gcElementSetByCreatedAt|registerGCPair'Length of output: 1980
Script:
#!/bin/bash # Description: Verify the context of `gcElementSetByCreatedAt` and `registerGCPair` usage. # Extract lines around the occurrences of `gcElementSetByCreatedAt` and `registerGCPair` for context. rg --type swift --context 5 'gcElementSetByCreatedAt|registerGCPair'Length of output: 13982
Sources/Document/CRDT/CRDTText.swift (8)
47-50: RenamingTextValuetoCRDTTextValuealigns with the broader refactoring across the project.
78-79: Thesubstringmethod correctly returns a new instance ofCRDTTextValue, ensuring immutability.
143-151: ThegetGCPairsmethod efficiently collects garbage collection pairs, which is crucial for managing memory in CRDT structures.
154-154: The extension ofCRDTTextValueto conform toGCParentis well-implemented, allowing for effective garbage collection.
176-176: The constructor andeditmethod inCRDTTexthave been updated to handleCRDTTextValue. The return type of theeditmethod now includes garbage collection pairs, which is a significant enhancement for memory management.Also applies to: 190-190, 214-214
225-225: ThesetStylemethod's implementation is robust, ensuring that only nodes that can be styled are processed. This method now also returns garbage collection pairs, enhancing the garbage management.Also applies to: 241-241
358-358: Thevaluesproperty getter has been correctly updated to filter out removed nodes, which is essential for accurate data representation.
379-396: The extension ofCRDTTextto conform toCRDTGCPairContainableis correctly implemented, ensuring that all removable nodes and their attributes are considered for garbage collection.Sources/Document/Json/JSONTree.swift (1)
481-487: Theeditmethod inJSONTreehas been enhanced to handle garbage collection pairs, which is crucial for maintaining the integrity and performance of the CRDT structure.Tests/Unit/Document/GCTests.swift (2)
179-211: The test implementation for checking garbage collection with already removed text nodes is correct and well-structured.
368-418: The test implementation for checking garbage collection with already removed tree nodes is correct and well-structured.Sources/Document/Document.swift (1)
Line range hint
436-510: The implementation of theapplyChangesfunction correctly handles the application of changes and updates the garbage collection metrics appropriately.Sources/Document/CRDT/RGATreeSplit.swift (2)
403-407: Implementation ofGCChildprotocol inRGATreeSplitNode.The extension of
RGATreeSplitNodeto conform toGCChildwith thetoIDStringproperty is well-implemented. It leverages the existingtoIDStringmethod ofRGATreeSplitNodeID, ensuring consistency with ID string generation across the application.
844-850: Implementation ofpurgemethod inGCParentprotocol.The
purgemethod correctly handles the disconnection of a node from its neighbors in the linked list structure, ensuring that all references are properly cleared to avoid memory leaks. This is crucial for the correct management of garbage collection.Sources/API/Converter.swift (3)
1015-1015: Updated type intoTextNodesfunction toCRDTTextValuemaintains consistency with the new class definition.Verification successful
The renaming of
TextValuetoCRDTTextValuehas been consistently applied across the codebase. No remaining instances ofTextValuewere found.Scripts Executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that the renaming of `TextValue` to `CRDTTextValue` is consistently applied across the codebase. # Test: Search for any remaining instances of `TextValue`. Expect: No occurrences. rg --type swift "TextValue"Length of output: 1581
1039-1040: Updated type infromTextNodefunction toCRDTTextValueensures consistency with the new class definition.Verification successful
The renaming of
TextValuetoCRDTTextValuehas been consistently applied across the codebase. No remaining instances ofTextValuewere found.Scripts Executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that the renaming of `TextValue` to `CRDTTextValue` is consistently applied across the codebase. # Test: Search for any remaining instances of `TextValue`. Expect: No occurrences. rg --type swift "TextValue"Length of output: 1581
701-701: RenamingTextValuetoCRDTTextValuealigns with the broader refactoring goals.Verification successful
The renaming of
TextValuetoCRDTTextValuehas been consistently applied across the codebase.
- Sources/Document/Json/JSONText.swift
- Sources/Document/CRDT/CRDTText.swift
- Sources/API/Converter.swift
Scripts Executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that the renaming of `TextValue` to `CRDTTextValue` is consistently applied across the codebase. # Test: Search for any remaining instances of `TextValue`. Expect: No occurrences. rg --type swift "TextValue"Length of output: 1581
| let justRemoved = self.removedAt == nil | ||
| if !self.createdAt.after(maxCreatedAt) && (self.removedAt == nil || editedAt.after(self.removedAt!)) { | ||
| return justRemoved | ||
| } | ||
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Consider simplifying the canDelete method's logic.
The current implementation of canDelete uses a temporary variable justRemoved and a somewhat complex conditional structure. This can be simplified for better readability and efficiency:
func canDelete(_ editedAt: TimeTicket, _ maxCreatedAt: TimeTicket) -> Bool {
return self.removedAt == nil && !self.createdAt.after(maxCreatedAt) && (self.removedAt == nil || editedAt.after(self.removedAt!))
}This version directly returns the result of the logical condition, making the code cleaner and easier to understand.
| extension CRDTTree: CRDTGCPairContainable { | ||
| /** | ||
| * `getGCPairs` returns the pairs of GC. | ||
| */ | ||
| func getGCPairs() -> [GCPair] { | ||
| var pairs = [GCPair]() | ||
| self.indexTree.traverse { node, _ in | ||
| if node.removedAt != nil { | ||
| pairs.append(GCPair(parent: self, child: node)) | ||
| } | ||
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| for pair in node.getGCPairs() { | ||
| pairs.append(pair) | ||
| } | ||
| } | ||
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| return pairs | ||
| } |
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Tip
Codebase Verification
The search results indicate that there are numerous tests related to CRDTTree and garbage collection, but none specifically named test_getGCPairs. This suggests that while there may be indirect tests covering the functionality of getGCPairs, there are no direct unit tests for this method.
To ensure the traversal logic in getGCPairs is thoroughly validated, it would be prudent to add specific unit tests for this method. This will help verify that the method correctly identifies all nodes that should be collected.
- Consider adding unit tests for
getGCPairsto ensure the traversal logic is accurate and no nodes are missed.
Analysis chain
Validate the traversal logic in getGCPairs.
The getGCPairs method in the CRDTTree class performs a traversal to collect garbage collection pairs. It's crucial to ensure that this traversal correctly identifies all nodes that should be collected. Consider adding unit tests to verify that the traversal logic is accurate and that no nodes are missed.
Scripts Executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Verify the traversal logic in `getGCPairs`.
# Test: Search for unit tests related to `getGCPairs`. Expect: Tests that cover various tree configurations.
rg --type swift 'func test_getGCPairs'
Length of output: 40
Script:
#!/bin/bash
# Description: Verify the traversal logic in `getGCPairs` by searching for tests related to `CRDTTree`.
# Test: Search for unit tests related to `CRDTTree`. Expect: Tests that cover various tree configurations.
rg --type swift 'CRDTTree' --files-with-matches | xargs rg --type swift 'func test'
Length of output: 15388
What this PR does / why we need it:
Which issue(s) this PR fixes:
Fixes #
Special notes for your reviewer:
Does this PR introduce a user-facing change?:
Additional documentation:
Checklist:
Summary by CodeRabbit
New Features
Refactor
TextValuetoCRDTTextValue.removedElementSetByCreatedAttogcElementSetByCreatedAt.CRDTGCElementprotocol and associated methods.Bug Fixes
Tests