Minor LiveObjects fixes/refactoring

[VeskeR]

Some minor fixes/changes suggested by @coderabbitai in #1887. Opening a separate PR to not drag merging that one for longer

Summary by CodeRabbit

• New Features

  • Improved asynchronous handling in the decoding process for state messages, enhancing error management.

• Bug Fixes

  • Simplified logic for identifying extra object IDs in the LiveObjectsPool, improving readability and efficiency.

• Refactor

  • Optimized isEmpty and reset methods in the SyncLiveObjectsDataPool for better performance.
  • Removed the arrSubtract utility function to streamline codebase.

[coderabbitai]

Walkthrough

The pull request introduces several modifications across four files related to the LiveObjects functionality. Key changes include a simplification of the deleteExtraObjectIds method in the LiveObjectsPool class, which now uses the filter method instead of a utility method. The StateMessage class's decode method has been updated to handle asynchronous operations using await. Additionally, the SyncLiveObjectsDataPool class has optimized its isEmpty and reset methods for better performance by directly accessing properties and clearing the existing map. Finally, the utility function arrSubtract has been removed.

Changes

File Path	Change Summary
src/plugins/liveobjects/liveobjectspool.ts	Simplified deleteExtraObjectIds method by using filter instead of this._client.Utils.arrSubtract.
src/plugins/liveobjects/statemessage.ts	Updated decode method to handle asynchronous operations with await, maintaining existing error handling.
src/plugins/liveobjects/syncliveobjectsdatapool.ts	Optimized isEmpty method to directly access _pool.size and modified reset to clear the existing map instead of creating a new one.
src/common/lib/util/utils.ts	Removed arrSubtract function, which was used to filter elements from one array that are not in another.

Possibly related PRs

• [DTP-952, DTP-953] Add base implementation for abstract LiveObject, concrete LiveMap/LiveCounter classes #1882: This PR introduces the LiveObject class, which is foundational for the LiveObjectsPool class modified in the main PR, as it directly relates to the management of live object instances.
• [DTP-949] Initialise LiveObjects pool from state sync sequence #1890: This PR updates the LiveObjectsPool class, which is directly relevant to the changes made in the main PR regarding the LiveObjectsPool class and its methods.
• [DTP-951] Implement LiveObjects.getRoot() method #1891: This PR implements the getRoot() method in the LiveObjects class, which interacts with the LiveObjectsPool and is relevant to the overall functionality being modified in the main PR.

Suggested reviewers

• mschristensen
• owenpearson

Poem

In the pool of live objects, we play,
Filtering out the extra, come what may.
Async decoding, we hop with delight,
Resetting our maps, keeping things tight.
With each little change, our code's a delight,
A rabbit's cheer for improvements in sight! 🐇✨

---

📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Files that changed from the base of the PR and between fbf9d42 and b73a15c.

📒 Files selected for processing (1)

• src/common/lib/util/utils.ts (0 hunks)

💤 Files with no reviewable changes (1)

• src/common/lib/util/utils.ts

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[coderabbitai]

Actionable comments posted: 0

🧹 Outside diff range and nitpick comments (1)

src/plugins/liveobjects/liveobjectspool.ts (1)

30-30: Approve the simplification with a suggestion for optimization

The change simplifies the logic and improves readability by using the filter method directly. This is a good improvement for maintainability.

For potential optimization when dealing with large arrays, consider using a Set for faster lookups:

deleteExtraObjectIds(objectIds: string[]): void {
  const objectIdSet = new Set(objectIds);
  const poolObjectIds = [...this._pool.keys()];
  const extraObjectIds = poolObjectIds.filter((x) => !objectIdSet.has(x));

  extraObjectIds.forEach((x) => this._pool.delete(x));
}

This approach would change the time complexity from O(n*m) to O(n+m), which could be beneficial for very large arrays. However, for small to medium-sized arrays, the current implementation is likely sufficient.

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Files that changed from the base of the PR and between 566bf00 and fbf9d42.

📒 Files selected for processing (3)

• src/plugins/liveobjects/liveobjectspool.ts (1 hunks)
• src/plugins/liveobjects/statemessage.ts (1 hunks)
• src/plugins/liveobjects/syncliveobjectsdatapool.ts (1 hunks)

🧰 Additional context used

🔇 Additional comments (6)

src/plugins/liveobjects/syncliveobjectsdatapool.ts (3)

50-50: Improved efficiency in isEmpty method.

The change to directly access this._pool.size instead of calling a method is a good optimization. It simplifies the code and potentially improves performance by avoiding an unnecessary method call.

---

Line range hint 1-138: Overall assessment: Positive optimizations

The changes made to the SyncLiveObjectsDataPool class, specifically in the isEmpty and reset methods, are positive optimizations that improve performance without altering the class's functionality. These modifications align with TypeScript best practices for working with Map objects and should result in more efficient code execution.

---

54-54: Optimized reset method for better performance.

The change to use this._pool.clear() instead of creating a new Map is a good optimization. It's more memory-efficient and maintains existing references to the Map object.

To ensure this change doesn't have unintended consequences, please verify that no other part of the codebase relies on getting a new Map instance when reset is called. You can use the following script to check for potential issues:

src/plugins/liveobjects/statemessage.ts (3)

158-158: LGTM: Asynchronous decoding of map entries

The addition of await for decodeMapEntry ensures proper asynchronous handling of each map entry decoding operation. This change aligns well with the updated async method signature and improves the overall robustness of the decoding process.

---

164-164: LGTM: Consistent asynchronous decoding

The addition of await for decodeMapEntry in this loop maintains consistency with the previous change. This ensures that all map entries, whether in message.object or message.operation, are decoded asynchronously, improving the overall reliability of the decoding process.

---

Line range hint 151-177: Verify callers of the decode method

The decode method has been successfully updated to handle asynchronous operations for decoding map entries. This change improves the robustness of the decoding process. However, it's important to ensure that all callers of this method are updated to handle its new asynchronous nature.

Please run the following script to identify potential callers that might need updating:

✅ Verification successful

Verification Successful

All callers of the decode method are correctly handling its asynchronous behavior.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Find potential callers of StateMessage.decode that might need updating

# Search for StateMessage.decode calls
echo "Potential callers of StateMessage.decode:"
rg "StateMessage\.decode\(" --type ts

# Search for potential async function calls that might not be awaited
echo "\nPotential async calls that might need to be awaited:"
rg "await.*StateMessage\.decode\(" --type ts

Length of output: 592