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fix: change historical to false for events #329

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edisontim
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@edisontim edisontim commented Nov 11, 2024

Summary by CodeRabbit

  • New Features
    • Updated handling of historical event data, now defaulting to non-historical for better performance.
    • Improved data fetching logic to terminate when no entities are returned, enhancing efficiency.

These changes streamline event synchronization and retrieval processes for a smoother user experience.

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coderabbitai bot commented Nov 11, 2024

Walkthrough

The pull request modifies the getSyncEvents, getEvents, and syncEvents functions in packages/state/src/recs/index.ts. The default value of the historical parameter is changed from true to false, affecting how historical event data is processed. Additionally, the control flow in the getEvents function is updated to stop fetching when no entities are returned, rather than when fewer entities than requested are available. This adjustment also reflects in the syncEvents function's parameter signature.

Changes

File Path Change Summary
packages/state/src/recs/index.ts - Updated getSyncEvents, getEvents, and syncEvents functions to change the default value of historical from true to false.
- Modified getEvents control flow to terminate fetching when no entities are returned instead of when fewer than the specified limit are available.
- Adjusted parameter signature of syncEvents to reflect the change in the historical default value.

Possibly related PRs

  • feat: allow passing historical as a parameter #313: The changes in this PR directly relate to the same functions (getSyncEvents, getEvents, and syncEvents) in packages/state/src/recs/index.ts, where the historical parameter is introduced, while the main PR modifies its default value from true to false.

Poem

In the code where events play,
A little change brightens the day.
Historical now false, oh what a sight,
Fetching data feels just right!
With fewer stops, we hop along,
In the world of code, we sing our song! 🐇✨


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Actionable comments posted: 0

🧹 Outside diff range and nitpick comments (1)
packages/state/src/recs/index.ts (1)

Based on the search results and documentation comments, I can now generate the final response.

Confirmed: The original review comment correctly identified a critical issue

The change from length < limit to length === 0 is problematic because:

  1. The documentation explicitly states that the function "fetches entities in batches, controlled by the 'limit' parameter"
  2. The original logic using length < limit is the correct implementation for batch-based pagination, as it properly detects when we've received fewer items than requested
  3. The new condition length === 0 breaks the batch processing contract and can lead to infinite loops when the total number of entities is exactly divisible by the limit

The original review's recommendation to either:

  • Revert to length < limit (Option 1)
  • Use both conditions length === 0 || length < limit (Option 2)

is correct and should be followed to maintain proper pagination behavior.

🔗 Analysis chain

Line range hint 190-194: Critical: Potential infinite loop in pagination logic

The new condition Object.keys(entities).length === 0 could lead to an infinite loop if:

  1. The total number of entities is exactly divisible by the limit
  2. The server consistently returns limit number of entities but has no more data

Consider one of these safer approaches:

-        if (Object.keys(entities).length === 0) {
+        // Option 1: Keep original logic (safer)
+        if (Object.keys(entities).length < limit) {
+            continueFetching = false;
+        } else {
+            offset += limit;
+        }

+        // Option 2: Add both conditions
+        if (Object.keys(entities).length === 0 || Object.keys(entities).length < limit) {
             continueFetching = false;
         } else {
             offset += limit;
         }

Let me gather more context about the pagination logic by examining the implementation.


The search results show both the old and new implementations of the pagination logic in the same file. Let me examine the full context of this function to understand its purpose and interaction with the server.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Search for similar pagination patterns in the codebase
echo "Searching for pagination patterns..."
rg "continueFetching.*length.*limit" --type ts -A 5 -B 5

Length of output: 1853


Script:

#!/bin/bash
# Search for the getEvents function implementation
ast-grep --pattern 'export async function getEvents($_) {
  $$$
}'

# Also search for any similar pagination patterns
rg "offset.*limit" --type ts -A 5 -B 5

Length of output: 1262


Script:

#!/bin/bash
# Get the full context of the file around getEvents function
rg -B 20 -A 20 "async function getEvents" packages/state/src/recs/index.ts

# Also check if there are any comments or documentation about pagination
rg "pagination|fetch.*limit" --type ts packages/state/src/recs/index.ts

Length of output: 371

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Reviewing files that changed from the base of the PR and between 75be133 and d4437d2.

📒 Files selected for processing (1)
  • packages/state/src/recs/index.ts (5 hunks)
🔇 Additional comments (2)
packages/state/src/recs/index.ts (2)

66-66: LGTM: Documentation updates are accurate and consistent

The JSDoc updates correctly reflect the new default value of historical: false across all affected functions.

Also applies to: 161-161, 304-304


169-169: Verify impact of breaking change

Changing the default value of historical from true to false is a breaking change that could affect existing consumers who rely on the default behavior. Consider:

  1. Adding a migration guide
  2. Verifying all call sites
#!/bin/bash
# Search for direct calls to affected functions to assess impact
echo "Searching for getEvents calls..."
rg "getEvents\(" --type ts

echo "Searching for syncEvents calls..."
rg "syncEvents\(" --type ts

# Search for indirect calls through getSyncEvents
echo "Searching for getSyncEvents calls..."
rg "getSyncEvents\(" --type ts

Also applies to: 316-316

@ponderingdemocritus ponderingdemocritus merged commit b47c945 into dojoengine:main Nov 12, 2024
3 checks passed
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2 participants