fix: reproducible oids for unlockAllSkins #769

Sainan · 2025-01-11T17:40:12-08:00

Sainan commented

2025-01-11 17:40:12 -08:00

No description provided.

coderabbitai[bot] commented

2025-01-11 17:40:19 -08:00

(Migrated from github.com)

Walkthrough

The pull request introduces a modification to the inventoryController.ts file, specifically focusing on the method of generating item identifiers. A new hashing function called catBreadHash has been implemented, which uses the FNV-1a hashing algorithm to compute a unique numeric hash for a given string input. This function is designed to generate consistent and unique identifiers, particularly for weapon skin items. The change alters the approach to creating ItemId values, replacing a simple incrementing integer method with a hash-based generation technique that uses the item's unique name as the input. The modification aims to improve identifier generation while maintaining the existing code structure and error handling mechanisms.

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## Walkthrough The pull request introduces a modification to the `inventoryController.ts` file, specifically focusing on the method of generating item identifiers. A new hashing function called `catBreadHash` has been implemented, which uses the FNV-1a hashing algorithm to compute a unique numeric hash for a given string input. This function is designed to generate consistent and unique identifiers, particularly for weapon skin items. The change alters the approach to creating `ItemId` values, replacing a simple incrementing integer method with a hash-based generation technique that uses the item's unique name as the input. The modification aims to improve identifier generation while maintaining the existing code structure and error handling mechanisms.      ## Finishing Touches - [ ]  📝 Generate Docstrings (Beta)   --- Thank you for using CodeRabbit. We offer it for free to the OSS community and would appreciate your support in helping us grow. If you find it useful, would you consider giving us a shout-out on your favorite social media? <details> <summary>❤️ Share</summary> - [X](https://twitter.com/intent/tweet?text=I%20just%20used%20%40coderabbitai%20for%20my%20code%20review%2C%20and%20it%27s%20fantastic%21%20It%27s%20free%20for%20OSS%20and%20offers%20a%20free%20trial%20for%20the%20proprietary%20code.%20Check%20it%20out%3A&url=https%3A//coderabbit.ai) - [Mastodon](https://mastodon.social/share?text=I%20just%20used%20%40coderabbitai%20for%20my%20code%20review%2C%20and%20it%27s%20fantastic%21%20It%27s%20free%20for%20OSS%20and%20offers%20a%20free%20trial%20for%20the%20proprietary%20code.%20Check%20it%20out%3A%20https%3A%2F%2Fcoderabbit.ai) - [Reddit](https://www.reddit.com/submit?title=Great%20tool%20for%20code%20review%20-%20CodeRabbit&text=I%20just%20used%20CodeRabbit%20for%20my%20code%20review%2C%20and%20it%27s%20fantastic%21%20It%27s%20free%20for%20OSS%20and%20offers%20a%20free%20trial%20for%20proprietary%20code.%20Check%20it%20out%3A%20https%3A//coderabbit.ai) - [LinkedIn](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fcoderabbit.ai&mini=true&title=Great%20tool%20for%20code%20review%20-%20CodeRabbit&summary=I%20just%20used%20CodeRabbit%20for%20my%20code%20review%2C%20and%20it%27s%20fantastic%21%20It%27s%20free%20for%20OSS%20and%20offers%20a%20free%20trial%20for%20proprietary%20code) </details> <details> <summary>🪧 Tips</summary> ### Chat There are 3 ways to chat with [CodeRabbit](https://coderabbit.ai): - Review comments: Directly reply to a review comment made by CodeRabbit. Example: - `I pushed a fix in commit <commit_id>, please review it.` - `Generate unit testing code for this file.` - `Open a follow-up GitHub issue for this discussion.` - Files and specific lines of code (under the "Files changed" tab): Tag `@coderabbitai` in a new review comment at the desired location with your query. Examples: - `@coderabbitai generate unit testing code for this file.` - `@coderabbitai modularize this function.` - PR comments: Tag `@coderabbitai` in a new PR comment to ask questions about the PR branch. For the best results, please provide a very specific query, as very limited context is provided in this mode. Examples: - `@coderabbitai gather interesting stats about this repository and render them as a table. 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coderabbitai[bot] (Migrated from github.com) reviewed 2025-01-11 17:42:04 -08:00

coderabbitai[bot] (Migrated from github.com) left a comment

Actionable comments posted: 0

🧹 Nitpick comments (2)

src/controllers/api/inventoryController.ts (2)
164-164: Document the magic number prefix

The implementation correctly ensures reproducible ObjectIds by using a deterministic hash. However, the prefix "ca70ca70ca70ca70" should be documented to explain its significance or extracted into a named constant.
+ // Prefix ensures the generated ObjectId is unique across different item types
+ const WEAPON_SKIN_OID_PREFIX = "ca70ca70ca70ca70";
  {
-   $oid: "ca70ca70ca70ca70" + catBreadHash(uniqueName).toString(16).padStart(8, "0")
+   $oid: WEAPON_SKIN_OID_PREFIX + catBreadHash(uniqueName).toString(16).padStart(8, "0")
  }
253-261: Add more detailed documentation for the hash function

The FNV-1a implementation is correct and properly handles JavaScript's signed integer limitations. Consider adding more detailed documentation about the algorithm's properties and why it was chosen.
- // This is FNV1a-32 except operating under modulus 2^31 because JavaScript is stinky and likes producing negative integers out of nowhere.
+ /**
+  * Implements FNV-1a 32-bit hash algorithm with modifications for JavaScript.
+  * - Uses modulus 2^31 to ensure positive integers in JavaScript
+  * - Maintains good distribution properties of FNV-1a
+  * - Generates deterministic hashes for consistent ObjectIds
+  * @param name The string to hash
+  * @returns A positive 32-bit integer hash
+  */

📜 Review details

Configuration used: .coderabbit.yaml
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 53d5e7c3f0 and 4b535a26db.

📒 Files selected for processing (1)

src/controllers/api/inventoryController.ts (2 hunks)

🔇 Additional comments (1)

src/controllers/api/inventoryController.ts (1)

164-164: Verify ObjectId uniqueness and compatibility

The implementation looks correct, but let's verify:

No potential hash collisions between different weapon skins

Compatibility with MongoDB's ObjectId format

✅ Verification successful

Implementation is correct and safe

The ObjectId generation follows MongoDB's format requirements and maintains uniqueness through:

Fixed prefix for weapon skin namespace isolation

Unique hash-based suffix derived from weapon names

Consistent 24-character hexadecimal format
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:
#!/bin/bash
# Description: Check for potential hash collisions and ObjectId format issues

# Test 1: Check for hash collisions in weapon skins
echo "Checking for potential hash collisions..."
rg -l "ExportCustoms" | xargs cat | grep -o '"uniqueName": "[^"]*"' | sort | uniq | while read -r line; do
  uniqueName=$(echo "$line" | cut -d'"' -f4)
  echo "Testing uniqueName: $uniqueName"
done

# Test 2: Verify ObjectId format compatibility
echo "Verifying ObjectId format..."
rg -A 1 '\$oid:' | grep -v '^--' | grep -v "ca70ca70ca70ca70" | sort | uniq
Length of output: 2866

**Actionable comments posted: 0** <details> <summary>🧹 Nitpick comments (2)</summary><blockquote> <details> <summary>src/controllers/api/inventoryController.ts (2)</summary><blockquote> `164-164`: **Document the magic number prefix** The implementation correctly ensures reproducible ObjectIds by using a deterministic hash. However, the prefix "ca70ca70ca70ca70" should be documented to explain its significance or extracted into a named constant. ```diff + // Prefix ensures the generated ObjectId is unique across different item types + const WEAPON_SKIN_OID_PREFIX = "ca70ca70ca70ca70"; { - $oid: "ca70ca70ca70ca70" + catBreadHash(uniqueName).toString(16).padStart(8, "0") + $oid: WEAPON_SKIN_OID_PREFIX + catBreadHash(uniqueName).toString(16).padStart(8, "0") } ``` --- `253-261`: **Add more detailed documentation for the hash function** The FNV-1a implementation is correct and properly handles JavaScript's signed integer limitations. Consider adding more detailed documentation about the algorithm's properties and why it was chosen. ```diff - // This is FNV1a-32 except operating under modulus 2^31 because JavaScript is stinky and likes producing negative integers out of nowhere. + /** + * Implements FNV-1a 32-bit hash algorithm with modifications for JavaScript. + * - Uses modulus 2^31 to ensure positive integers in JavaScript + * - Maintains good distribution properties of FNV-1a + * - Generates deterministic hashes for consistent ObjectIds + * @param name The string to hash + * @returns A positive 32-bit integer hash + */ ``` </blockquote></details> </blockquote></details> <details> <summary>📜 Review details</summary> **Configuration used: .coderabbit.yaml** **Review profile: CHILL** **Plan: Pro** <details> <summary>📥 Commits</summary> Reviewing files that changed from the base of the PR and between 53d5e7c3f0ea0c1228ea95f1bbe47306bc05bf41 and 4b535a26dbdbc861fb000dff0f0bce3756d3a789. </details> <details> <summary>📒 Files selected for processing (1)</summary> * `src/controllers/api/inventoryController.ts` (2 hunks) </details> <details> <summary>🔇 Additional comments (1)</summary><blockquote> <details> <summary>src/controllers/api/inventoryController.ts (1)</summary> `164-164`: **Verify ObjectId uniqueness and compatibility** The implementation looks correct, but let's verify: 1. No potential hash collisions between different weapon skins 2. Compatibility with MongoDB's ObjectId format <details> <summary>✅ Verification successful</summary>  **Implementation is correct and safe** The ObjectId generation follows MongoDB's format requirements and maintains uniqueness through: - Fixed prefix for weapon skin namespace isolation - Unique hash-based suffix derived from weapon names - Consistent 24-character hexadecimal format </details> <details> <summary>🏁 Scripts executed</summary> The following scripts were executed for the analysis: Script: ```shell #!/bin/bash # Description: Check for potential hash collisions and ObjectId format issues # Test 1: Check for hash collisions in weapon skins echo "Checking for potential hash collisions..." rg -l "ExportCustoms" | xargs cat | grep -o '"uniqueName": "[^"]*"' | sort | uniq | while read -r line; do uniqueName=$(echo "$line" | cut -d'"' -f4) echo "Testing uniqueName: $uniqueName" done # Test 2: Verify ObjectId format compatibility echo "Verifying ObjectId format..." rg -A 1 '\$oid:' | grep -v '^--' | grep -v "ca70ca70ca70ca70" | sort | uniq ``` Length of output: 2866 </details> </details> </blockquote></details> </details>

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Reference: OpenWF/SpaceNinjaServer#769