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8
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### Bugs
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- There are no apparent bugs in the provided code snippet.
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### Optimizations
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- Ensure that the `User.Avatar` type and `User.Avatar.CodingData` type perform necessary validation or have proper error handling, especially if they are retrieved from or decoded from external sources. This is not visible in the current snippet but is something to watch out for.
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- Consider marking `UsernameMapEntryCodingData` properties as `private` if they do not need to be accessed directly from outside this structure, to enhance encapsulation.
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- Assess if additional convenience initializers or factory methods could be beneficial for `UserInfo`, especially if it needs to be constructed from various other data representations.
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### Good points
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- The use of structures ensures value semantics which can help prevent unintended sharing of state.
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- The adoption of `Hashable` allows instances of `UserInfo` to be used in collections that require hashing, like sets or as dictionary keys.
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- The separation of concerns by creating code structures specifically for data coding/decoding is a positive approach.
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### Summary
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The code is well-structured, leveraging Swift's protocols like `Hashable` and `Sendable` to ensure that `UserInfo` instances can participate in hashable collections, and are safe for concurrent usage respectively. The `Decodable` implementation is good practice for handling potential external data input in a structured manner. There is consideration for encapsulation but ensuring the unnecessary exposure of properties remains crucial for maintaining clean architecture.
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### Open source alternatives
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- **Stream**: A popular open-source library for building scalable newsfeeds and activity streams, which might overlap with custom solutions involving user notifications or feeds. Stream allows for robust feed management and personalization.
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- **Rocket.Chat**: Though more comprehensive as a communication solution, it has features around notifications and feed management in its open-source implementation. |