8

Bugs

  • public keyword is redundant in the extension as NotificationFeed is already marked public, making its contents inherently public.

Optimizations

  • Consider caching userInfos.first { $0.userId == userId } if this operation is performed frequently, to minimize searching through the userInfos array repeatedly.
  • Consider using guard or if-let statements to handle optional values more safely and improve code readability.

Good points

  • The code makes good use of Swift's strong typing with specific types for each property.
  • Use of collections like arrays and dictionaries is appropriate and idiomatic.
  • Adopting Hashable and Sendable protocols for the MappedNotificationItem adds future-proofing, considering Swift concurrency.

Summary

The provided Swift code is clean and follows Swift's best practices in handling data mapping and optional unwrapping fairly well. The encapsulation through extensions and struct initializers is well handled. However, some redundant public access specifiers could be removed for conciseness, and a bit more optimization in handling optional values could improve readability and efficiency.

Open source alternatives

  • Rocket.Chat provides a framework for managing notifications.
  • OneSignal offers implementation options for handling notification feeds with diverse functionalities.