fix: Remove unsafe type casting in useApiKey hook (#26)

[d3varaja]

Fixes #26 - Removes unsafe type casting in the useApiKey hook by implementing proper runtime validation.

[gemini-code-assist]

Summary of Changes

Hello @d3varaja, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly improves the robustness and type safety of the useApiKey hook. By introducing runtime validation for event data and refining event listener type handling, it eliminates a previously identified unsafe type casting issue. The changes ensure that the application handles local-apikey-change events more reliably, preventing potential data type mismatches and enhancing overall code stability.

Highlights

• Enhanced Type Safety: Implemented robust runtime validation for the e.detail property within the handleLocalChange event listener. This ensures that the event is a CustomEvent and its detail payload is a string before being used, preventing potential runtime errors from unsafe type casting.
• Refined Event Listener Signature: The handleLocalChange function's parameter type was broadened from CustomEvent to Event, and explicit as EventListener type assertions were removed from window.addEventListener and window.removeEventListener calls. This change aligns the function signature with the expected EventListener type after the internal runtime checks were added, making the explicit cast unnecessary.
• Issue Resolution: The FIXME comment referencing issue Unsafe Type Casting in useApiKey Hook #26, which highlighted the unsafe type casting, has been successfully addressed and removed, indicating the resolution of the identified problem.

Changelog

• legislation/ui/hooks/useApiKey.ts
  • Modified the handleLocalChange function signature to accept a generic Event type instead of CustomEvent.
  • Added a conditional check if (e instanceof CustomEvent && typeof e.detail === "string") inside handleLocalChange to safely access and validate e.detail.
  • Removed the as EventListener type assertion from window.addEventListener and window.removeEventListener calls for handleLocalChange.
  • Deleted the FIXME comment related to issue Unsafe Type Casting in useApiKey Hook #26, indicating the resolution of the unsafe type casting.

Activity

• No specific activity (comments, reviews, or progress updates) has been recorded for this pull request since its creation.

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[gemini-code-assist]

Code Review

This pull request effectively resolves an unsafe type casting issue in the useApiKey hook. By switching the event handler to use the generic Event type and adding runtime validation with instanceof, the code is now more robust and type-safe. The corresponding removal of the as EventListener type assertion is a welcome cleanup. The changes are solid, and I have one minor suggestion to improve maintainability by defining the event name as a constant.

[gemini-code-assist]

To improve maintainability and avoid 'magic strings', consider defining 'local-apikey-change' as a constant. This string is used in multiple places (here, line 31, and line 39). Using a constant makes the code easier to read and maintain, and prevents potential typos.

For example:

const LOCAL_API_KEY_CHANGE_EVENT = 'local-apikey-change';

// ... inside useEffect

window.addEventListener(LOCAL_API_KEY_CHANGE_EVENT, handleLocalChange);

[vibhatha]

@d3varaja thank you for working on this one.

We mostly vibe code ideas here to quickly prototype and learn. Pardon us with the grammar and dev style, our main objective for this repository is to experiment on ideas. And these are never production ready things :)

[vibhatha]

@ChanukaUOJ could you please help with this review.