fix: reduced useSession() calls ; layout inconsistencies

[John-Kiruba]

Description

1. MailList comp has useSession() data call and its child Thread comp does the same; the issue is Thread renders virtual items and during stale revalidation --- i assume ,(even though its memoized) it makes multiple GET /api/auth/get-session for virtual items. this is reduced my passing only the required session data as props to the threads component.

2. Layout
   

• the loader was not visible
• list items did not have gap
  fixed

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Type of Change

Please delete options that are not relevant.

• 🐛 Bug fix (non-breaking change which fixes an issue)
• 📝 Documentation update
• 🎨 UI/UX improvement
• ⚡ Performance improvement

Areas Affected

Please check all that apply:

• User Interface/Experience
• Authentication/Authorization

Testing Done

Describe the tests you've done:

• Manual testing performed
• Cross-browser testing (if UI changes)
• Mobile responsiveness verified (if UI changes)

Security Considerations

For changes involving data or authentication:

• Authentication checks are in place

Checklist

• I have read the CONTRIBUTING document
• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in complex areas
• I have updated the documentation
• My changes generate no new warnings
• All tests pass locally

Additional Notes

apart form cold start in local dev, the app (virtual rendering is lag free. Kindly comment if any issues persists from my pr, happy to look into it

Screenshots/Recordings

Add screenshots or recordings here if applicable.

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By submitting this pull request, I confirm that my contribution is made under the terms of the project's license.

Summary by CodeRabbit

• Refactor

  • Streamlined the mail thread list’s structure and rendering logic to improve performance and maintainability.
  • Optimized data handling for smoother and more efficient thread prefetching.

• Chores

  • Enhanced underlying type definitions to bolster flexibility and reliability in managing user-related data.

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[coderabbitai]

Walkthrough

The changes refactor how session data is managed and passed within the mail components. In the mail list file, the session is now memoized and provided as a prop to the Thread component instead of being accessed directly, with associated adjustments to optimize performance using hooks like useCallback. In the types file, an interface was converted to a type alias, a redundant property was removed, and a new conditional type was introduced to enforce session data requirements based on a demo flag.

Changes

File(s)	Summary
apps/mail/.../mail-list.tsx	Updated import statements; introduced memoized sessionData; modified Thread signature to accept sessionData; optimized prefetch logic with useCallback; cleaned JSX.
apps/mail/.../types/index.ts	Converted ThreadProps from an interface to a type alias; removed the demo property; added ConditionalThreadProps to handle conditional sessionData based on demo flag.

Sequence Diagram(s)

sequenceDiagram
    participant ML as MailList
    participant UM as useMemo (Session Data)
    participant T as Thread Component

    ML->>UM: Compute sessionData (userId, connectionId)
    UM-->>ML: Return memoized sessionData
    ML->>T: Pass sessionData via props
    T->>T: Use sessionData for prefetch and rendering logic

Loading

Possibly related PRs

• Feature/thread badge tooltips #410: Addresses similar modifications in the Thread component’s signature and prop handling, aligning with the changes made here.

Suggested reviewers

• MrgSub
• nizzyabi

Poem

I'm a rabbit hopping through lines of code,
With memo magic, my steps are brisk and bold.
Session data flows like streams so clear,
In Thread's new form, the logic appears.
Props refined and bugs on the run,
In code meadows, I celebrate the fun! 🐰💻
Hoppy coding adventures have just begun!

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📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between ba46ded and 4e60784.

📒 Files selected for processing (2)

• apps/mail/components/mail/mail-list.tsx (7 hunks)
• apps/mail/types/index.ts (1 hunks)

🔇 Additional comments (9)

apps/mail/types/index.ts (2)

84-89: Good type alias conversion.

Converting ThreadProps from an interface to a type alias is a sensible choice. This maintains the same structure while offering more flexibility for type composition, which you're leveraging in the new conditional type.

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91-95: Excellent type safety improvement.

The new ConditionalThreadProps type effectively enforces that sessionData is required when demo is false, while making it optional when demo is true. This conditional type pattern ensures proper type checking at compile time and clearly communicates the component's requirements.

apps/mail/components/mail/mail-list.tsx (7)

3-4: Good import organization.

Adding useMemo and replacing ThreadProps with ConditionalThreadProps aligns with the implementation changes. The imports correctly reflect the actual usage in the component.

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44-46: Performance improvement: Removed redundant useSession call.

Excellent change! Passing sessionData as a prop instead of calling useSession() directly within the Thread component eliminates redundant API calls, which addresses the performance issue mentioned in the PR objectives.

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58-72: Session data usage is correctly updated.

The prefetch logic now properly uses the passed sessionData properties instead of accessing the session object directly. The null check on sessionData?.userId ensures safety when session data might not be available.

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192-198: Good memoization of session data.

Using useMemo to extract and memoize only the needed session properties (userId and connectionId) is an excellent optimization. This ensures the derived object is only recreated when the session changes, preventing unnecessary re-renders of child components.

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217-218: Performance optimization for virtualizer.

Wrapping the estimateSize function in useCallback is a good optimization for the virtualizer. The addition of a gap property also helps with proper spacing between list items, addressing the layout inconsistency mentioned in the PR objectives.

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511-534: Improved virtualized list rendering.

The restructured mapping of virtualItems with proper positioning attributes enhances the rendering of the virtual list. The explicit styling ensures consistent layout and proper item positioning in the virtual space.

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535-543: Enhanced loader visibility.

The loading indicator is now properly centered and visible, with a clear animation that provides better user feedback during data fetching operations. The fallback empty div maintains consistent spacing when not loading.

✨ Finishing Touches

• 📝 Generate Docstrings

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[nizzyabi]

LGTM, @ahmetskilinc can you double check this

[ahmetskilinc]

@nizzyabi all good. checked locally.