fix:(masterbots.ai) add useScroll hook

[Bran18]

Summary by Sourcery

Fix the scrolling behavior in the thread component by introducing a two-phase scroll mechanism and detecting when the thread is near the bottom. This ensures smooth scrolling to the bottom when new messages are added, enhancing the user experience.

Bug Fixes:

• Implement a two-phase scroll mechanism to ensure smooth scrolling to the bottom of the thread when new messages are added.

Enhancements:

• Add functionality to detect if the thread is near the bottom using an IntersectionObserver, improving the user experience by automatically scrolling to the bottom when new messages arrive.

Summary by CodeRabbit

• New Features

  • Enhanced scrolling behavior in the ChatList and Thread components for improved user experience.
  • Automatic scrolling to the latest messages when new content arrives.
  • Improved loading mechanism for additional messages in the Thread component.
  • Introduction of a new useScroll hook for smoother scrolling interactions.

• Bug Fixes

  • Resolved issues with message visibility and scrolling jumps in chat interactions.

These updates enhance usability and responsiveness, making chat and thread interactions smoother and more intuitive for users.

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Name	Status	Preview	Comments	Updated (UTC)
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[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request implements a two-phase scroll mechanism and improves the scrolling behavior in the thread component. It also adds functionality to detect when the thread is near the bottom and scroll accordingly when new messages are added.

File-Level Changes

Change	Details	Files
Implement two-phase scroll mechanism	Add scrollToBottom function using requestAnimationFrame for smooth scrolling Implement smoothScrollToBottom function in ChatList component Update scrolling logic to use the new two-phase scroll mechanism	apps/masterbots.ai/components/routes/thread/thread-component.tsx apps/masterbots.ai/components/routes/chat/chat-list.tsx
Add near-bottom detection for thread	Implement isNearBottom state and detection logic using IntersectionObserver Add useEffect hook to handle scrolling when new responses are received and thread is near bottom Pass isNearBottom prop to ChatList component	apps/masterbots.ai/components/routes/thread/thread-component.tsx
Refactor thread content rendering	Add contentRef to manage scrollable content area Wrap ChatList component with a scrollable div Update ChatList component to accept containerRef and isNearBottom props	apps/masterbots.ai/components/routes/thread/thread-component.tsx apps/masterbots.ai/components/routes/chat/chat-list.tsx
Optimize message pair updates in ChatList	Implement JSON.stringify comparison to avoid unnecessary updates Use useCallback for memoizing smoothScrollToBottom function	apps/masterbots.ai/components/routes/chat/chat-list.tsx

---

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[coderabbitai]

Walkthrough

The changes introduce enhancements to the ChatList and ThreadComponent components, focusing on improving scrolling behavior and message handling. New props such as containerRef and isNearBottom have been added to ChatList, while ThreadComponent now includes contentRef, isNearBottom, and various scrolling functions. Additionally, a new useScroll hook has been implemented to manage scrolling more effectively. These updates aim to provide a smoother user experience when new messages arrive and improve the loading of additional content as users scroll.

Changes

File Path	Change Summary
apps/masterbots.ai/components/routes/chat/chat-list.tsx	Enhancements to ChatList with new props for better scrolling behavior and message handling.
apps/masterbots.ai/components/routes/thread/thread-component.tsx	Modifications to ThreadComponent for improved message loading and scrolling; introduced contentRef and isNearBottom.
apps/masterbots.ai/lib/hooks/use-scroll.tsx	Introduction of useScroll hook to manage smooth scrolling and track user position relative to the bottom of the container.

Possibly related PRs

• Hotfix: Infinite loop Issue #261: The changes in the ChatList component within this PR directly relate to the enhancements made in the main PR, as both involve modifications to the ChatList component, specifically focusing on state management and message handling.

Poem

🐇 In the chat where messages flow,
A smooth scroll now steals the show.
With new props and hooks in play,
Messages dance, come what may!
So hop along, don’t miss a beat,
For every chat is now a treat! 🌟

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[sourcery-ai]

Hey @Bran18 - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟡 General issues: 3 issues found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟡 Complexity: 1 issue found
• 🟢 Documentation: all looks good

---

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[Bran18]

Previews

• Screen Recording 2024-09-11 at 10.43.34 PM.mov.zip

• Screen Recording 2024-09-12 at 11.05.15 AM.mov.zip

[coderabbitai]

Actionable comments posted: 1

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between cc3563d and 5ef9f76.

Files selected for processing (3)

• apps/masterbots.ai/components/routes/chat/chat-list.tsx (6 hunks)
• apps/masterbots.ai/components/routes/thread/thread-component.tsx (4 hunks)
• apps/masterbots.ai/lib/hooks/use-scroll.tsx (1 hunks)

Additional comments not posted (10)

apps/masterbots.ai/lib/hooks/use-scroll.tsx (1)

1-64: LGTM!

The useScroll hook is well-structured and follows the React hooks conventions. The two-phase scroll mechanism is implemented correctly and efficiently using IntersectionObserver. The hook automatically scrolls to the bottom when new messages arrive, which improves the user experience. The hook uses useCallback and useEffect hooks appropriately to handle side effects and memoize the smoothScrollToBottom function. The hook uses useState to manage the isNearBottom state. The hook uses requestAnimationFrame to ensure smooth scrolling. The hook uses a dummy element to observe the intersection, which is a common technique. The hook cleans up the IntersectionObserver and removes the dummy element when the component unmounts. The hook has appropriate default values for rootMargin and threshold. The hook has appropriate types for the options and the output.

Great job on implementing this hook! 👍

apps/masterbots.ai/components/routes/thread/thread-component.tsx (4)

9-9: LGTM!

The import statement for useRef is necessary and correctly added.

---

11-11: LGTM!

The import statement for the useScroll hook is correctly added and necessary for the component's functionality.

---

100-112: LGTM!

The changes made to the structure of the component, specifically wrapping the ChatList in a div with contentRef, are a good improvement. This allows for better control over the display of messages and enhances the overall layout of the thread.

The isNearBottom prop is correctly passed to the ChatList component, enabling proper handling of new messages and loading additional content seamlessly.

---

70-72: LGTM!

The modifications to the CSS classes applied to the ChatAccordion component's triggerClass prop are valid and appear to be related to styling and visual enhancements. The addition of dark mode classes, hover effects, and adjustments to the background colors based on the accordion's state should improve the overall user experience and visual appeal of the component.

apps/masterbots.ai/components/routes/chat/chat-list.tsx (5)

11-11: LGTM!

The import statement for the useScroll hook is correct.

---

22-23: LGTM!

The new optional props containerRef and isNearBottom are correctly typed and will likely be used for implementing the two-phase scroll mechanism.

---

39-41: LGTM!

The destructuring of the new props containerRef and isNearBottom is correct and consistent with the changes made to the ChatList interface.

---

50-57: LGTM!

The code correctly handles the case when no containerRef is passed by using a local ref. The useScroll hook is used to manage the scrolling behavior based on new content, which is a good implementation of the two-phase scroll mechanism.

---

82-82: LGTM!

Passing the effectiveContainerRef to the ref attribute of the outer div is correct and necessary for the useScroll hook to work properly.

[coderabbitai]

Actionable comments posted: 2

Outside diff range and nitpick comments (1)

apps/masterbots.ai/components/routes/thread/thread-component.tsx (1)

39-39: Remove the console log statement before merging.

The console log statement seems to be used for debugging purposes. It is generally recommended to remove such statements before merging the code to production to avoid cluttering the console output and potentially exposing sensitive information.

Consider removing the following line:

console.log('isNearBottom 🖐️', isNearBottom)

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 5ef9f76 and 113168c.

Files selected for processing (3)

• apps/masterbots.ai/components/routes/chat/chat-list.tsx (7 hunks)
• apps/masterbots.ai/components/routes/thread/thread-component.tsx (3 hunks)
• apps/masterbots.ai/lib/hooks/use-scroll.tsx (1 hunks)

Files skipped from review as they are similar to previous changes (1)

• apps/masterbots.ai/components/routes/chat/chat-list.tsx

Additional comments not posted (3)

apps/masterbots.ai/components/routes/thread/thread-component.tsx (2)

78-90: LGTM!

The changes made in this code segment are well-structured and improve the management of the thread content.

• Using the contentRef for overflow management is a good practice to control the scrollable area of the thread.
• Passing the contentRef and isNearBottom to the ChatList component allows for better coordination between the thread component and the message list, enabling proper handling of message display and loading behavior.

Overall, these changes enhance the usability and responsiveness of the thread component.

---

48-50: LGTM!

The CSS classes applied to the ChatAccordion component's trigger element are correctly used for styling purposes. The combination of dark mode classes and state-based classes allows for proper theming and visual feedback based on the application's theme and the accordion's state.

The changes made in this code segment are good to go.

apps/masterbots.ai/lib/hooks/use-scroll.tsx (1)

1-103: The useScroll hook implementation looks great! 👍

The hook follows best practices for React hooks and implements the two-phase scroll mechanism correctly. The use of IntersectionObserver is a good choice for detecting when the thread is near the bottom and when the user has reached the end of the thread. The hook also handles the cleanup of the IntersectionObservers correctly.

The separation of concerns between the scrolling logic and the infinite scroll logic is well done. The hook uses appropriate dependencies for the useEffect and useCallback hooks to avoid unnecessary re-renders and ensure correct behavior.

Overall, the hook implementation is clean, efficient, and follows best practices. Great job! 🚀

[AndlerRL]

Brandon Development Support - September 2024