fix chat scroll

package-lock.json

@@ -17,6 +17,7 @@
         "@mui/lab": "^5.0.0-alpha.173",
         "@mui/material": "^5.16.7",
         "@reduxjs/toolkit": "^2.2.7",
+        "@tanstack/react-virtual": "^3.10.8",
         "@testing-library/jest-dom": "^6.4.6",
         "@testing-library/user-event": "^14.5.2",
         "@tiptap/extension-color": "^2.5.9",
@@ -1899,6 +1900,31 @@
       "devOptional": true,
       "license": "MIT"
     },
+    "node_modules/@tanstack/react-virtual": {
+      "version": "3.10.8",
+      "resolved": "https://registry.npmjs.org/@tanstack/react-virtual/-/react-virtual-3.10.8.tgz",
+      "integrity": "sha512-VbzbVGSsZlQktyLrP5nxE+vE1ZR+U0NFAWPbJLoG2+DKPwd2D7dVICTVIIaYlJqX1ZCEnYDbaOpmMwbsyhBoIA==",
+      "dependencies": {
+        "@tanstack/virtual-core": "3.10.8"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/tannerlinsley"
+      },
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0",
+        "react-dom": "^16.8.0 || ^17.0.0 || ^18.0.0"
+      }
+    },
+    "node_modules/@tanstack/virtual-core": {
+      "version": "3.10.8",
+      "resolved": "https://registry.npmjs.org/@tanstack/virtual-core/-/virtual-core-3.10.8.tgz",
+      "integrity": "sha512-PBu00mtt95jbKFi6Llk9aik8bnR3tR/oQP1o3TSi+iG//+Q2RTIzCEgKkHG8BB86kxMNW6O8wku+Lmi+QFR6jA==",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/tannerlinsley"
+      }
+    },
     "node_modules/@testing-library/dom": {
       "version": "10.3.0",
       "resolved": "https://registry.npmjs.org/@testing-library/dom/-/dom-10.3.0.tgz",

package.json

@@ -21,6 +21,7 @@
     "@mui/lab": "^5.0.0-alpha.173",
     "@mui/material": "^5.16.7",
     "@reduxjs/toolkit": "^2.2.7",
+    "@tanstack/react-virtual": "^3.10.8",
     "@testing-library/jest-dom": "^6.4.6",
     "@testing-library/user-event": "^14.5.2",
     "@tiptap/extension-color": "^2.5.9",

src/App.tsx

@@ -149,7 +149,7 @@ const defaultValues: MyContextInterface = {
     message: "",
   },
 };
-export let isMobile = true;
+export let isMobile = false;
 
 const isMobileDevice = () => {
   const userAgent = navigator.userAgent || navigator.vendor || window.opera;

src/components/Chat/ChatList.tsx

@@ -1,16 +1,25 @@
-import React, { useCallback, useState, useEffect, useRef } from 'react';
+import React, { useCallback, useState, useEffect, useRef, useMemo } from 'react';
-import { Virtuoso } from 'react-virtuoso';
+import { useVirtualizer } from '@tanstack/react-virtual';
 import { MessageItem } from './MessageItem';
 import { subscribeToEvent, unsubscribeFromEvent } from '../../utils/events';
+import { useInView } from 'react-intersection-observer'
 
 export const ChatList = ({ initialMessages, myAddress, tempMessages, chatId, onReply, handleReaction, chatReferences, tempChatReferences }) => {
-  const virtuosoRef = useRef();
+  const parentRef = useRef();
   const [messages, setMessages] = useState(initialMessages);
   const [showScrollButton, setShowScrollButton] = useState(false);
   const hasLoadedInitialRef = useRef(false);
-  const isAtBottomRef = useRef(true);  //
+  const isAtBottomRef = useRef(true);
-  // Update message list with unique signatures and tempMessages
+  // const [ref, inView] = useInView({
+  //   threshold: 0.7
+  // })
 
+  // useEffect(() => {
+  //   if (inView) {
+      
+  //   }
+  // }, [inView])
+  // Update message list with unique signatures and tempMessages
   useEffect(() => {
     let uniqueInitialMessagesMap = new Map();
 
@@ -32,9 +41,12 @@ export const ChatList = ({ initialMessages, myAddress, tempMessages, chatId, onR
 
     setTimeout(() => {
       const hasUnreadMessages = totalMessages.some((msg) => msg.unread && !msg?.chatReference);
-  
+      console.log('hasUnreadMessages', hasUnreadMessages)
-      if (virtuosoRef.current) {
+      if (parentRef.current) {
-        if (virtuosoRef.current && !isAtBottomRef.current && hasUnreadMessages) {
+        const { scrollTop, scrollHeight, clientHeight } = parentRef.current;
+      const atBottom = scrollTop + clientHeight >= scrollHeight - 10; // Adjust threshold as needed
+      console.log('atBottom', atBottom, {scrollTop, scrollHeight, clientHeight})
+        if (!atBottom && hasUnreadMessages) {
           setShowScrollButton(hasUnreadMessages);
         } else {
           handleMessageSeen();
@@ -47,45 +59,31 @@ export const ChatList = ({ initialMessages, myAddress, tempMessages, chatId, onR
     }, 500);
   }, [initialMessages, tempMessages]);
 
-
-  
-
   const handleMessageSeen = useCallback(() => {
+    console.log('hello handle seen')
     setMessages((prevMessages) =>
       prevMessages.map((msg) => ({
         ...msg,
         unread: false,
       }))
     );
+    setShowScrollButton(false)
   }, []);
 
-  const scrollToItem = useCallback((index) => {
+  // const scrollToBottom = (initialMsgs) => {
-    if (virtuosoRef.current) {
+  //   const index = initialMsgs ? initialMsgs.length - 1 : messages.length - 1;
-      virtuosoRef.current.scrollToIndex({ index, behavior: 'smooth' });
+  //   if (parentRef.current) {
-    }
+  //     parentRef.current.scrollToIndex(index);
-  }, []);
+  //   }
+  // };
 
   const scrollToBottom = (initialMsgs) => {
-    
+    const index = initialMsgs ? initialMsgs.length - 1 : messages.length - 1;
-    const index = initialMsgs ? initialMsgs.length - 1 : messages.length - 1
+    if (rowVirtualizer) {
-    if (virtuosoRef.current) {
+      rowVirtualizer.scrollToIndex(index, { align: 'end' });
-      virtuosoRef.current.scrollToIndex({ index});
     }
   };
 
-  
-  const handleScroll = (scrollState) => {
-    const { scrollTop, scrollHeight, clientHeight } = scrollState;
-    const isAtBottom = scrollTop + clientHeight >= scrollHeight - 50;
-    const hasUnreadMessages = messages.some((msg) => msg.unread);
-
-    if (isAtBottom) {
-      handleMessageSeen();
-    }
-
-    setShowScrollButton(!isAtBottom && hasUnreadMessages);
-  };
-
   const sentNewMessageGroupFunc = useCallback(() => {
     scrollToBottom();
   }, [messages]);
@@ -97,41 +95,98 @@ export const ChatList = ({ initialMessages, myAddress, tempMessages, chatId, onR
     };
   }, [sentNewMessageGroupFunc]);
 
-  const rowRenderer = (index) => {
+  const lastSignature = useMemo(()=> {
-    let message = messages[index];
+    if(!messages || messages?.length === 0) return null
-    let replyIndex = messages.findIndex((msg)=> msg?.signature === message?.repliedTo)
+    const lastIndex = messages.length - 1
-    let reply
+    return messages[lastIndex]?.signature
-    let reactions = null
+  }, [messages])
-    if(message?.repliedTo && replyIndex !== -1){
+
-      reply = messages[replyIndex]
+  console.log('messages', messages)
+
+  // Initialize the virtualizer
+  const rowVirtualizer = useVirtualizer({
+    count: messages.length,
+    getScrollElement: () => parentRef.current,
+    estimateSize: () => 80, // Provide an estimated height of items, adjust this as needed
+    overscan: 10, // Number of items to render outside the visible area to improve smoothness
+    measureElement:
+    typeof window !== 'undefined' &&
+    navigator.userAgent.indexOf('Firefox') === -1
+      ? element => {
+        console.log('height', element?.getBoundingClientRect().height)
+        return element?.getBoundingClientRect().height
       }
+      : undefined,
+  });
+
+  return (
+<>
+    <div ref={parentRef} style={{ height: '100%', overflow: 'auto', position: 'relative', display: 'flex' }}>
+      <div
+        style={{
+          width: '100%',
+          position: 'relative',
+          display: 'flex',
+          flexDirection: 'column',
+          alignItems: 'center', // Center items horizontally
+          gap: '10px', // Add gap between items
+          flexGrow: 1
+        }}
+      >
+        {rowVirtualizer.getVirtualItems().map((virtualRow) => {
+          const index = virtualRow.index;
+          let message = messages[index];
+          let replyIndex = messages.findIndex((msg) => msg?.signature === message?.repliedTo);
+          let reply;
+          let reactions = null;
+
+          if (message?.repliedTo && replyIndex !== -1) {
+            reply = messages[replyIndex];
+          }
+
           if (message?.message && message?.groupDirectId) {
-       replyIndex = messages.findIndex((msg)=> msg?.signature === message?.message?.repliedTo)
+            replyIndex = messages.findIndex((msg) => msg?.signature === message?.message?.repliedTo);
-     reply
             if (message?.message?.repliedTo && replyIndex !== -1) {
-      reply = messages[replyIndex]
+              reply = messages[replyIndex];
             }
             message = {
               ...(message?.message || {}),
               isTemp: true,
-        unread:  false
+              unread: false,
-      }
+            };
           }
 
           if (chatReferences && chatReferences[message?.signature]) {
             if (chatReferences[message.signature]?.reactions) {
-        reactions = chatReferences[message.signature]?.reactions
+              reactions = chatReferences[message.signature]?.reactions;
             }
           }
-    let isUpdating = false
+
+          let isUpdating = false;
           if (tempChatReferences && tempChatReferences?.find((item) => item?.chatReference === message?.signature)) {
-      isUpdating = true
+            isUpdating = true;
           }
 
           return (
-      <div style={{ padding: '10px 0', display: 'flex', justifyContent: 'center', width: '100%', minHeight: '50px' ,  overscrollBehavior: "none"}}>
+            <div
+            data-index={virtualRow.index} //needed for dynamic row height measurement
+            ref={node => rowVirtualizer.measureElement(node)} //measure dynamic row height
+              key={message.signature}
+              style={{
+                position: 'absolute',
+                top: 0,
+                left: '50%', // Move to the center horizontally
+                transform: `translateY(${virtualRow.start}px) translateX(-50%)`, // Adjust for centering
+                width: '100%', // Control width (90% of the parent)
+                padding: '10px 0',
+                display: 'flex',
+                justifyContent: 'center',
+                overscrollBehavior: 'none',
+              }}
+            >
               <MessageItem
                 isLast={index === messages.length - 1}
+                lastSignature={lastSignature}
                 message={message}
                 onSeen={handleMessageSeen}
                 isTemp={!!message?.isTemp}
@@ -139,36 +194,18 @@ export const ChatList = ({ initialMessages, myAddress, tempMessages, chatId, onR
                 onReply={onReply}
                 reply={reply}
                 replyIndex={replyIndex}
-          scrollToItem={scrollToItem}
+                scrollToItem={(idx) => rowVirtualizer.scrollToIndex(idx)}
                 handleReaction={handleReaction}
                 reactions={reactions}
                 isUpdating={isUpdating}
               />
             </div>
           );
-  };
+        })}
+      </div>
 
-  const handleAtBottomStateChange = (atBottom) => {
-    isAtBottomRef.current = atBottom;
-    if(atBottom){
-      handleMessageSeen();
-      setShowScrollButton(false)
-    }
-  };
-
-  return (
-    <div style={{ position: 'relative', height: '100%', display: 'flex', flexDirection: 'column' }}>
-      <Virtuoso
-        ref={virtuosoRef}
-        data={messages}
-        itemContent={rowRenderer}
-        atBottomThreshold={50}
-        followOutput="smooth"
-        atBottomStateChange={handleAtBottomStateChange}  // Detect bottom status
-        increaseViewportBy={3000}
-        
-      />
       
+    </div>
     {showScrollButton && (
       <button
         onClick={() => scrollToBottom()}
@@ -187,6 +224,7 @@ export const ChatList = ({ initialMessages, myAddress, tempMessages, chatId, onR
         Scroll to Unread Messages
       </button>
     )}
-    </div>
+   </>
+ 
   );
 };

src/components/Chat/MessageItem.tsx

@@ -29,7 +29,8 @@ export const MessageItem = ({
   scrollToItem,
   handleReaction,
   reactions,
-  isUpdating
+  isUpdating,
+  lastSignature
 }) => {
   const { ref, inView } = useInView({
     threshold: 0.7, // Fully visible
@@ -38,13 +39,16 @@ export const MessageItem = ({
 
   useEffect(() => {
     if (inView && message.unread) {
+      console.log('seenlast')
       onSeen(message.id);
     }
   }, [inView, message.id, message.unread, onSeen]);
 
+  console.log('isLast', lastSignature === message?.signature)
+
   return (
     <div
-      ref={isLast ? ref : null}
+      ref={lastSignature === message?.signature ? ref : null}
       style={{
         padding: "10px",
         backgroundColor: "#232428",