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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 | 1x 1x 1x 1x 1x 1x 1x 13x 1x 31x 31x 31x 31x 31x 31x 31x 31x 13x 13x 13x 31x 13x 13x 31x 13x 13x 13x 31x 31x 16x 16x 16x 16x 3x 3x | import classNames from "classnames";
import CircularProgress from "components/CircularProgress";
import { useAuthContext } from "features/auth/AuthProvider";
import { messageElementId } from "features/messages/messagelist/MessageView";
import { Message } from "proto/conversations_pb";
import {
ReactNode,
useCallback,
useEffect,
useLayoutEffect,
useRef,
} from "react";
import makeStyles from "utils/makeStyles";
import useOnVisibleEffect from "utils/useOnVisibleEffect";
const useStyles = makeStyles((theme) => ({
loader: {
"& > *": {
display: "block",
marginInlineEnd: "auto",
marginInlineStart: "auto",
},
paddingTop: theme.spacing(1),
position: "absolute",
top: 0,
width: "100%",
},
scroll: {
position: "relative",
minHeight: "80px",
"&::-webkit-scrollbar": {
background: "rgba(0,0,0,0)",
height: "0.5rem",
width: "0.5rem",
},
"&::-webkit-scrollbar:hover": {
background: "rgba(0,0,0,0.1)",
width: "0.5rem",
},
"&::-webkit-scrollbar-thumb": {
background: "rgba(0,0,0,0.2)",
borderRadius: "20px",
},
"&::-webkit-scrollbar-thumb:hover": {
background: "rgba(0,0,0,0.3)",
},
overflowY: "auto",
overflowX: "hidden",
paddingInlineEnd: `0.5rem`,
scrollbarHeight: "thin",
scrollbarWidth: "thin",
},
}));
interface InfiniteMessageLoaderProps {
earliestMessageId?: number;
latestMessage?: Message.AsObject;
fetchNextPage: () => void;
isFetchingNextPage: boolean;
hasNextPage: boolean;
isError: boolean;
className?: string;
children: ReactNode;
}
export default function InfiniteMessageLoader({
earliestMessageId,
latestMessage,
fetchNextPage,
isFetchingNextPage,
hasNextPage,
isError,
className,
children,
}: InfiniteMessageLoaderProps) {
const classes = useStyles();
const { authState } = useAuthContext();
const scrollRef = useRef<HTMLDivElement>(null);
const prevScrollHeight = useRef<number | undefined>(undefined);
const prevTopMessageId = useRef<number | null>(null);
const handleLoadMoreVisible = useCallback(() => {
prevScrollHeight.current = scrollRef.current?.scrollHeight;
Iif (earliestMessageId) {
prevTopMessageId.current = earliestMessageId;
}
fetchNextPage();
}, [earliestMessageId, fetchNextPage]);
const { ref: loadMoreRef } = useOnVisibleEffect(handleLoadMoreVisible);
useLayoutEffect(() => {
Iif (isFetchingNextPage) return;
const messageEl = document.getElementById(
messageElementId(prevTopMessageId.current ?? 0)
);
messageEl?.scrollIntoView();
}, [isFetchingNextPage]);
// Scroll to bottom on load
useLayoutEffect(() => {
Iif (!scrollRef.current) return;
scrollRef.current.scroll(0, scrollRef.current.scrollHeight);
}, []);
//** Keep place or keep at bottom on window resize (i.e. keyboard popup on mobile (hopefully)) **//
useEffect(() => {
const updateMessagePosition = () => {
Iif (!scrollRef.current) return;
scrollRef.current.scroll(0, scrollRef.current.scrollHeight);
};
window.addEventListener("resize", updateMessagePosition);
return () => window.removeEventListener("resize", updateMessagePosition);
}, []);
//** Scroll to the bottom after sending own new message **//
const savedMessageId = useRef(latestMessage?.messageId);
useLayoutEffect(() => {
Iif (!scrollRef.current) return;
const isUserMessage = latestMessage?.authorUserId === authState.userId;
const isNewMessage = latestMessage?.messageId !== savedMessageId.current;
if (isUserMessage && isNewMessage) {
scrollRef.current.scroll(0, scrollRef.current.scrollHeight);
savedMessageId.current = latestMessage?.messageId;
}
}, [latestMessage?.messageId, latestMessage?.authorUserId, authState.userId]);
return (
<div className={classNames(classes.scroll, className)} ref={scrollRef}>
{hasNextPage && !isError && (
<div className={classes.loader}>
{isFetchingNextPage ? (
<CircularProgress />
) : (
<CircularProgress
variant="determinate"
value={0}
ref={loadMoreRef}
/>
)}
</div>
)}
{children}
</div>
);
}
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