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import React from "react";
import { HubConnectionState } from "@microsoft/signalr";
import {
HttpForbiddenError,
HttpNetworkError,
HttpNotFoundError,
} from "@/http/common";
import { getHttpTimelineClient, HttpTimelinePostInfo } from "@/http/timeline";
import { getTimelinePostUpdate$ } from "@/services/timeline";
import TimelinePagedPostListView from "./TimelinePagedPostListView";
import TimelineTop from "./TimelineTop";
import TimelineLoading from "./TimelineLoading";
export interface TimelineProps {
className?: string;
style?: React.CSSProperties;
timelineName?: string;
reloadKey: number;
onReload: () => void;
onConnectionStateChanged?: (state: HubConnectionState) => void;
}
const Timeline: React.FC<TimelineProps> = (props) => {
const { timelineName, className, style, reloadKey } = props;
const [state, setState] = React.useState<
"loading" | "loaded" | "offline" | "notexist" | "forbid" | "error"
>("loading");
const [posts, setPosts] = React.useState<HttpTimelinePostInfo[]>([]);
React.useEffect(() => {
setState("loading");
setPosts([]);
}, [timelineName]);
const onReload = React.useRef<() => void>(props.onReload);
React.useEffect(() => {
onReload.current = props.onReload;
}, [props.onReload]);
const onConnectionStateChanged = React.useRef<
((state: HubConnectionState) => void) | null
>(null);
React.useEffect(() => {
onConnectionStateChanged.current = props.onConnectionStateChanged ?? null;
}, [props.onConnectionStateChanged]);
React.useEffect(() => {
if (timelineName != null && state === "loaded") {
const timelinePostUpdate$ = getTimelinePostUpdate$(timelineName);
const subscription = timelinePostUpdate$.subscribe(
({ update, state }) => {
if (update) {
onReload.current();
}
onConnectionStateChanged.current?.(state);
}
);
return () => {
subscription.unsubscribe();
};
}
}, [timelineName, state]);
React.useEffect(() => {
if (timelineName != null) {
let subscribe = true;
void getHttpTimelineClient()
.listPost(timelineName)
.then(
(data) => {
if (subscribe) {
setState("loaded");
setPosts(data);
}
},
(error) => {
if (error instanceof HttpNetworkError) {
setState("offline");
} else if (error instanceof HttpForbiddenError) {
setState("forbid");
} else if (error instanceof HttpNotFoundError) {
setState("notexist");
} else {
console.error(error);
setState("error");
}
}
);
return () => {
subscribe = false;
};
}
}, [timelineName, reloadKey]);
switch (state) {
case "loading":
return <TimelineLoading />;
case "offline":
return (
<div className={className} style={style}>
Offline.
</div>
);
case "notexist":
return (
<div className={className} style={style}>
Not exist.
</div>
);
case "forbid":
return (
<div className={className} style={style}>
Forbid.
</div>
);
case "error":
return (
<div className={className} style={style}>
Error.
</div>
);
default:
return (
<>
<TimelineTop height={40} />
<TimelinePagedPostListView
posts={posts}
onReload={onReload.current}
/>
</>
);
}
};
export default Timeline;
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