From 538d6830a0022b49b99695095d85e567b0c86e71 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Sun, 30 Jul 2023 23:47:53 +0800
Subject: ...

---
 FrontEnd/src/pages/timeline/Timeline.tsx | 207 +++++++++++++++++++++++++++++++
 1 file changed, 207 insertions(+)
 create mode 100644 FrontEnd/src/pages/timeline/Timeline.tsx

(limited to 'FrontEnd/src/pages/timeline/Timeline.tsx')

diff --git a/FrontEnd/src/pages/timeline/Timeline.tsx b/FrontEnd/src/pages/timeline/Timeline.tsx
new file mode 100644
index 00000000..3a7fbd00
--- /dev/null
+++ b/FrontEnd/src/pages/timeline/Timeline.tsx
@@ -0,0 +1,207 @@
+import * as React from "react";
+import classnames from "classnames";
+import { useScrollToBottom } from "@/utilities/hooks";
+import { HubConnectionState } from "@microsoft/signalr";
+
+import {
+  HttpForbiddenError,
+  HttpNetworkError,
+  HttpNotFoundError,
+} from "@/http/common";
+import {
+  getHttpTimelineClient,
+  HttpTimelineInfo,
+  HttpTimelinePostInfo,
+} from "@/http/timeline";
+
+import { useUser } from "@/services/user";
+import { getTimelinePostUpdate$ } from "@/services/timeline";
+
+import TimelinePostListView from "./TimelinePostListView";
+import TimelineEmptyItem from "./TimelineEmptyItem";
+import TimelineLoading from "./TimelineLoading";
+import TimelinePostEdit from "./TimelinePostEdit";
+import TimelinePostEditNoLogin from "./TimelinePostEditNoLogin";
+import TimelineCard from "./TimelineCard";
+
+import "./Timeline.css";
+
+export interface TimelineProps {
+  className?: string;
+  style?: React.CSSProperties;
+  timelineOwner: string;
+  timelineName: string;
+}
+
+const Timeline: React.FC<TimelineProps> = (props) => {
+  const { timelineOwner, timelineName, className, style } = props;
+
+  const user = useUser();
+
+  const [timeline, setTimeline] = React.useState<HttpTimelineInfo | null>(null);
+  const [posts, setPosts] = React.useState<HttpTimelinePostInfo[] | null>(null);
+  const [signalrState, setSignalrState] = React.useState<HubConnectionState>(
+    HubConnectionState.Connecting
+  );
+  const [error, setError] = React.useState<
+    "offline" | "forbid" | "notfound" | "error" | null
+  >(null);
+
+  const [currentPage, setCurrentPage] = React.useState(1);
+  const [totalPage, setTotalPage] = React.useState(0);
+
+  const [timelineReloadKey, setTimelineReloadKey] = React.useState(0);
+  const [postsReloadKey, setPostsReloadKey] = React.useState(0);
+
+  const updateTimeline = (): void => setTimelineReloadKey((o) => o + 1);
+  const updatePosts = (): void => setPostsReloadKey((o) => o + 1);
+
+  React.useEffect(() => {
+    setTimeline(null);
+    setPosts(null);
+    setError(null);
+    setSignalrState(HubConnectionState.Connecting);
+  }, [timelineOwner, timelineName]);
+
+  React.useEffect(() => {
+    getHttpTimelineClient()
+      .getTimeline(timelineOwner, timelineName)
+      .then(
+        (t) => {
+          setTimeline(t);
+        },
+        (error) => {
+          if (error instanceof HttpNetworkError) {
+            setError("offline");
+          } else if (error instanceof HttpForbiddenError) {
+            setError("forbid");
+          } else if (error instanceof HttpNotFoundError) {
+            setError("notfound");
+          } else {
+            console.error(error);
+            setError("error");
+          }
+        }
+      );
+  }, [timelineOwner, timelineName, timelineReloadKey]);
+
+  React.useEffect(() => {
+    getHttpTimelineClient()
+      .listPost(timelineOwner, timelineName, 1)
+      .then(
+        (page) => {
+          setPosts(
+            page.items.filter((p): p is HttpTimelinePostInfo => !p.deleted)
+          );
+          setTotalPage(page.totalPageCount);
+        },
+        (error) => {
+          if (error instanceof HttpNetworkError) {
+            setError("offline");
+          } else if (error instanceof HttpForbiddenError) {
+            setError("forbid");
+          } else if (error instanceof HttpNotFoundError) {
+            setError("notfound");
+          } else {
+            console.error(error);
+            setError("error");
+          }
+        }
+      );
+  }, [timelineOwner, timelineName, postsReloadKey]);
+
+  React.useEffect(() => {
+    const timelinePostUpdate$ = getTimelinePostUpdate$(
+      timelineOwner,
+      timelineName
+    );
+    const subscription = timelinePostUpdate$.subscribe(({ update, state }) => {
+      if (update) {
+        setPostsReloadKey((o) => o + 1);
+      }
+      setSignalrState(state);
+    });
+    return () => {
+      subscription.unsubscribe();
+    };
+  }, [timelineOwner, timelineName]);
+
+  useScrollToBottom(() => {
+    console.log(`Load page ${currentPage + 1}.`);
+    setCurrentPage(currentPage + 1);
+    void getHttpTimelineClient()
+      .listPost(timelineOwner, timelineName, currentPage + 1)
+      .then(
+        (page) => {
+          const ps = page.items.filter(
+            (p): p is HttpTimelinePostInfo => !p.deleted
+          );
+          setPosts((old) => [...(old ?? []), ...ps]);
+        },
+        (error) => {
+          if (error instanceof HttpNetworkError) {
+            setError("offline");
+          } else if (error instanceof HttpForbiddenError) {
+            setError("forbid");
+          } else if (error instanceof HttpNotFoundError) {
+            setError("notfound");
+          } else {
+            console.error(error);
+            setError("error");
+          }
+        }
+      );
+  }, currentPage < totalPage);
+
+  if (error === "offline") {
+    return (
+      <div className={className} style={style}>
+        Offline.
+      </div>
+    );
+  } else if (error === "notfound") {
+    return (
+      <div className={className} style={style}>
+        Not exist.
+      </div>
+    );
+  } else if (error === "forbid") {
+    return (
+      <div className={className} style={style}>
+        Forbid.
+      </div>
+    );
+  } else if (error === "error") {
+    return (
+      <div className={className} style={style}>
+        Error.
+      </div>
+    );
+  }
+  return (
+    <>
+      {timeline == null && posts == null && <TimelineLoading />}
+      {timeline && (
+        <TimelineCard
+          className="timeline-card"
+          timeline={timeline}
+          connectionStatus={signalrState}
+          onReload={updateTimeline}
+        />
+      )}
+      {posts && (
+        <div style={style} className={classnames("timeline", className)}>
+          <TimelineEmptyItem className="timeline-top" height={50} />
+          {timeline?.postable ? (
+            <TimelinePostEdit timeline={timeline} onPosted={updatePosts} />
+          ) : user == null ? (
+            <TimelinePostEditNoLogin />
+          ) : null}
+          <TimelinePostListView posts={posts} onReload={updatePosts} />
+        </div>
+      )}
+    </>
+  );
+};
+
+export default Timeline;
-- 
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