added an update checker button for library (#172)

* added an update checker button for library

* fixed import path

* fixed progress props to not be inline

* added error handling

* fixed linting issue

src/components/library/UpdateChecker.tsx

@@ -0,0 +1,67 @@
+import React, { useEffect, useState } from 'react';
+import IconButton from '@mui/material/IconButton';
+import RefreshIcon from '@mui/icons-material/Refresh';
+import CircularProgress from '@mui/material/CircularProgress';
+import { Box } from '@mui/system';
+import Typography from '@mui/material/Typography';
+import client from 'util/client';
+import makeToast from '../util/Toast';
+
+interface IProgressProps {
+    progress: number
+}
+
+function Progress({ progress }: IProgressProps) {
+    return (
+        <Box sx={{ display: 'grid', placeItems: 'center', position: 'relative' }}>
+            <CircularProgress variant="determinate" value={progress} />
+            <Box sx={{ position: 'absolute' }}>
+                <Typography fontSize="0.8rem">
+                    {`${Math.round(progress)}%`}
+                </Typography>
+            </Box>
+        </Box>
+
+    );
+}
+
+const baseWebsocketUrl = JSON.parse(window.localStorage.getItem('serverBaseURL')!).replace('http', 'ws');
+
+function UpdateChecker() {
+    const [loading, setLoading] = useState(false);
+    const [progress, setProgress] = useState(0);
+
+    const onClick = async () => {
+        try {
+            setLoading(true);
+            setProgress(0);
+            await client.post('/api/v1/update/fetch');
+        } catch (e) {
+            makeToast('Checking for updates failed!', 'error');
+            setLoading(false);
+        }
+    };
+
+    useEffect(() => {
+        const wsc = new WebSocket(`${baseWebsocketUrl}/api/v1/update`);
+        wsc.onmessage = (e) => {
+            const data = JSON.parse(e.data) as IUpdateStatus;
+            const { COMPLETE, RUNNING, PENDING } = data.statusMap;
+
+            setLoading(data.running);
+            const currentProgress = 100 * (COMPLETE / (COMPLETE + RUNNING + PENDING));
+
+            setProgress(Number.isNaN(currentProgress) ? 0 : currentProgress);
+        };
+
+        return () => wsc.close();
+    }, []);
+
+    return (
+        <IconButton onClick={onClick} disabled={loading}>
+            {loading ? <Progress progress={progress} /> : <RefreshIcon />}
+        </IconButton>
+    );
+}
+
+export default UpdateChecker;