1import {Icon} from '@material-ui/core';
 2import Button from '@material-ui/core/Button';
 3import {makeStyles} from '@material-ui/core/styles';
 4import {useEffect} from 'react';
 5import {useElementSize, useEventListener} from 'usehooks-ts';
 6import Markdown from '../Markdown';
 7import useBannerStore from '../../stores/useBannerStore';
 8
 9interface Props {
10  message: string;
11  open: boolean;
12  onClear?: () => void;
13}
14
15const Banner = (props: Props) => {
16  const {message, open, onClear} = props;
17  const classes = useStyles();
18  const [bannerRef, {height}] = useElementSize();
19  const setBannerHeight = useBannerStore(s => s.setBannerHeight);
20  const setBannerOffset = useBannerStore(s => s.setBannerOffset);
21  useEffect(() => setBannerHeight({height}), [height]);
22
23  if (typeof document != 'undefined') {
24    useEventListener('scroll', () => {
25      const y = window.scrollY;
26      if (y > height) {
27        setBannerOffset({offset: 0})
28      }
29      if (y <= height) {
30        setBannerOffset({offset: height - y});
31      }
32    })
33  }
34
35  if (!open) return null;
36
37  return (
38    <div className={classes.banner} ref={bannerRef}>
39      <Markdown className={classes.htmlReset}>{message}</Markdown>
40      <Button
41        className={classes.clear}
42        onClick={e => {
43          e.stopPropagation();
44          onClear();
45        }}
46      >
47        <Icon>close</Icon>
48      </Button>
49    </div>
50  );
51};
52
53const useStyles = makeStyles(theme => ({
54  banner: {
55    position: 'relative',
56    background: `linear-gradient(90deg, ${theme.palette.secondary.main} 20%, ${theme.palette.primary.main} 90%)`,
57    width: '100%',
58    padding: '12px 60px',
59    textAlign: 'center',
60    zIndex: theme.zIndex.appBar - 1,
61  },
62  clear: {
63    position: 'absolute',
64    right: '12px',
65    bottom: '0',
66    minWidth: '44px',
67    padding: '12px',
68    lineHeight: '1.4em',
69  },
70  htmlReset: {
71    '& a': {
72      color: 'inherit',
73      margin: 0,
74    },
75    '& p': {
76      margin: 0,
77    },
78  },
79}));
80
81export default Banner;