cinny/src/app/features/common-settings/general/RoomShareInvite.tsx

import React, { useCallback, useState } from 'react';
import { Box, Button, config, Icon, Icons, Text } from 'folds';
import { QRCodeSVG } from 'qrcode.react';
import { SequenceCard } from '../../../components/sequence-card';
import { SequenceCardStyle } from '../../room-settings/styles.css';
import { SettingTile } from '../../../components/setting-tile';
import { CutoutCard } from '../../../components/cutout-card';
import { useMatrixClient } from '../../../hooks/useMatrixClient';
import { useRoom } from '../../../hooks/useRoom';
import { getMatrixToRoom } from '../../../plugins/matrix-to';

export function RoomShareInvite() {
  const mx = useMatrixClient();
  const room = useRoom();
  const [copied, setCopied] = useState(false);

  const domain = mx.getDomain() ?? undefined;
  const inviteUrl = getMatrixToRoom(room.roomId, domain ? [domain] : undefined);

  const handleCopy = useCallback(() => {
    navigator.clipboard.writeText(inviteUrl).then(() => {
      setCopied(true);
      setTimeout(() => setCopied(false), 2000);
    });
  }, [inviteUrl]);

  return (
    <SequenceCard
      className={SequenceCardStyle}
      variant="SurfaceVariant"
      direction="Column"
      gap="400"
    >
      <SettingTile
        title="Share Room"
        description="Share this invite link so others can join the room."
      />
      <CutoutCard variant="Surface" style={{ padding: config.space.S300 }}>
        <Box direction="Column" gap="300">
          <Box gap="200" alignItems="Center">
            <Box grow="Yes">
              <Text
                size="T200"
                style={{
                  wordBreak: 'break-all',
                  userSelect: 'all',
                }}
              >
                {inviteUrl}
              </Text>
            </Box>
            <Box shrink="No">
              <Button
                size="300"
                variant={copied ? 'Success' : 'Secondary'}
                fill={copied ? 'Solid' : 'Soft'}
                radii="300"
                onClick={handleCopy}
                before={<Icon size="100" src={copied ? Icons.Check : Icons.Link} />}
              >
                <Text size="B300">{copied ? 'Copied!' : 'Copy Link'}</Text>
              </Button>
            </Box>
          </Box>
          <Box justifyContent="Center">
            {/* Generated locally (qrcode.react) — no third-party service, works
                offline + under strict CSP. White padded quiet-zone so the
                default black-on-white code scans on any theme. */}
            <Box
              style={{
                padding: config.space.S200,
                background: '#ffffff',
                borderRadius: config.radii.R300,
                lineHeight: 0,
              }}
            >
              <QRCodeSVG value={inviteUrl} size={160} level="M" title="Room invite QR code" />
            </Box>
          </Box>
        </Box>
      </CutoutCard>
    </SequenceCard>
  );
}