frontend/src/layout/MainLayout.jsx

import React, { useContext, useState } from "react";

import { Outlet } from "react-router-dom";
import {
  AppShell,
  Burger,
  Container,
  Header,
  MediaQuery,
  Navbar,
  Paper,
  Text,
  createStyles,
  useMantineTheme,
} from "@mantine/core";

import UserDataContextProvider, {
  UserDataContext,
} from "../context/user-data-context";
import MainLoader from "../components/MainLoader";
import NavbarLinks from "../components/NavbarLinks";
import Logout from "../components/Logout";

const useStyles = createStyles(() => ({
  body: {
    width: "100%",
    height: "100%",
  },
  root: {
    width: "100%",
    height: "100vh",
  },
  main: {
    width: "100%",
    height: "100vh",
  },
}));

const MainLayout = () => {
  const { classes } = useStyles();
  const theme = useMantineTheme();
  const [opened, setOpened] = useState(false);
  const { isLoggedIn, errorMessage } = useContext(UserDataContext);

  if (!isLoggedIn) {
    return <MainLoader errorMessage={errorMessage} />;
  }

  return (
    <UserDataContextProvider>
      <Paper>
        <AppShell
          classNames={{
            body: classes.body,
            root: classes.root,
            main: classes.main,
          }}
          styles={{
            main: {
              background:
                theme.colorScheme === "dark" ? "#302e2a" : theme.colors.gray[0],
            },
            body: {
              textAlign: "center",
            },
          }}
          layout="alt"
          navbar={
            <Navbar
              py="md"
              px="0"
              hiddenBreakpoint="md"
              sx={{ backgroundColor: "#262523" }}
              hidden={!opened}
              width={{ md: 150 }}
            >
              <Navbar.Section>
                <Text size={30} weight={700}>
                  Chess
                </Text>
              </Navbar.Section>
              <Navbar.Section grow mt="md">
                <NavbarLinks />
              </Navbar.Section>
              <Navbar.Section>
                <Logout />
              </Navbar.Section>
            </Navbar>
          }
          header={
            <MediaQuery largerThan="sm" styles={{ display: "none" }}>
              <Header zIndex={1000} p="md">
                <div
                  style={{
                    display: "flex",
                    alignItems: "center",
                    height: "100%",
                  }}
                >
                  <Burger
                    opened={opened}
                    onClick={() => setOpened((o) => !o)}
                    size="sm"
                    color={theme.colors.gray[6]}
                    mr="xl"
                  />

                  <Text>Application header</Text>
                </div>
              </Header>
            </MediaQuery>
          }
          padding
        >
          <Container
            size="100%"
            style={{ height: "100vh" }}
            pl={{ md: 150 }}
            pr={{ md: 0 }}
          >
            <Outlet />
          </Container>
        </AppShell>
      </Paper>
    </UserDataContextProvider>
  );
};

export default MainLayout;