visiome.neuroinf.jp/src/database/DatabaseDetailItem.tsx

import { Helmet } from '@dr.pogodin/react-helmet';
import { useEffect, useState } from 'react';
import { useParams } from 'react-router';
import Loading from '../common/lib/Loading';
import PageNotFound from '../common/lib/PageNotFound';
import type { MultiLang } from '../config';
import Functions from '../functions';
import ItemType from './item-type';
import ItemUtil, { type Item } from './lib/ItemUtil';

interface Props {
    lang: MultiLang;
}

const DatabaseDetailItem = (props: Props) => {
    const { lang } = props;
    const params = useParams<{ id?: string; doi?: string }>();
    const id = typeof params.id !== 'undefined' ? (params.id.match(/^\d+$/) !== null ? parseInt(params.id, 10) : 0) : 0;
    const doi = params.doi ?? '';
    const [loading, setLoading] = useState(true);
    const [item, setItem] = useState<Item | null>(null);

    useEffect(() => {
        let active = true;
        const receive = (found: Item | null) => {
            if (active) {
                setItem(found);
                setLoading(false);
            }
        };
        if (doi !== '') {
            ItemUtil.getByDoi(doi, receive);
        } else if (id !== 0) {
            ItemUtil.get(id, receive);
        } else {
            receive(null);
        }
        return () => {
            active = false;
        };
    }, [id, doi]);

    if (loading) {
        return <Loading />;
    }
    if (item === null) {
        return <PageNotFound lang={lang} />;
    }
    return (
        <>
            <Helmet>
                <title>
                    {Functions.mlang(item.title, lang)} -{' '}
                    {Functions.mlang('[en]Database[/en][ja]データベース[/ja]', lang)} - {Functions.siteTitle(lang)}
                </title>
            </Helmet>
            <h3>{Functions.mlang('[en]Item Detail[/en][ja]アイテム詳細[/ja]', lang)}</h3>
            <br />
            <ItemType.Detail lang={lang} item={item} />
        </>
    );
};

export default DatabaseDetailItem;