unleash.unleash/frontend/src/component/application/ApplicationList.tsx

import React, { Component, useEffect } from 'react';
import PropTypes from 'prop-types';
import { CircularProgress } from '@material-ui/core';
import { Warning } from '@material-ui/icons';

import { AppsLinkList, styles as commonStyles } from '../common';
import SearchField from '../common/SearchField/SearchField';
import PageContent from '../common/PageContent/PageContent';
import HeaderTitle from '../common/HeaderTitle';
import useApplications from '../../hooks/api/getters/useApplications/useApplications';

const ApplicationList = () => {
    //missing useSettings
    const { applications, refetchApplications } = useApplications();

    useEffect(() => {
        refetchApplications();
    }, []);

    if (!applications) {
        return <CircularProgress variant="indeterminate" />;
    }
    return (
        <>
            <div className={commonStyles.searchField}>
                <SearchField
                    value={this.props.settings.filter}
                    updateValue={this.props.updateSetting.bind(this, 'filter')}
                />
            </div>
            <PageContent headerContent={<HeaderTitle title="Applications" />}>
                <div className={commonStyles.fullwidth}>
                    {applications.length > 0 ? (
                        <AppsLinkList apps={applications} />
                    ) : (
                        <Empty />
                    )}
                </div>
            </PageContent>
        </>
    );
};

export default ApplicationList;

const Empty = () => (
    <React.Fragment>
        <section style={{ textAlign: 'center' }}>
            <Warning /> <br />
            <br />
            Oh snap, it does not seem like you have connected any applications.
            To connect your application to Unleash you will require a Client
            SDK.
            <br />
            <br />
            You can read more about how to use Unleash in your application in
            the{' '}
            <a href="https://docs.getunleash.io/docs/sdks/">documentation.</a>
        </section>
    </React.Fragment>
);

class ClientStrategies extends Component {
    static propTypes = {
        applications: PropTypes.array,
        fetchAll: PropTypes.func.isRequired,
        settings: PropTypes.object.isRequired,
        updateSetting: PropTypes.func.isRequired,
    };
}