import { Component } from "react";
import PropTypes from "prop-types";
import OHIF from 'ohif-core';

const { StudyPrefetcher } = OHIF.classes;

class StudyPrefetch extends Component {
    static propTypes = {
        studies: PropTypes.array,
    };

    componentDidMount() {
        const { studies } = this.props;

        this.studyPrefetcher = StudyPrefetcher.getInstance();
        this.studyPrefetcher.setStudies(studies);
    }

    render() {
        return null;
    }

    componentWillUnmount() {
        // Stop prefetching when we close the viewer
        this.studyPrefetcher.destroy();
    }
}


export default StudyPrefetch;