dhis2/d2-ui

import React from 'react';
import PropTypes from 'prop-types';
import isArray from 'lodash/fp/isArray';
import log from 'loglevel';

function TwoPanelSelector(props) {
    const { children, childWrapStyle, mainStyle, sizeRatio, ...otherProps } = props;
    const mergedMainStyle = {
        flex: 1,
        display: 'flex',
        flexOrientation: 'row',
        marginTop: '8rem',
        ...mainStyle,
    };

    let childrenToRender;

    if (isArray(children)) {
        // More than two children defeats the purpose of a two panel layout and was probably not what the
        // user of the component intended to do.
        if (children.length > 2) {
            log.warn('You passed more than two children to the <TwoPanel /> component, it requires exactly two');
        }

        // We will always only render two children even when more are passed.
        childrenToRender = children.slice(0, 2);
    } else {
        // Just a single child was passed, log a warning because this will only fill the left bar with content.
        // And it was probably not what the user intended to do.
        log.warn('You passed just one child to the <TwoPanel /> component, it requires exactly two');
        childrenToRender = [children];
    }

    const flexedChilden = childrenToRender
        .map((childComponent, index) => {
            const childStyle = Object
                .assign({}, childWrapStyle, {
                    flex: sizeRatio[index],
                    paddingRight: (index === children.length - 1) ? '2rem' : undefined,
                });

            return (
                <div key={index} style={childStyle}>{childComponent}</div>
            );
        });

    return (
        <main {...otherProps} style={mergedMainStyle}>
            {flexedChilden}
        </main>
    );
}
TwoPanelSelector.propTypes = {
    children: PropTypes.oneOfType([
        PropTypes.array,
        PropTypes.object,
    ]),
    childWrapStyle: PropTypes.object,
    mainStyle: PropTypes.object,
    sizeRatio: PropTypes.array,
};

TwoPanelSelector.defaultProps = {
    sizeRatio: ['0 0 320px', 1],
    children: [],
    childWrapStyle: {},
    mainStyle: {},
};

export default TwoPanelSelector;