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path: root/dashboard/assets/components/Footer.jsx
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// @flow

// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

import React, {Component} from 'react';

import withStyles from 'material-ui/styles/withStyles';
import Typography from 'material-ui/Typography';
import Grid from 'material-ui/Grid';
import {ResponsiveContainer, AreaChart, Area, Tooltip} from 'recharts';

import ChartRow from './ChartRow';
import CustomTooltip, {bytePlotter, bytePerSecPlotter, percentPlotter, multiplier} from './CustomTooltip';
import {styles as commonStyles} from '../common';
import type {Content} from '../types/content';

// styles contains the constant styles of the component.
const styles = {
    footer: {
        maxWidth: '100%',
        flexWrap: 'nowrap',
        margin:   0,
    },
    chartRowWrapper: {
        height:  '100%',
        padding: 0,
    },
    doubleChartWrapper: {
        height:     '100%',
        width:      '99%',
        paddingTop: 5,
    },
};

// themeStyles returns the styles generated from the theme for the component.
const themeStyles: Object = (theme: Object) => ({
    footer: {
        backgroundColor: theme.palette.background.appBar,
        color:           theme.palette.getContrastText(theme.palette.background.appBar),
        zIndex:          theme.zIndex.appBar,
        height:          theme.spacing.unit * 10,
    },
});

export type Props = {
    classes: Object, // injected by withStyles()
    theme: Object,
    content: Content,
    shouldUpdate: Object,
};

// Footer renders the footer of the dashboard.
class Footer extends Component<Props> {
    shouldComponentUpdate(nextProps) {
        return typeof nextProps.shouldUpdate.home !== 'undefined';
    }

    // info renders a label with the given values.
    info = (about: string, value: ?string) => (value ? (
        <Typography type='caption' color='inherit'>
            <span style={commonStyles.light}>{about}</span> {value}
        </Typography>
    ) : null);

    // doubleChart renders a pair of charts separated by the baseline.
    doubleChart = (syncId, topChart, bottomChart) => {
        const topKey = 'topKey';
        const bottomKey = 'bottomKey';
        const topDefault = topChart.default ? topChart.default : 0;
        const bottomDefault = bottomChart.default ? bottomChart.default : 0;
        const topTooltip = topChart.tooltip ? (
            <Tooltip cursor={false} content={<CustomTooltip tooltip={topChart.tooltip} />} />
        ) : null;
        const bottomTooltip = bottomChart.tooltip ? (
            <Tooltip cursor={false} content={<CustomTooltip tooltip={bottomChart.tooltip} />} />
        ) : null;
        const topColor = '#8884d8';
        const bottomColor = '#82ca9d';

        // Put the samples of the two charts into the same array in order to avoid problems
        // at the synchronized area charts. If one of the two arrays doesn't have value at
        // a given position, give it a 0 default value.
        let data = [...topChart.data.map(({value}) => {
            const d = {};
            d[topKey] = value || topDefault;
            return d;
        })];
        for (let i = 0; i < data.length && i < bottomChart.data.length; i++) {
            // The value needs to be negative in order to plot it upside down.
            const d = bottomChart.data[i];
            data[i][bottomKey] = d && d.value ? -d.value : bottomDefault;
        }
        data = [...data, ...bottomChart.data.slice(data.length).map(({value}) => {
            const d = {};
            d[topKey] = topDefault;
            d[bottomKey] = -value || bottomDefault;
            return d;
        })];

        return (
            <div style={styles.doubleChartWrapper}>
                <ResponsiveContainer width='100%' height='50%'>
                    <AreaChart data={data} syncId={syncId} >
                        {topTooltip}
                        <Area type='monotone' dataKey={topKey} stroke={topColor} fill={topColor} />
                    </AreaChart>
                </ResponsiveContainer>
                <div style={{marginTop: -10, width: '100%', height: '50%'}}>
                    <ResponsiveContainer width='100%' height='100%'>
                        <AreaChart data={data} syncId={syncId} >
                            {bottomTooltip}
                            <Area type='monotone' dataKey={bottomKey} stroke={bottomColor} fill={bottomColor} />
                        </AreaChart>
                    </ResponsiveContainer>
                </div>
            </div>
        );
    }

    render() {
        const {content} = this.props;
        const {general, home} = content;

        return (
            <Grid container className={this.props.classes.footer} direction='row' alignItems='center' style={styles.footer}>
                <Grid item xs style={styles.chartRowWrapper}>
                    <ChartRow>
                        {this.doubleChart(
                            'all',
                            {data: home.processCPU, tooltip: percentPlotter('Process')},
                            {data: home.systemCPU, tooltip: percentPlotter('System', multiplier(-1))},
                        )}
                        {this.doubleChart(
                            'all',
                            {data: home.activeMemory, tooltip: bytePlotter('Active')},
                            {data: home.virtualMemory, tooltip: bytePlotter('Virtual', multiplier(-1))},
                        )}
                        {this.doubleChart(
                            'all',
                            {data: home.diskRead, tooltip: bytePerSecPlotter('Disk Read')},
                            {data: home.diskWrite, tooltip: bytePerSecPlotter('Disk Write', multiplier(-1))},
                        )}
                        {this.doubleChart(
                            'all',
                            {data: home.networkIngress, tooltip: bytePerSecPlotter('Download')},
                            {data: home.networkEgress, tooltip: bytePerSecPlotter('Upload', multiplier(-1))},
                        )}
                    </ChartRow>
                </Grid>
                <Grid item >
                    {this.info('Geth', general.version)}
                    {this.info('Commit', general.commit ? general.commit.substring(0, 7) : null)}
                </Grid>
            </Grid>
        );
    }
}

export default withStyles(themeStyles)(Footer);