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

// @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 {General, System} from '../types/content';

const FOOTER_SYNC_ID = 'footerSyncId';

const CPU     = 'cpu';
const MEMORY  = 'memory';
const DISK    = 'disk';
const TRAFFIC = 'traffic';

const TOP = 'Top';
const BOTTOM = 'Bottom';

// 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%',
    },
};

// themeStyles returns the styles generated from the theme for the component.
const themeStyles: Object = (theme: Object) => ({
    footer: {
        backgroundColor: theme.palette.grey[900],
        color:           theme.palette.getContrastText(theme.palette.grey[900]),
        zIndex:          theme.zIndex.appBar,
        height:          theme.spacing.unit * 10,
    },
});

export type Props = {
    classes: Object, // injected by withStyles()
    theme: Object,
    general: General,
    system: System,
    shouldUpdate: Object,
};

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

    // halfHeightChart renders an area chart with half of the height of its parent.
    halfHeightChart = (chartProps, tooltip, areaProps) => (
        <ResponsiveContainer width='100%' height='50%'>
            <AreaChart {...chartProps} >
                {!tooltip || (<Tooltip cursor={false} content={<CustomTooltip tooltip={tooltip} />} />)}
                <Area isAnimationActive={false} type='monotone' {...areaProps} />
            </AreaChart>
        </ResponsiveContainer>
    );

    // doubleChart renders a pair of charts separated by the baseline.
    doubleChart = (syncId, chartKey, topChart, bottomChart) => {
        if (!Array.isArray(topChart.data) || !Array.isArray(bottomChart.data)) {
            return null;
        }
        const topDefault = topChart.default || 0;
        const bottomDefault = bottomChart.default || 0;
        const topKey = `${chartKey}${TOP}`;
        const bottomKey = `${chartKey}${BOTTOM}`;
        const topColor = '#8884d8';
        const bottomColor = '#82ca9d';

        return (
            <div style={styles.doubleChartWrapper}>
                {this.halfHeightChart(
                    {
                        syncId,
                        data:   topChart.data.map(({value}) => ({[topKey]: value || topDefault})),
                        margin: {top: 5, right: 5, bottom: 0, left: 5},
                    },
                    topChart.tooltip,
                    {dataKey: topKey, stroke: topColor, fill: topColor},
                )}
                {this.halfHeightChart(
                    {
                        syncId,
                        data:   bottomChart.data.map(({value}) => ({[bottomKey]: -value || -bottomDefault})),
                        margin: {top: 0, right: 5, bottom: 5, left: 5},
                    },
                    bottomChart.tooltip,
                    {dataKey: bottomKey, stroke: bottomColor, fill: bottomColor},
                )}
            </div>
        );
    };

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

        return (
            <Grid container className={this.props.classes.footer} direction='row' alignItems='center' style={styles.footer}>
                <Grid item xs style={styles.chartRowWrapper}>
                    <ChartRow>
                        {this.doubleChart(
                            FOOTER_SYNC_ID,
                            CPU,
                            {data: system.processCPU, tooltip: percentPlotter('Process load')},
                            {data: system.systemCPU, tooltip: percentPlotter('System load', multiplier(-1))},
                        )}
                        {this.doubleChart(
                            FOOTER_SYNC_ID,
                            MEMORY,
                            {data: system.activeMemory, tooltip: bytePlotter('Active memory')},
                            {data: system.virtualMemory, tooltip: bytePlotter('Virtual memory', multiplier(-1))},
                        )}
                        {this.doubleChart(
                            FOOTER_SYNC_ID,
                            DISK,
                            {data: system.diskRead, tooltip: bytePerSecPlotter('Disk read')},
                            {data: system.diskWrite, tooltip: bytePerSecPlotter('Disk write', multiplier(-1))},
                        )}
                        {this.doubleChart(
                            FOOTER_SYNC_ID,
                            TRAFFIC,
                            {data: system.networkIngress, tooltip: bytePerSecPlotter('Download')},
                            {data: system.networkEgress, tooltip: bytePerSecPlotter('Upload', multiplier(-1))},
                        )}
                    </ChartRow>
                </Grid>
                <Grid item >
                    <Typography type='caption' color='inherit'>
                        <span style={commonStyles.light}>Geth</span> {general.version}
                    </Typography>
                    {general.commit && (
                        <Typography type='caption' color='inherit'>
                            <span style={commonStyles.light}>{'Commit '}</span>
                            <a href={`https://github.com/dexon-foundation/dexon/commit/${general.commit}`} target='_blank' style={{color: 'inherit', textDecoration: 'none'}} >
                                {general.commit.substring(0, 8)}
                            </a>
                        </Typography>
                    )}
                </Grid>
            </Grid>
        );
    }
}

export default withStyles(themeStyles)(Footer);