dashboard: send current block to the dashboard client (ethereum#19762)

This adds all dashboard changes from the last couple months.
We're about to remove the dashboard, but decided that we should
get all the recent work in first in case anyone wants to pick up this
project later on.

* cmd, dashboard, eth, p2p: send peer info to the dashboard
* dashboard: update npm packages, improve UI, rebase
* dashboard, p2p: remove println, change doc
* cmd, dashboard, eth, p2p: cleanup after review
* dashboard: send current block to the dashboard client

cmd/geth/config.go

@@ -188,6 +188,11 @@ func makeFullNode(ctx *cli.Context) *node.Node {
 		utils.RegisterEthStatsService(stack, cfg.Ethstats.URL)
 	}
 
+	// Add dashboard daemon if requested. This should be the last registered service
+	// in order to be able to collect information about the other services.
+	if ctx.GlobalBool(utils.DashboardEnabledFlag.Name) {
+		utils.RegisterDashboardService(stack, &cfg.Dashboard, gitCommit)
+	}
 	return stack
 }
 

cmd/utils/flags.go

@@ -1588,9 +1588,18 @@ func RegisterEthService(stack *node.Node, cfg *eth.Config) {
 
 // RegisterDashboardService adds a dashboard to the stack.
 func RegisterDashboardService(stack *node.Node, cfg *dashboard.Config, commit string) {
-	stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
-		return dashboard.New(cfg, commit, ctx.ResolvePath("logs")), nil
+	err := stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
+		var (
+			ethServ *eth.Ethereum
+			lesServ *les.LightEthereum
+		)
+		_ = ctx.Service(&ethServ)
+		_ = ctx.Service(&lesServ)
+		return dashboard.New(cfg, ethServ, lesServ, commit, ctx.ResolvePath("logs")), nil
 	})
+	if err != nil {
+		Fatalf("Failed to register the dashboard service: %v", err)
+	}
 }
 
 // RegisterShhService configures Whisper and adds it to the given node.

dashboard/assets/components/Chain.jsx

@@ -0,0 +1,53 @@
+// @flow
+
+// Copyright 2019 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 type {Chain as ChainType} from '../types/content';
+
+export const inserter = () => (update: ChainType, prev: ChainType) => {
+	if (!update.currentBlock) {
+		return;
+	}
+	if (!prev.currentBlock) {
+		prev.currentBlock = {};
+	}
+	prev.currentBlock.number = update.currentBlock.number;
+	prev.currentBlock.timestamp = update.currentBlock.timestamp;
+	return prev;
+};
+
+// styles contains the constant styles of the component.
+const styles = {};
+
+// themeStyles returns the styles generated from the theme for the component.
+const themeStyles = theme => ({});
+
+export type Props = {
+	content: Content,
+};
+
+type State = {};
+
+// Logs renders the log page.
+class Chain extends Component<Props, State> {
+	render() {
+		return <></>;
+	}
+}
+
+export default Chain;

dashboard/assets/components/Dashboard.jsx

@@ -25,6 +25,7 @@ import Header from 'Header';
 import Body from 'Body';
 import {inserter as logInserter, SAME} from 'Logs';
 import {inserter as peerInserter} from 'Network';
+import {inserter as chainInserter} from 'Chain';
 import {MENU} from '../common';
 import type {Content} from '../types/content';
 
@@ -83,17 +84,24 @@ const appender = <T>(limit: number, mapper = replacer) => (update: Array<T>, pre
 // the execution of unnecessary operations (e.g. copy of the log array).
 const defaultContent: () => Content = () => ({
 	general: {
-		version: null,
 		commit:  null,
+		version: null,
+		genesis: '',
+	},
+	home:  {},
+	chain: {
+		currentBlock: {
+			number:    0,
+			timestamp: 0,
+		},
 	},
-	home:    {},
-	chain:   {},
 	txpool:  {},
 	network: {
 		peers: {
 			bundles: {},
 		},
-		diff: [],
+		diff:            [],
+		activePeerCount: 0,
 	},
 	system: {
 		activeMemory:   [],
@@ -121,9 +129,10 @@ const updaters = {
 	general: {
 		version: replacer,
 		commit:  replacer,
+		genesis: replacer,
 	},
 	home:    null,
-	chain:   null,
+	chain:   chainInserter(),
 	txpool:  null,
 	network: peerInserter(200),
 	system:  {
@@ -241,6 +250,7 @@ class Dashboard extends Component<Props, State> {
 			<div className={this.props.classes.dashboard} style={styles.dashboard}>
 				<Header
 					switchSideBar={this.switchSideBar}
+					content={this.state.content}
 				/>
 				<Body
 					opened={this.state.sideBar}

dashboard/assets/components/Footer.jsx

@@ -32,6 +32,9 @@ import ChartRow from 'ChartRow';
 import CustomTooltip, {bytePlotter, bytePerSecPlotter, percentPlotter, multiplier} from 'CustomTooltip';
 import {chartStrokeWidth, styles as commonStyles} from '../common';
 import type {General, System} from '../types/content';
+import {FontAwesomeIcon} from "@fortawesome/react-fontawesome";
+import {faNetworkWired} from "@fortawesome/free-solid-svg-icons";
+import Toolbar from "@material-ui/core/Toolbar";
 
 const FOOTER_SYNC_ID = 'footerSyncId';
 
@@ -154,6 +157,23 @@ class Footer extends Component<Props, State> {
 
 	render() {
 		const {general, system} = this.props;
+		let network = '';
+		switch (general.genesis) {
+		case '0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3':
+			network = 'main';
+			break;
+		case '0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d':
+			network = 'ropsten';
+			break;
+		case '0x6341fd3daf94b748c72ced5a5b26028f2474f5f00d824504e4fa37a75767e177':
+			network = 'rinkeby';
+			break;
+		case '0xbf7e331f7f7c1dd2e05159666b3bf8bc7a8a3a9eb1d518969eab529dd9b88c1a':
+			network = 'görli';
+			break;
+		default:
+			network = `unknown (${general.genesis.substring(0, 8)})`;
+		}
 
 		return (
 			<Grid container className={this.props.classes.footer} direction='row' alignItems='center' style={styles.footer}>
@@ -202,6 +222,9 @@ class Footer extends Component<Props, State> {
 							</a>
 						</Typography>
 					)}
+					<Typography style={styles.headerText}>
+						<span style={commonStyles.light}>Network</span> {network}
+					</Typography>
 				</Grid>
 			</Grid>
 		);

dashboard/assets/components/Header.jsx

@@ -23,16 +23,25 @@ import AppBar from '@material-ui/core/AppBar';
 import Toolbar from '@material-ui/core/Toolbar';
 import IconButton from '@material-ui/core/IconButton';
 import {FontAwesomeIcon} from '@fortawesome/react-fontawesome';
-import {faBars} from '@fortawesome/free-solid-svg-icons';
+import {faBars, faSortAmountUp, faClock, faUsers, faSync} from '@fortawesome/free-solid-svg-icons';
 import Typography from '@material-ui/core/Typography';
+import type {Content} from '../types/content';
+
+
+const magnitude = [31536000, 604800, 86400, 3600, 60, 1];
+const label     = ['y', 'w', 'd', 'h', 'm', 's'];
 
 // styles contains the constant styles of the component.
 const styles = {
 	header: {
 		height: '8%',
 	},
+	headerText: {
+		marginRight: 15,
+	},
 	toolbar: {
-		height: '100%',
+		height:    '100%',
+		minHeight: 'unset',
 	},
 };
 
@@ -50,16 +59,52 @@ const themeStyles = (theme: Object) => ({
 	title: {
 		paddingLeft: theme.spacing.unit,
 		fontSize:    3 * theme.spacing.unit,
+		flex:        1,
 	},
 });
 
 export type Props = {
-	classes: Object, // injected by withStyles()
+	classes:       Object, // injected by withStyles()
 	switchSideBar: () => void,
+	content:       Content,
+	networkID:     number,
 };
 
+type State = {
+	since: string,
+}
 // Header renders the header of the dashboard.
-class Header extends Component<Props> {
+class Header extends Component<Props, State> {
+	constructor(props) {
+		super(props);
+		this.state = {since: ''};
+	}
+
+	componentDidMount() {
+		this.interval = setInterval(() => this.setState(() => {
+			// time (seconds) since last block.
+			let timeDiff = Math.floor((Date.now() - this.props.content.chain.currentBlock.timestamp * 1000) / 1000);
+			let since = '';
+			let i = 0;
+			for (; i < magnitude.length && timeDiff < magnitude[i]; i++);
+			for (let j = 2; i < magnitude.length && j > 0; j--, i++) {
+				const t = Math.floor(timeDiff / magnitude[i]);
+				if (t > 0) {
+					since += `${t}${label[i]} `;
+					timeDiff %= magnitude[i];
+				}
+			}
+			if (since === '') {
+				since = 'now';
+			}
+			this.setState({since: since});
+		}), 1000);
+	}
+
+	componentWillUnmount() {
+		clearInterval(this.interval);
+	}
+
 	render() {
 		const {classes} = this.props;
 
@@ -72,6 +117,15 @@ class Header extends Component<Props> {
 					<Typography type='title' color='inherit' noWrap className={classes.title}>
 						Go Ethereum Dashboard
 					</Typography>
+					<Typography style={styles.headerText}>
+						<FontAwesomeIcon icon={faSortAmountUp} /> {this.props.content.chain.currentBlock.number}
+					</Typography>
+					<Typography style={styles.headerText}>
+						<FontAwesomeIcon icon={faClock} /> {this.state.since}
+					</Typography>
+					<Typography style={styles.headerText}>
+						<FontAwesomeIcon icon={faUsers} /> {this.props.content.network.activePeerCount}
+					</Typography>
 				</Toolbar>
 			</AppBar>
 		);

dashboard/assets/components/Main.jsx

@@ -20,6 +20,7 @@ import React, {Component} from 'react';
 
 import withStyles from '@material-ui/core/styles/withStyles';
 
+import Chain from 'Chain';
 import Network from 'Network';
 import Logs from 'Logs';
 import Footer from 'Footer';
@@ -95,7 +96,9 @@ class Main extends Component<Props, State> {
 			children = <div>Work in progress.</div>;
 			break;
 		case MENU.get('chain').id:
-			children = <div>Work in progress.</div>;
+			children = <Chain
+				content={this.props.content.chain}
+			/>;
 			break;
 		case MENU.get('txpool').id:
 			children = <div>Work in progress.</div>;