1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
// @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 Header from './Header';
import Body from './Body';
import Footer from './Footer';
import {MENU} from './Common';
import type {Content} from '../types/content';
// deepUpdate updates an object corresponding to the given update data, which has
// the shape of the same structure as the original object. updater also has the same
// structure, except that it contains functions where the original data needs to be
// updated. These functions are used to handle the update.
//
// Since the messages have the same shape as the state content, this approach allows
// the generalization of the message handling. The only necessary thing is to set a
// handler function for every path of the state in order to maximize the flexibility
// of the update.
const deepUpdate = (prev: Object, update: Object, updater: Object) => {
if (typeof update === 'undefined') {
// TODO (kurkomisi): originally this was deep copy, investigate it.
return prev;
}
if (typeof updater === 'function') {
return updater(prev, update);
}
const updated = {};
Object.keys(prev).forEach((key) => {
updated[key] = deepUpdate(prev[key], update[key], updater[key]);
});
return updated;
};
// shouldUpdate returns the structure of a message. It is used to prevent unnecessary render
// method triggerings. In the affected component's shouldComponentUpdate method it can be checked
// whether the involved data was changed or not by checking the message structure.
//
// We could return the message itself too, but it's safer not to give access to it.
const shouldUpdate = (msg: Object, updater: Object) => {
const su = {};
Object.keys(msg).forEach((key) => {
su[key] = typeof updater[key] !== 'function' ? shouldUpdate(msg[key], updater[key]) : true;
});
return su;
};
// appender is a state update generalization function, which appends the update data
// to the existing data. limit defines the maximum allowed size of the created array.
const appender = <T>(limit: number) => (prev: Array<T>, update: Array<T>) => [...prev, ...update].slice(-limit);
// replacer is a state update generalization function, which replaces the original data.
const replacer = <T>(prev: T, update: T) => update;
// defaultContent is the initial value of the state content.
const defaultContent: Content = {
general: {
version: null,
commit: null,
},
home: {
memory: [],
traffic: [],
},
chain: {},
txpool: {},
network: {},
system: {},
logs: {
log: [],
},
};
// updaters contains the state update generalization functions for each path of the state.
// TODO (kurkomisi): Define a tricky type which embraces the content and the handlers.
const updaters = {
general: {
version: replacer,
commit: replacer,
},
home: {
memory: appender(200),
traffic: appender(200),
},
chain: null,
txpool: null,
network: null,
system: null,
logs: {
log: appender(200),
},
};
// styles returns the styles for the Dashboard component.
const styles = theme => ({
dashboard: {
display: 'flex',
flexFlow: 'column',
width: '100%',
height: '100%',
background: theme.palette.background.default,
zIndex: 1,
overflow: 'hidden',
},
});
export type Props = {
classes: Object,
};
type State = {
active: string, // active menu
sideBar: boolean, // true if the sidebar is opened
content: Content, // the visualized data
shouldUpdate: Object // labels for the components, which need to rerender based on the incoming message
};
// Dashboard is the main component, which renders the whole page, makes connection with the server and
// listens for messages. When there is an incoming message, updates the page's content correspondingly.
class Dashboard extends Component<Props, State> {
constructor(props: Props) {
super(props);
this.state = {
active: MENU.get('home').id,
sideBar: true,
content: defaultContent,
shouldUpdate: {},
};
}
// componentDidMount initiates the establishment of the first websocket connection after the component is rendered.
componentDidMount() {
this.reconnect();
}
// reconnect establishes a websocket connection with the server, listens for incoming messages
// and tries to reconnect on connection loss.
reconnect = () => {
const server = new WebSocket(`${((window.location.protocol === 'https:') ? 'wss://' : 'ws://') + window.location.host}/api`);
server.onopen = () => {
this.setState({content: defaultContent, shouldUpdate: {}});
};
server.onmessage = (event) => {
const msg: $Shape<Content> = JSON.parse(event.data);
if (!msg) {
console.error(`Incoming message is ${msg}`);
return;
}
this.update(msg);
};
server.onclose = () => {
setTimeout(this.reconnect, 3000);
};
};
// update updates the content corresponding to the incoming message.
update = (msg: $Shape<Content>) => {
this.setState(prevState => ({
content: deepUpdate(prevState.content, msg, updaters),
shouldUpdate: shouldUpdate(msg, updaters),
}));
};
// changeContent sets the active label, which is used at the content rendering.
changeContent = (newActive: string) => {
this.setState(prevState => (prevState.active !== newActive ? {active: newActive} : {}));
};
// openSideBar opens the sidebar.
openSideBar = () => {
this.setState({sideBar: true});
};
// closeSideBar closes the sidebar.
closeSideBar = () => {
this.setState({sideBar: false});
};
render() {
const {classes} = this.props; // The classes property is injected by withStyles().
return (
<div className={classes.dashboard}>
<Header
opened={this.state.sideBar}
openSideBar={this.openSideBar}
closeSideBar={this.closeSideBar}
/>
<Body
opened={this.state.sideBar}
changeContent={this.changeContent}
active={this.state.active}
content={this.state.content}
shouldUpdate={this.state.shouldUpdate}
/>
<Footer
opened={this.state.sideBar}
openSideBar={this.openSideBar}
closeSideBar={this.closeSideBar}
general={this.state.content.general}
shouldUpdate={this.state.shouldUpdate}
/>
</div>
);
}
}
export default withStyles(styles)(Dashboard);
|