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mqtt-explorer/app/src/components/Sidebar/ValueRenderer/ValueRenderer.tsx
2019-04-02 19:30:21 +02:00

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import * as q from '../../../../../backend/src/Model'
import * as React from 'react'
import CodeDiff from '../../CodeDiff'
import { AppState } from '../../../reducers'
import { connect } from 'react-redux'
import { default as ReactResizeDetector } from 'react-resize-detector'
import { ValueRendererDisplayMode } from '../../../reducers/Settings'
interface Props {
message: q.Message
messageHistory: q.RingBuffer<q.Message>
compareWith?: q.Message
renderMode: ValueRendererDisplayMode
}
interface State {
width: number
}
class ValueRenderer extends React.Component<Props, State> {
constructor(props: Props) {
super(props)
this.state = { width: 0 }
}
public render() {
return (
<div style={{ padding: '8px 0px 8px 8px' }}>
<ReactResizeDetector handleWidth={true} onResize={this.updateWidth} />
{this.renderValue()}
</div>
)
}
public renderValue() {
const { message, messageHistory, compareWith, renderMode } = this.props
const previousMessages = messageHistory.toArray()
const previousMessage = previousMessages[previousMessages.length - 2]
let compareMessage = compareWith || previousMessage || message
if (renderMode === 'raw') {
compareMessage = message
}
let json
try {
json = JSON.parse(message.value)
} catch (error) {
return this.renderRawValue(message.value, compareMessage.value)
}
if (typeof json === 'string') {
return this.renderRawValue(message.value, compareMessage.value)
} else if (typeof json === 'number') {
return this.renderRawValue(message.value, compareMessage.value)
} else if (typeof json === 'boolean') {
return this.renderRawValue(message.value, compareMessage.value)
} else {
const current = this.messageToPrettyJson(message) || message.value
const compare = this.messageToPrettyJson(compareMessage) || compareMessage.value
const language = current && compare ? 'json' : undefined
return this.renderDiff(current, compare, language)
}
}
private renderDiff(current: string = '', previous: string = '', language?: 'json') {
return (
<CodeDiff
previous={previous}
current={current}
language={language}
nameOfCompareMessage={this.props.compareWith ? 'selected' : 'previous'}
/>
)
}
private messageToPrettyJson(message?: q.Message): string | undefined {
if (!message || !message.value) {
return undefined
}
try {
const json = JSON.parse(message.value)
return JSON.stringify(json, undefined, ' ')
} catch {
return undefined
}
}
private updateWidth = (width: number) => {
if (width !== this.state.width) {
this.setState({ width })
}
}
private renderRawValue(value: string, compare: string) {
return this.renderDiff(value, compare)
}
}
const mapStateToProps = (state: AppState) => {
return {
renderMode: state.settings.valueRendererDisplayMode,
}
}
export default connect(mapStateToProps)(ValueRenderer)