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import React, { Component } from 'react'
import PropTypes from 'prop-types'
import { BrowserQRCodeReader } from '@zxing/library'
import adapter from 'webrtc-adapter' // eslint-disable-line import/no-nodejs-modules, no-unused-vars
import Spinner from '../../spinner'
export default class QrScanner extends Component {
static propTypes = {
hideModal: PropTypes.func.isRequired,
qrCodeDetected: PropTypes.func,
}
static contextTypes = {
t: PropTypes.func,
}
constructor (props, context) {
super(props)
this.state = {
ready: false,
msg: context.t('accessingYourCamera'),
}
this.scanning = false
this.codeReader = null
}
componentDidMount () {
console.log('[QR-SCANNER]: componentDidUpdate', this.scanning)
if (!this.scanning) {
this.scanning = true
console.log('[QR-SCANNER]: componentDidUpdate - about to call initCamera')
this.initCamera()
}
}
initCamera () {
console.log('[QR-SCANNER]: initCamera')
this.codeReader = new BrowserQRCodeReader()
this.codeReader.getVideoInputDevices()
.then(videoInputDevices => {
console.log('[QR-SCANNER]: initCamera::getVideoInputDevices', videoInputDevices)
setTimeout(_ => {
this.setState({
ready: true,
msg: this.context.t('scanInstructions')})
console.log('[QR-SCANNER]: initCamera::ready')
}, 2000)
console.log('[QR-SCANNER]: initCamera::started decoding...')
this.codeReader.decodeFromInputVideoDevice(videoInputDevices[0].deviceId, 'video')
.then(content => {
console.log('[QR-SCANNER]: initCamera::decodeFromInputVideoDevice callback', content)
this.codeReader.reset()
const result = this.parseContent(content.text)
if (result.type !== 'unknown') {
this.props.qrCodeDetected(result)
this.stopAndClose()
} else {
this.setState({msg: this.context.t('unknownQrCode')})
}
})
.catch(err => {
console.error('QR-SCANNER: decodeFromInputVideoDevice threw an exception: ', err)
})
}).catch(err => {
console.error('QR-SCANNER: getVideoInputDevices threw an exception: ', err)
})
}
parseContent (content) {
let type = 'unknown'
let values = {}
// Here we could add more cases
// To parse other codes (transactions for ex.)
if (content.split('ethereum:').length > 1) {
type = 'address'
values = {'address': content.split('ethereum:')[1] }
}
return {type, values}
}
stopAndClose = () => {
this.codeReader.reset()
this.scanning = false
this.setState({ ready: false })
this.props.hideModal()
}
render () {
const { t } = this.context
return (
<div className="modal-container">
<div className="modal-container__content">
<div className="modal-container__title">
{ `${t('scanQrCode')}?` }
</div>
<div className="modal-container__description">
<div
className={'qr-code-video-wrapper'}
style={{
overflow: 'hidden',
width: '100%',
height: '275px',
display: 'flex',
alignItems: 'center',
justifyContent: 'center',
}
}>
<video
id="video"
style={{
width: 'auto',
height: '275px',
marginLeft: '-15%',
display: this.state.ready ? 'block' : 'none',
transform: 'scaleX(-1)',
}}
/>
{ !this.state.ready ? <Spinner color={'#F7C06C'} /> : null}
</div>
</div>
</div>
<div className="modal-container__footer">
{this.state.msg}
</div>
</div>
)
}
}
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