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import React, { Component } from 'react'
import PropTypes from 'prop-types'
import {connect} from 'react-redux'
import { hideQrScanner, qrCodeDetected} from '../../actions'
import Spinner from '../spinner'
import { BrowserQRCodeReader } from '@zxing/library'
class QrScanner extends Component {
static propTypes = {
visible: PropTypes.bool,
hideQrScanner: PropTypes.func,
qrCodeDetected: PropTypes.func,
}
constructor (props) {
super(props)
this.state = {
ready: false,
msg: 'Accesing your camera...',
}
this.scanning = false
this.codeReader = null
}
componentDidUpdate () {
if (this.props.visible && this.camera && !this.scanning) {
this.scanning = true
this.initCamera()
}
}
initCamera () {
console.log('QR-SCANNER: initCamera ')
this.codeReader = new BrowserQRCodeReader()
this.codeReader.getVideoInputDevices()
.then(videoInputDevices => {
console.log('QR-SCANNER: getVideoInputDevices ', videoInputDevices)
setTimeout(_ => {
this.setState({
ready: true,
msg: 'Place the QR code in front of your camera so we can read it...'})
console.log('QR-SCANNER: this.state.ready = true')
}, 2000)
console.log('QR-SCANNER: started scanning...')
this.codeReader.decodeFromInputVideoDevice(videoInputDevices[0].deviceId, 'video')
.then(content => {
console.log('QR-SCANNER: content found!', content)
this.codeReader.reset()
console.log('QR-SCANNER: stopped scanning...')
const result = this.parseContent(content.text)
if (result.type !== 'unknown') {
console.log('QR-SCANNER: CODE DETECTED', result)
this.props.qrCodeDetected(result)
this.props.hideQrScanner()
this.setState({ ready: false })
} else {
this.setState({msg: 'Error: We couldn\'t identify that QR code'})
console.log('QR-SCANNER: Unknown code')
}
})
.catch(err => {
console.log('QR-SCANNER: decodeFromInputVideoDevice threw an exception: ', err)
})
}).catch(err => {
console.log('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 = () => {
console.log('QR-SCANNER: stopping scanner...')
this.codeReader.reset()
this.scanning = false
this.props.hideQrScanner()
this.setState({ ready: false })
}
render () {
const { visible } = this.props
if (!visible) {
return null
}
return (
<div className={'qr-code-modal-wrapper'}>
<div className={'qr-scanner'}
style={{
position: 'fixed',
top: '50%',
left: '50%',
zIndex: 1050,
minWidth: '320px',
minHeight: '400px',
maxWidth: '300px',
maxHeight: '300px',
transform: 'translate(-50%, -50%)',
backgroundColor: '#ffffff',
padding: '15px',
}}
>
<h3 style={{
textAlign: 'center',
marginBottom: '20px',
fontSize: '1.5rem',
fontWeight: '500',
}}>
Scan QR code
</h3>
<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)',
}}
ref={(cam) => {
this.camera = cam
}}
/>
{ !this.state.ready ? <Spinner color={'#F7C06C'} /> : null}
</div>
<div className={'qr-code-help'} style={{textAlign: 'center', fontSize: '12px', padding: '15px'}}>
{this.state.msg}
</div>
</div>
<div
className={'qr-code-modal-overlay'}
style={{
position: 'fixed',
top: '0',
right: '0',
bottom: '0',
left: '0',
zIndex: '1040',
backgroundColor: 'rgba(0, 0, 0, 0.5)',
animationFillMode: 'forwards',
animationDuration: '0.3s',
animationName: 'anim_171532470906313',
animationTimingFunction: 'ease-out',
}}
onClick={this.stopAndClose}
/>
</div>
)
}
}
function mapDispatchToProps (dispatch) {
return {
hideQrScanner: () => dispatch(hideQrScanner()),
qrCodeDetected: (data) => dispatch(qrCodeDetected(data)),
}
}
function mapStateToProps (state) {
return {}
}
export default connect(mapStateToProps, mapDispatchToProps)(QrScanner)
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