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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 Instascan from 'instascan'
class QrScanner extends Component {
static propTypes = {
visible: PropTypes.bool,
hideQrScanner: PropTypes.func,
qrCodeDetected: PropTypes.func,
}
constructor (props) {
super(props)
this.state = {
msg: 'Place the QR code in front of your camera so we can read it...',
}
this.scanning = false
}
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}
}
componentDidUpdate () {
if (this.props.visible && this.camera && !this.scanning) {
const scanner = new Instascan.Scanner({
video: this.camera,
backgroundScan: false,
continuous: true,
})
scanner.addListener('scan', (content) => {
scanner.stop().then(_ => {
const result = this.parseContent(content)
if (result.type !== 'unknown') {
console.log('QR-SCANNER: CODE DETECTED', result)
this.props.qrCodeDetected(result)
this.props.hideQrScanner()
} else {
this.setState({msg: 'Error: We couldn\'t identify that QR code'})
}
})
})
Instascan.Camera.getCameras().then((cameras) => {
if (cameras.length > 0) {
scanner.start(cameras[0])
console.log('QR-SCANNER: started scanning with camera', cameras[0])
} else {
console.log('QR-SCANNER: no cameras found')
}
}).catch(function (e) {
console.error(e)
})
this.scanning = true
}
}
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',
}}>
Scan QR code
</h3>
<div
className={'qr-code-video-wrapper'}
style={{
overflow: 'hidden',
width: '100%',
height: '275px',
}}>
<video
style={{
width: 'auto',
height: '275px',
marginLeft: '-15%',
}}
ref={(cam) => {
this.camera = cam
}}
/>
</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.props.hideQrScanner() }
/>
</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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