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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'
import WebcamUtils from '../../../../lib/webcam-utils'
export default class QrScanner extends Component {
static propTypes = {
hideModal: PropTypes.func.isRequired,
qrCodeDetected: PropTypes.func,
error: PropTypes.bool,
errorType: PropTypes.string,
}
static contextTypes = {
t: PropTypes.func,
}
constructor (props, context) {
super(props)
let initialMsg = context.t('accessingYourCamera')
if (props.error) {
if (props.errorType === 'NO_WEBCAM_FOUND') {
initialMsg = context.t('noWebcamFound')
} else {
initialMsg = context.t('unknownCameraError')
}
}
this.state = {
ready: false,
msg: initialMsg,
}
this.codeReader = null
this.permissionChecker = null
this.needsToReinit = false
}
componentDidMount () {
this.initCamera()
}
async checkPermisisions () {
const { permissions } = await WebcamUtils.checkStatus()
if (permissions) {
clearTimeout(this.permissionChecker)
// Let the video stream load first...
setTimeout(_ => {
this.setState({
ready: true,
msg: this.context.t('scanInstructions'),
})
if (this.needsToReinit) {
this.initCamera()
this.needsToReinit = false
}
}, 2000)
} else {
// Keep checking for permissions
this.permissionChecker = setTimeout(_ => {
this.checkPermisisions()
}, 1000)
}
}
componentWillUnmount () {
clearTimeout(this.permissionChecker)
if (this.codeReader) {
this.codeReader.reset()
}
}
initCamera () {
this.codeReader = new BrowserQRCodeReader()
this.codeReader.getVideoInputDevices()
.then(videoInputDevices => {
clearTimeout(this.permissionChecker)
this.checkPermisisions()
this.codeReader.decodeFromInputVideoDevice(undefined, 'video')
.then(content => {
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 => {
if (err && err.name === 'NotAllowedError') {
this.setState({msg: this.context.t('youNeedToAllowCameraAccess')})
clearTimeout(this.permissionChecker)
this.needsToReinit = true
this.checkPermisisions()
}
})
}).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 type of links
// For ex. EIP-681 (https://eips.ethereum.org/EIPS/eip-681)
if (content.split('ethereum:').length > 1) {
type = 'address'
values = {'address': content.split('ethereum:')[1] }
}
return {type, values}
}
stopAndClose = () => {
this.codeReader.reset()
this.setState({ ready: false })
this.props.hideModal()
}
renderVideo () {
return (
<div className={'qr-scanner__content__video-wrapper'}>
<video
id="video"
style={{
display: this.state.ready ? 'block' : 'none',
}}
/>
{ !this.state.ready ? <Spinner color={'#F7C06C'} /> : null}
</div>
)
}
render () {
const { t } = this.context
return (
<div className="qr-scanner">
<div className="qr-scanner__title">
{ `${t('scanQrCode')}` }
</div>
<div className="qr-scanner__content">
{ !this.props.error ? this.renderVideo() : null}
</div>
<div className={`qr-scanner__status ${this.props.error ? 'error' : ''}`}>
{this.state.msg}
</div>
</div>
)
}
}
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