Newer
Older
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
// This file is part of Parity.
//
// SPDX-License-Identifier: BSD-3-Clause
import React from 'react';
import QrSigner from '@parity/qr-signer';
Luke Schoen
committed
import { ExternalLink } from 'fether-ui';
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
import loading from '../assets/img/icons/loading.svg';
export default class Scanner extends React.PureComponent {
state = {
webcamError: null,
isLoading: true
};
componentDidMount () {
this.checkForWebcam();
if (navigator.mediaDevices) {
navigator.mediaDevices.addEventListener(
'devicechange',
this.checkForWebcam
);
}
}
componentWillUnmount () {
if (navigator.mediaDevices && navigator.mediaDevices.ondevicechange) {
navigator.mediaDevices.removeEventListener(
'devicechange',
this.checkForWebcam
);
}
}
checkForWebcam = async () => {
if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
try {
await navigator.mediaDevices.getUserMedia({ video: true });
this.setState({
webcamError: null,
isLoading: false
});
} catch (e) {
let errorMessage;
switch (e.name) {
case 'NotAllowedError':
case 'SecurityError':
Luke Schoen
committed
errorMessage = 'Webcam access was refused.';
break;
case 'NotFoundError':
case 'OverconstrainedError':
Luke Schoen
committed
errorMessage = 'Webcam not found on the device.';
Luke Schoen
committed
errorMessage = 'Webcam permissions or hardware error.';
Luke Schoen
committed
errorMessage = 'Webcam unknown error.';
}
this.setState({
webcamError: errorMessage,
isLoading: false
});
}
}
};
render () {
const { onScan, label } = this.props;
const { webcamError, isLoading } = this.state;
const size = 300;
return (
{isLoading ? (
<img alt='loading' src={loading} />
) : webcamError ? (
Luke Schoen
committed
<div>
<p>
{webcamError} Visit the
<ExternalLink
name='Fether FAQ'
href='https://wiki.parity.io/Fether-FAQ#how-to-fix-a-webcam-error'
/>
for help troubleshooting this issue.
</p>
</div>
) : (
<div>
<p>{label}</p>
<QrSigner scan onScan={onScan} size={size} />
</div>
)}