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metamask-extension/ui/lib/webcam-utils.js
2020-02-15 17:04:21 -03:30

37 lines
1.2 KiB
JavaScript

'use strict'
import { ENVIRONMENT_TYPE_POPUP, PLATFORM_BRAVE, PLATFORM_FIREFOX } from '../../app/scripts/lib/enums'
import { getEnvironmentType, getPlatform } from '../../app/scripts/lib/util'
class WebcamUtils {
static async checkStatus () {
const isPopup = getEnvironmentType() === ENVIRONMENT_TYPE_POPUP
const isFirefoxOrBrave = getPlatform() === (PLATFORM_FIREFOX || PLATFORM_BRAVE)
const devices = await window.navigator.mediaDevices.enumerateDevices()
const webcams = devices.filter((device) => device.kind === 'videoinput')
const hasWebcam = webcams.length > 0
// A non-empty-string label implies that the webcam has been granted permission, as
// otherwise the label is kept blank to prevent fingerprinting
const hasWebcamPermissions = webcams.some((webcam) => webcam.label && webcam.label.length > 0)
if (hasWebcam) {
let environmentReady = true
if ((isFirefoxOrBrave && isPopup) || (isPopup && !hasWebcamPermissions)) {
environmentReady = false
}
return {
permissions: hasWebcamPermissions,
environmentReady,
}
} else {
const error = new Error('No webcam found')
error.type = 'NO_WEBCAM_FOUND'
throw error
}
}
}
export default WebcamUtils