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import React, {useEffect, useState} from 'react'
import {ActivityIndicator, Platform, View} from 'react-native'
import ReactNativeDeviceAttest from 'react-native-device-attest'
import {msg} from '@lingui/macro'
import {useLingui} from '@lingui/react'
import {nanoid} from 'nanoid/non-secure'
import {createFullHandle} from '#/lib/strings/handles'
import {logger} from '#/logger'
import {isAndroid, isIOS, isNative, isWeb} from '#/platform/detection'
import {ScreenTransition} from '#/screens/Login/ScreenTransition'
import {useSignupContext} from '#/screens/Signup/state'
import {CaptchaWebView} from '#/screens/Signup/StepCaptcha/CaptchaWebView'
import {atoms as a, useTheme} from '#/alf'
import {FormError} from '#/components/forms/FormError'
import {GCP_PROJECT_ID} from '#/env'
import {BackNextButtons} from '../BackNextButtons'
const CAPTCHA_PATH =
isWeb || GCP_PROJECT_ID === 0 ? '/gate/signup' : '/gate/signup/attempt-attest'
export function StepCaptcha() {
if (isWeb) {
return <StepCaptchaInner />
} else {
return <StepCaptchaNative />
}
}
export function StepCaptchaNative() {
const [token, setToken] = useState<string>()
const [payload, setPayload] = useState<string>()
const [ready, setReady] = useState(false)
useEffect(() => {
;(async () => {
logger.debug('trying to generate attestation token...')
try {
if (isIOS) {
logger.debug('starting to generate devicecheck token...')
const token = await ReactNativeDeviceAttest.getDeviceCheckToken()
setToken(token)
logger.debug(`generated devicecheck token: ${token}`)
} else {
const {token, payload} =
await ReactNativeDeviceAttest.getIntegrityToken('signup')
setToken(token)
setPayload(base64UrlEncode(payload))
}
} catch (e: any) {
logger.error(e)
} finally {
setReady(true)
}
})()
}, [])
if (!ready) {
return <View />
}
return <StepCaptchaInner token={token} payload={payload} />
}
function StepCaptchaInner({
token,
payload,
}: {
token?: string
payload?: string
}) {
const {_} = useLingui()
const theme = useTheme()
const {state, dispatch} = useSignupContext()
const [completed, setCompleted] = React.useState(false)
const stateParam = React.useMemo(() => nanoid(15), [])
const url = React.useMemo(() => {
const newUrl = new URL(state.serviceUrl)
newUrl.pathname = CAPTCHA_PATH
newUrl.searchParams.set(
'handle',
createFullHandle(state.handle, state.userDomain),
)
newUrl.searchParams.set('state', stateParam)
newUrl.searchParams.set('colorScheme', theme.name)
if (isNative && token) {
newUrl.searchParams.set('platform', Platform.OS)
newUrl.searchParams.set('token', token)
if (isAndroid && payload) {
newUrl.searchParams.set('payload', payload)
}
}
return newUrl.href
}, [
state.serviceUrl,
state.handle,
state.userDomain,
stateParam,
theme.name,
token,
payload,
])
const onSuccess = React.useCallback(
(code: string) => {
setCompleted(true)
logger.metric('signup:captchaSuccess', {}, {statsig: true})
dispatch({
type: 'submit',
task: {verificationCode: code, mutableProcessed: false},
})
},
[dispatch],
)
const onError = React.useCallback(
(error?: unknown) => {
dispatch({
type: 'setError',
value: _(msg`Error receiving captcha response.`),
})
logger.metric('signup:captchaFailure', {}, {statsig: true})
logger.error('Signup Flow Error', {
registrationHandle: state.handle,
error,
})
},
[_, dispatch, state.handle],
)
const onBackPress = React.useCallback(() => {
logger.error('Signup Flow Error', {
errorMessage:
'User went back from captcha step. Possibly encountered an error.',
registrationHandle: state.handle,
})
dispatch({type: 'prev'})
}, [dispatch, state.handle])
return (
<ScreenTransition>
<View style={[a.gap_lg]}>
<View
style={[
a.w_full,
a.overflow_hidden,
{minHeight: 510},
completed && [a.align_center, a.justify_center],
]}>
{!completed ? (
<CaptchaWebView
url={url}
stateParam={stateParam}
state={state}
onSuccess={onSuccess}
onError={onError}
/>
) : (
<ActivityIndicator size="large" />
)}
</View>
<FormError error={state.error} />
</View>
<BackNextButtons
hideNext
isLoading={state.isLoading}
onBackPress={onBackPress}
/>
</ScreenTransition>
)
}
function base64UrlEncode(data: string): string {
const encoder = new TextEncoder()
const bytes = encoder.encode(data)
const binaryString = String.fromCharCode(...bytes)
const base64 = btoa(binaryString)
return base64.replace(/\+/g, '-').replace(/\//g, '_').replace(/[=]/g, '')
}
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