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import * as auth from '@adxp/auth'
import * as ucan from 'ucans'
import {
getInitialURL,
extractHashFragment,
clearHash,
} from '../../platform/urls'
import * as authFlow from '../../platform/auth-flow'
import * as storage from './storage'
const SCOPE = auth.writeCap(
'did:key:z6MkfRiFMLzCxxnw6VMrHK8pPFt4QAHS3jX3XM87y9rta6kP',
'did:example:microblog',
)
export async function isAuthed(authStore: ReactNativeStore) {
return await authStore.hasUcan(SCOPE)
}
export async function logout(authStore: ReactNativeStore) {
await authStore.reset()
}
export async function parseUrlForUcan(fragment: string) {
try {
return await auth.parseLobbyResponseHashFragment(fragment)
} catch (err) {
return undefined
}
}
export async function initialLoadUcanCheck(authStore: ReactNativeStore) {
let wasAuthed = false
const fragment = extractHashFragment(await getInitialURL())
if (fragment) {
const ucan = await parseUrlForUcan(fragment)
if (ucan) {
await authStore.addUcan(ucan)
wasAuthed = true
clearHash()
}
}
return wasAuthed
}
export async function requestAppUcan(authStore: ReactNativeStore) {
return authFlow.requestAppUcan(authStore, SCOPE)
}
export class ReactNativeStore extends auth.AuthStore {
private keypair: ucan.EdKeypair
private ucanStore: ucan.Store
constructor(keypair: ucan.EdKeypair, ucanStore: ucan.Store) {
super()
this.keypair = keypair
this.ucanStore = ucanStore
}
static async load(): Promise<ReactNativeStore> {
const keypair = await ReactNativeStore.loadOrCreateKeypair()
const storedUcans = await ReactNativeStore.getStoredUcanStrs()
const ucanStore = await ucan.Store.fromTokens(storedUcans)
return new ReactNativeStore(keypair, ucanStore)
}
static async loadOrCreateKeypair(): Promise<ucan.EdKeypair> {
const storedKey = await storage.loadString('adxKey')
if (storedKey) {
return ucan.EdKeypair.fromSecretKey(storedKey)
} else {
// @TODO: again just stand in since no actual root keys
const keypair = await ucan.EdKeypair.create({exportable: true})
storage.saveString('adxKey', await keypair.export())
return keypair
}
}
static async getStoredUcanStrs(): Promise<string[]> {
const storedStr = await storage.loadString('adxUcans')
if (!storedStr) {
return []
}
return storedStr.split(',')
}
static setStoredUcanStrs(ucans: string[]): void {
storage.saveString('adxUcans', ucans.join(','))
}
protected async getKeypair(): Promise<ucan.EdKeypair> {
return this.keypair
}
async addUcan(token: ucan.Chained): Promise<void> {
this.ucanStore.add(token)
const storedUcans = await ReactNativeStore.getStoredUcanStrs()
ReactNativeStore.setStoredUcanStrs([...storedUcans, token.encoded()])
}
async getUcanStore(): Promise<ucan.Store> {
return this.ucanStore
}
async clear(): Promise<void> {
storage.clear()
}
async reset(): Promise<void> {
this.clear()
this.keypair = await ReactNativeStore.loadOrCreateKeypair()
this.ucanStore = await ucan.Store.fromTokens([])
}
}
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