78 lines
2.5 KiB
TypeScript
78 lines
2.5 KiB
TypeScript
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import { createContext, useEffect } from 'react'
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import { User } from 'common/user'
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import { onIdTokenChanged } from 'firebase/auth'
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import {
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auth,
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listenForUser,
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getUser,
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setCachedReferralInfoForUser,
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} from 'web/lib/firebase/users'
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import { deleteAuthCookies, setAuthCookies } from 'web/lib/firebase/auth'
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import { createUser } from 'web/lib/firebase/api'
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import { randomString } from 'common/util/random'
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import { identifyUser, setUserProperty } from 'web/lib/service/analytics'
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import { useStateCheckEquality } from 'web/hooks/use-state-check-equality'
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// Either we haven't looked up the logged in user yet (undefined), or we know
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// the user is not logged in (null), or we know the user is logged in (User).
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type AuthUser = undefined | null | User
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const CACHED_USER_KEY = 'CACHED_USER_KEY'
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const ensureDeviceToken = () => {
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let deviceToken = localStorage.getItem('device-token')
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if (!deviceToken) {
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deviceToken = randomString()
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localStorage.setItem('device-token', deviceToken)
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}
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return deviceToken
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}
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export const AuthContext = createContext<AuthUser>(null)
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export function AuthProvider({ children }: any) {
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const [authUser, setAuthUser] = useStateCheckEquality<AuthUser>(undefined)
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useEffect(() => {
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const cachedUser = localStorage.getItem(CACHED_USER_KEY)
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setAuthUser(cachedUser && JSON.parse(cachedUser))
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}, [setAuthUser])
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useEffect(() => {
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return onIdTokenChanged(auth, async (fbUser) => {
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if (fbUser) {
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let user = await getUser(fbUser.uid)
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if (!user) {
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const deviceToken = ensureDeviceToken()
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user = (await createUser({ deviceToken })) as User
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}
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setAuthUser(user)
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// Persist to local storage, to reduce login blink next time.
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// Note: Cap on localStorage size is ~5mb
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localStorage.setItem(CACHED_USER_KEY, JSON.stringify(user))
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setCachedReferralInfoForUser(user)
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setAuthCookies(await fbUser.getIdToken(), fbUser.refreshToken)
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} else {
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// User logged out; reset to null
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setAuthUser(null)
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localStorage.removeItem(CACHED_USER_KEY)
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deleteAuthCookies()
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}
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})
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}, [setAuthUser])
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const authUserId = authUser?.id
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const authUsername = authUser?.username
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useEffect(() => {
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if (authUserId && authUsername) {
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identifyUser(authUserId)
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setUserProperty('username', authUsername)
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return listenForUser(authUserId, setAuthUser)
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}
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}, [authUserId, authUsername, setAuthUser])
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return (
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<AuthContext.Provider value={authUser}>{children}</AuthContext.Provider>
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)
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}
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