Accounts.createUser without username, password and email - facebook

Question

My application is built with React, which is completely separate from Meteor. I use Asteroid to interface to Meteor which serves as backend only. I have manually created the Facebook login button at front end and want to pass the data fetched from Facebook to Accounts.createUser. This method asks for two parameters which is not available because I have formatted it like so:
const data = {
services: {
facebook: fb
},
profile: {
first_name: fb.first_name,
last_name: fb.last_name,
}
}
I have created a method as below but I failed to log the user in with appropriate token or what ever indicator that Meteor needed:
getLoginByExternalService(options) {
if (Meteor.userId()) throw new Meteor.Error('400',`Please logout ${Meteor.userId()}`);
const email = options.services.facebook.email
const facebookId = options.services.facebook.id
const user = {services: {}}
user.services = options.services
const users = Meteor.users.find({"services.facebook.id": facebookId}).fetch();
if (!users.length) {
const userId = Accounts.insertUserDoc(options, user)
if (Meteor.isServer)
this.setUserId(userId)
else
Meteor.setUserId(userId)
return userId
} else {
if (Meteor.isServer)
this.setUserId(users[0]._id)
if (Meteor.isClient)
Meteor.setUserId(userId)
return {users, userId: Meteor.userId()}
}
}
How to properly log the user in?

Answer 1

Okay I already got the answer. I don't have to format the data return from facebook response. So here the implementation at the backend
getLoginByExternalService(resp) {
if (Meteor.userId()) Meteor.logout(Meteor.userId()) //who knows?
const accessToken = resp.accessToken
const identity = getIdentity(accessToken)
const profilePicture = getProfilePicture(accessToken)
const serviceData = {
accessToken: accessToken,
expiresAt: (+new Date) + (1000 * resp.expiresIn)
}
const whitelisted = ['id', 'email', 'name', 'first_name', 'last_name', 'link', 'username', 'gender', 'locale', 'age_range']
const fields = _.pick(identity, whitelisted)
const options = {profile: {}}
const profileFields = _.pick(identity, getProfileFields())
//creating the token and adding to the user
const stampedToken = Accounts._generateStampedLoginToken()
//hashing is something added with Meteor 0.7.x,
//you don't need to do hashing in previous versions
const hashStampedToken = Accounts._hashStampedToken(stampedToken)
let ref = null
_.extend(serviceData, fields)
_.extend(options.profile, profileFields)
options.profile.avatar = profilePicture
try {
ref = Accounts.updateOrCreateUserFromExternalService("facebook", serviceData, options);
} catch (e) {
if (e.reason === "Email already exists.") {
const existingUser = Meteor.users.findOne({ 'emails.address': identity.email })
if ( existingUser ) {
if ( identity.verified ) {
Meteor.users.update({ _id: existingUser._id }, { $set: { 'services.facebook': serviceData }})
ref = { userId: existingUser._id }
console.log(`Merged facebook identity with existing local user ${existingUser._id}`);
} else {
throw Meteor.Error(403, "Refusing to merge unverified facebook identity with existing user")
}
}
} else {
throw Meteor.Error(e.error, e.reason)
}
}
Meteor.users.update(ref.userId, {$push: {'services.resume.loginTokens': hashStampedToken}})
return {id: ref.userId, token: stampedToken.token}
}
so somewhere at the front end
asteroid.call("getLoginByExternalService", data).then(response => response)