Question

I am trying to use everyauth within express to authenticate users to a website that allows adding text commentary to images. I am currently using the twitter oauth api to authenticate my users.

Now I’m trying to established a custom user database that allows me to keep multiple ways of logging in connected to a single entry in a CouchDB. I am running into trouble when i want to add a new user to the DB when he initially connects via twitter. The code of my findUserById reads as following:

everyauth.everymodule.findUserById (userId, callback) ->  
    users.findById userId, (err,res) ->
        if res.id    
        # id returned, so there is an entry in the DB
            callback null, res
        else         
        # no entry in the DB, add a new one
            users.saveById JSON.stringify(userId), {"name":"test"}, (saveErr, saveRes) ->
                callback null, saveRes

everyauth.twitter
    .consumerKey(config.twitterConsumerKey)
    .consumerSecret(config.twitterConsumerSecret)
    .findOrCreateUser((session, token, secret, user) ->
         promise = @.Promise().fulfill user
    ).redirectPath '/'

findById and saveById are methods of a cradle object that query the DB, userId is provided by everyauth, as it seems.

My problem lies in the {"name":"test"} part. This is the location where I want to add the data from the req.session.auth.twitter object to the DB. How can I access those values from within the findUserByIdfunction?

Is that even possible? Is there a different approach? I am looking at the findOrCreateUser function, but I have no idea how to change that without crashing my app – i do not yet grasp the concept of the Promise.

Answer 1

After fiddling around further, I have found a solution to the problem i posed. To access the full user data that is transmitted with the OAuth request with respect to the Promise-structure of everyauth, the everyauth.twitter call should look like this:

everyauth.twitter
 .consumerKey(config.twitterConsumerKey)
 .consumerSecret(config.twitterConsumerSecret)
 .findOrCreateUser((session, token, secret, user) ->
   users.findByTwitterId user.id, (err,res) ->
     if res.id
       user=res.value
     else
       newUser = {id:user.id,name:user.name,twitter:user}
       user = newUser
       users.saveById JSON.stringify(user.id), user, (saveErr, saveRes) -> 
   promise = @.Promise().fulfill user
 ).redirectPath '/'

The findByTwitterId call is a function that queries the CouchDB for a view looking up documents that contain a twitter.id field.

The req.user object is populated by this:

everyauth.everymodule.findUserById (userId, callback) ->  
 users.findByTwitterId userId, (err,res) ->
    if res.id
        callback null, res.value
    else
        callback null, null