Twitter logout / account switch

[raphaelyancey]

As it seems impossible to destroy the session & cache via the OAuth.io API to implement a logout function, I implemented a Switch Account button in my application that calls for .popup('twitter') with force_login: true as specified in the Twitter API docs.

This forces the user to log in again, and therefore I can overwrite the api object returned by the .popup() method when successful. But when using this new API, it posts as the previous account (before switching), even if the tokens are different.

Interesting bits of code (Angular service)

Service.login = function(force) {

    var q = $q.defer();

    OAuth.popup('twitter', { cache: !force, authorize: { force_login: !!force }})
    .done(function(api) {
        Service.api = api;
        Service.api.get('1.1/account/verify_credentials.json')
        .done(function(user) {
            Service.user = user;
            q.resolve(user);
        })
        .fail(function(err) {
            Service.user = null;
            q.reject({ message: 'CANNOT_GET_USER_INFO', error: err });
        })
    })
    .fail(function(err) { q.reject({ message: 'LOGIN_FAILED', error: err }) });

    return q.promise;
}

Service.post = function(post, pictures) {

    var q = $q.defer();

    Service.login()
    .then(function(user) {
        Service.api.post('1.1/statuses/update.json', { data: { status: post } })
        .done(function(posted) { q.resolve(posted) })
        .fail(function(err) { q.reject({ message: 'POST_FAILED', error: err }) });
    })
    .catch(function(err) { q.reject(err) });

    return q.promise;
}

In my controller (stripped down but you get the idea)
<button ng-click="login(true)">Switch account</button>

[raphaelyancey]

Okay, that's how I implemented it : it deletes related localStorage items. This method is called in the Service.login(true) method where I added if(!!force) Service.logout().

Service.logout = function() {
    var keys = ['oauthio_cache', 'oauthio_provider_twitter'];
    _.each(keys, function(key) { localStorage.removeItem(key) });
    return _.reduce(keys, function(memo, key) { return !!localStorage.getItem(key) && memo }, false);
}