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Contents
# :namespace
module Credentials
# Associates a Facebook account and OAuth2 token with an account.
class Facebook < ::Credential
# The Graph API object ID of the Facebook account.
alias_attribute :facebook_uid, :name
validates :name, :format => /^\d+$/, :presence => true,
:uniqueness => { :scope => [:type],
:message => 'Your Facebook user is already associated to an account' }
# A user can be associated to a single Facebook account.
validates :user_id, :uniqueness => {
:message => 'Your account is already associated to a Facebook user' }
# OAuth2 token issued by Facebook.
alias_attribute :access_token, :key
validates :key, :presence => true
# FBGraph client loaded with this access token.
def facebook_client
@client ||= FBGraphRails.fbclient(access_token)
end
# Finds or creates the model containing a token.
#
# If a model for the same user exists, the model is updated with the given
# token. Otherwise, a new model will be created, together with a user.
def self.for(access_token)
uid = uid_from_token access_token
credential = self.where(:name => uid.to_str).first
if credential
credential.key = access_token
credential.save!
else
User.transaction do
user = User.create!
credential = self.new
user.credentials << credential
credential.facebook_uid = uid
credential.access_token = access_token
credential.save!
end
end
credential
end
# Extracts the Facebook user ID from a OAuth2 token.
#
# This used to be a hack that pulled the UID out of an OAuth2 token. The new
# encrypted OAuth2 tokens don't have UIDs anymore, so this method is an
# interim hack for old code that still depends on it.
def self.uid_from_token(access_token)
FBGraphRails.fbclient(access_token).selection.me.info![:id].to_s
end
# Forms should not be able to touch any attribute.
attr_accessible
end # class Credentials::Facebook
end # namespace Credentials
Version data entries
12 entries across 12 versions & 1 rubygems