discourse/lib/auth/facebook_authenticator.rb

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class Auth::FacebookAuthenticator < Auth::Authenticator
def name
"facebook"
end
def after_authenticate(auth_token)
result = Auth::Result.new
session_info = parse_auth_token(auth_token)
facebook_hash = session_info[:facebook]
result.email = email = session_info[:email]
result.email_valid = !email.blank?
result.name = facebook_hash[:name]
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result.extra_data = facebook_hash
user_info = FacebookUserInfo.find_by(facebook_user_id: facebook_hash[:facebook_user_id])
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result.user = user_info.try(:user)
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if !result.user && !email.blank? && result.user = User.find_by_email(email)
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FacebookUserInfo.create({user_id: result.user.id}.merge(facebook_hash))
end
if email.blank?
UserHistory.create(
action: UserHistory.actions[:facebook_no_email],
details: "name: #{facebook_hash[:name]}, facebook_user_id: #{facebook_hash[:facebook_user_id]}"
)
end
result
end
def after_create_account(user, auth)
data = auth[:extra_data]
FacebookUserInfo.create({user_id: user.id}.merge(data))
end
def register_middleware(omniauth)
omniauth.provider :facebook,
:setup => lambda { |env|
strategy = env["omniauth.strategy"]
strategy.options[:client_id] = SiteSetting.facebook_app_id
strategy.options[:client_secret] = SiteSetting.facebook_app_secret
},
:scope => "email"
end
protected
def parse_auth_token(auth_token)
raw_info = auth_token["extra"]["raw_info"]
email = auth_token["info"][:email]
{
facebook: {
facebook_user_id: auth_token["uid"],
link: raw_info["link"],
username: raw_info["username"],
first_name: raw_info["first_name"],
last_name: raw_info["last_name"],
email: email,
gender: raw_info["gender"],
name: raw_info["name"]
},
email: email,
email_valid: true
}
end
end