class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController ## # Dynamically build a handler for each omniauth provider # ------------------------------------------------------------- IdentifierScheme.where(active: true).each do |scheme| define_method(scheme.name.downcase) do handle_omniauth(scheme) end end ## # Processes callbacks from an omniauth provider and directs the user to # the appropriate page: # Not logged in and uid had no match ---> Sign Up page # Not logged in and uid had a match ---> Sign In and go to Home Page # Signed in and uid had no match --> Save the uid and go to the Profile Page # Signed in and uid had a match --> Go to the Home Page # # @scheme [IdentifierScheme] The IdentifierScheme for the provider # ------------------------------------------------------------- def handle_omniauth(scheme) user = User.from_omniauth(request.env["omniauth.auth"].nil? ? request.env : request.env["omniauth.auth"]) # If the user isn't logged in if current_user.nil? # If the uid didn't have a match in the system send them to register if user.nil? session["devise.#{scheme.name.downcase}_data"] = request.env["omniauth.auth"] flash[:notice] = t('identifier_schemes.new_login_success') redirect_to new_user_registration_url # Otherwise sign them in else sign_in_and_redirect user, event: :authentication set_flash_message(:notice, :success, kind: scheme.name) if is_navigational_format? end # The user is already logged in and just registering the uid with us else # If the user could not be found by that uid then attach it to their record if user.nil? if UserIdentifier.create(identifier_scheme: scheme, identifier: request.env["omniauth.auth"].uid, user: current_user) flash[:notice] = _("Your account has been successfully linked to %{scheme}.") % { scheme: scheme.description } else flash[:notice] = _("Unable to link your account to %{scheme}.") % { scheme: scheme.description } end end # Redirect to the User Profile page redirect_to edit_user_registration_path end end # ------------------------------------------------------------- def failure redirect_to root_path end end