class Devise::OmniauthCallbacksController

def after_omniauth_failure_path_for(scope)
  new_session_path(scope)
end

def failed_strategy
  request.respond_to?(:get_header) ? request.get_header("omniauth.error.strategy") : request.env["omniauth.error.strategy"]
end

def failure
  set_flash_message! :alert, :failure, kind: OmniAuth::Utils.camelize(failed_strategy.name), reason: failure_message
  redirect_to after_omniauth_failure_path_for(resource_name)
end

def failure_message
  exception = request.respond_to?(:get_header) ? request.get_header("omniauth.error") : request.env["omniauth.error"]
  error   = exception.error_reason if exception.respond_to?(:error_reason)
  error ||= exception.error        if exception.respond_to?(:error)
  error ||= (request.respond_to?(:get_header) ? request.get_header("omniauth.error.type") : request.env["omniauth.error.type"]).to_s
  error.to_s.humanize if error
end

def passthru
  render status: 404, plain: "Not found. Authentication passthru."
end

def translation_scope
  'devise.omniauth_callbacks'
end