lib/api/openid_connect/protected_resource_endpoint.rb
# frozen_string_literal: true

# Copyright (c) 2011 nov matake
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
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# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

# See https://github.com/nov/openid_connect_sample/blob/master/lib/authentication.rb#L56

module Api
  module OpenidConnect
    module ProtectedResourceEndpoint
      attr_reader :current_token

      def require_access_token(required_scopes)
        raise Rack::OAuth2::Server::Resource::Bearer::Forbidden.new(:insufficient_scope) unless
          access_token?(required_scopes)
      end

      def access_token?(required_scopes)
        @current_token = request.env[Rack::OAuth2::Server::Resource::ACCESS_TOKEN]
        raise Rack::OAuth2::Server::Resource::Bearer::Unauthorized.new("Unauthorized user") unless
          @current_token && @current_token.authorization
        @current_token.authorization.try(:accessible?, required_scopes)
      end
    end
  end
end
