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require 'grpc'

# GRPC contains the General RPC module.
module GRPC
  # BadStatus is an exception class that indicates that an error occurred at
  # either end of a GRPC connection.  When raised, it indicates that a status
  # error should be returned to the other end of a GRPC connection; when
  # caught it means that this end received a status error.
  class BadStatus < StandardError
    attr_reader :code, :details, :metadata

    # @param code [Numeric] the status code
    # @param details [String] the details of the exception
    def initialize(code, details = 'unknown cause', **kw)
      super("#{code}:#{details}")
      @code = code
      @details = details
      @metadata = kw
    end

    # Converts the exception to a GRPC::Status for use in the networking
    # wrapper layer.
    #
    # @return [Status] with the same code and details
    def to_status
      Struct::Status.new(code, details, @metadata)
    end
  end

  # Cancelled is an exception class that indicates that an rpc was cancelled.
  class Cancelled < StandardError
  end
end
