class Restforce::Client

def faye
  raise 'Instance URL missing. Call .authenticate! first.' unless @options[:instance_url]
  @faye ||= Faye::Client.new("#{@options[:instance_url]}/cometd/#{@options[:api_version]}").tap do |client|
    raise 'OAuth token missing. Call .authenticate! first.' unless @options[:oauth_token]
    client.set_header 'Authorization', "OAuth #{@options[:oauth_token]}"
    client.bind 'transport:down' do
      Restforce.log "[COMETD DOWN]"
    end
    client.bind 'transport:up' do
      Restforce.log "[COMETD UP]"
    end
  end
end