module Alerts
	module ClassMethods
		
		def send_alert(message,dat=nil)
			CityWatch.redis.zadd "#{CityWatch.config[:prefix]}::#{host}::#{self.name}::alerts", rcv_time, Yajl::Encoder.encode({:message => message, :data => dat, :when => rcv_time})
		end
	
		def alerts
			@alerts ||= []
			if block_given?
				@alerts.each do |a|
					yield a
				end
			else
				@alerts
			end
			nil
		end
	
		def get_alerts(host=host,num=5)
			CityWatch.redis.zrevrange "#{CityWatch.config[:prefix]}::#{host}::#{self.name}::alerts", 0, num - 1
		end
	
		def send_alerts!
			get_alerts.map do |alert|
				puts "Alert: #{alert.inspect}" if CityWatch.debug?
			end
		end
		
	end
	
	def self.included(base)
		base.extend(ClassMethods)
	end
	
end