bus/app/controllers/ruling_buses_controller.rb

class RulingBusesController < ApplicationController
	before_action :set_time_thresh_and_locale
	def widget
		set_time_thresh_and_locale
		subpart = OrbitHelper.get_current_widget
		begin
	    	cats = OrbitHelper.widget_categories || ['all']
	    	@ruling_buses = RulingBusInfo.filter_by_widget_categories(cats)
			bus_trans = t('ruling_bus.ruling_bus')
			bus_infos = []
			@ruling_buses.each do |bus_info|
				bus_title = bus_info.destination.blank? ? ("#{bus_trans}(#{bus_info.monitor_point_show}" + (bus_info.hint.blank? ? (": "+I18n.t("ruling_bus.directions.#{bus_info.direction}")) : bus_info.hint) + ")") : "#{bus_trans}(#{bus_info.monitor_point_show}➠#{bus_info.destination_show})"
				bus_data = get_bus_data(bus_info)
				bus_infos << {"bus_title" => bus_title,
							  "bus_id" => bus_info.id.to_s,
							  "bus_data" => bus_data
							  }
			end
			{
				"bus_infos" => bus_infos,
				"extras" => {
					"update_url" => "/#{I18n.locale}/xhr/get_bus",
					"update_method" => "get",
					"update_interval" => RulingBusesHelper::UpdateFrontInterval*1000,
					"update_id" => subpart.id.to_s
				}
			}
		rescue => e
			puts [e,e.backtrace]
		end
	end
	def get_bus
		bus_infos = RulingBusInfo.where(:id.in => params[:bus_info_ids])
		data = {}
		bus_infos.each do |bus_info|
			get_bus_data(bus_info,data)
		end
		render :json => data
	end
private
	def set_time_thresh_and_locale
		@time_now = DateTime.now
		@bus_locale = I18n.locale.to_s=='zh_tw' ? "Zh_tw" : 'En'
		@time_thresh = @time_now - RulingBusesHelper::UpdateInterval.seconds
	end
	def get_bus_data(bus_info,data=nil)
		bus_info_id = bus_info.id.to_s
		cache = RulingBusCache.where(bus_info_id: bus_info_id).first
		if (cache.nil? || cache.updated_at < @time_thresh)
			tmp = RulingBusesHelper.get_stop_time(bus_info,@bus_locale)
			if !tmp.nil?
				if cache.nil?
					RulingBusCache.create(dict: tmp, bus_info_id: bus_info_id)
				else
					cache.update_attributes(dict: tmp, updated_at: Time.now)
				end
			else
				tmp = cache.dict
			end
		else
			tmp = cache.dict
		end
		tmp = tmp.map do |v|
			{"route_name"=> v["RouteName"][@bus_locale],
			 "time_to_arrive" => parse_time_diff(v,@time_now)
			}
	    end
		data[bus_info_id] = tmp if !data.nil?
		tmp
	end
	def parse_time_diff(bus_data,now=nil)
		arival = bus_data["NextBusTime"]
		if !arival.blank?
			arival = DateTime.parse(arival)
			time_diff = ((arival-(now||DateTime.now))*1.days).to_i
			h = time_diff/3600
			tmp = time_diff%3600
			m = tmp/60
			s = tmp%60
			if time_diff>=3600
				"#{h}#{I18n.t("ruling_bus.time.hour")} #{m}#{I18n.t("ruling_bus.time.minute")} #{s}#{I18n.t("ruling_bus.time.second")}"
			elsif time_diff>=60
				"#{m}#{I18n.t("ruling_bus.time.minute")} #{s}#{I18n.t("ruling_bus.time.second")}"
			elsif time_diff>0
				"#{s}#{I18n.t("ruling_bus.time.second")}"
			else
				I18n.t("ruling_bus.leaved")
			end+(bus_data["StopStatus"]==0? "" : " (#{I18n.t("ruling_bus.bus_status.#{bus_data["StopStatus"]}")})")
		else
			I18n.t("ruling_bus.bus_status.#{bus_data["StopStatus"]}")
		end
	end
end