Class: Bahn::Agent

Inherits:
Object
  • Object
show all
Defined in:
lib/bahn/bahn_agent.rb

Overview

> Am 2013-02-01 von 23:07 bis 23:15 : Oberseestr., Berlin nach Berlin - Alt-Hohenschönhausen, Hauptstraße 10 via Fußweg

Constant Summary collapse

@@options = 
{
	:url_route => 'http://mobile.bahn.de/bin/mobil/query.exe/dox?country=DEU&rt=1&use_realtime_filter=1&searchMode=ADVANCED',
	:uri_adresses => 'http://reiseauskunft.bahn.de/bin/ajax-getstop.exe/en?REQ0JourneyStopsS0A=2&REQ0JourneyStopsS0G=',
	:uri_stations => 'http://reiseauskunft.bahn.de/bin/ajax-getstop.exe/en?REQ0JourneyStopsS0A=1&REQ0JourneyStopsS0G='			
}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Agent

Initialize a new Agent options:

:user_agent => Set the user agent. Default: "bahn.rb"



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# File 'lib/bahn/bahn_agent.rb', line 34

def initialize
	@agent = Mechanize.new
	@agent.user_agent = @@user_agent ||= "bahn.rb"
end

Class Method Details

.user_agent=(val) ⇒ Object

Set the used user agent



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# File 'lib/bahn/bahn_agent.rb', line 27

def self.user_agent=val
	@@user_agent = val
end

Instance Method Details

#find_address(address) ⇒ Object

Finds the first usable address for the given parameter. The returned address can then be used for further processing in routes Example: Input: Roßstr. 41 40476 Düsseldorf Output: Düsseldorf - Golzheim, Rossstraße 41



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# File 'lib/bahn/bahn_agent.rb', line 100

def find_address address		
	result = @agent.get("#{@@options[:uri_adresses]}#{address}").body.gsub("SLs.sls=", "").gsub(";SLs.showSuggestion();", "")
	# a Mechanize::File instead of a Page is returned so we have to convert manually
	result = Iconv.conv("utf-8", "iso-8859-1", result)
	JSON.parse(result)["suggestions"].first["value"]
end

#find_station(name) ⇒ Object

Find the first best station by name Example: Input: HH Allee Düsseldorf Output: Heinrich-Heine-Allee U, Düsseldorf



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# File 'lib/bahn/bahn_agent.rb', line 89

def find_station name		
	result = @agent.get("#{@@options[:uri_stations]}#{name}").body.gsub("SLs.sls=", "").gsub(";SLs.showSuggestion();", "")
	# a Mechanize::File instead of a Page is returned so we have to convert manually
	result = Iconv.conv("utf-8", "iso-8859-1", result)
	r = JSON.parse(result)["suggestions"].first["value"]
end

#get_routes(from, to, options = {}) ⇒ Object

Get the next few routes with public transportation from A to B.

:start_type and :target_type should be the same, no other options is implemented yet Options: * :time => start time for the connection * :start_type => 1 = station, 2 = address * :target_type => 1 = station, 2 = address Returns: Array of Bahn::Route(s) Raises: “no_route” if no route could be found



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# File 'lib/bahn/bahn_agent.rb', line 50

def get_routes from, to, options = {}
	options = {:time => Time.now, :start_type => 2, :target_type => 2, :depth => 0}.merge(options)
	page = @agent.get @@options[:url_route]
	form = page.forms.first
	form["REQ0JourneyDate"] = "#{options[:time].day}.#{options[:time].month}.#{options[:time].year-2000}"
	form["REQ0JourneyTime"] = "#{options[:time].hour}:#{options[:time].min}"
	form["REQ0JourneyStopsS0A"] = options[:start_type]
	form["REQ0JourneyStopsZ0A"] = options[:target_type]
	form["REQ0JourneyStopsS0G"] = from
	form["REQ0JourneyStopsZ0G"] = to			
	result = form.submit(form.button_with(:value => "Suchen"))
	
	type = :undefined
	type = :door2door if options[:start_type] == 2 && options[:target_type] == 2
	type = :station2station if options[:start_type] == 1 && options[:target_type] == 1

	routes = []
	links = result.links_with(:href => /details=opened!/)
	links.each  do |link|
	  page = link.click 
	  routes << Route.new(page, type)
	end
	
	# Keine Station gefunden und es werden keine Vorschläge angezeigt... 
	# also suchen wir nachder nächstbesten Adresse und nutzen dies
	if links.count == 0 && options[:depth] == 0 && type == :door2door
		from = find_address from
		to = find_address to
		return get_routes from, to, {:time => options[:time], :depth => options[:depth]+1}
	end
	
	raise "no_route" if routes.count == 0 || links.count == 0			
	routes
end