require 'open-uri'
require "net/http"
require 'rexml/document'

def query_overpass(object_type, left,bottom,right,top, key, value)
   base_url = "http://www.overpass-api.de/api/xapi?"
   query_string = "#{object_type}[bbox=#{left},#{bottom},#{right},#{top}][#{key}=#{value}]"
   url = "#{base_url}#{URI.encode(query_string)}"
   resp = Net::HTTP.get_response(URI.parse(url))
   data = resp.body
   return data
end

overpass_result = REXML::Document.new(query_overpass("node", 7.1,51.2,7.2,51.3,"amenity","restaurant|pub|ice_cream|food_court|fast_food|cafe|biergarten|bar|bakery|steak|pasta|pizza|sushi|asia|nightclub"))

overpass_result.elements.each('osm/node') {|x|
  if !x.elements["tag[@k='name']"].nil?
    print x.elements["tag[@k='name']"].attributes["v"]
  end
  print " | "

  if !x.elements["tag[@k='addr:postcode']"].nil?
    print x.elements["tag[@k='addr:postcode']"].attributes["v"]
    print ", "
  end
  if !x.elements["tag[@k='addr:city']"].nil?
    print x.elements["tag[@k='addr:city']"].attributes["v"]
    print ", "
  end
  if !x.elements["tag[@k='addr:street']"].nil?
    print x.elements["tag[@k='addr:street']"].attributes["v"]
    print ", "
  end
  if !x.elements["tag[@k='addr:housenumber']"].nil?
    print x.elements["tag[@k='addr:housenumber']"].attributes["v"]
  end
  print " | "
  print x.attributes["lat"]
  print " | "
  print x.attributes["lon"]
  print " | "
  if !x.elements["tag[@k='website']"].nil?
    print x.elements["tag[@k='website']"].attributes["v"]
  end
  print " | "
  if !x.elements["tag[@k='amenity']"].nil?
    print x.elements["tag[@k='amenity']"].attributes["v"]
    print " | "
  end
  puts
}