app/controllers/geocoder_controller.rb

   1 class GeocoderController < ApplicationController
   2   layout 'site'
   3
   4   require 'net/http'
   5   require 'rexml/document'
   6
   7   def search
   8     res_hash = {}
   9     @postcode_arr = []
  10     @res_ary = []
  11
  12     if params[:query][:postcode]
  13       postcode = params[:query][:postcode]
  14       escaped_postcode = postcode.sub(/\s/,'%20')
  15       if postcode.match(/(^\d{5}$)|(^\d{5}-\d{4}$)/)
  16         #its a zip code - do something
  17       else
  18         # Assume it's a UK postcode.
  19         # Fairly naive regexp is: \w{1,2}\d+\w?\s?\d\w\w
  20
  21         # Ask npemap to do a combined npemap + freethepostcode search
  22         Net::HTTP.start('www.npemap.org.uk') do |http|
  23           resp = http.get("/cgi/geocoder.fcgi?format=text&postcode=#{escaped_postcode}")
  24           dataline = resp.body.split(/\n/)[1]
  25           data = dataline.split(/,/) # easting,northing,postcode,lat,long
  26           lat = data[3]
  27           lon = data[4]
  28           $stderr.print postcode
  29           $stderr.print dataline
  30           redirect_to "/index.html?lat=#{lat}&lon=#{lon}&zoom=14"
  31         end
  32       end
  33     else
  34       if params[:query][:place_name] != nil or ""
  35         place_name = params[:query][:place_name]
  36         Net::HTTP.start('ws.geonames.org') do |http|
  37           res = http.get("/search?q=#{place_name}&maxRows=10")
  38           xml = REXML::Document.new(res.body)
  39           xml.elements.each("geonames/geoname") do |ele|
  40             res_hash = {}
  41             ele.elements.each("name"){ |n| res_hash['name'] = n.text }
  42             ele.elements.each("countryCode"){ |n| res_hash['country_code'] = n.text }
  43             ele.elements.each("countryNode"){ |n| res_hash['country_name'] = n.text }
  44             ele.elements.each("lat"){ |n| res_hash['lat'] = n.text }
  45             ele.elements.each("lng"){ |n| res_hash['lon']= n.text }
  46             @res_ary << res_hash
  47           end
  48         end
  49       end
  50       redirect_to :controller => 'geocoder', :action => 'results', :params => @res_ary
  51     end
  52   end
  53
  54   def result
  55     @res = :params[@res_ary]
  56   end
  57 end