Began code for feature lookup: implemented code to respond to mouse click and latlon...

[rails.git] / app / controllers / geocoder_controller.rb

diff --git a/app/controllers/geocoder_controller.rb b/app/controllers/geocoder_controller.rb
index 4ed94b6498be7aa70e9ffa47b1d6218b9f83dae1..f4093c75ac8ef13bc000e4098fe7a32154191d17 100644 (file)
--- a/app/controllers/geocoder_controller.rb
+++ b/app/controllers/geocoder_controller.rb
@@ -3,6 +3,9 @@ class GeocoderController < ApplicationController
   require 'net/http'
   require 'rexml/document'
 
+  POSTCODE_ZOOM = 15
+  GEONAMES_ZOOM = 12
+
   def search
     query = params[:query]
     results = Array.new
@@ -21,13 +24,13 @@ class GeocoderController < ApplicationController
     results_count = count_results(results)
 
     render :update do |page|
-      page.replace_html :search_results_content, :partial => 'results', :object => results
+      page.replace_html :sidebar_content, :partial => 'results', :object => results
 
       if results_count == 1
         position = results.collect { |s| s[:results] }.compact.flatten[0]
         page.call "setPosition", position[:lat], position[:lon], position[:zoom]
       else
-        page.call "openSearchResults"
+        page.call "openSidebar"
       end
     end
   end
@@ -44,8 +47,8 @@ class GeocoderController < ApplicationController
     results.push description_geonames(lat, lon)
 
     render :update do |page|
-      page.replace_html :search_results_content, :partial => 'results', :object => results
-      page.call "openSearchResults"
+      page.replace_html :sidebar_content, :partial => 'results', :object => results
+      page.call "openSidebar"
     end
   end
 
@@ -55,12 +58,12 @@ private
     results = Array.new
 
     # ask geocoder.us (they have a non-commercial use api)
-    response = fetch_text("http://rpc.geocoder.us/service/csv?zip=#{URI.escape(query)}")
+    response = fetch_text("http://rpc.geocoder.us/service/csv?zip=#{escape_query(query)}")
 
     # parse the response
     unless response.match(/couldn't find this zip/)
       data = response.split(/\s*,\s+/) # lat,long,town,state,zip
-      results.push({:lat => data[0], :lon => data[1], :zoom => 12,
+      results.push({:lat => data[0], :lon => data[1], :zoom => POSTCODE_ZOOM,
                     :prefix => "#{data[2]}, #{data[3]}, ",
                     :name => data[4]})
     end
@@ -74,13 +77,13 @@ private
     results = Array.new
 
     # ask npemap.org.uk to do a combined npemap + freethepostcode search
-    response = fetch_text("http://www.npemap.org.uk/cgi/geocoder.fcgi?format=text&postcode=#{URI.escape(query)}")
+    response = fetch_text("http://www.npemap.org.uk/cgi/geocoder.fcgi?format=text&postcode=#{escape_query(query)}")
 
     # parse the response
     unless response.match(/Error/)
       dataline = response.split(/\n/)[1]
       data = dataline.split(/,/) # easting,northing,postcode,lat,long
-      results.push({:lat => data[3], :lon => data[4], :zoom => 12,
+      results.push({:lat => data[3], :lon => data[4], :zoom => POSTCODE_ZOOM,
                     :name => data[2].gsub(/'/, "")})
     end
 
@@ -93,13 +96,13 @@ private
     results = Array.new
 
     # ask geocoder.ca (note - they have a per-day limit)
-    response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{URI.escape(query)}")
+    response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{escape_query(query)}")
 
     # parse the response
     unless response.get_elements("geodata/error")
       results.push({:lat => response.get_text("geodata/latt").to_s,
                     :lon => response.get_text("geodata/longt").to_s,
-                    :zoom => 12,
+                    :zoom => POSTCODE_ZOOM,
                     :name => query.upcase})
     end
 
@@ -112,7 +115,7 @@ private
     results = Array.new
 
     # ask OSM namefinder
-    response = fetch_xml("http://www.frankieandshadow.com/osm/search.xml?find=#{URI.escape(query)}")
+    response = fetch_xml("http://www.frankieandshadow.com/osm/search.xml?find=#{escape_query(query)}")
 
     # parse the response
     response.elements.each("searchresults/named") do |named|
@@ -151,7 +154,7 @@ private
     results = Array.new
 
     # ask geonames.org
-    response = fetch_xml("http://ws.geonames.org/search?q=#{URI.escape(query)}&maxRows=20")
+    response = fetch_xml("http://ws.geonames.org/search?q=#{escape_query(query)}&maxRows=20")
 
     # parse the response
     response.elements.each("geonames/geoname") do |geoname|
@@ -159,7 +162,7 @@ private
       lon = geoname.get_text("lng").to_s
       name = geoname.get_text("name").to_s
       country = geoname.get_text("countryName").to_s
-      results.push({:lat => lat, :lon => lon, :zoom => 12,
+      results.push({:lat => lat, :lon => lon, :zoom => GEONAMES_ZOOM,
                     :name => name,
                     :suffix => ", #{country}"})
     end
@@ -185,7 +188,7 @@ private
       name = named.attributes["name"].to_s
       description = named.elements["description"].to_s
       distance = format_distance(place.attributes["approxdistance"].to_i)
-      direction = format_direction(360 - place.attributes["direction"].to_i)
+      direction = format_direction((place.attributes["direction"].to_i - 180) % 360)
       prefix = "#{distance} #{direction} of #{type} "
       results.push({:lat => lat, :lon => lon, :zoom => zoom,
                     :prefix => prefix.capitalize, :name => name,
@@ -248,4 +251,8 @@ private
 
     return count
   end
+
+  def escape_query(query)
+    return URI.escape(query, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]", false, 'N'))
+  end
 end