Cope with empty areas better.

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

diff --git a/app/controllers/geocoder_controller.rb b/app/controllers/geocoder_controller.rb
index 69c35e0e3c23e2fc36ba254946d69bb2dbb79f8d..8abcbdc4445a773acaad8bfe2506e90e16b609ba 100644 (file)
--- a/app/controllers/geocoder_controller.rb
+++ b/app/controllers/geocoder_controller.rb
@@ -4,18 +4,48 @@ class GeocoderController < ApplicationController
   require 'rexml/document'
 
   def search
-    @query = params[:query]
-    @results = Array.new
-
-    if @query.match(/^\d{5}(-\d{4})?$/)
-      @results.push search_us_postcode(@query)
-    elsif @query.match(/(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])\s*[0-9][ABD-HJLNP-UW-Z]{2})/i)
-      @results.push search_uk_postcode(@query)
-    elsif @query.match(/[A-Z]\d[A-Z]\s*\d[A-Z]\d/i)
-      @results.push search_ca_postcode(@query)
+    query = params[:query]
+    results = Array.new
+
+    if query.match(/^\d{5}(-\d{4})?$/)
+      results.push search_us_postcode(query)
+    elsif query.match(/(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])\s*[0-9][ABD-HJLNP-UW-Z]{2})/i)
+      results.push search_uk_postcode(query)
+    elsif query.match(/[A-Z]\d[A-Z]\s*\d[A-Z]\d/i)
+      results.push search_ca_postcode(query)
     else
-      @results.push search_osm_namefinder(@query)
-      @results.push search_geonames(@query)
+      results.push search_osm_namefinder(query)
+      results.push search_geonames(query)
+    end
+
+    results_count = count_results(results)
+
+    render :update do |page|
+      page.replace_html :search_results_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"
+      end
+    end
+  end
+  
+  def description
+    results = Array.new
+
+    lat = params[:lat]
+    lon = params[:lon]
+
+    results.push description_osm_namefinder("cities", lat, lon, 2)
+    results.push description_osm_namefinder("towns", lat, lon, 4)
+    results.push description_osm_namefinder("places", lat, lon, 10)
+    results.push description_geonames(lat, lon)
+
+    render :update do |page|
+      page.replace_html :search_results_content, :partial => 'results', :object => results
+      page.call "openSearchResults"
     end
   end
 
@@ -139,6 +169,52 @@ private
     return { :source => "GeoNames", :url => "http://www.geonames.org/", :error => "Error contacting ws.geonames.org: #{ex.to_s}" }
   end
 
+  def description_osm_namefinder(types, lat, lon, max)
+    results = Array.new
+
+    # ask OSM namefinder
+    response = fetch_xml("http://www.frankieandshadow.com/osm/search.xml?find=#{types}+near+#{lat},#{lon}&max=#{max}")
+
+    # parse the response
+    response.elements.each("searchresults/named") do |named|
+      lat = named.attributes["lat"].to_s
+      lon = named.attributes["lon"].to_s
+      zoom = named.attributes["zoom"].to_s
+      place = named.elements["place/named"] || named.elements["nearestplaces/named"]
+      type = named.attributes["info"].to_s
+      name = named.attributes["name"].to_s
+      description = named.elements["description"].to_s
+      distance = format_distance(place.attributes["approxdistance"].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,
+                    :description => description})
+    end
+
+    return { :type => types.capitalize, :source => "OpenStreetMap Namefinder", :url => "http://www.frankieandshadow.com/osm/", :results => results }
+  rescue Exception => ex
+    return { :type => types.capitalize, :source => "OpenStreetMap Namefinder", :url => "http://www.frankieandshadow.com/osm/", :error => "Error contacting www.frankieandshadow.com: #{ex.to_s}" }
+  end
+
+  def description_geonames(lat, lon)
+    results = Array.new
+
+    # ask geonames.org
+    response = fetch_xml("http://ws.geonames.org/countrySubdivision?lat=#{lat}&lng=#{lon}")
+
+    # parse the response
+    response.elements.each("geonames/countrySubdivision") do |geoname|
+      name = geoname.get_text("adminName1").to_s
+      country = geoname.get_text("countryName").to_s
+      results.push({:prefix => "#{name}, #{country}"})
+    end
+
+    return { :type => "Location", :source => "GeoNames", :url => "http://www.geonames.org/", :results => results }
+  rescue Exception => ex
+    return { :type => types.capitalize, :source => "OpenStreetMap Namefinder", :url => "http://www.frankieandshadow.com/osm/", :error => "Error contacting www.frankieandshadow.com: #{ex.to_s}" }
+  end
+
   def fetch_text(url)
     return Net::HTTP.get(URI.parse(url))
   end
@@ -162,4 +238,14 @@ private
     return "north-west" if bearing >= 292.5 and bearing < 337.5
     return "west"
   end
+
+  def count_results(results)
+    count = 0
+
+    results.each do |source|
+      count += source[:results].length if source[:results]
+    end
+
+    return count
+  end
 end