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

diff --git a/app/controllers/geocoder_controller.rb b/app/controllers/geocoder_controller.rb
index 66962c7f6bf58d035e4125ec8e7053050e38e66c..f286ab9d3401046e51828e1e8e430e8f58338e22 100644 (file)
--- a/app/controllers/geocoder_controller.rb
+++ b/app/controllers/geocoder_controller.rb
@@ -3,19 +3,21 @@ class GeocoderController < ApplicationController
   require 'net/http'
   require 'rexml/document'
 
-  POSTCODE_ZOOM = 15
-  GEONAMES_ZOOM = 12
-
   def search
     query = params[:query]
     results = Array.new
 
-    if query.match(/^\d{5}(-\d{4})?$/)
+    query.sub(/^\s+/, "")
+    query.sub(/\s+$/, "")
+
+    if query.match(/^[+-]?\d+(\.\d*)?\s*[\s,]\s*[+-]?\d+(\.\d*)?$/)
+      results.push search_latlon(query)
+    elsif query.match(/^\d{5}(-\d{4})?$/)
       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)
+    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})$/i)
       results.push search_uk_postcode(query)
       results.push search_osm_namefinder(query)
-    elsif query.match(/[A-Z]\d[A-Z]\s*\d[A-Z]\d/i)
+    elsif query.match(/^[A-Z]\d[A-Z]\s*\d[A-Z]\d$/i)
       results.push search_ca_postcode(query)
     else
       results.push search_osm_namefinder(query)
@@ -29,7 +31,7 @@ class GeocoderController < ApplicationController
 
       if results_count == 1
         position = results.collect { |s| s[:results] }.compact.flatten[0]
-        page.call "setPosition", position[:lat], position[:lon], position[:zoom]
+        page.call "setPosition", position[:lat].to_f, position[:lon].to_f, position[:zoom].to_i
       else
         page.call "openSidebar"
       end
@@ -55,6 +57,29 @@ class GeocoderController < ApplicationController
 
 private
 
+  def search_latlon(query)
+    results = Array.new
+
+    # decode the location
+    if m = query.match(/^([+-]?\d+(\.\d*)?)\s*[\s,]\s*([+-]?\d+(\.\d*)?)$/)
+      lat = m[1].to_f
+      lon = m[3].to_f
+    end
+
+    # generate results
+    if lat < -90 or lat > 90
+      return { :source => "Internal", :url => "http://openstreetmap.org/", :error => "Latitude #{lat} out of range" }
+    elsif lon < -180 or lon > 180
+      return { :source => "Internal", :url => "http://openstreetmap.org/", :error => "Longitude #{lon} out of range" }
+    else
+      results.push({:lat => lat, :lon => lon,
+                    :zoom => APP_CONFIG['postcode_zoom'],
+                    :name => "#{lat}, #{lon}"})
+
+      return { :source => "Internal", :url => "http://openstreetmap.org/", :results => results }
+    end
+  end
+
   def search_us_postcode(query)
     results = Array.new
 
@@ -64,7 +89,8 @@ private
     # 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 => POSTCODE_ZOOM,
+      results.push({:lat => data[0], :lon => data[1],
+                    :zoom => APP_CONFIG['postcode_zoom'],
                     :prefix => "#{data[2]}, #{data[3]}, ",
                     :name => data[4]})
     end
@@ -85,7 +111,7 @@ private
       dataline = response.split(/\n/)[1]
       data = dataline.split(/,/) # easting,northing,postcode,lat,long
       postcode = data[2].gsub(/'/, "")
-      zoom = POSTCODE_ZOOM - postcode.count("#")
+      zoom = APP_CONFIG['postcode_zoom'] - postcode.count("#")
       results.push({:lat => data[3], :lon => data[4], :zoom => zoom,
                     :name => postcode})
     end
@@ -102,10 +128,10 @@ private
     response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{escape_query(query)}")
 
     # parse the response
-    unless response.get_elements("geodata/error")
+    if response.get_elements("geodata/error").empty?
       results.push({:lat => response.get_text("geodata/latt").to_s,
                     :lon => response.get_text("geodata/longt").to_s,
-                    :zoom => POSTCODE_ZOOM,
+                    :zoom => APP_CONFIG['postcode_zoom'],
                     :name => query.upcase})
     end
 
@@ -146,17 +172,18 @@ private
         if place.attributes["rank"].to_i <= 30
           parent = nil
           parentrank = 0
-          parentdistance = 0
+          parentscore = 0
 
           place.elements.each("nearestplaces/named") do |nearest|
             nearestrank = nearest.attributes["rank"].to_i
-            nearestdistance = nearest.attributes["distance"].to_f
+            nearestscore = nearestrank / nearest.attributes["distance"].to_f
 
-            if nearestrank > parentrank or
-               ( nearestrank == parentrank and nearestdistance < parentdistance )
+            if nearestrank > 30 and
+               ( nearestscore > parentscore or
+                 ( nearestscore == parentscore and nearestrank > parentrank ) )
               parent = nearest
               parentrank = nearestrank
-              parentdistance = nearestdistance
+              parentscore = nearestscore
             end
           end
 
@@ -166,7 +193,9 @@ private
             if  place.attributes["info"].to_s == "suburb"
               suffix = "#{suffix}, #{parentname}"
             else
-              suffix = "#{suffix} (near #{parentname})"
+              parentdistance = format_distance(parent.attributes["approxdistance"].to_i)
+              parentdirection = format_direction(parent.attributes["direction"].to_i)
+              suffix = "#{suffix} (#{parentdistance} #{parentdirection} of #{parentname})"
             end
           end
         end
@@ -196,7 +225,8 @@ 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 => GEONAMES_ZOOM,
+      results.push({:lat => lat, :lon => lon,
+                    :zoom => APP_CONFIG['geonames_zoom'],
                     :name => name,
                     :suffix => ", #{country}"})
     end