Improve translatability of nominatim results. Closes #2498.
[rails.git] / app / controllers / geocoder_controller.rb
index 8ef43ec6de66a4405758e7866fdcee849e8e9b59..9210fa8b5ebd31dee7f17b5aad09e0fa7ad2b068 100644 (file)
 class GeocoderController < ApplicationController
-  layout 'site'
-
+  require 'uri'
   require 'net/http'
   require 'rexml/document'
 
+  before_filter :authorize_web
+  before_filter :set_locale
+
   def search
-    res_hash = {}
-    @postcode_arr = []
-    @res_ary = []
-
-    if params[:query][:postcode] 
-      postcode = params[:query][:postcode].upcase
-      escaped_postcode = postcode.sub(/\s/,'%20')
-
-      if postcode.match(/(^\d{5}$)|(^\d{5}-\d{4}$)/)
-        # Its a zip code - ask geocoder.us
-        # (They have a non commerical use api)
-        Net::HTTP.start('rpc.geocoder.us') do |http|
-          resp = http.get("/service/csv?zip=#{postcode}")
-          if resp.body.match(/couldn't find this zip/)
-              redirect_to "/index.html?error=invalid_zip_code"
-              return
-          end
-          data = resp.body.split(/, /) # lat,long,town,state,zip
-          lat = data[0] 
-          lon = data[1]
-          redirect_to "/index.html?lat=#{lat}&lon=#{lon}&zoom=14"
-        end
-      elsif postcode.match(/^([A-Z]{1,2}\d+[A-Z]?\s*\d[A-Z]{2})/)
-        # It matched our naive UK postcode regexp
-        # Ask npemap to do a combined npemap + freethepostcode search
-        Net::HTTP.start('www.npemap.org.uk') do |http|
-          resp = http.get("/cgi/geocoder.fcgi?format=text&postcode=#{escaped_postcode}")
-          dataline = resp.body.split(/\n/)[1]
-          data = dataline.split(/,/) # easting,northing,postcode,lat,long
-          lat = data[3] 
-          lon = data[4]
-          redirect_to "/index.html?lat=#{lat}&lon=#{lon}&zoom=14"
-        end
-      elsif postcode.match(/^[A-Z]\d[A-Z]\s*\d[A-Z]\d/)
-        # It's a canadian postcode
-        # Ask geocoder.ca (note - they have a per-day limit)
-        postcode = postcode.sub(/\s/,'')
-        Net::HTTP.start('geocoder.ca') do |http|
-          resp = http.get("?geoit=XML&postal=#{postcode}")
-          data_lat = resp.body.slice(/latt>.*?</)
-          data_lon = resp.body.slice(/longt>.*?</)
-          lat = data_lat.split(/[<>]/)[1]
-          lon = data_lon.split(/[<>]/)[1]
-          redirect_to "/index.html?lat=#{lat}&lon=#{lon}&zoom=14"
-        end
+    @query = params[:query]
+    @sources = Array.new
+
+    @query.sub(/^\s+/, "")
+    @query.sub(/\s+$/, "")
+
+    if @query.match(/^[+-]?\d+(\.\d*)?\s*[\s,]\s*[+-]?\d+(\.\d*)?$/)
+      @sources.push "latlon"
+    elsif @query.match(/^\d{5}(-\d{4})?$/)
+      @sources.push "us_postcode"
+    elsif @query.match(/^(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])\s*[0-9][ABD-HJLNP-UW-Z]{2})$/i)
+      @sources.push "uk_postcode"
+      @sources.push "osm_nominatim"
+      @sources.push "osm_namefinder"
+    elsif @query.match(/^[A-Z]\d[A-Z]\s*\d[A-Z]\d$/i)
+      @sources.push "ca_postcode"
+    else
+      @sources.push "osm_nominatim"
+      @sources.push "osm_namefinder"
+      @sources.push "geonames"
+    end
+
+    render :update do |page|
+      page.replace_html :sidebar_content, :partial => "search"
+      page.call "openSidebar"
+    end
+  end
+
+  def search_latlon
+    # get query parameters
+    query = params[:query]
+
+    # create result array
+    @results = Array.new
+
+    # decode the location
+    if m = query.match(/^\s*([+-]?\d+(\.\d*)?)\s*[\s,]\s*([+-]?\d+(\.\d*)?)\s*$/)
+      lat = m[1].to_f
+      lon = m[3].to_f
+    end
+
+    # generate results
+    if lat < -90 or lat > 90
+      @error = "Latitude #{lat} out of range"
+      render :action => "error"
+    elsif lon < -180 or lon > 180
+      @error = "Longitude #{lon} out of range"
+      render :action => "error"
+    else
+      @results.push({:lat => lat, :lon => lon,
+                     :zoom => APP_CONFIG['postcode_zoom'],
+                     :name => "#{lat}, #{lon}"})
+
+      render :action => "results"
+    end
+  end
+
+  def search_us_postcode
+    # get query parameters
+    query = params[:query]
+
+    # create result array
+    @results = Array.new
+
+    # ask geocoder.us (they have a non-commercial use api)
+    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 => APP_CONFIG['postcode_zoom'],
+                     :prefix => "#{data[2]}, #{data[3]},",
+                     :name => data[4]})
+    end
+
+    render :action => "results"
+  rescue Exception => ex
+    @error = "Error contacting rpc.geocoder.us: #{ex.to_s}"
+    render :action => "error"
+  end
+
+  def search_uk_postcode
+    # get query parameters
+    query = params[:query]
+
+    # create result array
+    @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=#{escape_query(query)}")
+
+    # parse the response
+    unless response.match(/Error/)
+      dataline = response.split(/\n/)[1]
+      data = dataline.split(/,/) # easting,northing,postcode,lat,long
+      postcode = data[2].gsub(/'/, "")
+      zoom = APP_CONFIG['postcode_zoom'] - postcode.count("#")
+      @results.push({:lat => data[3], :lon => data[4], :zoom => zoom,
+                     :name => postcode})
+    end
+
+    render :action => "results"
+  rescue Exception => ex
+    @error = "Error contacting www.npemap.org.uk: #{ex.to_s}"
+    render :action => "error"
+  end
+
+  def search_ca_postcode
+    # get query parameters
+    query = params[:query]
+    @results = Array.new
+
+    # ask geocoder.ca (note - they have a per-day limit)
+    response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{escape_query(query)}")
+
+    # parse the response
+    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 => APP_CONFIG['postcode_zoom'],
+                     :name => query.upcase})
+    end
+
+    render :action => "results"
+  rescue Exception => ex
+    @error = "Error contacting geocoder.ca: #{ex.to_s}"
+    render :action => "error"
+  end
+
+  def search_osm_namefinder
+    # get query parameters
+    query = params[:query]
+
+    # create result array
+    @results = Array.new
+
+    # ask OSM namefinder
+    response = fetch_xml("http://gazetteer.openstreetmap.org/namefinder/search.xml?find=#{escape_query(query)}")
+
+    # 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.capitalize
+      name = named.attributes["name"].to_s
+      description = named.elements["description"].to_s
+
+      if name.empty?
+        prefix = ""
+        name = type
       else
-        # Some other postcode / zip code
-        # Throw it at geonames, and see if they have any luck with it
-        Net::HTTP.start('ws.geonames.org') do |http|
-          resp = http.get("/postalCodeSearch?postalcode=#{escaped_postcode}&maxRows=1")
-          hits = resp.body.slice(/totalResultsCount>.*?</).split(/[<>]/)[1]
-          if hits == "0"
-             # Geonames doesn't know, it's probably wrong
-             redirect_to "/index.html?error=unknown_postcode_or_zip"
-             return
-          end
-          data_lat = resp.body.slice(/lat>.*?</)
-          data_lon = resp.body.slice(/lng>.*?</)
-          lat = data_lat.split(/[<>]/)[1]
-          lon = data_lon.split(/[<>]/)[1]
-          redirect_to "/index.html?lat=#{lat}&lon=#{lon}&zoom=14"
-        end
+        prefix =  t "geocoder.search_osm_namefinder.prefix", :type => type
       end
-    else
-      if params[:query][:place_name] != nil or "" 
-        place_name = params[:query][:place_name]
-        Net::HTTP.start('ws.geonames.org') do |http|
-          res = http.get("/search?q=#{place_name}&maxRows=10")
-          xml = REXML::Document.new(res.body)
-          xml.elements.each("geonames/geoname") do |ele|
-            res_hash = {}
-            ele.elements.each("name"){ |n| res_hash['name'] = n.text }
-            ele.elements.each("countryCode"){ |n| res_hash['country_code'] = n.text }
-            ele.elements.each("countryNode"){ |n| res_hash['country_name'] = n.text }
-            ele.elements.each("lat"){ |n| res_hash['lat'] = n.text }
-            ele.elements.each("lng"){ |n| res_hash['lon']= n.text }
-            @res_ary << res_hash
-          end 
+
+      if place
+        distance = format_distance(place.attributes["approxdistance"].to_i)
+        direction = format_direction(place.attributes["direction"].to_i)
+        placename = format_name(place.attributes["name"].to_s)
+        suffix = t "geocoder.search_osm_namefinder.suffix_place", :distance => distance, :direction => direction, :placename => placename
+
+        if place.attributes["rank"].to_i <= 30
+          parent = nil
+          parentrank = 0
+          parentscore = 0
+
+          place.elements.each("nearestplaces/named") do |nearest|
+            nearestrank = nearest.attributes["rank"].to_i
+            nearestscore = nearestrank / nearest.attributes["distance"].to_f
+
+            if nearestrank > 30 and
+               ( nearestscore > parentscore or
+                 ( nearestscore == parentscore and nearestrank > parentrank ) )
+              parent = nearest
+              parentrank = nearestrank
+              parentscore = nearestscore
+            end
+          end
+
+          if parent
+            parentname = format_name(parent.attributes["name"].to_s)
+
+            if  place.attributes["info"].to_s == "suburb"
+              suffix = t "geocoder.search_osm_namefinder.suffix_suburb", :suffix => suffix, :parentname => parentname
+            else
+              parentdistance = format_distance(parent.attributes["approxdistance"].to_i)
+              parentdirection = format_direction(parent.attributes["direction"].to_i)
+              suffix = t "geocoder.search_osm_namefinder.suffix_parent", :suffix => suffix, :parentdistance => parentdistance, :parentdirection => parentdirection, :parentname => parentname
+            end
+          end
         end
+      else
+        suffix = ""
       end
-      redirect_to :controller => 'geocoder', :action => 'results', :params => @res_ary
+
+      @results.push({:lat => lat, :lon => lon, :zoom => zoom,
+                     :prefix => prefix, :name => name, :suffix => suffix,
+                     :description => description})
     end
+
+    render :action => "results"
+  rescue Exception => ex
+    @error = "Error contacting gazetteer.openstreetmap.org: #{ex.to_s}"
+    render :action => "error"
+  end
+
+  def search_osm_nominatim
+    # get query parameters
+    query = params[:query]
+    minlon = params[:minlon]
+    minlat = params[:minlat]
+    maxlon = params[:maxlon]
+    maxlat = params[:maxlat]
+
+    # get view box
+    if minlon && minlat && maxlon && maxlat
+      viewbox = "&viewbox=#{minlon},#{maxlat},#{maxlon},#{minlat}"
+    end
+
+    # create result array
+    @results = Array.new
+
+    # ask nominatim
+    response = fetch_xml("http://nominatim.openstreetmap.org/search?format=xml&q=#{escape_query(query)}#{viewbox}&accept-language=#{request.user_preferred_languages.join(',')}")
+
+    # parse the response
+    response.elements.each("searchresults/place") do |place|
+      lat = place.attributes["lat"].to_s
+      lon = place.attributes["lon"].to_s
+      klass = place.attributes["class"].to_s
+      type = place.attributes["type"].to_s
+      name = place.attributes["display_name"].to_s
+      min_lat,max_lat,min_lon,max_lon = place.attributes["boundingbox"].to_s.split(",")
+      prefix = t "geocoder.search_osm_nominatim.prefix_#{type}", :default => type.gsub("_", " ").capitalize
+
+      @results.push({:lat => lat, :lon => lon,
+                     :min_lat => min_lat, :max_lat => max_lat,
+                     :min_lon => min_lon, :max_lon => max_lon,
+                     :prefix => prefix, :name => name})
+    end
+
+    render :action => "results"
+  rescue Exception => ex
+    @error = "Error contacting nominatim.openstreetmap.org: #{ex.to_s}"
+    render :action => "error"
+  end
+
+  def search_geonames
+    # get query parameters
+    query = params[:query]
+
+    # create result array
+    @results = Array.new
+
+    # ask geonames.org
+    response = fetch_xml("http://ws.geonames.org/search?q=#{escape_query(query)}&maxRows=20")
+
+    # parse the response
+    response.elements.each("geonames/geoname") do |geoname|
+      lat = geoname.get_text("lat").to_s
+      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 => APP_CONFIG['geonames_zoom'],
+                     :name => name,
+                     :suffix => ", #{country}"})
+    end
+
+    render :action => "results"
+  rescue Exception => ex
+    @error = "Error contacting ws.geonames.org: #{ex.to_s}"
+    render :action => "error"
+  end
+
+  def description
+    @sources = Array.new
+
+    @sources.push({ :name => "osm_nominatim" })
+    @sources.push({ :name => "osm_namefinder", :types => "cities", :max => 2 })
+    @sources.push({ :name => "osm_namefinder", :types => "towns", :max => 4 })
+    @sources.push({ :name => "osm_namefinder", :types => "places", :max => 10 })
+    @sources.push({ :name => "geonames" })
+
+    render :update do |page|
+      page.replace_html :sidebar_content, :partial => "description"
+      page.call "openSidebar"
+    end
+  end
+
+  def description_osm_namefinder
+    # get query parameters
+    lat = params[:lat]
+    lon = params[:lon]
+    types = params[:types]
+    max = params[:max]
+
+    # create result array
+    @results = Array.new
+
+    # ask OSM namefinder
+    response = fetch_xml("http://gazetteer.openstreetmap.org/namefinder/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 = t "geocoder.description_osm_namefinder.prefix", :distance => distance, :direction => direction, :type => type
+      @results.push({:lat => lat, :lon => lon, :zoom => zoom,
+                     :prefix => prefix.capitalize, :name => name,
+                     :description => description})
+    end
+
+    render :action => "results"
+  rescue Exception => ex
+    @error = "Error contacting gazetteer.openstreetmap.org: #{ex.to_s}"
+    render :action => "error"
+  end
+
+  def description_osm_nominatim
+    # get query parameters
+    lat = params[:lat]
+    lon = params[:lon]
+    zoom = params[:zoom]
+
+    # create result array
+    @results = Array.new
+
+    # ask OSM namefinder
+    response = fetch_xml("http://nominatim.openstreetmap.org/reverse?lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{request.user_preferred_languages.join(',')}")
+
+    # parse the response
+    response.elements.each("reversegeocode") do |result|
+      description = result.get_text("result").to_s
+
+      @results.push({:prefix => "#{description}"})
+    end
+
+    render :action => "results"
+  rescue Exception => ex
+    @error = "Error contacting nominatim.openstreetmap.org: #{ex.to_s}"
+    render :action => "error"
+  end
+
+  def description_geonames
+    # get query parameters
+    lat = params[:lat]
+    lon = params[:lon]
+
+    # create result array
+    @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
+
+    render :action => "results"
+  rescue Exception => ex
+    @error = "Error contacting ws.geonames.org: #{ex.to_s}"
+    render :action => "error"
+  end
+
+private
+
+  def fetch_text(url)
+    return Net::HTTP.get(URI.parse(url))
+  end
+
+  def fetch_xml(url)
+    return REXML::Document.new(fetch_text(url))
+  end
+
+  def format_distance(distance)
+    return t("geocoder.distance", :count => distance)
+  end
+
+  def format_direction(bearing)
+    return t("geocoder.direction.south_west") if bearing >= 22.5 and bearing < 67.5
+    return t("geocoder.direction.south") if bearing >= 67.5 and bearing < 112.5
+    return t("geocoder.direction.south_east") if bearing >= 112.5 and bearing < 157.5
+    return t("geocoder.direction.east") if bearing >= 157.5 and bearing < 202.5
+    return t("geocoder.direction.north_east") if bearing >= 202.5 and bearing < 247.5
+    return t("geocoder.direction.north") if bearing >= 247.5 and bearing < 292.5
+    return t("geocoder.direction.north_west") if bearing >= 292.5 and bearing < 337.5
+    return t("geocoder.direction.west")
+  end
+
+  def format_name(name)
+    return name.gsub(/( *\[[^\]]*\])*$/, "")
+  end
+
+  def count_results(results)
+    count = 0
+
+    results.each do |source|
+      count += source[:results].length if source[:results]
+    end
+
+    return count
   end
 
-  def result
-    @res = :params[@res_ary]
+  def escape_query(query)
+    return URI.escape(query, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]", false, 'N'))
   end
 end