Merge remote-tracking branch 'upstream/pull/5408'

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

diff --git a/app/controllers/geocoder_controller.rb b/app/controllers/geocoder_controller.rb
index 2348425886342ec9d979a2800842da049ffef6a2..43f276efa020a35cfdbb1719155c4a3f5e61c1fe 100644 (file)
--- a/app/controllers/geocoder_controller.rb
+++ b/app/controllers/geocoder_controller.rb
@@ -1,5 +1,3 @@
-# coding: utf-8
-

 class GeocoderController < ApplicationController
   require "cgi"
   require "uri"
 class GeocoderController < ApplicationController
   require "cgi"
   require "uri"


@@ -8,29 +6,17 @@ class GeocoderController < ApplicationController
   before_action :authorize_web
   before_action :set_locale
   before_action :require_oauth, :only => [:search]
   before_action :authorize_web
   before_action :set_locale
   before_action :require_oauth, :only => [:search]

+  authorize_resource :class => false

 
   def search
     @params = normalize_params
     @sources = []
 
     if @params[:lat] && @params[:lon]
 
   def search
     @params = normalize_params
     @sources = []
 
     if @params[:lat] && @params[:lon]

-      @sources.push "latlon"
-      @sources.push "osm_nominatim_reverse"
-      @sources.push "geonames_reverse" if defined?(GEONAMES_USERNAME)
+      @sources.push(:name => "latlon", :url => root_path)
+      @sources.push(:name => "osm_nominatim_reverse", :url => nominatim_reverse_url(:format => "html"))

     elsif @params[:query]
     elsif @params[:query]

-      if @params[:query] =~ /^\d{5}(-\d{4})?$/
-        @sources.push "us_postcode"
-        @sources.push "osm_nominatim"
-      elsif @params[:query] =~ /^(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])\s*[0-9][ABD-HJLNP-UW-Z]{2})$/i
-        @sources.push "uk_postcode"
-        @sources.push "osm_nominatim"
-      elsif @params[:query] =~ /^[A-Z]\d[A-Z]\s*\d[A-Z]\d$/i
-        @sources.push "ca_postcode"
-        @sources.push "osm_nominatim"
-      else
-        @sources.push "osm_nominatim"
-        @sources.push "geonames" if defined?(GEONAMES_USERNAME)
-      end
+      @sources.push(:name => "osm_nominatim", :url => nominatim_url(:format => "html"))

     end
 
     if @sources.empty?
     end
 
     if @sources.empty?


@@ -43,148 +29,83 @@ class GeocoderController < ApplicationController
   def search_latlon
     lat = params[:lat].to_f
     lon = params[:lon].to_f
   def search_latlon
     lat = params[:lat].to_f
     lon = params[:lon].to_f

-    if lat < -90 || lat > 90
-      @error = "Latitude #{lat} out of range"
-      render :action => "error"
-    elsif lon < -180 || lon > 180
-      @error = "Longitude #{lon} out of range"
-      render :action => "error"
-    else
-      @results = [{ :lat => lat, :lon => lon,
-                    :zoom => params[:zoom],
-                    :name => "#{lat}, #{lon}" }]
-
-      render :action => "results"
-    end
-  end
-
-  def search_us_postcode
-    # get query parameters
-    query = params[:query]
-
-    # create result array
-    @results = []
-
-    # 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 =~ /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,
-                    :prefix => "#{data[2]}, #{data[3]},",
-                    :name => data[4])
-    end
-
-    render :action => "results"
-  rescue StandardError => ex
-    @error = "Error contacting rpc.geocoder.us: #{ex}"
-    render :action => "error"
-  end
-
-  def search_uk_postcode
-    # get query parameters
-    query = params[:query]
-
-    # create result array
-    @results = []
-
-    # 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 =~ /Error/
-      dataline = response.split(/\n/)[1]
-      data = dataline.split(/,/) # easting,northing,postcode,lat,long
-      postcode = data[2].delete("'")
-      zoom = POSTCODE_ZOOM - postcode.count("#")
-      @results.push(:lat => data[3], :lon => data[4], :zoom => zoom,
-                    :name => postcode)
-    end
+    if params[:latlon_digits]
+      # We've got two nondescript numbers for a query, which can mean both "lat, lon" or "lon, lat".
+      @results = []

 
 

-    render :action => "results"
-  rescue StandardError => ex
-    @error = "Error contacting www.npemap.org.uk: #{ex}"
-    render :action => "error"
-  end
+      if lat >= -90 && lat <= 90 && lon >= -180 && lon <= 180
+        @results.push(:lat => params[:lat], :lon => params[:lon],
+                      :zoom => params[:zoom],
+                      :name => "#{params[:lat]}, #{params[:lon]}")
+      end

 
 

-  def search_ca_postcode
-    # get query parameters
-    query = params[:query]
-    @results = []
+      if lon >= -90 && lon <= 90 && lat >= -180 && lat <= 180
+        @results.push(:lat => params[:lon], :lon => params[:lat],
+                      :zoom => params[:zoom],
+                      :name => "#{params[:lon]}, #{params[:lat]}")
+      end

 
 

-    # ask geocoder.ca (note - they have a per-day limit)
-    response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{escape_query(query)}")
+      if @results.empty?
+        @error = "Latitude or longitude are out of range"
+        render :action => "error"
+      else
+        render :action => "results"
+      end
+    else
+      # Coordinates in a query have come with markers for latitude and longitude.
+      if lat < -90 || lat > 90
+        @error = "Latitude #{lat} out of range"
+        render :action => "error"
+      elsif lon < -180 || lon > 180
+        @error = "Longitude #{lon} out of range"
+        render :action => "error"
+      else
+        @results = [{ :lat => params[:lat], :lon => params[:lon],
+                      :zoom => params[:zoom],
+                      :name => "#{params[:lat]}, #{params[:lon]}" }]

 
 

-    # 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 => POSTCODE_ZOOM,
-                    :name => query.upcase)
+        render :action => "results"
+      end

     end
     end

-
-    render :action => "results"
-  rescue StandardError => ex
-    @error = "Error contacting geocoder.ca: #{ex}"
-    render :action => "error"

   end
 
   def search_osm_nominatim
   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
-
-    # get objects to excude
-    exclude = "&exclude_place_ids=#{params[:exclude]}" if params[:exclude]
-

     # ask nominatim
     # ask nominatim

-    response = fetch_xml("http:#{NOMINATIM_URL}search?format=xml&extratags=1&q=#{escape_query(query)}#{viewbox}#{exclude}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
+    response = fetch_xml(nominatim_url(:format => "xml"))

 
     # extract the results from the response
 
     # extract the results from the response

-    results =  response.elements["searchresults"]
-
-    # extract parameters from more_url
-    more_url_params = CGI.parse(URI.parse(results.attributes["more_url"]).query)
+    results = response.elements["searchresults"]

 
     # create result array
     @results = []
 
     # create parameter hash for "more results" link
 
     # create result array
     @results = []
 
     # create parameter hash for "more results" link

-    @more_params = params.merge(:exclude => more_url_params["exclude_place_ids"].first)
+    @more_params = params
+                   .permit(:query, :minlon, :minlat, :maxlon, :maxlat, :exclude)
+                   .merge(:exclude => results.attributes["exclude_place_ids"])

 
     # parse the response
     results.elements.each("place") do |place|
 
     # parse the response
     results.elements.each("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(",")
+      lat = place.attributes["lat"]
+      lon = place.attributes["lon"]
+      klass = place.attributes["class"]
+      type = place.attributes["type"]
+      name = place.attributes["display_name"]
+      min_lat, max_lat, min_lon, max_lon = place.attributes["boundingbox"].split(",")

       prefix_name = if type.empty?
                       ""
                     else
                       t "geocoder.search_osm_nominatim.prefix.#{klass}.#{type}", :default => type.tr("_", " ").capitalize
                     end
       if klass == "boundary" && type == "administrative"
       prefix_name = if type.empty?
                       ""
                     else
                       t "geocoder.search_osm_nominatim.prefix.#{klass}.#{type}", :default => type.tr("_", " ").capitalize
                     end
       if klass == "boundary" && type == "administrative"

-        rank = (place.attributes["place_rank"].to_i + 1) / 2
+        rank = (place.attributes["address_rank"].to_i + 1) / 2

         prefix_name = t "geocoder.search_osm_nominatim.admin_levels.level#{rank}", :default => prefix_name
         place.elements["extratags"].elements.each("tag") do |extratag|
         prefix_name = t "geocoder.search_osm_nominatim.admin_levels.level#{rank}", :default => prefix_name
         place.elements["extratags"].elements.each("tag") do |extratag|

-          if extratag.attributes["key"] == "place"
-            prefix_name = t "geocoder.search_osm_nominatim.prefix.place.#{extratag.attributes['value']}", :default => prefix_name
-          end
+          prefix_name = t "geocoder.search_osm_nominatim.prefix.place.#{extratag.attributes['value']}", :default => prefix_name if extratag.attributes["key"] == "linked_place" || extratag.attributes["key"] == "place"

         end
       end
         end
       end

-      prefix = t "geocoder.search_osm_nominatim.prefix_format", :name => prefix_name
+      prefix = t ".prefix_format", :name => prefix_name

       object_type = place.attributes["osm_type"]
       object_id = place.attributes["osm_id"]
 
       object_type = place.attributes["osm_type"]
       object_id = place.attributes["osm_id"]
 


@@ -196,61 +117,29 @@ class GeocoderController < ApplicationController
     end
 
     render :action => "results"
     end
 
     render :action => "results"

-  rescue StandardError => ex
-    @error = "Error contacting nominatim.openstreetmap.org: #{ex}"
-    render :action => "error"
-  end
-
-  def search_geonames
-    # get query parameters
-    query = params[:query]
-
-    # get preferred language
-    lang = I18n.locale.to_s.split("-").first
-
-    # create result array
-    @results = []
-
-    # ask geonames.org
-    response = fetch_xml("http://api.geonames.org/search?q=#{escape_query(query)}&lang=#{lang}&maxRows=20&username=#{GEONAMES_USERNAME}")
-
-    # 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 => GEONAMES_ZOOM,
-                    :name => name,
-                    :suffix => ", #{country}")
-    end
-
-    render :action => "results"
-  rescue StandardError => ex
-    @error = "Error contacting api.geonames.org: #{ex}"
+  rescue StandardError => e
+    host = URI(Settings.nominatim_url).host
+    @error = "Error contacting #{host}: #{e}"

     render :action => "error"
   end
 
   def search_osm_nominatim_reverse
     # get query parameters
     render :action => "error"
   end
 
   def search_osm_nominatim_reverse
     # get query parameters

-    lat = params[:lat]
-    lon = params[:lon]

     zoom = params[:zoom]
 
     # create result array
     @results = []
 
     # ask nominatim
     zoom = params[:zoom]
 
     # create result array
     @results = []
 
     # ask nominatim

-    response = fetch_xml("http:#{NOMINATIM_URL}reverse?lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
+    response = fetch_xml(nominatim_reverse_url(:format => "xml"))

 
     # parse the response
     response.elements.each("reversegeocode/result") do |result|
 
     # parse the response
     response.elements.each("reversegeocode/result") do |result|

-      lat = result.attributes["lat"].to_s
-      lon = result.attributes["lon"].to_s
+      lat = result.attributes["lat"]
+      lon = result.attributes["lon"]

       object_type = result.attributes["osm_type"]
       object_id = result.attributes["osm_id"]
       object_type = result.attributes["osm_type"]
       object_id = result.attributes["osm_id"]

-      description = result.get_text.to_s
+      description = result.text

 
       @results.push(:lat => lat, :lon => lon,
                     :zoom => zoom,
 
       @results.push(:lat => lat, :lon => lon,
                     :zoom => zoom,


@@ -259,43 +148,42 @@ class GeocoderController < ApplicationController
     end
 
     render :action => "results"
     end
 
     render :action => "results"

-  rescue StandardError => ex
-    @error = "Error contacting nominatim.openstreetmap.org: #{ex}"
+  rescue StandardError => e
+    host = URI(Settings.nominatim_url).host
+    @error = "Error contacting #{host}: #{e}"

     render :action => "error"
   end
 
     render :action => "error"
   end
 

-  def search_geonames_reverse
+  private
+
+  def nominatim_url(format: nil)

     # get query parameters
     # get query parameters

-    lat = params[:lat]
-    lon = params[:lon]
+    query = params[:query]
+    minlon = params[:minlon]
+    minlat = params[:minlat]
+    maxlon = params[:maxlon]
+    maxlat = params[:maxlat]

 
 

-    # get preferred language
-    lang = I18n.locale.to_s.split("-").first
+    # get view box
+    viewbox = "&viewbox=#{minlon},#{maxlat},#{maxlon},#{minlat}" if minlon && minlat && maxlon && maxlat

 
 

-    # create result array
-    @results = []
+    # get objects to excude
+    exclude = "&exclude_place_ids=#{params[:exclude]}" if params[:exclude]

 
 

-    # ask geonames.org
-    response = fetch_xml("http://api.geonames.org/countrySubdivision?lat=#{lat}&lng=#{lon}&lang=#{lang}&username=#{GEONAMES_USERNAME}")
+    # build url
+    "#{Settings.nominatim_url}search?format=#{format}&extratags=1&q=#{escape_query(query)}#{viewbox}#{exclude}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}"
+  end

 
 

-    # 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(:lat => lat, :lon => lon,
-                    :zoom => GEONAMES_ZOOM,
-                    :name => name,
-                    :suffix => ", #{country}")
-    end
+  def nominatim_reverse_url(format: nil)
+    # get query parameters
+    lat = params[:lat]
+    lon = params[:lon]
+    zoom = params[:zoom]

 
 

-    render :action => "results"
-  rescue StandardError => ex
-    @error = "Error contacting api.geonames.org: #{ex}"
-    render :action => "error"
+    # build url
+    "#{Settings.nominatim_url}reverse?format=#{format}&lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}"

   end
 
   end
 

-  private
-

   def fetch_text(url)
     response = OSM.http_client.get(URI.parse(url))
 
   def fetch_text(url)
     response = OSM.http_client.get(URI.parse(url))
 


@@ -311,69 +199,49 @@ class GeocoderController < ApplicationController
   end
 
   def escape_query(query)
   end
 
   def escape_query(query)

-    URI.escape(query, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]", false, "N"))
+    CGI.escape(query)

   end
 
   def normalize_params
     if query = params[:query]
       query.strip!
 
   end
 
   def normalize_params
     if query = params[:query]
       query.strip!
 

-      if latlon = query.match(/^([NS])\s*(\d{1,3}(\.\d*)?)\W*([EW])\s*(\d{1,3}(\.\d*)?)$/).try(:captures) # [NSEW] decimal degrees
-        params.merge!(nsew_to_decdeg(latlon)).delete(:query)
-      elsif latlon = query.match(/^(\d{1,3}(\.\d*)?)\s*([NS])\W*(\d{1,3}(\.\d*)?)\s*([EW])$/).try(:captures) # decimal degrees [NSEW]
-        params.merge!(nsew_to_decdeg(latlon)).delete(:query)
+      if latlon = query.match(/^(?<ns>[NS])\s*#{dms_regexp('ns')}\W*(?<ew>[EW])\s*#{dms_regexp('ew')}$/) ||
+                  query.match(/^#{dms_regexp('ns')}\s*(?<ns>[NS])\W*#{dms_regexp('ew')}\s*(?<ew>[EW])$/)
+        params.merge!(to_decdeg(latlon.named_captures.compact)).delete(:query)

 
 

-      elsif latlon = query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?$/).try(:captures) # [NSEW] degrees, decimal minutes
-        params.merge!(ddm_to_decdeg(latlon)).delete(:query)
-      elsif latlon = query.match(/^(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\s*([NS])\W*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\s*([EW])$/).try(:captures) # degrees, decimal minutes [NSEW]
-        params.merge!(ddm_to_decdeg(latlon)).delete(:query)
+      elsif latlon = query.match(%r{^(?<lat>[+-]?\d+(?:\.\d+)?)(?:\s+|\s*[,/]\s*)(?<lon>[+-]?\d+(?:\.\d+)?)$})
+        params.merge!(:lat => latlon["lat"], :lon => latlon["lon"]).delete(:query)

 
 

-      elsif latlon = query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?$/).try(:captures) # [NSEW] degrees, minutes, decimal seconds
-        params.merge!(dms_to_decdeg(latlon)).delete(:query)
-      elsif latlon = query.match(/^(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]\s*([NS])\W*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?\s*([EW])$/).try(:captures) # degrees, minutes, decimal seconds [NSEW]
-        params.merge!(dms_to_decdeg(latlon)).delete(:query)
-
-      elsif latlon = query.match(/^\s*([+-]?\d+(\.\d*)?)\s*[\s,]\s*([+-]?\d+(\.\d*)?)\s*$/)
-        params.merge!(:lat => latlon[1].to_f, :lon => latlon[3].to_f).delete(:query)
+        params[:latlon_digits] = true

       end
     end
 
       end
     end
 

-    params.permit(:query, :lat, :lon, :zoom, :minlat, :minlon, :maxlat, :maxlon)
+    params.permit(:query, :lat, :lon, :latlon_digits, :zoom, :minlat, :minlon, :maxlat, :maxlon)

   end
 
   end
 

-  def nsew_to_decdeg(captures)
-    begin
-      Float(captures[0])
-      lat = !captures[2].casecmp("s").zero? ? captures[0].to_f : -captures[0].to_f
-      lon = !captures[5].casecmp("w").zero? ? captures[3].to_f : -captures[3].to_f
-    rescue
-      lat = !captures[0].casecmp("s").zero? ? captures[1].to_f : -captures[1].to_f
-      lon = !captures[3].casecmp("w").zero? ? captures[4].to_f : -captures[4].to_f
-    end
-    { :lat => lat, :lon => lon }
+  def dms_regexp(name_prefix)
+    /
+      (?: (?<#{name_prefix}d>\d{1,3}(?:\.\d+)?)°? ) |
+      (?: (?<#{name_prefix}d>\d{1,3})°?\s*(?<#{name_prefix}m>\d{1,2}(?:\.\d+)?)['′]? ) |
+      (?: (?<#{name_prefix}d>\d{1,3})°?\s*(?<#{name_prefix}m>\d{1,2})['′]?\s*(?<#{name_prefix}s>\d{1,2}(?:\.\d+)?)["″]? )
+    /x

   end
 
   end
 

-  def ddm_to_decdeg(captures)
-    begin
-      Float(captures[0])
-      lat = !captures[3].casecmp("s").zero? ? captures[0].to_f + captures[1].to_f / 60 : -(captures[0].to_f + captures[1].to_f / 60)
-      lon = !captures[7].casecmp("w").zero? ? captures[4].to_f + captures[5].to_f / 60 : -(captures[4].to_f + captures[5].to_f / 60)
-    rescue
-      lat = !captures[0].casecmp("s").zero? ? captures[1].to_f + captures[2].to_f / 60 : -(captures[1].to_f + captures[2].to_f / 60)
-      lon = !captures[4].casecmp("w").zero? ? captures[5].to_f + captures[6].to_f / 60 : -(captures[5].to_f + captures[6].to_f / 60)
-    end
-    { :lat => lat, :lon => lon }
-  end
+  def to_decdeg(captures)
+    ns = captures.fetch("ns").casecmp?("s") ? -1 : 1
+    nsd = BigDecimal(captures.fetch("nsd", "0"))
+    nsm = BigDecimal(captures.fetch("nsm", "0"))
+    nss = BigDecimal(captures.fetch("nss", "0"))

 
 

-  def dms_to_decdeg(captures)
-    begin
-      Float(captures[0])
-      lat = !captures[4].casecmp("s").zero? ? captures[0].to_f + (captures[1].to_f + captures[2].to_f / 60) / 60 : -(captures[0].to_f + (captures[1].to_f + captures[2].to_f / 60) / 60)
-      lon = !captures[9].casecmp("w").zero? ? captures[5].to_f + (captures[6].to_f + captures[7].to_f / 60) / 60 : -(captures[5].to_f + (captures[6].to_f + captures[7].to_f / 60) / 60)
-    rescue
-      lat = !captures[0].casecmp("s").zero? ? captures[1].to_f + (captures[2].to_f + captures[3].to_f / 60) / 60 : -(captures[1].to_f + (captures[2].to_f + captures[3].to_f / 60) / 60)
-      lon = !captures[5].casecmp("w").zero? ? captures[6].to_f + (captures[7].to_f + captures[8].to_f / 60) / 60 : -(captures[6].to_f + (captures[7].to_f + captures[8].to_f / 60) / 60)
-    end
-    { :lat => lat, :lon => lon }
+    ew = captures.fetch("ew").casecmp?("w") ? -1 : 1
+    ewd = BigDecimal(captures.fetch("ewd", "0"))
+    ewm = BigDecimal(captures.fetch("ewm", "0"))
+    ews = BigDecimal(captures.fetch("ews", "0"))
+
+    lat = ns * (nsd + (nsm / 60) + (nss / 3600))
+    lon = ew * (ewd + (ewm / 60) + (ews / 3600))
+
+    { :lat => lat.round(6).to_s("F"), :lon => lon.round(6).to_s("F") }

   end
 end
   end
 end