Add update block ability with conditions

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

diff --git a/app/controllers/geocoder_controller.rb b/app/controllers/geocoder_controller.rb
index a4c264a93791885454454684b7c71b0a7f70a83e..43f276efa020a35cfdbb1719155c4a3f5e61c1fe 100644 (file)
--- a/app/controllers/geocoder_controller.rb
+++ b/app/controllers/geocoder_controller.rb
@@ -1,261 +1,247 @@
 class GeocoderController < ApplicationController
 class GeocoderController < ApplicationController

-  require 'uri'
-  require 'net/http'
-  require 'rexml/document'
+  require "cgi"
+  require "uri"
+  require "rexml/document"

 
 

-  POSTCODE_ZOOM = 15
-  GEONAMES_ZOOM = 12
+  before_action :authorize_web
+  before_action :set_locale
+  before_action :require_oauth, :only => [:search]
+  authorize_resource :class => false

 
   def search
 
   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)
-      results.push search_osm_namefinder(query)
-    elsif query.match(/[A-Z]\d[A-Z]\s*\d[A-Z]\d/i)
-      results.push search_ca_postcode(query)
+    @params = normalize_params
+    @sources = []
+
+    if @params[:lat] && @params[:lon]
+      @sources.push(:name => "latlon", :url => root_path)
+      @sources.push(:name => "osm_nominatim_reverse", :url => nominatim_reverse_url(:format => "html"))
+    elsif @params[:query]
+      @sources.push(:name => "osm_nominatim", :url => nominatim_url(:format => "html"))
+    end
+
+    if @sources.empty?
+      head :bad_request

     else
     else

-      results.push search_osm_namefinder(query)
-      results.push search_geonames(query)
+      render :layout => map_layout

     end
     end

+  end

 
 

-    results_count = count_results(results)
+  def search_latlon
+    lat = params[:lat].to_f
+    lon = params[:lon].to_f

 
 

-    render :update do |page|
-      page.replace_html :sidebar_content, :partial => 'results', :object => results
+    if params[:latlon_digits]
+      # We've got two nondescript numbers for a query, which can mean both "lat, lon" or "lon, lat".
+      @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 "openSidebar"
+      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
       end

-    end
-  end
-  
-  def description
-    results = Array.new

 
 

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

 
 

-    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)
+      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]}" }]

 
 

-    render :update do |page|
-      page.replace_html :sidebar_content, :partial => 'results', :object => results
-      page.call "openSidebar"
+        render :action => "results"
+      end

     end
   end
 
     end
   end
 

-private
+  def search_osm_nominatim
+    # ask nominatim
+    response = fetch_xml(nominatim_url(:format => "xml"))

 
 

-  def search_us_postcode(query)
-    results = Array.new
+    # extract the results from the response
+    results = response.elements["searchresults"]

 
 

-    # ask geocoder.us (they have a non-commercial use api)
-    response = fetch_text("http://rpc.geocoder.us/service/csv?zip=#{escape_query(query)}")
+    # create result array
+    @results = []

 
 

-    # 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,
-                    :prefix => "#{data[2]}, #{data[3]}, ",
-                    :name => data[4]})
-    end
-
-    return { :source => "Geocoder.us", :url => "http://geocoder.us/", :results => results }
-  rescue Exception => ex
-    return { :source => "Geocoder.us", :url => "http://geocoder.us/", :error => "Error contacting rpc.geocoder.us: #{ex.to_s}" }
-  end
-
-  def search_uk_postcode(query)
-    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)}")
+    # create parameter hash for "more results" link
+    @more_params = params
+                   .permit(:query, :minlon, :minlat, :maxlon, :maxlat, :exclude)
+                   .merge(:exclude => results.attributes["exclude_place_ids"])

 
     # parse the response
 
     # 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 = POSTCODE_ZOOM - postcode.count("#")
-      results.push({:lat => data[3], :lon => data[4], :zoom => zoom,
-                    :name => postcode})
+    results.elements.each("place") do |place|
+      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"
+        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.prefix.place.#{extratag.attributes['value']}", :default => prefix_name if extratag.attributes["key"] == "linked_place" || extratag.attributes["key"] == "place"
+        end
+      end
+      prefix = t ".prefix_format", :name => prefix_name
+      object_type = place.attributes["osm_type"]
+      object_id = place.attributes["osm_id"]
+
+      @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,
+                    :type => object_type, :id => object_id)

     end
 
     end
 

-    return { :source => "NPEMap / FreeThePostcode", :url => "http://www.npemap.org.uk/", :results => results }
-  rescue Exception => ex
-    return { :source => "NPEMap / FreeThePostcode", :url => "http://www.npemap.org.uk/", :error => "Error contacting www.npemap.org.uk: #{ex.to_s}" }
+    render :action => "results"
+  rescue StandardError => e
+    host = URI(Settings.nominatim_url).host
+    @error = "Error contacting #{host}: #{e}"
+    render :action => "error"

   end
 
   end
 

-  def search_ca_postcode(query)
-    results = Array.new
+  def search_osm_nominatim_reverse
+    # get query parameters
+    zoom = params[:zoom]

 
 

-    # ask geocoder.ca (note - they have a per-day limit)
-    response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{escape_query(query)}")
+    # create result array
+    @results = []
+
+    # ask nominatim
+    response = fetch_xml(nominatim_reverse_url(:format => "xml"))

 
     # parse the response
 
     # 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 => POSTCODE_ZOOM,
-                    :name => query.upcase})
+    response.elements.each("reversegeocode/result") do |result|
+      lat = result.attributes["lat"]
+      lon = result.attributes["lon"]
+      object_type = result.attributes["osm_type"]
+      object_id = result.attributes["osm_id"]
+      description = result.text
+
+      @results.push(:lat => lat, :lon => lon,
+                    :zoom => zoom,
+                    :name => description,
+                    :type => object_type, :id => object_id)

     end
 
     end
 

-    return { :source => "Geocoder.CA", :url => "http://geocoder.ca/", :results => results }
-  rescue Exception => ex
-    return { :source => "Geocoder.CA", :url => "http://geocoder.ca/", :error => "Error contacting geocoder.ca: #{ex.to_s}" }
+    render :action => "results"
+  rescue StandardError => e
+    host = URI(Settings.nominatim_url).host
+    @error = "Error contacting #{host}: #{e}"
+    render :action => "error"

   end
 
   end
 

-  def search_osm_namefinder(query)
-    results = Array.new
-
-    # ask OSM namefinder
-    response = fetch_xml("http://gazetteer.openstreetmap.org/namefinder/search.xml?find=#{escape_query(query)}")
+  private

 
 

-    # 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
-        prefix = "#{type} "
-      end
-      if place
-        distance = format_distance(place.attributes["approxdistance"].to_i)
-        direction = format_direction(place.attributes["direction"].to_i)
-        placename = place.attributes["name"].to_s
-        suffix = ", #{distance} #{direction} of #{placename}"
-      else
-        suffix = ""
-      end
-      results.push({:lat => lat, :lon => lon, :zoom => zoom,
-                    :prefix => prefix, :name => name, :suffix => suffix,
-                    :description => description})
-    end
+  def nominatim_url(format: nil)
+    # get query parameters
+    query = params[:query]
+    minlon = params[:minlon]
+    minlat = params[:minlat]
+    maxlon = params[:maxlon]
+    maxlat = params[:maxlat]

 
 

-    return { :source => "OpenStreetMap Namefinder", :url => "http://gazetteer.openstreetmap.org/namefinder/", :results => results }
-  rescue Exception => ex
-    return { :source => "OpenStreetMap Namefinder", :url => "http://gazetteer.openstreetmap.org/namefinder/", :error => "Error contacting gazetteer.openstreetmap.org: #{ex.to_s}" }
-  end
+    # get view box
+    viewbox = "&viewbox=#{minlon},#{maxlat},#{maxlon},#{minlat}" if minlon && minlat && maxlon && maxlat

 
 

-  def search_geonames(query)
-    results = Array.new
+    # get objects to excude
+    exclude = "&exclude_place_ids=#{params[:exclude]}" if params[:exclude]

 
 

-    # ask geonames.org
-    response = fetch_xml("http://ws.geonames.org/search?q=#{escape_query(query)}&maxRows=20")
+    # 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/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
+  def nominatim_reverse_url(format: nil)
+    # get query parameters
+    lat = params[:lat]
+    lon = params[:lon]
+    zoom = params[:zoom]

 
 

-    return { :source => "GeoNames", :url => "http://www.geonames.org/", :results => results }
-  rescue Exception => ex
-    return { :source => "GeoNames", :url => "http://www.geonames.org/", :error => "Error contacting ws.geonames.org: #{ex.to_s}" }
+    # 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
 

-  def description_osm_namefinder(types, lat, lon, max)
-    results = Array.new
-
-    # ask OSM namefinder
-    response = fetch_xml("http://gazetteer.openstreetmap.org/namefinder/search.xml?find=#{types}+near+#{lat},#{lon}&max=#{max}")
+  def fetch_text(url)
+    response = OSM.http_client.get(URI.parse(url))

 
 

-    # 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})
+    if response.success?
+      response.body
+    else
+      raise response.status.to_s

     end
     end

-
-    return { :type => types.capitalize, :source => "OpenStreetMap Namefinder", :url => "http://gazetteer.openstreetmap.org/namefinder/", :results => results }
-  rescue Exception => ex
-    return { :type => types.capitalize, :source => "OpenStreetMap Namefinder", :url => "http://gazetteer.openstreetmap.org/namefinder/", :error => "Error contacting gazetteer.openstreetmap.org: #{ex.to_s}" }

   end
 
   end
 

-  def description_geonames(lat, lon)
-    results = Array.new
+  def fetch_xml(url)
+    REXML::Document.new(fetch_text(url))
+  end

 
 

-    # ask geonames.org
-    response = fetch_xml("http://ws.geonames.org/countrySubdivision?lat=#{lat}&lng=#{lon}")
+  def escape_query(query)
+    CGI.escape(query)
+  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({:prefix => "#{name}, #{country}"})
-    end
+  def normalize_params
+    if query = params[:query]
+      query.strip!

 
 

-    return { :type => "Location", :source => "GeoNames", :url => "http://www.geonames.org/", :results => results }
-  rescue Exception => ex
-    return { :type => "Location", :source => "GeoNames", :url => "http://www.geonames.org/", :error => "Error contacting ws.geonames.org: #{ex.to_s}" }
-  end
+      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)

 
 

-  def fetch_text(url)
-    return Net::HTTP.get(URI.parse(url))
-  end
+      elsif latlon = query.match(%r{^(?<lat>[+-]?\d+(?:\.\d+)?)(?:\s+|\s*[,/]\s*)(?<lon>[+-]?\d+(?:\.\d+)?)$})
+        params.merge!(:lat => latlon["lat"], :lon => latlon["lon"]).delete(:query)

 
 

-  def fetch_xml(url)
-    return REXML::Document.new(fetch_text(url))
-  end
+        params[:latlon_digits] = true
+      end
+    end

 
 

-  def format_distance(distance)
-    return "less than 1km" if distance == 0
-    return "about #{distance}km"
+    params.permit(:query, :lat, :lon, :latlon_digits, :zoom, :minlat, :minlon, :maxlat, :maxlon)

   end
 
   end
 

-  def format_direction(bearing)
-    return "south-west" if bearing >= 22.5 and bearing < 67.5
-    return "south" if bearing >= 67.5 and bearing < 112.5
-    return "south-east" if bearing >= 112.5 and bearing < 157.5
-    return "east" if bearing >= 157.5 and bearing < 202.5
-    return "north-east" if bearing >= 202.5 and bearing < 247.5
-    return "north" if bearing >= 247.5 and bearing < 292.5
-    return "north-west" if bearing >= 292.5 and bearing < 337.5
-    return "west"
+  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 count_results(results)
-    count = 0
+  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"))

 
 

-    results.each do |source|
-      count += source[:results].length if source[:results]
-    end
+    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"))

 
 

-    return count
-  end
+    lat = ns * (nsd + (nsm / 60) + (nss / 3600))
+    lon = ew * (ewd + (ewm / 60) + (ews / 3600))

 
 

-  def escape_query(query)
-    return URI.escape(query, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]", false, 'N'))
+    { :lat => lat.round(6).to_s("F"), :lon => lon.round(6).to_s("F") }

   end
 end
   end
 end