class GeocoderController < ApplicationController
+ require "cgi"
+ require "uri"
+ require "rexml/document"
- require 'net/http'
- require 'rexml/document'
+ before_action :authorize_web
+ before_action :set_locale
+ before_action :require_oauth, :only => [:search]
+ authorize_resource :class => false
def search
- @res_hash = {}
- @postcode_arr = []
-
-
- 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|
- ele.elements.each("name"){ |n| @res_hash['name'] = n.text }
- ele.elements.each("countryCode"){ |n| @res_hash['country'] = n.text }
- ele.elements.each("lat"){ |n| @res_hash['lat'] = n.text }
- ele.elements.each("lng"){ |n| @res_hash['lon']= n.text }
+ @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
+ render :layout => map_layout
+ end
+ end
+
+ def search_latlon
+ lat = params[:lat].to_f
+ lon = params[:lon].to_f
+
+ if params[:latlon_digits]
+ # We've got two nondescript numbers for a query, which can mean both "lat, lon" or "lon, lat".
+ @results = []
+
+ 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
+
+ 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
+
+ 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 :action => "results"
+ end
+ end
+ end
+
+ def search_osm_nominatim
+ # ask nominatim
+ response = fetch_xml(nominatim_url(:format => "xml"))
+
+ # extract the results from the response
+ results = response.elements["searchresults"]
+
+ # create result array
+ @results = []
+
+ # 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
+ 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
-
- if params[:query][:postcode]
- postcode = params[:query][:postcode]
- Net::HTTP.start('www.freethepostcode.org') do |http|
- unless resp.code ~ /^2*/
- resp = http.get("/geocode?postcode=#{postcode}")
- lat = resp.body.scan(/[4-6][0-9]\.?[0-9]+/)
- lon = resp.body.scan(/[-+][0-9]\.?[0-9]+/)
- @postcode_array = [lat, lon]
- else
+
+ render :action => "results"
+ 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
+ zoom = params[:zoom]
+
+ # create result array
+ @results = []
+
+ # ask nominatim
+ response = fetch_xml(nominatim_reverse_url(:format => "xml"))
+
+ # parse the response
+ 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
+
+ render :action => "results"
+ rescue StandardError => e
+ host = URI(Settings.nominatim_url).host
+ @error = "Error contacting #{host}: #{e}"
+ render :action => "error"
+ end
+
+ private
+
+ def nominatim_url(format: nil)
+ # get query parameters
+ query = params[:query]
+ minlon = params[:minlon]
+ minlat = params[:minlat]
+ maxlon = params[:maxlon]
+ maxlat = params[:maxlat]
+
+ # get view box
+ viewbox = "&viewbox=#{minlon},#{maxlat},#{maxlon},#{minlat}" if minlon && minlat && maxlon && maxlat
+
+ # get objects to excude
+ exclude = "&exclude_place_ids=#{params[:exclude]}" if params[:exclude]
+
+ # 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
+
+ def nominatim_reverse_url(format: nil)
+ # get query parameters
+ lat = params[:lat]
+ lon = params[:lon]
+ zoom = params[:zoom]
+
+ # build url
+ "#{Settings.nominatim_url}reverse?format=#{format}&lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}"
+ end
+
+ def fetch_text(url)
+ response = OSM.http_client.get(URI.parse(url))
+
+ if response.success?
+ response.body
+ else
+ raise response.status.to_s
+ end
+ end
+
+ def fetch_xml(url)
+ REXML::Document.new(fetch_text(url))
+ end
+
+ def escape_query(query)
+ CGI.escape(query)
+ end
+
+ def normalize_params
+ if query = params[:query]
+ query.strip!
+
+ 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(%r{^(?<lat>[+-]?\d+(?:\.\d+)?)(?:\s+|\s*[,/]\s*)(?<lon>[+-]?\d+(?:\.\d+)?)$})
+ params.merge!(:lat => latlon["lat"], :lon => latlon["lon"]).delete(:query)
+
+ params[:latlon_digits] = true
end
- redirect_to "/index.html?lat=#{@postcode_array[0]}&lon=#{@postcode_array[1]}&zoom=14"
end
+
+ params.permit(:query, :lat, :lon, :latlon_digits, :zoom, :minlat, :minlon, :maxlat, :maxlon)
+ end
+
+ 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
+
+ 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"))
+
+ 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
projects / rails.git / blobdiff