Simplify subscribe path helper calls

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

diff --git a/app/controllers/geocoder_controller.rb b/app/controllers/geocoder_controller.rb
index b04a71cdc361285512dc5e966a51149e5e19e663..43f276efa020a35cfdbb1719155c4a3f5e61c1fe 100644 (file)
--- a/app/controllers/geocoder_controller.rb
+++ b/app/controllers/geocoder_controller.rb
@@ -1,83 +1,247 @@
 class GeocoderController < ApplicationController
 class GeocoderController < ApplicationController

-  layout 'site'
+  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
 
   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}")
-          $stderr.print resp.body
-          $stderr.print resp.body.slice(/latt>.*?</)
-          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
+    @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
       else

-        # Some other postcode / zip file
-        redirect_to "/index.html?error=unknown_postcode_or_zip"
+        render :action => "results"

       end
     else
       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 
+      # 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
         end
       end

-      redirect_to :controller => 'geocoder', :action => 'results', :params => @res_ary
+      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

+
+    render :action => "results"
+  rescue StandardError => e
+    host = URI(Settings.nominatim_url).host
+    @error = "Error contacting #{host}: #{e}"
+    render :action => "error"

   end
 
   end
 

-  def result
-    @res = :params[@res_ary]
+  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
+    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
   end
 end