397 lines
13 KiB
Ruby
397 lines
13 KiB
Ruby
class GeocoderController < ApplicationController
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require 'uri'
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require 'net/http'
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require 'rexml/document'
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before_filter :authorize_web
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before_filter :set_locale
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def search
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@query = params[:query]
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@sources = Array.new
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@query.sub(/^\s+/, "")
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@query.sub(/\s+$/, "")
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if @query.match(/^[+-]?\d+(\.\d*)?\s*[\s,]\s*[+-]?\d+(\.\d*)?$/)
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@sources.push "latlon"
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elsif @query.match(/^\d{5}(-\d{4})?$/)
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@sources.push "us_postcode"
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elsif @query.match(/^(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])\s*[0-9][ABD-HJLNP-UW-Z]{2})$/i)
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@sources.push "uk_postcode"
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@sources.push "osm_namefinder"
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@sources.push "osm_twain" if APP_CONFIG['twain_enabled']
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elsif @query.match(/^[A-Z]\d[A-Z]\s*\d[A-Z]\d$/i)
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@sources.push "ca_postcode"
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else
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@sources.push "osm_namefinder"
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@sources.push "osm_twain" if APP_CONFIG['twain_enabled']
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@sources.push "geonames"
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end
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render :update do |page|
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page.replace_html :sidebar_content, :partial => "search"
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page.call "openSidebar"
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end
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end
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def search_latlon
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# get query parameters
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query = params[:query]
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# create result array
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@results = Array.new
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# decode the location
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if m = query.match(/^\s*([+-]?\d+(\.\d*)?)\s*[\s,]\s*([+-]?\d+(\.\d*)?)\s*$/)
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lat = m[1].to_f
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lon = m[3].to_f
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end
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# generate results
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if lat < -90 or lat > 90
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@error = "Latitude #{lat} out of range"
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render :action => "error"
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elsif lon < -180 or lon > 180
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@error = "Longitude #{lon} out of range"
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render :action => "error"
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else
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@results.push({:lat => lat, :lon => lon,
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:zoom => APP_CONFIG['postcode_zoom'],
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:name => "#{lat}, #{lon}"})
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render :action => "results"
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end
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end
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def search_us_postcode
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# get query parameters
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query = params[:query]
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# create result array
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@results = Array.new
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# ask geocoder.us (they have a non-commercial use api)
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response = fetch_text("http://rpc.geocoder.us/service/csv?zip=#{escape_query(query)}")
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# parse the response
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unless response.match(/couldn't find this zip/)
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data = response.split(/\s*,\s+/) # lat,long,town,state,zip
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@results.push({:lat => data[0], :lon => data[1],
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:zoom => APP_CONFIG['postcode_zoom'],
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:prefix => "#{data[2]}, #{data[3]},",
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:name => data[4]})
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end
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render :action => "results"
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rescue Exception => ex
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@error = "Error contacting rpc.geocoder.us: #{ex.to_s}"
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render :action => "error"
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end
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def search_uk_postcode
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# get query parameters
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query = params[:query]
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# create result array
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@results = Array.new
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# ask npemap.org.uk to do a combined npemap + freethepostcode search
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response = fetch_text("http://www.npemap.org.uk/cgi/geocoder.fcgi?format=text&postcode=#{escape_query(query)}")
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# parse the response
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unless response.match(/Error/)
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dataline = response.split(/\n/)[1]
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data = dataline.split(/,/) # easting,northing,postcode,lat,long
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postcode = data[2].gsub(/'/, "")
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zoom = APP_CONFIG['postcode_zoom'] - postcode.count("#")
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@results.push({:lat => data[3], :lon => data[4], :zoom => zoom,
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:name => postcode})
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end
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render :action => "results"
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rescue Exception => ex
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@error = "Error contacting www.npemap.org.uk: #{ex.to_s}"
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render :action => "error"
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end
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def search_ca_postcode
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# get query parameters
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query = params[:query]
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@results = Array.new
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# ask geocoder.ca (note - they have a per-day limit)
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response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{escape_query(query)}")
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# parse the response
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if response.get_elements("geodata/error").empty?
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@results.push({:lat => response.get_text("geodata/latt").to_s,
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:lon => response.get_text("geodata/longt").to_s,
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:zoom => APP_CONFIG['postcode_zoom'],
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:name => query.upcase})
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end
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render :action => "results"
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rescue Exception => ex
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@error = "Error contacting geocoder.ca: #{ex.to_s}"
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render :action => "error"
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end
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def search_osm_namefinder
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# get query parameters
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query = params[:query]
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# create result array
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@results = Array.new
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# ask OSM namefinder
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response = fetch_xml("http://gazetteer.openstreetmap.org/namefinder/search.xml?find=#{escape_query(query)}")
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# parse the response
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response.elements.each("searchresults/named") do |named|
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lat = named.attributes["lat"].to_s
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lon = named.attributes["lon"].to_s
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zoom = named.attributes["zoom"].to_s
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place = named.elements["place/named"] || named.elements["nearestplaces/named"]
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type = named.attributes["info"].to_s.capitalize
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name = named.attributes["name"].to_s
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description = named.elements["description"].to_s
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if name.empty?
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prefix = ""
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name = type
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else
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prefix = t "geocoder.search_osm_namefinder.prefix", :type => type
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end
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if place
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distance = format_distance(place.attributes["approxdistance"].to_i)
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direction = format_direction(place.attributes["direction"].to_i)
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placename = format_name(place.attributes["name"].to_s)
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suffix = t "geocoder.search_osm_namefinder.suffix_place", :distance => distance, :direction => direction, :placename => placename
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if place.attributes["rank"].to_i <= 30
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parent = nil
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parentrank = 0
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parentscore = 0
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place.elements.each("nearestplaces/named") do |nearest|
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nearestrank = nearest.attributes["rank"].to_i
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nearestscore = nearestrank / nearest.attributes["distance"].to_f
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if nearestrank > 30 and
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( nearestscore > parentscore or
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( nearestscore == parentscore and nearestrank > parentrank ) )
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parent = nearest
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parentrank = nearestrank
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parentscore = nearestscore
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end
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end
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if parent
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parentname = format_name(parent.attributes["name"].to_s)
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if place.attributes["info"].to_s == "suburb"
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suffix = t "geocoder.search_osm_namefinder.suffix_suburb", :suffix => suffix, :parentname => parentname
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else
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parentdistance = format_distance(parent.attributes["approxdistance"].to_i)
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parentdirection = format_direction(parent.attributes["direction"].to_i)
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suffix = t "geocoder.search_osm_namefinder.suffix_parent", :suffix => suffix, :parentdistance => parentdistance, :parentdirection => parentdirection, :parentname => parentname
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end
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end
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end
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else
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suffix = ""
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end
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@results.push({:lat => lat, :lon => lon, :zoom => zoom,
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:prefix => prefix, :name => name, :suffix => suffix,
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:description => description})
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end
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render :action => "results"
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rescue Exception => ex
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@error = "Error contacting gazetteer.openstreetmap.org: #{ex.to_s}"
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render :action => "error"
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end
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def search_osm_twain
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# get query parameters
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query = params[:query]
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# create result array
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@results = Array.new
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# ask OSM namefinder
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response = fetch_xml("http://katie.openstreetmap.org/~twain/?format=xml&q=#{escape_query(query)}")
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# parse the response
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response.elements.each("searchresults/place") do |place|
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lat = place.attributes["lat"].to_s
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lon = place.attributes["lon"].to_s
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zoom = place.attributes["zoom"].to_s
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klass = place.attributes["class"].to_s
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type = place.attributes["type"].to_s
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name = place.attributes["display_name"].to_s
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if klass == "highway"
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prefix = t 'geocoder.search_osm_twain.prefix_highway', :type => type.capitalize
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else
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prefix = t 'geocoder.search_osm_twain.prefix_other', :type => type.capitalize
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end
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@results.push({:lat => lat, :lon => lon, :zoom => zoom,
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:prefix => prefix, :name => name})
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end
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render :action => "results"
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rescue Exception => ex
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@error = "Error contacting katie.openstreetmap.org: #{ex.to_s}"
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render :action => "error"
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end
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def search_geonames
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# get query parameters
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query = params[:query]
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# create result array
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@results = Array.new
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# ask geonames.org
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response = fetch_xml("http://ws.geonames.org/search?q=#{escape_query(query)}&maxRows=20")
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# parse the response
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response.elements.each("geonames/geoname") do |geoname|
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lat = geoname.get_text("lat").to_s
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lon = geoname.get_text("lng").to_s
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name = geoname.get_text("name").to_s
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country = geoname.get_text("countryName").to_s
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@results.push({:lat => lat, :lon => lon,
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:zoom => APP_CONFIG['geonames_zoom'],
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:name => name,
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:suffix => ", #{country}"})
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end
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render :action => "results"
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rescue Exception => ex
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@error = "Error contacting ws.geonames.org: #{ex.to_s}"
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render :action => "error"
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end
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def description
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@sources = Array.new
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@sources.push({ :name => "osm_namefinder", :types => "cities", :max => 2 })
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@sources.push({ :name => "osm_namefinder", :types => "towns", :max => 4 })
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@sources.push({ :name => "osm_namefinder", :types => "places", :max => 10 })
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@sources.push({ :name => "geonames" })
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render :update do |page|
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page.replace_html :sidebar_content, :partial => "description"
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page.call "openSidebar"
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end
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end
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def description_osm_namefinder
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# get query parameters
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lat = params[:lat]
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lon = params[:lon]
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types = params[:types]
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max = params[:max]
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# create result array
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@results = Array.new
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# ask OSM namefinder
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response = fetch_xml("http://gazetteer.openstreetmap.org/namefinder/search.xml?find=#{types}+near+#{lat},#{lon}&max=#{max}")
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# parse the response
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response.elements.each("searchresults/named") do |named|
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lat = named.attributes["lat"].to_s
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lon = named.attributes["lon"].to_s
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zoom = named.attributes["zoom"].to_s
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place = named.elements["place/named"] || named.elements["nearestplaces/named"]
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type = named.attributes["info"].to_s
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name = named.attributes["name"].to_s
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description = named.elements["description"].to_s
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distance = format_distance(place.attributes["approxdistance"].to_i)
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direction = format_direction((place.attributes["direction"].to_i - 180) % 360)
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prefix = t "geocoder.description_osm_namefinder.prefix", :distance => distance, :direction => direction, :type => type
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@results.push({:lat => lat, :lon => lon, :zoom => zoom,
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:prefix => prefix.capitalize, :name => name,
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:description => description})
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end
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render :action => "results"
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rescue Exception => ex
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@error = "Error contacting gazetteer.openstreetmap.org: #{ex.to_s}"
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render :action => "error"
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end
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def description_geonames
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# get query parameters
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lat = params[:lat]
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lon = params[:lon]
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# create result array
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@results = Array.new
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# ask geonames.org
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response = fetch_xml("http://ws.geonames.org/countrySubdivision?lat=#{lat}&lng=#{lon}")
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# parse the response
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response.elements.each("geonames/countrySubdivision") do |geoname|
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name = geoname.get_text("adminName1").to_s
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country = geoname.get_text("countryName").to_s
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@results.push({:prefix => "#{name}, #{country}"})
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end
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render :action => "results"
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rescue Exception => ex
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@error = "Error contacting ws.geonames.org: #{ex.to_s}"
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render :action => "error"
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end
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private
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def fetch_text(url)
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return Net::HTTP.get(URI.parse(url))
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end
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def fetch_xml(url)
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return REXML::Document.new(fetch_text(url))
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end
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def format_distance(distance)
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return t("geocoder.distance", :count => distance)
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end
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def format_direction(bearing)
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return t("geocoder.direction.south_west") if bearing >= 22.5 and bearing < 67.5
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return t("geocoder.direction.south") if bearing >= 67.5 and bearing < 112.5
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return t("geocoder.direction.south_east") if bearing >= 112.5 and bearing < 157.5
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return t("geocoder.direction.east") if bearing >= 157.5 and bearing < 202.5
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return t("geocoder.direction.north_east") if bearing >= 202.5 and bearing < 247.5
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return t("geocoder.direction.north") if bearing >= 247.5 and bearing < 292.5
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return t("geocoder.direction.north_west") if bearing >= 292.5 and bearing < 337.5
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return t("geocoder.direction.west")
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end
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def format_name(name)
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return name.gsub(/( *\[[^\]]*\])*$/, "")
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end
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def count_results(results)
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count = 0
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results.each do |source|
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count += source[:results].length if source[:results]
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end
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return count
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end
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def escape_query(query)
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return URI.escape(query, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]", false, 'N'))
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end
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end
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