253 lines
9.7 KiB
Ruby
253 lines
9.7 KiB
Ruby
class GeocoderController < ApplicationController
|
||
require "cgi"
|
||
require "uri"
|
||
require "rexml/document"
|
||
|
||
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]
|
||
@sources.push "latlon"
|
||
@sources.push "osm_nominatim_reverse"
|
||
elsif @params[:query]
|
||
@sources.push "osm_nominatim"
|
||
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 => lat, :lon => lon,
|
||
:zoom => params[:zoom],
|
||
:name => "#{lat}, #{lon}")
|
||
end
|
||
|
||
if lon >= -90 && lon <= 90 && lat >= -180 && lat <= 180
|
||
@results.push(:lat => lon, :lon => lat,
|
||
:zoom => params[:zoom],
|
||
:name => "#{lon}, #{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 => lat, :lon => lon,
|
||
:zoom => params[:zoom],
|
||
:name => "#{lat}, #{lon}" }]
|
||
|
||
render :action => "results"
|
||
end
|
||
end
|
||
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
|
||
viewbox = "&viewbox=#{minlon},#{maxlat},#{maxlon},#{minlat}" if minlon && minlat && maxlon && maxlat
|
||
|
||
# get objects to excude
|
||
exclude = "&exclude_place_ids=#{params[:exclude]}" if params[:exclude]
|
||
|
||
# ask nominatim
|
||
response = fetch_xml("#{Settings.nominatim_url}search?format=xml&extratags=1&q=#{escape_query(query)}#{viewbox}#{exclude}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
|
||
|
||
# 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
|
||
|
||
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
|
||
lat = params[:lat]
|
||
lon = params[:lon]
|
||
zoom = params[:zoom]
|
||
|
||
# create result array
|
||
@results = []
|
||
|
||
# ask nominatim
|
||
response = fetch_xml("#{Settings.nominatim_url}reverse?lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
|
||
|
||
# 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 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])\s*(\d{1,3}(\.\d*)?)\W*([EW])\s*(\d{1,3}(\.\d*)?)$/).try(:captures) || # [NSEW] decimal degrees
|
||
query.match(/^(\d{1,3}(\.\d*)?)\s*([NS])\W*(\d{1,3}(\.\d*)?)\s*([EW])$/).try(:captures) # decimal degrees [NSEW]
|
||
params.merge!(nsew_to_decdeg(latlon)).delete(:query)
|
||
|
||
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*)?)?['′]?)?$/).try(:captures) || # [NSEW] degrees, decimal minutes
|
||
query.match(/^(\d{1,3})°?(?:\s*(\d{1,3}(\.\d*)?)?['′]?)?\s*([NS])\W*(\d{1,3})°?(?:\s*(\d{1,3}(\.\d*)?)?['′]?)?\s*([EW])$/).try(:captures) # degrees, decimal minutes [NSEW]
|
||
params.merge!(ddm_to_decdeg(latlon)).delete(:query)
|
||
|
||
elsif latlon = query.match(/^([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*)?)?["″]?)?$/).try(:captures) || # [NSEW] degrees, minutes, decimal seconds
|
||
query.match(/^(\d{1,3})°?\s*(\d{1,2})['′]?(?:\s*(\d{1,3}(\.\d*)?)?["″]?)?\s*([NS])\W*(\d{1,3})°?\s*(\d{1,2})['′]?(?:\s*(\d{1,3}(\.\d*)?)?["″]?)?\s*([EW])$/).try(:captures) # degrees, minutes, decimal seconds [NSEW]
|
||
params.merge!(dms_to_decdeg(latlon)).delete(:query)
|
||
|
||
elsif latlon = query.match(/^([+-]?\d+(\.\d*)?)(?:\s+|\s*,\s*)([+-]?\d+(\.\d*)?)$/)
|
||
params.merge!(:lat => latlon[1].to_f, :lon => latlon[3].to_f).delete(:query)
|
||
|
||
params[:latlon_digits] = true unless params[:whereami]
|
||
end
|
||
end
|
||
|
||
params.permit(:query, :lat, :lon, :latlon_digits, :zoom, :minlat, :minlon, :maxlat, :maxlon)
|
||
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 StandardError
|
||
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 }
|
||
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 StandardError
|
||
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 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 StandardError
|
||
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 }
|
||
end
|
||
end
|