+# The OSM module provides support functions for OSM.
module OSM
+ require "time"
+ require "rexml/parsers/sax2parser"
+ require "rexml/text"
+ require "xml/libxml"
- # This piece of magic reads a GPX with SAX and spits out
- # lat/lng and stuff
- #
- # This would print every latitude value:
- #
- # gpx = OSM:GPXImporter.new('somefile.gpx')
- # gpx.points {|p| puts p['latitude']}
-
- require 'time'
- require 'rexml/parsers/sax2parser'
- require 'rexml/text'
-
- class GPXImporter
- attr_reader :possible_points
- attr_reader :tracksegs
-
- def initialize(filename)
- @filename = filename
- @possible_points = 0
- @tracksegs = 0
- end
-
- def points
- file = File.new(@filename)
- parser = REXML::Parsers::SAX2Parser.new( file )
-
- lat = -1
- lon = -1
- ele = -1
- date = Time.now();
- gotlatlon = false
- gotele = false
- gotdate = false
-
- parser.listen( :start_element, %w{ trkpt }) do |uri,localname,qname,attributes|
- lat = attributes['lat'].to_f
- lon = attributes['lon'].to_f
- gotlatlon = true
- @possible_points += 1
- end
+ # The base class for API Errors.
+ class APIError < RuntimeError
+ def initialize(message = "Generic API Error")
+ super message
+ end
- parser.listen( :characters, %w{ ele } ) do |text|
- ele = text
- gotele = true
- end
+ def status
+ :internal_server_error
+ end
+ end
- parser.listen( :characters, %w{ time } ) do |text|
- if text && text != ''
- date = Time.parse(text)
- gotdate = true
- end
- end
+ # Raised when access is denied.
+ class APIAccessDenied < APIError
+ def initialize
+ super "Access denied"
+ end
+
+ def status
+ :forbidden
+ end
+ end
+
+ # Raised when an API object is not found.
+ class APINotFoundError < APIError
+ def initialize
+ super "Object not found"
+ end
+
+ def status
+ :not_found
+ end
+ end
+
+ # Raised when a precondition to an API action fails sanity check.
+ class APIPreconditionFailedError < APIError
+ def initialize(message = "")
+ super "Precondition failed: #{message}"
+ end
+
+ def status
+ :precondition_failed
+ end
+ end
+
+ # Raised when to delete an already-deleted object.
+ class APIAlreadyDeletedError < APIError
+ def initialize(object = "object", object_id = "")
+ @object = object
+ @object_id = object_id
+
+ super "The #{object} with the id #{object_id} has already been deleted"
+ end
+
+ attr_reader :object, :object_id
+
+ def status
+ :gone
+ end
+ end
+
+ # Raised when the user logged in isn't the same as the changeset
+ class APIUserChangesetMismatchError < APIError
+ def initialize
+ super "The user doesn't own that changeset"
+ end
+
+ def status
+ :conflict
+ end
+ end
+
+ # Raised when the changeset provided is already closed
+ class APIChangesetAlreadyClosedError < APIError
+ def initialize(changeset)
+ @changeset = changeset
+
+ super "The changeset #{changeset.id} was closed at #{changeset.closed_at}"
+ end
+
+ attr_reader :changeset
+
+ def status
+ :conflict
+ end
+ end
+
+ # Raised when the changeset provided is not yet closed
+ class APIChangesetNotYetClosedError < APIError
+ def initialize(changeset)
+ @changeset = changeset
+
+ super "The changeset #{changeset.id} is not yet closed."
+ end
+
+ attr_reader :changeset
+
+ def status
+ :conflict
+ end
+ end
+
+ # Raised when a user is already subscribed to the changeset
+ class APIChangesetAlreadySubscribedError < APIError
+ def initialize(changeset)
+ @changeset = changeset
+
+ super "You are already subscribed to changeset #{changeset.id}."
+ end
+
+ attr_reader :changeset
+
+ def status
+ :conflict
+ end
+ end
+
+ # Raised when a user is not subscribed to the changeset
+ class APIChangesetNotSubscribedError < APIError
+ def initialize(changeset)
+ @changeset = changeset
+
+ super "You are not subscribed to changeset #{changeset.id}."
+ end
+
+ attr_reader :changeset
+
+ def status
+ :not_found
+ end
+ end
+
+ # Raised when a change is expecting a changeset, but the changeset doesn't exist
+ class APIChangesetMissingError < APIError
+ def initialize
+ super "You need to supply a changeset to be able to make a change"
+ end
+
+ def status
+ :conflict
+ end
+ end
+
+ # Raised when a diff is uploaded containing many changeset IDs which don't match
+ # the changeset ID that the diff was uploaded to.
+ class APIChangesetMismatchError < APIError
+ def initialize(provided, allowed)
+ super "Changeset mismatch: Provided #{provided} but only #{allowed} is allowed"
+ end
+
+ def status
+ :conflict
+ end
+ end
+
+ # Raised when a diff upload has an unknown action. You can only have create,
+ # modify, or delete
+ class APIChangesetActionInvalid < APIError
+ def initialize(provided)
+ super "Unknown action #{provided}, choices are create, modify, delete"
+ end
+
+ def status
+ :bad_request
+ end
+ end
+
+ # Raised when bad XML is encountered which stops things parsing as
+ # they should.
+ class APIBadXMLError < APIError
+ def initialize(model, xml, message = "")
+ super "Cannot parse valid #{model} from xml string #{xml}. #{message}"
+ end
+
+ def status
+ :bad_request
+ end
+ end
+
+ # Raised when the provided version is not equal to the latest in the db.
+ class APIVersionMismatchError < APIError
+ def initialize(id, type, provided, latest)
+ @id = id
+ @type = type
+ @provided = provided
+ @latest = latest
+
+ super "Version mismatch: Provided #{provided}, server had: #{latest} of #{type} #{id}"
+ end
+
+ attr_reader :provided, :latest, :id, :type
+
+ def status
+ :conflict
+ end
+ end
+
+ # raised when a two tags have a duplicate key string in an element.
+ # this is now forbidden by the API.
+ class APIDuplicateTagsError < APIError
+ def initialize(type, id, tag_key)
+ @type = type
+ @id = id
+ @tag_key = tag_key
+
+ super "Element #{type}/#{id} has duplicate tags with key #{tag_key}"
+ end
+
+ attr_reader :type, :id, :tag_key
+
+ def status
+ :bad_request
+ end
+ end
+
+ # Raised when a way has more than the configured number of way nodes.
+ # This prevents ways from being to long and difficult to work with
+ class APITooManyWayNodesError < APIError
+ def initialize(id, provided, max)
+ super "You tried to add #{provided} nodes to way #{id}, however only #{max} are allowed"
+
+ @id = id
+ @provided = provided
+ @max = max
+ end
+
+ attr_reader :id, :provided, :max
+
+ def status
+ :bad_request
+ end
+ end
- parser.listen( :end_element, %w{ trkseg } ) do |uri, localname, qname|
- @tracksegs += 1
+ ##
+ # raised when user input couldn't be parsed
+ class APIBadUserInput < APIError
+ def status
+ :bad_request
+ end
+ end
+
+ ##
+ # raised when bounding box is invalid
+ class APIBadBoundingBox < APIError
+ def status
+ :bad_request
+ end
+ end
+
+ ##
+ # raised when an API call is made using a method not supported on that URI
+ class APIBadMethodError < APIError
+ def initialize(supported_method)
+ super "Only method #{supported_method} is supported on this URI"
+ end
+
+ def status
+ :method_not_allowed
+ end
+ end
+
+ ##
+ # raised when an API call takes too long
+ class APITimeoutError < APIError
+ def initialize
+ super "Request timed out"
+ end
+
+ def status
+ :request_timeout
+ end
+ end
+
+ ##
+ # raised when someone tries to redact a current version of
+ # an element - only historical versions can be redacted.
+ class APICannotRedactError < APIError
+ def initialize
+ super "Cannot redact current version of element, only historical versions may be redacted."
+ end
+
+ def status
+ :bad_request
+ end
+ end
+
+ # Raised when the note provided is already closed
+ class APINoteAlreadyClosedError < APIError
+ def initialize(note)
+ @note = note
+
+ super "The note #{note.id} was closed at #{note.closed_at}"
+ end
+
+ attr_reader :note
+
+ def status
+ :conflict
+ end
+ end
+
+ # Raised when the note provided is already open
+ class APINoteAlreadyOpenError < APIError
+ def initialize(note)
+ @note = note
+
+ super "The note #{note.id} is already open"
+ end
+
+ attr_reader :note
+
+ def status
+ :conflict
+ end
+ end
+
+ # raised when a two preferences have a duplicate key string.
+ class APIDuplicatePreferenceError < APIError
+ def initialize(key)
+ @key = key
+
+ super "Duplicate preferences with key #{key}"
+ end
+
+ attr_reader :key
+
+ def status
+ :bad_request
+ end
+ end
+
+ # Helper methods for going to/from mercator and lat/lng.
+ class Mercator
+ include Math
+
+ # init me with your bounding box and the size of your image
+ def initialize(min_lat, min_lon, max_lat, max_lon, width, height)
+ xsize = xsheet(max_lon) - xsheet(min_lon)
+ ysize = ysheet(max_lat) - ysheet(min_lat)
+ xscale = xsize / width
+ yscale = ysize / height
+ scale = [xscale, yscale].max
+
+ xpad = width * scale - xsize
+ ypad = height * scale - ysize
+
+ @width = width
+ @height = height
+
+ @tx = xsheet(min_lon) - xpad / 2
+ @ty = ysheet(min_lat) - ypad / 2
+
+ @bx = xsheet(max_lon) + xpad / 2
+ @by = ysheet(max_lat) + ypad / 2
+ end
+
+ # the following two functions will give you the x/y on the entire sheet
+
+ def ysheet(lat)
+ log(tan(PI / 4 + (lat * PI / 180 / 2))) / (PI / 180)
+ end
+
+ def xsheet(lon)
+ lon
+ end
+
+ # and these two will give you the right points on your image. all the constants can be reduced to speed things up. FIXME
+ # If the bbox has no extent, return the centre of the image to avoid dividing by zero.
+
+ def y(lat)
+ return @height / 2 if (@by - @ty).zero?
+
+ @height - ((ysheet(lat) - @ty) / (@by - @ty) * @height)
+ end
+
+ def x(lon)
+ return @width / 2 if (@bx - @tx).zero?
+
+ ((xsheet(lon) - @tx) / (@bx - @tx) * @width)
+ end
+ end
+
+ class GreatCircle
+ include Math
+
+ # initialise with a base position
+ def initialize(lat, lon)
+ @lat = lat * PI / 180
+ @lon = lon * PI / 180
+ end
+
+ # get the distance from the base position to a given position
+ def distance(lat, lon)
+ lat = lat * PI / 180
+ lon = lon * PI / 180
+ 6372.795 * 2 * asin(sqrt(sin((lat - @lat) / 2)**2 + cos(@lat) * cos(lat) * sin((lon - @lon) / 2)**2))
+ end
+
+ # get the worst case bounds for a given radius from the base position
+ def bounds(radius)
+ latradius = 2 * asin(sqrt(sin(radius / 6372.795 / 2)**2))
+
+ begin
+ lonradius = 2 * asin(sqrt(sin(radius / 6372.795 / 2)**2 / cos(@lat)**2))
+ rescue Errno::EDOM, Math::DomainError
+ lonradius = PI
end
- parser.listen( :end_element, %w{ trkpt } ) do |uri,localname,qname|
- if gotlatlon && gotdate
- ele = '0' unless gotele
- if lat < 90 && lat > -90 && lon > -180 && lon < 180
- yield Hash['latitude' => lat,'longitude' => lon,'timestamp' => date,'altitude' => ele,'segment' => @tracksegs]
- end
- end
- gotlatlon = false
- gotele = false
- gotdate = false
+ minlat = [(@lat - latradius) * 180 / PI, -90].max
+ maxlat = [(@lat + latradius) * 180 / PI, 90].min
+ minlon = [(@lon - lonradius) * 180 / PI, -180].max
+ maxlon = [(@lon + lonradius) * 180 / PI, 180].min
+
+ BoundingBox.new(minlon, minlat, maxlon, maxlat)
+ end
+
+ # get the SQL to use to calculate distance
+ def sql_for_distance(lat_field, lon_field)
+ "6372.795 * 2 * asin(sqrt(power(sin((radians(#{lat_field}) - #{@lat}) / 2), 2) + cos(#{@lat}) * cos(radians(#{lat_field})) * power(sin((radians(#{lon_field}) - #{@lon})/2), 2)))"
+ end
+ end
+
+ class API
+ def get_xml_doc
+ doc = XML::Document.new
+ doc.encoding = XML::Encoding::UTF_8
+ root = XML::Node.new "osm"
+ xml_root_attributes.each do |k, v|
+ root[k] = v
end
- parser.parse
+ doc.root = root
+ doc
+ end
+
+ def xml_root_attributes
+ { "version" => Settings.api_version,
+ "generator" => Settings.generator,
+ "copyright" => Settings.copyright_owner,
+ "attribution" => Settings.attribution_url,
+ "license" => Settings.license_url }
end
end
+
+ def self.ip_to_country(ip_address)
+ ipinfo = maxmind_database.lookup(ip_address) if Settings.key?(:maxmind_database)
+
+ return ipinfo.country.iso_code if ipinfo&.found?
+
+ nil
+ end
+
+ def self.ip_location(ip_address)
+ code = OSM.ip_to_country(ip_address)
+
+ if code && country = Country.find(code)
+ return { :minlon => country.min_lon, :minlat => country.min_lat, :maxlon => country.max_lon, :maxlat => country.max_lat }
+ end
+
+ nil
+ end
+
+ # Parse a float, raising a specified exception on failure
+ def self.parse_float(str, klass, *args)
+ Float(str)
+ rescue StandardError
+ raise klass.new(*args)
+ end
+
+ # Construct a random token of a given length
+ def self.make_token(length = 30)
+ chars = "abcdefghijklmnopqrtuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+ token = ""
+
+ length.times do
+ token += chars[(rand * chars.length).to_i].chr
+ end
+
+ token
+ end
+
+ # Return an SQL fragment to select a given area of the globe
+ def self.sql_for_area(bbox, prefix = nil)
+ tilesql = QuadTile.sql_for_area(bbox, prefix)
+ bbox = bbox.to_scaled
+
+ "#{tilesql} AND #{prefix}latitude BETWEEN #{bbox.min_lat} AND #{bbox.max_lat} " \
+ "AND #{prefix}longitude BETWEEN #{bbox.min_lon} AND #{bbox.max_lon}"
+ end
+
+ # Return the terms and conditions text for a given country
+ def self.legal_text_for_country(country_code)
+ file_name = Rails.root.join("config", "legales", "#{country_code}.yml")
+ file_name = Rails.root.join("config", "legales", "#{Settings.default_legale}.yml") unless File.exist? file_name
+ YAML.load_file(file_name).transform_values!(&:html_safe)
+ end
+
+ # Return the HTTP client to use
+ def self.http_client
+ @http_client ||= Faraday.new
+ end
+
+ # Return the MaxMindDB database handle
+ def self.maxmind_database
+ @maxmind_database ||= MaxMindDB.new(Settings.maxmind_database) if Settings.key?(:maxmind_database)
+ end
end
projects / rails.git / blobdiff