+# The OSM module provides support functions for OSM.
module OSM
+ require "time"
+ require "rexml/parsers/sax2parser"
+ require "rexml/text"
+ require "xml/libxml"
+
+ if defined?(SystemTimer)
+ Timer = SystemTimer
+ else
+ require "timeout"
+ Timer = Timeout
+ end
- # 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']}
+ # The base class for API Errors.
+ class APIError < RuntimeError
+ def status
+ :internal_server_error
+ end
- require 'time'
- require 'rexml/parsers/sax2parser'
- require 'rexml/text'
- require 'xml/libxml'
- require 'RMagick'
+ def to_s
+ "Generic API Error"
+ end
+ end
- class Mercator
- include Math
+ # Raised when access is denied.
+ class APIAccessDenied < RuntimeError
+ def status
+ :forbidden
+ end
- def initialize(lat, lon, degrees_per_pixel, width, height)
- #init me with your centre lat/lon, the number of degrees per pixel and the size of your image
- @clat = lat
- @clon = lon
- @degrees_per_pixel = degrees_per_pixel
- @width = width
- @height = height
- @dlon = width / 2 * degrees_per_pixel
- @dlat = height / 2 * degrees_per_pixel * cos(@clat * PI / 180)
+ def to_s
+ "Access denied"
+ end
+ end
- @tx = xsheet(@clon - @dlon)
- @ty = ysheet(@clat - @dlat)
+ # Raised when an API object is not found.
+ class APINotFoundError < APIError
+ def status
+ :not_found
+ end
- @bx = xsheet(@clon + @dlon)
- @by = ysheet(@clat + @dlat)
+ def to_s
+ "Object not found"
+ end
+ end
+ # Raised when a precondition to an API action fails sanity check.
+ class APIPreconditionFailedError < APIError
+ def initialize(message = "")
+ @message = message
end
- #the following two functions will give you the x/y on the entire sheet
+ def status
+ :precondition_failed
+ end
- def kilometerinpixels
- return 40008.0 / 360.0 * @degrees_per_pixel
+ def to_s
+ "Precondition failed: #{@message}"
end
+ end
- def ysheet(lat)
- log(tan(PI / 4 + (lat * PI / 180 / 2)))
+ # Raised when to delete an already-deleted object.
+ class APIAlreadyDeletedError < APIError
+ def initialize(object = "object", object_id = "")
+ @object = object
+ @object_id = object_id
end
- def xsheet(lon)
- lon
+ attr_reader :object, :object_id
+
+ def status
+ :gone
end
- #and these two will give you the right points on your image. all the constants can be reduced to speed things up. FIXME
+ def to_s
+ "The #{object} with the id #{object_id} has already been deleted"
+ end
+ end
- def y(lat)
- return @height - ((ysheet(lat) - @ty) / (@by - @ty) * @height)
+ # Raised when the user logged in isn't the same as the changeset
+ class APIUserChangesetMismatchError < APIError
+ def status
+ :conflict
end
- def x(lon)
- return ((xsheet(lon) - @tx) / (@bx - @tx) * @width)
+ def to_s
+ "The user doesn't own that changeset"
end
end
+ # Raised when the changeset provided is already closed
+ class APIChangesetAlreadyClosedError < APIError
+ def initialize(changeset)
+ @changeset = changeset
+ end
- class GPXImporter
- # FIXME swap REXML for libXML
- attr_reader :possible_points
- attr_reader :actual_points
- attr_reader :tracksegs
+ attr_reader :changeset
- def initialize(filename)
- @possible_points = 0
- @actual_points = 0
- @tracksegs = 0
- @points = []
+ def status
+ :conflict
+ end
- file = File.new(filename)
- parser = REXML::Parsers::SAX2Parser.new( file )
+ def to_s
+ "The changeset #{@changeset.id} was closed at #{@changeset.closed_at}"
+ end
+ end
- lat = -1
- lon = -1
- ele = -1
- date = Time.now();
- gotlatlon = false
- gotele = false
- gotdate = false
+ # Raised when the changeset provided is not yet closed
+ class APIChangesetNotYetClosedError < APIError
+ def initialize(changeset)
+ @changeset = changeset
+ end
- 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
+ attr_reader :changeset
- parser.listen( :characters, %w{ ele } ) do |text|
- ele = text
- gotele = true
- end
+ def status
+ :conflict
+ end
- parser.listen( :characters, %w{ time } ) do |text|
- if text && text != ''
- date = Time.parse(text)
- gotdate = true
- end
- end
+ def to_s
+ "The changeset #{@changeset.id} is not yet closed."
+ end
+ end
- parser.listen( :end_element, %w{ trkseg } ) do |uri, localname, qname|
- @tracksegs += 1
- end
+ # Raised when a user is already subscribed to the changeset
+ class APIChangesetAlreadySubscribedError < APIError
+ def initialize(changeset)
+ @changeset = changeset
+ 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
- @actual_points += 1
- @points.push(Hash['latitude' => lat,'longitude' => lon,'timestamp' => date,'altitude' => ele,'segment' => @tracksegs])
- end
- end
- gotlatlon = false
- gotele = false
- gotdate = false
- end
- parser.parse
+ attr_reader :changeset
+
+ def status
+ :conflict
end
- def points
- @points.each { |p| yield p }
+ def to_s
+ "You are already subscribed to changeset #{@changeset.id}."
end
+ end
- def get_picture(min_lat, min_lon, max_lat, max_lon, num_points)
- #puts "getting picfor bbox #{min_lat},#{min_lon} - #{max_lat},#{max_lon}"
- frames = 10
- width = 250
- height = 250
- rat= Math.cos( ((max_lat + min_lat)/2.0) / 180.0 * 3.141592)
- proj = OSM::Mercator.new((min_lat + max_lat) / 2, (max_lon + min_lon) / 2, (max_lat - min_lat) / width / rat, width, height)
+ # Raised when a user is not subscribed to the changeset
+ class APIChangesetNotSubscribedError < APIError
+ def initialize(changeset)
+ @changeset = changeset
+ end
- images = []
+ attr_reader :changeset
- frames.times do
- gc = Magick::Draw.new
- gc.stroke_linejoin('miter')
- gc.stroke('#FFFFFF')
- gc.fill('#FFFFFF')
- gc.rectangle(0,0,width,height)
- gc.stroke_width(1)
- images << gc
- end
+ def status
+ :not_found
+ end
- oldpx = 0.0
- oldpy = 0.0
-
- first = true
-
- m = 0
- mm = 0
- points do |p|
- px = proj.x(p['longitude'])
- py = proj.y(p['latitude'])
- frames.times do |n|
- images[n].stroke_width(1)
- images[n].stroke('#BBBBBB')
- images[n].fill('#BBBBBB')
- # puts "A #{px},#{py} - #{oldpx},#{oldpy}"
- images[n].line(px, py, oldpx, oldpy ) unless first
- end
- images[mm].stroke_width(3)
- images[mm].stroke('#000000')
- images[mm].fill('#000000')
- images[mm].line(px, py, oldpx, oldpy ) unless first
- # puts "B #{px},#{py} - #{oldpx},#{oldpy}"
- m +=1
- if m > num_points.to_f / frames.to_f * (mm+1)
- mm += 1
- end
- first = false
- oldpy = py
- oldpx = px
- end
+ def to_s
+ "You are not subscribed to changeset #{@changeset.id}."
+ end
+ end
- il = Magick::ImageList.new
-
- frames.times do |n|
- canvas = Magick::Image.new(width, height) {
- self.background_color = 'white'
- }
- begin
- images[n].draw(canvas)
- rescue ArgumentError
- end
- canvas.format = 'GIF'
- il << canvas
- end
+ # Raised when a change is expecting a changeset, but the changeset doesn't exist
+ class APIChangesetMissingError < APIError
+ def status
+ :conflict
+ end
- il.delay = 50
- il.format = 'GIF'
- return il.to_blob
+ def to_s
+ "You need to supply a changeset to be able to make a change"
end
+ end
- def get_icon(min_lat, min_lon, max_lat, max_lon)
- puts "getting icon for bbox #{min_lat},#{min_lon} - #{max_lat},#{max_lon}"
- width = 50
- height = 50
- rat= Math.cos( ((max_lat + min_lat)/2.0) / 180.0 * 3.141592)
- proj = OSM::Mercator.new((min_lat + max_lat) / 2, (max_lon + min_lon) / 2, (max_lat - min_lat) / width / rat, width, height)
+ # 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)
+ @provided = provided
+ @allowed = allowed
+ end
- images = []
+ def status
+ :conflict
+ end
- gc = Magick::Draw.new
- gc.stroke_linejoin('miter')
+ def to_s
+ "Changeset mismatch: Provided #{@provided} but only #{@allowed} is allowed"
+ end
+ end
- oldpx = 0.0
- oldpy = 0.0
+ # Raised when a diff upload has an unknown action. You can only have create,
+ # modify, or delete
+ class APIChangesetActionInvalid < APIError
+ def initialize(provided)
+ @provided = provided
+ end
- first = true
+ def status
+ :bad_request
+ end
- gc.stroke_width(1)
- gc.stroke('#000000')
- gc.fill('#000000')
+ def to_s
+ "Unknown action #{@provided}, choices are create, modify, delete"
+ end
+ end
- points do |p|
- px = proj.x(p['longitude'])
- py = proj.y(p['latitude'])
- gc.line(px, py, oldpx, oldpy ) unless first
- # puts "C #{px},#{py} - #{oldpx},#{oldpy}"
- first = false
- oldpy = py
- oldpx = px
- end
+ # Raised when bad XML is encountered which stops things parsing as
+ # they should.
+ class APIBadXMLError < APIError
+ def initialize(model, xml, message = "")
+ @model = model
+ @xml = xml
+ @message = message
+ end
+
+ def status
+ :bad_request
+ end
+
+ def to_s
+ "Cannot parse valid #{@model} from xml string #{@xml}. #{@message}"
+ 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
+ end
+
+ attr_reader :provided, :latest, :id, :type
+
+ def status
+ :conflict
+ end
+
+ def to_s
+ "Version mismatch: Provided #{provided}, server had: #{latest} of #{type} #{id}"
+ 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
+ end
+
+ attr_reader :type, :id, :tag_key
+
+ def status
+ :bad_request
+ end
+
+ def to_s
+ "Element #{@type}/#{@id} has duplicate tags with key #{@tag_key}"
+ 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)
+ @id = id
+ @provided = provided
+ @max = max
+ end
+
+ attr_reader :id, :provided, :max
+
+ def status
+ :bad_request
+ end
+
+ def to_s
+ "You tried to add #{provided} nodes to way #{id}, however only #{max} are allowed"
+ end
+ end
+
+ ##
+ # raised when user input couldn't be parsed
+ class APIBadUserInput < APIError
+ def initialize(message)
+ @message = message
+ end
+
+ def status
+ :bad_request
+ end
+
+ def to_s
+ @message
+ end
+ end
+
+ ##
+ # raised when bounding box is invalid
+ class APIBadBoundingBox < APIError
+ def initialize(message)
+ @message = message
+ end
+
+ def status
+ :bad_request
+ end
+
+ def to_s
+ @message
+ end
+ end
+
+ ##
+ # raised when an API call is made using a method not supported on that URI
+ class APIBadMethodError < APIError
+ def initialize(supported_method)
+ @supported_method = supported_method
+ end
+
+ def status
+ :method_not_allowed
+ end
+
+ def to_s
+ "Only method #{@supported_method} is supported on this URI"
+ end
+ end
+
+ ##
+ # raised when an API call takes too long
+ class APITimeoutError < APIError
+ def status
+ :request_timeout
+ end
+
+ def to_s
+ "Request timed out"
+ end
+ end
+
+ ##
+ # raised when someone tries to redact a current version of
+ # an element - only historical versions can be redacted.
+ class APICannotRedactError < APIError
+ def status
+ :bad_request
+ end
+
+ def to_s
+ "Cannot redact current version of element, only historical versions may be redacted."
+ end
+ end
+
+ # Raised when the note provided is already closed
+ class APINoteAlreadyClosedError < APIError
+ def initialize(note)
+ @note = note
+ end
+
+ attr_reader :note
+
+ def status
+ :conflict
+ end
+
+ def to_s
+ "The note #{@note.id} was closed at #{@note.closed_at}"
+ end
+ end
+
+ # Raised when the note provided is already open
+ class APINoteAlreadyOpenError < APIError
+ def initialize(note)
+ @note = note
+ end
+
+ attr_reader :note
+
+ def status
+ :conflict
+ end
+
+ def to_s
+ "The note #{@note.id} is already open"
+ end
+ end
+
+ # raised when a two preferences have a duplicate key string.
+ class APIDuplicatePreferenceError < APIError
+ def initialize(key)
+ @key = key
+ end
+
+ attr_reader :key
+
+ def status
+ :bad_request
+ end
+
+ def to_s
+ "Duplicate preferences with key #{@key}"
+ 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
+
+ def y(lat)
+ @height - ((ysheet(lat) - @ty) / (@by - @ty) * @height)
+ end
+
+ def x(lon)
+ ((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))
- canvas = Magick::Image.new(width, height) {
- self.background_color = 'white'
- }
begin
- gc.draw(canvas)
- rescue ArgumentError
+ lonradius = 2 * asin(sqrt(sin(radius / 6372.795 / 2)**2 / cos(@lat)**2))
+ rescue Errno::EDOM, Math::DomainError
+ lonradius = PI
end
- canvas.format = 'GIF'
- return canvas.to_blob
- end
-
- end
-
- class GeoRSS
- def initialize(description='OpenStreetMap GPS Traces')
- @doc = XML::Document.new
- @doc.encoding = 'UTF-8'
-
- rss = XML::Node.new 'rss'
- @doc.root = rss
- rss['version'] = "2.0"
- rss['xmlns:geo'] = "http://www.w3.org/2003/01/geo/wgs84_pos#"
- @channel = XML::Node.new 'channel'
- rss << @channel
- title = XML::Node.new 'title'
- title << 'OpenStreetMap GPS Traces'
- @channel << title
- description_el = XML::Node.new 'description'
- @channel << description_el
-
- description_el << description
- link = XML::Node.new 'link'
- link << 'http://www.openstreetmap.org/traces/'
- @channel << link
- image = XML::Node.new 'image'
- @channel << image
- url = XML::Node.new 'url'
- url << 'http://www.openstreetmap.org/feeds/mag_map-rss2.0.png'
- image << url
- title = XML::Node.new 'title'
- title << "OpenStreetMap"
- image << title
- width = XML::Node.new 'width'
- width << '100'
- image << width
- height = XML::Node.new 'height'
- height << '100'
- image << height
- link = XML::Node.new 'link'
- link << 'http://www.openstreetmap.org/traces/'
- image << link
- end
-
- def add(latitude=0, longitude=0, title_text='dummy title', url='http://www.example.com/', description_text='dummy description', timestamp=Time.now)
- item = XML::Node.new 'item'
-
- title = XML::Node.new 'title'
- item << title
- title << title_text
- link = XML::Node.new 'link'
- link << url
- item << link
-
- description = XML::Node.new 'description'
- description << description_text
- item << description
-
- pubDate = XML::Node.new 'pubDate'
- pubDate << timestamp.xmlschema
- item << pubDate
-
- lat_el = XML::Node.new 'geo:lat'
- lat_el << latitude.to_s
- item << lat_el
-
- lon_el = XML::Node.new 'geo:long'
- lon_el << longitude.to_s
- item << lon_el
-
- @channel << item
+
+ minlat = (@lat - latradius) * 180 / PI
+ maxlat = (@lat + latradius) * 180 / PI
+ minlon = (@lon - lonradius) * 180 / PI
+ maxlon = (@lon + lonradius) * 180 / PI
+
+ { :minlat => minlat, :maxlat => maxlat, :minlon => minlon, :maxlon => maxlon }
end
- def to_s
- return @doc.to_s
+ # 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 = 'UTF-8'
- root = XML::Node.new 'osm'
- root['version'] = API_VERSION
- root['generator'] = 'OpenStreetMap server'
+ doc.encoding = XML::Encoding::UTF_8
+ root = XML::Node.new "osm"
+ root["version"] = API_VERSION.to_s
+ root["generator"] = GENERATOR
+ root["copyright"] = COPYRIGHT_OWNER
+ root["attribution"] = ATTRIBUTION_URL
+ root["license"] = LICENSE_URL
doc.root = root
- return doc
+ doc
+ end
+ end
+
+ def self.ip_to_country(ip_address)
+ ipinfo = geoip_database.country(ip_address) if defined?(GEOIP_DATABASE)
+
+ if ipinfo
+ country = ipinfo.country_code2
+ else
+ country = http_client.get("http://api.hostip.info/country.php?ip=#{ip_address}").body
+ country = "GB" if country == "UK"
+ end
+
+ return country
+ rescue StandardError
+ return 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
+ 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 = File.join(Rails.root, "config", "legales", country_code.to_s + ".yml")
+ file_name = File.join(Rails.root, "config", "legales", DEFAULT_LEGALE + ".yml") unless File.exist? file_name
+ YAML.load_file(file_name)
+ end
+
+ # Return the HTTP client to use
+ def self.http_client
+ @http_client ||= Faraday.new
+ end
+
+ # Return the GeoIP database handle
+ def self.geoip_database
+ @geoip_database ||= GeoIP.new(GEOIP_DATABASE) if defined?(GEOIP_DATABASE)
end
end
projects / rails.git / blobdiff