X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/eab2eeaa47b2aa8c7f52371f9bfdd60711a41fb6..e5057dd57adca8e8ad6961eb15346cb365464667:/lib/osm.rb?ds=inline

diff --git a/lib/osm.rb b/lib/osm.rb
index 9e8198299..46f37036f 100644
--- a/lib/osm.rb
+++ b/lib/osm.rb
@@ -1,59 +1,61 @@
 # 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
+  require "time"
+  require "rexml/parsers/sax2parser"
+  require "rexml/text"
+  require "xml/libxml"
 
   # The base class for API Errors.
   class APIError < RuntimeError
+    def initialize(message = "Generic API Error")
+      super
+    end
+
     def status
       :internal_server_error
     end
+  end
+
+  # Raised when access is denied.
+  class APIAccessDenied < APIError
+    def initialize
+      super("Access denied")
+    end
 
-    def to_s
-      "Generic API Error"
+    def status
+      :forbidden
     end
   end
 
   # Raised when an API object is not found.
   class APINotFoundError < APIError
-    def status
-      :not_found
+    def initialize
+      super("Object not found")
     end
 
-    def to_s
-      "Object not found"
+    def status
+      :not_found
     end
   end
 
   # Raised when a precondition to an API action fails sanity check.
   class APIPreconditionFailedError < APIError
     def initialize(message = "")
-      @message = message
+      super("Precondition failed: #{message}")
     end
 
     def status
       :precondition_failed
     end
-
-    def to_s
-      "Precondition failed: #{@message}"
-    end
   end
 
   # Raised when to delete an already-deleted object.
   class APIAlreadyDeletedError < APIError
     def initialize(object = "object", object_id = "")
-      @object, @object_id = 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
@@ -61,20 +63,16 @@ module OSM
     def status
       :gone
     end
-
-    def to_s
-      "The #{object} with the id #{object_id} has already been deleted"
-    end
   end
 
   # Raised when the user logged in isn't the same as the changeset
   class APIUserChangesetMismatchError < APIError
-    def status
-      :conflict
+    def initialize
+      super("The user doesn't own that changeset")
     end
 
-    def to_s
-      "The user doesn't own that changeset"
+    def status
+      :conflict
     end
   end
 
@@ -82,6 +80,8 @@ module OSM
   class APIChangesetAlreadyClosedError < APIError
     def initialize(changeset)
       @changeset = changeset
+
+      super("The changeset #{changeset.id} was closed at #{changeset.closed_at}")
     end
 
     attr_reader :changeset
@@ -89,20 +89,61 @@ module OSM
     def status
       :conflict
     end
+  end
+
+  # Raised when the changeset provided is not yet closed
+  class APIChangesetNotYetClosedError < APIError
+    def initialize(changeset)
+      @changeset = changeset
 
-    def to_s
-      "The changeset #{@changeset.id} was closed at #{@changeset.closed_at}"
+      super("The changeset #{changeset.id} is not yet closed.")
+    end
+
+    attr_reader :changeset
+
+    def status
+      :conflict
     end
   end
 
-  # Raised when a change is expecting a changeset, but the changeset doesn't exist
-  class APIChangesetMissingError < APIError
+  # 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
 
-    def to_s
-      "You need to supply a changeset to be able to make a change"
+  # 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
 
@@ -110,54 +151,47 @@ module OSM
   # the changeset ID that the diff was uploaded to.
   class APIChangesetMismatchError < APIError
     def initialize(provided, allowed)
-      @provided, @allowed = provided, allowed
+      super("Changeset mismatch: Provided #{provided} but only #{allowed} is allowed")
     end
 
     def status
       :conflict
     end
-
-    def to_s
-      "Changeset mismatch: Provided #{@provided} but only #{@allowed} is allowed"
-    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)
-      @provided = provided
+      super("Unknown action #{provided}, choices are create, modify, delete")
     end
 
     def status
       :bad_request
     end
-
-    def to_s
-      "Unknown action #{@provided}, choices are create, modify, delete"
-    end
   end
 
   # Raised when bad XML is encountered which stops things parsing as
   # they should.
   class APIBadXMLError < APIError
-    def initialize(model, xml, message="")
-      @model, @xml, @message = model, xml, message
+    def initialize(model, xml, message = "")
+      super("Cannot parse valid #{model} from xml string #{xml}. #{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, @type, @provided, @latest = 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
@@ -165,17 +199,17 @@ module OSM
     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, @id, @tag_key = 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
@@ -183,17 +217,17 @@ module OSM
     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, @provided, @max = 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
@@ -201,69 +235,63 @@ module OSM
     def status
       :bad_request
     end
+  end
 
-    def to_s
-      "You tried to add #{provided} nodes to way #{id}, however only #{max} are allowed"
+  # Raised when a relation has more than the configured number of relation members.
+  # This prevents relations from being too complex and difficult to work with
+  class APITooManyRelationMembersError < APIError
+    def initialize(id, provided, max)
+      super("You tried to add #{provided} members to relation #{id}, however only #{max} are allowed")
+
+      @id = id
+      @provided = provided
+      @max = max
+    end
+
+    attr_reader :id, :provided, :max
+
+    def status
+      :bad_request
     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
+      super("Only method #{supported_method} is supported on this URI")
     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
+    def initialize
+      super("Request timed out")
     end
 
-    def to_s
-      "Request timed out"
+    def status
+      :request_timeout
     end
   end
 
@@ -271,12 +299,12 @@ module OSM
   # 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
+    def initialize
+      super("Cannot redact current version of element, only historical versions may be redacted.")
     end
 
-    def to_s
-      "Cannot redact current version of element, only historical versions may be redacted."
+    def status
+      :bad_request
     end
   end
 
@@ -284,6 +312,8 @@ module OSM
   class APINoteAlreadyClosedError < APIError
     def initialize(note)
       @note = note
+
+      super("The note #{note.id} was closed at #{note.closed_at}")
     end
 
     attr_reader :note
@@ -291,16 +321,14 @@ module OSM
     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
+
+      super("The note #{note.id} is already open")
     end
 
     attr_reader :note
@@ -308,16 +336,14 @@ module OSM
     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
+
+      super("Duplicate preferences with key #{key}")
     end
 
     attr_reader :key
@@ -325,9 +351,27 @@ module OSM
     def status
       :bad_request
     end
+  end
+
+  # Raised when a rate limit is exceeded
+  class APIRateLimitExceeded < APIError
+    def initialize
+      super("Rate limit exceeded")
+    end
+
+    def status
+      :too_many_requests
+    end
+  end
+
+  # Raised when a size limit is exceeded
+  class APISizeLimitExceeded < APIError
+    def initialize
+      super("Size limit exceeded")
+    end
 
-    def to_s
-      "Duplicate preferences with key #{@key}"
+    def status
+      :payload_too_large
     end
   end
 
@@ -335,7 +379,7 @@ module OSM
   class Mercator
     include Math
 
-    #init me with your bounding box and the size of your image
+    # 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)
@@ -343,37 +387,42 @@ module OSM
       yscale = ysize / height
       scale = [xscale, yscale].max
 
-      xpad = width * scale - xsize
-      ypad = height * scale - ysize
+      xpad = (width * scale) - xsize
+      ypad = (height * scale) - ysize
 
       @width = width
       @height = height
 
-      @tx = xsheet(min_lon) - xpad / 2
-      @ty = ysheet(min_lat) - ypad / 2
+      @tx = xsheet(min_lon) - (xpad / 2)
+      @ty = ysheet(min_lat) - (ypad / 2)
 
-      @bx = xsheet(max_lon) + xpad / 2
-      @by = ysheet(max_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
+    # 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)
+      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
+    # 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 - ((ysheet(lat) - @ty) / (@by - @ty) * @height)
+      return @height / 2 if (@by - @ty).zero?
+
+      @height - ((ysheet(lat) - @ty) / (@by - @ty) * @height)
     end
 
     def x(lon)
-      return  ((xsheet(lon) - @tx) / (@bx - @tx) * @width)
+      return @width / 2 if (@bx - @tx).zero?
+
+      ((xsheet(lon) - @tx) / (@bx - @tx) * @width)
     end
   end
 
@@ -390,25 +439,25 @@ module OSM
     def distance(lat, lon)
       lat = lat * PI / 180
       lon = lon * PI / 180
-      return 6372.795 * 2 * asin(sqrt(sin((lat - @lat) / 2) ** 2 + cos(@lat) * cos(lat) * sin((lon - @lon)/2) ** 2))
+      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))
+      latradius = 2 * asin(sqrt(sin(radius / 6372.795 / 2)**2))
 
       begin
-        lonradius = 2 * asin(sqrt(sin(radius / 6372.795 / 2) ** 2 / cos(@lat) ** 2))
+        lonradius = 2 * asin(sqrt((sin(radius / 6372.795 / 2)**2) / (cos(@lat)**2)))
       rescue Errno::EDOM, Math::DomainError
         lonradius = PI
       end
 
-      minlat = (@lat - latradius) * 180 / PI
-      maxlat = (@lat + latradius) * 180 / PI
-      minlon = (@lon - lonradius) * 180 / PI
-      maxlon = (@lon + lonradius) * 180 / PI
+      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
 
-      return { :minlat => minlat, :maxlat => maxlat, :minlon => minlon, :maxlon => maxlon }
+      BoundingBox.new(minlon, minlat, maxlon, maxlat)
     end
 
     # get the SQL to use to calculate distance
@@ -418,68 +467,54 @@ module OSM
   end
 
   class API
-    def get_xml_doc
+    def xml_doc
       doc = XML::Document.new
       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
+      root = XML::Node.new "osm"
+      xml_root_attributes.each do |k, v|
+        root[k] = v
+      end
       doc.root = root
-      return doc
+      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.IPToCountry(ip_address)
-    Timer.timeout(4) do
-      ipinfo = Quova::IpInfo.new(ip_address)
+  def self.ip_to_country(ip_address)
+    ipinfo = maxmind_database.lookup(ip_address) if Settings.key?(:maxmind_database)
 
-      if ipinfo.status == Quova::Success then
-        country = ipinfo.country_code
-      else
-        Net::HTTP.start('api.hostip.info') do |http|
-          country = http.get("/country.php?ip=#{ip_address}").body
-          country = "GB" if country == "UK"
-        end
-      end
+    return ipinfo.country.iso_code if ipinfo&.found?
 
-      return country.upcase
-    end
-
-    return nil
-  rescue Exception
-    return nil
+    nil
   end
 
-  def self.IPLocation(ip_address)
-    code = OSM.IPToCountry(ip_address)
+  def self.ip_location(ip_address)
+    code = OSM.ip_to_country(ip_address)
 
-    if code and country = Country.find_by_code(code)
+    if code && country = Country.find(code)
       return { :minlon => country.min_lon, :minlat => country.min_lat, :maxlon => country.max_lon, :maxlat => country.max_lat }
     end
 
-    return nil
+    nil
   end
 
   # Parse a float, raising a specified exception on failure
   def self.parse_float(str, klass, *args)
     Float(str)
-  rescue
+  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
-
-    return token
+  def self.make_token(length = 24)
+    SecureRandom.urlsafe_base64(length)
   end
 
   # Return an SQL fragment to select a given area of the globe
@@ -487,13 +522,25 @@ module OSM
     tilesql = QuadTile.sql_for_area(bbox, prefix)
     bbox = bbox.to_scaled
 
-    return "#{tilesql} AND #{prefix}latitude BETWEEN #{bbox.min_lat} AND #{bbox.max_lat} " +
-                      "AND #{prefix}longitude BETWEEN #{bbox.min_lon} AND #{bbox.max_lon}"
+    "#{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)
+    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(:request => { :timeout => 15 },
+                                 :headers => { :user_agent => Settings.server_url })
+  end
+
+  # Return the MaxMindDB database handle
+  def self.maxmind_database
+    @maxmind_database ||= MaxMindDB.new(Settings.maxmind_database) if Settings.key?(:maxmind_database)
   end
 end