X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/291350850de00bb32080c70e06599bf41eabd782..0196a2fb99c68a852dc85dcef4b0ca246732a1af:/lib/osm.rb

diff --git a/lib/osm.rb b/lib/osm.rb
index f36deb0a8..dd273418e 100644
--- a/lib/osm.rb
+++ b/lib/osm.rb
@@ -1,75 +1,78 @@
 # The OSM module provides support functions for OSM.
 module OSM
-
-  require 'time'
-  require 'rexml/parsers/sax2parser'
-  require 'rexml/text'
-  require 'xml/libxml'
-  require 'digest/md5'
-  require 'RMagick'
+  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
 
-    def to_s
-      "Generic API Error"
+  # 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 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}"
+      :precondition_failed
     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
 
     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
 
@@ -77,6 +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
@@ -84,20 +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
+
+      super("The changeset #{changeset.id} is not yet closed.")
+    end
 
-    def to_s
-      "The changeset #{@changeset.id} was closed at #{@changeset.closed_at}"
+    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
 
-    def to_s
-      "You need to supply a changeset to be able to make a change"
+  # 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
 
@@ -105,54 +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
@@ -160,17 +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
@@ -178,87 +217,161 @@ 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
 
     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
+  # 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
 
-    def to_s
-      @message
+  ##
+  # 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 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 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
+
+  # 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
-      "Request timed out"
+    def status
+      :payload_too_large
     end
   end
 
@@ -266,7 +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)
@@ -274,37 +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
 
@@ -321,167 +439,107 @@ 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))
-      lonradius = 2 * asin(sqrt(sin(radius / 6372.795 / 2) ** 2 / cos(@lat) ** 2))
-      minlat = (@lat - latradius) * 180 / PI
-      maxlat = (@lat + latradius) * 180 / PI
-      minlon = (@lon - lonradius) * 180 / PI
-      maxlon = (@lon + lonradius) * 180 / PI
-      return { :minlat => minlat, :maxlat => maxlat, :minlon => minlon, :maxlon => maxlon }
-    end
+      latradius = 2 * asin(sqrt(sin(radius / 6372.795 / 2)**2))
 
-    # 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 GeoRSS
-    def initialize(feed_title='OpenStreetMap GPS Traces', feed_description='OpenStreetMap GPS Traces', feed_url='http://www.openstreetmap.org/traces/')
-      @doc = XML::Document.new
-      @doc.encoding = XML::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 <<  feed_title
-      @channel << title
-      description_el = XML::Node.new 'description'
-      @channel << description_el
-
-      description_el << feed_description
-      link = XML::Node.new 'link'
-      link << feed_url
-      @channel << link
-      image = XML::Node.new 'image'
-      @channel << image
-      url = XML::Node.new 'url'
-      url << 'http://www.openstreetmap.org/images/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 << feed_url
-      image << link
-    end
-
-    def add(latitude=0, longitude=0, title_text='dummy title', author_text='anonymous', url='http://www.example.com/', description_text='dummy description', timestamp=DateTime.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
-
-      guid = XML::Node.new 'guid'
-      guid << url
-      item << guid
-
-      description = XML::Node.new 'description'
-      description << description_text
-      item << description
-
-      author = XML::Node.new 'author'
-      author << author_text
-      item << author
-
-      pubDate = XML::Node.new 'pubDate'
-      pubDate << timestamp.to_s(:rfc822)
-      item << pubDate
-
-      if latitude
-        lat_el = XML::Node.new 'geo:lat'
-        lat_el << latitude.to_s
-        item << lat_el
+      begin
+        lonradius = 2 * asin(sqrt((sin(radius / 6372.795 / 2)**2) / (cos(@lat)**2)))
+      rescue Errno::EDOM, Math::DomainError
+        lonradius = PI
       end
 
-      if longitude
-        lon_el = XML::Node.new 'geo:long'
-        lon_el << longitude.to_s
-        item << lon_el
-      end
+      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
 
-      @channel << item
+      BoundingBox.new(minlon, minlat, maxlon, maxlat)
     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
+    def xml_doc
       doc = XML::Document.new
       doc.encoding = XML::Encoding::UTF_8
-      root = XML::Node.new 'osm'
-      root['version'] = API_VERSION
-      root['generator'] = GENERATOR
+      root = XML::Node.new "osm"
+      xml_root_attributes.each do |k, v|
+        root[k] = v
+      end
       doc.root = root
-      return doc
+      doc
     end
-  end
 
-  def self.IPLocation(ip_address)
-    Timeout::timeout(4) do
-      Net::HTTP.start('api.hostip.info') do |http|
-        country = http.get("/country.php?ip=#{ip_address}").body
-        country = "GB" if country == "UK"
-        country = Country.find_by_code(country)
-        return { :minlon => country.min_lon, :minlat => country.min_lat, :maxlon => country.max_lon, :maxlat => country.max_lat }
-      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
 
-    return nil
-  rescue Exception
-    return nil
+  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
 
-  # Construct a random token of a given length
-  def self.make_token(length = 30)
-    chars = 'abcdefghijklmnopqrtuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
-    token = ''
+  def self.ip_location(ip_address)
+    code = OSM.ip_to_country(ip_address)
 
-    length.times do
-      token += chars[(rand * chars.length).to_i].chr
+    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 token
+    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
 
-  # Return an encrypted version of a password
-  def self.encrypt_password(password, salt)
-    return Digest::MD5.hexdigest(password) if salt.nil?
-    return Digest::MD5.hexdigest(salt + password)
+  # Construct a random token of a given length
+  def self.make_token(length = 24)
+    SecureRandom.urlsafe_base64(length)
   end
 
   # Return an SQL fragment to select a given area of the globe
-  def self.sql_for_area(minlat, minlon, maxlat, maxlon, prefix = nil)
-    tilesql = QuadTile.sql_for_area(minlat, minlon, maxlat, maxlon, prefix)
-    minlat = (minlat * 10000000).round
-    minlon = (minlon * 10000000).round
-    maxlat = (maxlat * 10000000).round
-    maxlon = (maxlon * 10000000).round
+  def self.sql_for_area(bbox, prefix = nil)
+    tilesql = QuadTile.sql_for_area(bbox, prefix)
+    bbox = bbox.to_scaled
 
-    return "#{tilesql} AND #{prefix}latitude BETWEEN #{minlat} AND #{maxlat} AND #{prefix}longitude BETWEEN #{minlon} AND #{maxlon}"
+    "#{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(:request => { :timeout => 15 })
+  end
+
+  # Return the MaxMindDB database handle
+  def self.maxmind_database
+    @maxmind_database ||= MaxMindDB.new(Settings.maxmind_database) if Settings.key?(:maxmind_database)
+  end
 end