X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/721dd9c27d299455b9159457a095716f797389f1..3f3ffdfea1ecb57fb95e24b71ed070c8f9fbedbd:/lib/osm.rb

diff --git a/lib/osm.rb b/lib/osm.rb
index f6646503d..80b68c2a9 100644
--- a/lib/osm.rb
+++ b/lib/osm.rb
@@ -1,24 +1,47 @@
 # 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"
+
+  if defined?(SystemTimer)
+    Timer = SystemTimer
+  else
+    require "timeout"
+    Timer = Timeout
+  end
 
   # The base class for API Errors.
   class APIError < RuntimeError
-    def render_opts
-      { :text => "Generic API Error", :status => :internal_server_error, :content_type => "text/plain" }
+    def status
+      :internal_server_error
+    end
+
+    def to_s
+      "Generic API Error"
+    end
+  end
+
+  # Raised when access is denied.
+  class APIAccessDenied < RuntimeError
+    def status
+      :forbidden
+    end
+
+    def to_s
+      "Access denied"
     end
   end
 
   # Raised when an API object is not found.
   class APINotFoundError < APIError
-    def render_opts
-      { :text => "The API wasn't found", :status => :not_found, :content_type => "text/plain" }
+    def status
+      :not_found
+    end
+
+    def to_s
+      "Object not found"
     end
   end
 
@@ -27,23 +50,42 @@ module OSM
     def initialize(message = "")
       @message = message
     end
-    
-    def render_opts
-      { :text => "Precondition failed: #{@message}", :status => :precondition_failed, :content_type => "text/plain" }
+
+    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 render_opts
-      { :text => "The object has already been deleted", :status => :gone, :content_type => "text/plain" }
+    def initialize(object = "object", object_id = "")
+      @object = object
+      @object_id = object_id
+    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 render_opts
-      { :text => "The user doesn't own that changeset", :status => :conflict, :content_type => "text/plain" }
+    def status
+      :conflict
+    end
+
+    def to_s
+      "The user doesn't own that changeset"
     end
   end
 
@@ -54,16 +96,75 @@ module OSM
     end
 
     attr_reader :changeset
-    
-    def render_opts
-      { :text => "The changeset #{@changeset.id} was closed at #{@changeset.closed_at}.", :status => :conflict, :content_type => "text/plain" }
+
+    def status
+      :conflict
+    end
+
+    def to_s
+      "The changeset #{@changeset.id} was closed at #{@changeset.closed_at}"
+    end
+  end
+
+  # Raised when the changeset provided is not yet closed
+  class APIChangesetNotYetClosedError < APIError
+    def initialize(changeset)
+      @changeset = changeset
+    end
+
+    attr_reader :changeset
+
+    def status
+      :conflict
+    end
+
+    def to_s
+      "The changeset #{@changeset.id} is not yet closed."
     end
   end
-  
+
+  # Raised when a user is already subscribed to the changeset
+  class APIChangesetAlreadySubscribedError < APIError
+    def initialize(changeset)
+      @changeset = changeset
+    end
+
+    attr_reader :changeset
+
+    def status
+      :conflict
+    end
+
+    def to_s
+      "You are already subscribed to changeset #{@changeset.id}."
+    end
+  end
+
+  # Raised when a user is not subscribed to the changeset
+  class APIChangesetNotSubscribedError < APIError
+    def initialize(changeset)
+      @changeset = changeset
+    end
+
+    attr_reader :changeset
+
+    def status
+      :not_found
+    end
+
+    def to_s
+      "You are not subscribed to changeset #{@changeset.id}."
+    end
+  end
+
   # Raised when a change is expecting a changeset, but the changeset doesn't exist
   class APIChangesetMissingError < APIError
-    def render_opts
-      { :text => "You need to supply a changeset to be able to make a change", :status => :conflict, :content_type => "text/plain" }
+    def status
+      :conflict
+    end
+
+    def to_s
+      "You need to supply a changeset to be able to make a change"
     end
   end
 
@@ -71,53 +172,70 @@ module OSM
   # the changeset ID that the diff was uploaded to.
   class APIChangesetMismatchError < APIError
     def initialize(provided, allowed)
-      @provided, @allowed = provided, allowed
+      @provided = provided
+      @allowed = allowed
     end
-    
-    def render_opts
-      { :text => "Changeset mismatch: Provided #{@provided} but only " +
-      "#{@allowed} is allowed.", :status => :conflict, :content_type => "text/plain" }
+
+    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
     end
-    
-    def render_opts
-      { :text => "Unknown action #{@provided}, choices are create, modify, delete.",
-      :status => :bad_request, :content_type => "text/plain" }
+
+    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 = "")
+      @model = model
+      @xml = xml
+      @message = message
     end
 
-    def render_opts
-      { :text => "Cannot parse valid #{@model} from xml string #{@xml}. #{@message}",
-      :status => :bad_request, :content_type => "text/plain" }
+    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
     end
 
     attr_reader :provided, :latest, :id, :type
 
-    def render_opts
-      { :text => "Version mismatch: Provided " + provided.to_s +
-        ", server had: " + latest.to_s + " of " + type + " " + id.to_s, 
-        :status => :conflict, :content_type => "text/plain" }
+    def status
+      :conflict
+    end
+
+    def to_s
+      "Version mismatch: Provided #{provided}, server had: #{latest} of #{type} #{id}"
     end
   end
 
@@ -125,29 +243,39 @@ module OSM
   # 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
     end
 
     attr_reader :type, :id, :tag_key
 
-    def render_opts
-      { :text => "Element #{@type}/#{@id} has duplicate tags with key #{@tag_key}.",
-        :status => :bad_request, :content_type => "text/plain" }
+    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(provided, max)
-      @provided, @max = provided, max
+    def initialize(id, provided, max)
+      @id = id
+      @provided = provided
+      @max = max
     end
-    
-    attr_reader :provided, :max
-    
-    def render_opts
-      { :text => "You tried to add #{provided} nodes to the way, however only #{max} are allowed",
-        :status => :bad_request, :content_type => "text/plain" }
+
+    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
 
@@ -158,8 +286,120 @@ module OSM
       @message = message
     end
 
-    def render_opts
-      { :text => @message, :content_type => "text/plain", :status => :bad_request }
+    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
 
@@ -167,7 +407,7 @@ 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)
@@ -188,7 +428,7 @@ module OSM
       @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)
@@ -198,14 +438,14 @@ module OSM
       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
 
     def y(lat)
-      return @height - ((ysheet(lat) - @ty) / (@by - @ty) * @height)
+      @height - ((ysheet(lat) - @ty) / (@by - @ty) * @height)
     end
 
     def x(lon)
-      return  ((xsheet(lon) - @tx) / (@bx - @tx) * @width)
+      ((xsheet(lon) - @tx) / (@bx - @tx) * @width)
     end
   end
 
@@ -222,170 +462,115 @@ 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))
+      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
+
       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
-  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 = '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
-      end
-
-      if longitude
-        lon_el = XML::Node.new 'geo:long'
-        lon_el << longitude.to_s
-        item << lon_el
-      end
 
-      @channel << item
+      { :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'] = GENERATOR
+      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
-    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"
-        Net::HTTP.start('ws.geonames.org') do |http|
-          xml = REXML::Document.new(http.get("/countryInfo?country=#{country}").body)
-          xml.elements.each("geonames/country") do |ele|
-            minlon = ele.get_text("bBoxWest").to_s
-            minlat = ele.get_text("bBoxSouth").to_s
-            maxlon = ele.get_text("bBoxEast").to_s
-            maxlat = ele.get_text("bBoxNorth").to_s
-            return { :minlon => minlon, :minlat => minlat, :maxlon => maxlon, :maxlat => maxlat }
-          end
-        end
-      end
+      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 nil
-  rescue Exception
+    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 = ''
+    chars = "abcdefghijklmnopqrtuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+    token = ""
 
     length.times do
       token += chars[(rand * chars.length).to_i].chr
     end
 
-    return token
-  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)
+    token
   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.to_s + ".yml")
+    file_name = Rails.root.join("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