Bit more work on the contributor terms page - still very much a work-in-progress.

[rails.git] / lib / osm.rb

diff --git a/lib/osm.rb b/lib/osm.rb
index 6e9346bb4f0076df8361c9a52b52348a8a426747..50e31a7ff8a3c3679833184aae7568470dba0fd3 100644 (file)
--- a/lib/osm.rb
+++ b/lib/osm.rb
@@ -1,13 +1,6 @@
+# The OSM module provides support functions for OSM.

 module OSM
 
 module OSM
 

-  # 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'
   require 'time'
   require 'rexml/parsers/sax2parser'
   require 'rexml/text'


@@ -15,236 +8,304 @@ module OSM
   require 'digest/md5'
   require 'RMagick'
 
   require 'digest/md5'
   require 'RMagick'
 

-  class Mercator
-    include Math
+  # The base class for API Errors.
+  class APIError < RuntimeError
+    def status
+      :internal_server_error
+    end

 
 

-    #init me with your bounding box and the size of your image
+    def to_s
+      "Generic API Error"
+    end
+  end

 
 

-    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
+  # Raised when an API object is not found.
+  class APINotFoundError < APIError
+    def status
+      :not_found
+    end

 
 

-      xpad = width * scale - xsize
-      ypad = height * scale - ysize
+    def to_s
+      "Object not found"
+    end
+  end

 
 

-      @width = width
-      @height = height
+  # Raised when a precondition to an API action fails sanity check.
+  class APIPreconditionFailedError < APIError
+    def initialize(message = "")
+      @message = message
+    end

 
 

-      @tx = xsheet(min_lon) - xpad / 2
-      @ty = ysheet(min_lat) - ypad / 2
+    def status
+      :precondition_failed
+    end

 
 

-      @bx = xsheet(max_lon) + xpad / 2
-      @by = ysheet(max_lat) + ypad / 2
+    def to_s
+      "Precondition failed: #{@message}"

     end
     end

+  end

 
 

-    #the following two functions will give you the x/y on the entire sheet
+  # Raised when to delete an already-deleted object.
+  class APIAlreadyDeletedError < APIError
+    def initialize(object = "object", object_id = "")
+      @object, @object_id = object, object_id
+    end

 
 

-    def ysheet(lat)
-      log(tan(PI / 4 + (lat * PI / 180 / 2))) / (PI / 180)
+    attr_reader :object, :object_id
+
+    def status
+      :gone

     end
 
     end
 

-    def xsheet(lon)
-      lon
+    def to_s
+      "The #{object} with the id #{object_id} has already been deleted"

     end
     end

+  end

 
 

-    #and these two will give you the right points on your image. all the constants can be reduced to speed things up. FIXME
+  # Raised when the user logged in isn't the same as the changeset
+  class APIUserChangesetMismatchError < APIError
+    def status
+      :conflict
+    end

 
 

-    def y(lat)
-      return @height - ((ysheet(lat) - @ty) / (@by - @ty) * @height)
+    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
 
     end
 

-    def x(lon)
-      return  ((xsheet(lon) - @tx) / (@bx - @tx) * @width)
+    attr_reader :changeset
+
+    def status
+      :conflict
+    end
+
+    def to_s
+      "The changeset #{@changeset.id} was closed at #{@changeset.closed_at}"

     end
   end
 
     end
   end
 

+  # Raised when a change is expecting a changeset, but the changeset doesn't exist
+  class APIChangesetMissingError < APIError
+    def status
+      :conflict
+    end

 
 

-  class GPXImporter
-    # FIXME swap REXML for libXML
-    attr_reader :possible_points
-    attr_reader :actual_points
-    attr_reader :tracksegs
+    def to_s
+      "You need to supply a changeset to be able to make a change"
+    end
+  end

 
 

-    def initialize(file)
-      @file = file
+  # 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, @allowed = provided, allowed

     end
 
     end
 

-    def points
-      @possible_points = 0
-      @actual_points = 0
-      @tracksegs = 0
+    def status
+      :conflict
+    end

 
 

-      lat = -1
-      lon = -1
-      ele = -1
-      date = DateTime.now();
-      gotlatlon = false
-      gotele = false
-      gotdate = false
+    def to_s
+      "Changeset mismatch: Provided #{@provided} but only #{@allowed} is allowed"
+    end
+  end

 
 

-      @file.rewind
+  # 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

 
 

-      parser = REXML::Parsers::SAX2Parser.new(@file)
+    def status
+      :bad_request
+    end

 
 

-      parser.listen( :start_element,  %w{ trkpt }) do |uri,localname,qname,attributes| 
-        lat = attributes['lat'].to_f
-        lon = attributes['lon'].to_f
-        gotlatlon = true
-        gotele = false
-        gotdate = false
-        @possible_points += 1
-      end
+    def to_s
+      "Unknown action #{@provided}, choices are create, modify, delete"
+    end
+  end

 
 

-      parser.listen( :characters, %w{ ele } ) do |text|
-        ele = text
-        gotele = true
-      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
+    end

 
 

-      parser.listen( :characters, %w{ time } ) do |text|
-        if text && text != ''
-          begin
-            date = DateTime.parse(text)
-            gotdate = true
-          rescue
-          end
-        end
-      end
+    def status
+      :bad_request
+    end

 
 

-      parser.listen( :end_element, %w{ trkseg } ) do |uri, localname, qname|
-        @tracksegs += 1
-      end
+    def to_s
+      "Cannot parse valid #{@model} from xml string #{@xml}. #{@message}"
+    end
+  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
-            yield Hash['latitude' => lat, 'longitude' => lon, 'timestamp' => date, 'altitude' => ele, 'segment' => @tracksegs]
-          end
-        end
-        gotlatlon = false
-        gotele = false
-        gotdate = false
-      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
+    end

 
 

-      parser.parse
+    attr_reader :provided, :latest, :id, :type
+
+    def status
+      :conflict

     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
-      proj = OSM::Mercator.new(min_lat, min_lon, max_lat, max_lon, width, height)
+    def to_s
+      "Version mismatch: Provided #{provided}, server had: #{latest} of #{type} #{id}"
+    end
+  end

 
 

-      linegc = Magick::Draw.new
-      linegc.stroke_linejoin('miter')
-      linegc.stroke_width(1)
-      linegc.stroke('#BBBBBB')
-      linegc.fill('#BBBBBB')
+  # 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
+    end

 
 

-      highlightgc = Magick::Draw.new
-      highlightgc.stroke_linejoin('miter')
-      highlightgc.stroke_width(3)
-      highlightgc.stroke('#000000')
-      highlightgc.fill('#000000')
+    attr_reader :type, :id, :tag_key

 
 

-      images = []
+    def status
+      :bad_request
+    end

 
 

-      frames.times do
-        image = Magick::Image.new(width, height) do |image|
-          image.background_color = 'white'
-          image.format = 'GIF'
-        end
+    def to_s
+      "Element #{@type}/#{@id} has duplicate tags with key #{@tag_key}"
+    end
+  end

 
 

-        images << image
-      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
+    end

 
 

-      oldpx = 0.0
-      oldpy = 0.0
+    attr_reader :id, :provided, :max

 
 

-      first = true
+    def status
+      :bad_request
+    end

 
 

-      m = 0
-      mm = 0
-      points do |p|
-        px = proj.x(p['longitude'])
-        py = proj.y(p['latitude'])
+    def to_s
+      "You tried to add #{provided} nodes to way #{id}, however only #{max} are allowed"
+    end
+  end

 
 

-        if m > 0
-          frames.times do |n|
-            if n == mm
-              gc = highlightgc.dup
-            else
-              gc = linegc.dup
-            end
+  ##
+  # raised when user input couldn't be parsed
+  class APIBadUserInput < APIError
+    def initialize(message)
+      @message = message
+    end

 
 

-            gc.line(px, py, oldpx, oldpy)
+    def status
+      :bad_request
+    end

 
 

-            gc.draw(images[n])
-          end
-        end
+    def to_s
+      @message
+    end
+  end

 
 

-        m += 1
-        if m > num_points.to_f / frames.to_f * (mm+1)
-          mm += 1
-        end
+  ##
+  # raised when bounding box is invalid
+  class APIBadBoundingBox < APIError
+    def initialize(message)
+      @message = message
+    end

 
 

-        oldpy = py
-        oldpx = px
-      end
+    def status
+      :bad_request
+    end

 
 

-      il = Magick::ImageList.new
+    def to_s
+      @message
+    end
+  end

 
 

-      images.each do |f|
-        il << f
-      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

 
 

-      il.delay = 50
-      il.format = 'GIF'
+    def status
+      :method_not_allowed
+    end

 
 

-      return il.to_blob
+    def to_s
+      "Only method #{@supported_method} is supported on this URI"

     end
     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
-      proj = OSM::Mercator.new(min_lat, min_lon, max_lat, max_lon, width, height)
+  ##
+  # raised when an API call takes too long
+  class APITimeoutError < APIError
+    def status
+      :request_timeout
+    end

 
 

-      gc = Magick::Draw.new
-      gc.stroke_linejoin('miter')
-      gc.stroke_width(1)
-      gc.stroke('#000000')
-      gc.fill('#000000')
+    def to_s
+      "Request timed out"
+    end
+  end

 
 

-      image = Magick::Image.new(width, height) do |image|
-        image.background_color = 'white'
-        image.format = 'GIF'
-      end
+  # Helper methods for going to/from mercator and lat/lng.
+  class Mercator
+    include Math

 
 

-      oldpx = 0.0
-      oldpy = 0.0
+    #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

 
 

-      first = true
+      xpad = width * scale - xsize
+      ypad = height * scale - ysize

 
 

-      points do |p|
-        px = proj.x(p['longitude'])
-        py = proj.y(p['latitude'])
+      @width = width
+      @height = height

 
 

-        gc.dup.line(px, py, oldpx, oldpy).draw(image) unless first
+      @tx = xsheet(min_lon) - xpad / 2
+      @ty = ysheet(min_lat) - ypad / 2

 
 

-        first = false
-        oldpy = py
-        oldpx = px
-      end
+      @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

 
 

-      return image.to_blob
+    def y(lat)
+      return @height - ((ysheet(lat) - @ty) / (@by - @ty) * @height)

     end
 
     end
 

+    def x(lon)
+      return  ((xsheet(lon) - @tx) / (@bx - @tx) * @width)
+    end

   end
 
   class GreatCircle
   end
 
   class GreatCircle


@@ -266,20 +327,32 @@ module OSM
     # 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))
     # 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))
+
+      begin
+        lonradius = 2 * asin(sqrt(sin(radius / 6372.795 / 2) ** 2 / cos(@lat) ** 2))
+      rescue Errno::EDOM
+        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
       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
       return { :minlat => minlat, :maxlat => maxlat, :minlon => minlon, :maxlon => maxlon }
     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 GeoRSS
     def initialize(feed_title='OpenStreetMap GPS Traces', feed_description='OpenStreetMap GPS Traces', feed_url='http://www.openstreetmap.org/traces/')
       @doc = XML::Document.new
   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' 
-      
+      @doc.encoding = XML::Encoding::UTF_8
+

       rss = XML::Node.new 'rss'
       @doc.root = rss
       rss['version'] = "2.0"
       rss = XML::Node.new 'rss'
       @doc.root = rss
       rss['version'] = "2.0"


@@ -364,31 +437,29 @@ module OSM
   class API
     def get_xml_doc
       doc = XML::Document.new
   class API
     def get_xml_doc
       doc = XML::Document.new

-      doc.encoding = 'UTF-8' 
+      doc.encoding = XML::Encoding::UTF_8

       root = XML::Node.new 'osm'
       root['version'] = API_VERSION
       root = XML::Node.new 'osm'
       root['version'] = API_VERSION

-      root['generator'] = 'OpenStreetMap server'
+      root['generator'] = GENERATOR

       doc.root = root
       return doc
     end
   end
 
       doc.root = root
       return doc
     end
   end
 

-  def self.IPLocation(ip_address)
+  def self.IPToCountry(ip_address)

     Timeout::timeout(4) do
     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
+      ipinfo = Quova::IpInfo.new(ip_address)
+
+      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
         end
       end

+      
+      return country.upcase

     end
 
     return nil
     end
 
     return nil


@@ -396,6 +467,18 @@ module OSM
     return nil
   end
 
     return nil
   end
 

+  def self.IPLocation(ip_address)
+    code = OSM.IPToCountry(ip_address)
+
+    unless code.nil?
+      country = Country.find_by_code(code)
+
+      return { :minlon => country.min_lon, :minlat => country.min_lat, :maxlon => country.max_lon, :maxlat => country.max_lat }
+    end
+
+    return nil
+  end
+

   # Construct a random token of a given length
   def self.make_token(length = 30)
     chars = 'abcdefghijklmnopqrtuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
   # Construct a random token of a given length
   def self.make_token(length = 30)
     chars = 'abcdefghijklmnopqrtuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'


@@ -425,72 +508,10 @@ module OSM
     return "#{tilesql} AND #{prefix}latitude BETWEEN #{minlat} AND #{maxlat} AND #{prefix}longitude BETWEEN #{minlon} AND #{maxlon}"
   end
 
     return "#{tilesql} AND #{prefix}latitude BETWEEN #{minlat} AND #{maxlat} AND #{prefix}longitude BETWEEN #{minlon} AND #{maxlon}"
   end
 

-  class Potlatch # crazy shit
-
-    # ----- getpresets
-    #            in:   none
-    #            does: reads tag preset menus, colours, and autocomplete config files
-    #        out:  [0] presets, [1] presetmenus, [2] presetnames,
-    #                          [3] colours, [4] casing, [5] areas, [6] autotags
-    #                          (all hashes)
-    def self.get_presets
-      RAILS_DEFAULT_LOGGER.info("  Message: getpresets")
-
-      # Read preset menus
-      presets={}
-      presetmenus={}; presetmenus['point']=[]; presetmenus['way']=[]; presetmenus['POI']=[]
-      presetnames={}; presetnames['point']={}; presetnames['way']={}; presetnames['POI']={}
-      presettype=''
-      presetcategory=''
-      #        StringIO.open(txt) do |file|
-      File.open("#{RAILS_ROOT}/config/potlatch/presets.txt") do |file|
-        file.each_line {|line|
-          t=line.chomp
-          if (t=~/(\w+)\/(\w+)/) then
-            presettype=$1
-            presetcategory=$2
-            presetmenus[presettype].push(presetcategory)
-            presetnames[presettype][presetcategory]=["(no preset)"]
-          elsif (t=~/^(.+):\s?(.+)$/) then
-            pre=$1; kv=$2
-            presetnames[presettype][presetcategory].push(pre)
-            presets[pre]={}
-            kv.split(',').each {|a|
-              if (a=~/^(.+)=(.*)$/) then presets[pre][$1]=$2 end
-            }
-          end
-        }
-      end
-
-      # Read colours/styling
-      colours={}; casing={}; areas={}
-      File.open("#{RAILS_ROOT}/config/potlatch/colours.txt") do |file|
-        file.each_line {|line|
-          t=line.chomp
-          if (t=~/(\w+)\s+([^\s]+)\s+([^\s]+)\s+([^\s]+)/) then
-            tag=$1
-            if ($2!='-') then colours[tag]=$2.hex end
-            if ($3!='-') then casing[tag]=$3.hex end
-            if ($4!='-') then areas[tag]=$4.hex end
-          end
-        }
-      end
-
-      # Read auto-complete
-      autotags={}; autotags['point']={}; autotags['way']={}; autotags['POI']={};
-      File.open("#{RAILS_ROOT}/config/potlatch/autocomplete.txt") do |file|
-        file.each_line {|line|
-          t=line.chomp
-          if (t=~/^(\w+)\/(\w+)\s+(.+)$/) then
-            tag=$1; type=$2; values=$3
-            if values=='-' then autotags[type][tag]=[]
-            else autotags[type][tag]=values.split(',').sort.reverse end
-          end
-        }
-      end
-
-      [presets,presetmenus,presetnames,colours,casing,areas,autotags]
-    end
+  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", "GB.yml") unless File.exist? file_name
+    YAML::load_file(file_name)

   end
 
 end
   end
 
 end