X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/93dab8a1272f8c807da841c0a55b37f74b65b8c3..7bdfa0afc9a3c7cafba702e9bc05e9310053da68:/lib/osm.rb

diff --git a/lib/osm.rb b/lib/osm.rb
index f9f77d1b5..916cf4d6a 100644
--- a/lib/osm.rb
+++ b/lib/osm.rb
@@ -5,12 +5,14 @@ module OSM
   #
   # This would print every latitude value:
   #
-  # gpx = OSM:GPXImporter.new('somefile.gpx')
+  # gpx = OSM::GPXImporter.new('somefile.gpx')
   # gpx.points {|p| puts p['latitude']}
 
   require 'time'
   require 'rexml/parsers/sax2parser'
   require 'rexml/text'
+  require 'xml/libxml'
+  require 'digest/md5'
   require 'RMagick'
 
   class Mercator
@@ -21,10 +23,11 @@ module OSM
       @clat = lat
       @clon = lon
       @degrees_per_pixel = degrees_per_pixel
+      @degrees_per_pixel = 0.0000000001 if @degrees_per_pixel < 0.0000000001
       @width = width
       @height = height
-      @dlon = width / 2 * degrees_per_pixel
-      @dlat = height / 2 * degrees_per_pixel  * cos(@clat * PI / 180)
+      @dlon = width / 2 * @degrees_per_pixel
+      @dlat = height / 2 * @degrees_per_pixel  * cos(@clat * PI / 180)
 
       @tx = xsheet(@clon - @dlon)
       @ty = ysheet(@clat - @dlat)
@@ -61,29 +64,30 @@ module OSM
 
 
   class GPXImporter
+    # FIXME swap REXML for libXML
     attr_reader :possible_points
     attr_reader :actual_points
     attr_reader :tracksegs
 
     def initialize(filename)
       @filename = filename
-      @possible_points = 0
-      @actual_points = 0
-      @tracksegs = 0
     end
 
     def points
-      file = File.new(@filename)
-      parser = REXML::Parsers::SAX2Parser.new( file )
+      @possible_points = 0
+      @actual_points = 0
+      @tracksegs = 0
 
       lat = -1
       lon = -1
       ele = -1
-      date = Time.now();
+      date = DateTime.now();
       gotlatlon = false
       gotele = false
       gotdate = false
 
+      parser = REXML::Parsers::SAX2Parser.new(File.new(@filename))
+
       parser.listen( :start_element,  %w{ trkpt }) do |uri,localname,qname,attributes| 
         lat = attributes['lat'].to_f
         lon = attributes['lon'].to_f
@@ -98,8 +102,11 @@ module OSM
 
       parser.listen( :characters, %w{ time } ) do |text|
         if text && text != ''
-          date = Time.parse(text)
-          gotdate = true
+          begin
+            date = DateTime.parse(text)
+            gotdate = true
+          rescue
+          end
         end
       end
 
@@ -112,33 +119,46 @@ module OSM
           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]
+            yield Hash['latitude' => lat, 'longitude' => lon, 'timestamp' => date, 'altitude' => ele, 'segment' => @tracksegs]
           end
         end
         gotlatlon = false
         gotele = false
         gotdate = false
       end
+
       parser.parse
     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)
 
+      linegc = Magick::Draw.new
+      linegc.stroke_linejoin('miter')
+      linegc.stroke_width(1)
+      linegc.stroke('#BBBBBB')
+      linegc.fill('#BBBBBB')
+
+      highlightgc = Magick::Draw.new
+      highlightgc.stroke_linejoin('miter')
+      highlightgc.stroke_width(3)
+      highlightgc.stroke('#000000')
+      highlightgc.fill('#000000')
+
       images = []
 
       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
+        image = Magick::Image.new(width, height) do |image|
+          image.background_color = 'white'
+          image.format = 'GIF'
+        end
+
+        images << image
       end
 
       oldpx = 0.0
@@ -151,84 +171,256 @@ module OSM
       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')
-          images[n].line(px, py, oldpx, oldpy ) unless first
+
+        if m > 0
+          frames.times do |n|
+            if n == mm
+              gc = highlightgc.dup
+            else
+              gc = linegc.dup
+            end
+
+            gc.line(px, py, oldpx, oldpy)
+
+            gc.draw(images[n])
+          end
         end
-        images[mm].stroke_width(3)
-        images[mm].stroke('#000000')
-        images[mm].fill('#000000')
-        images[mm].line(px, py, oldpx, oldpy ) unless first
 
-        m +=1
+        m += 1
         if m > num_points.to_f / frames.to_f * (mm+1)
           mm += 1
         end
-        first = false
+
         oldpy = py
         oldpx = px
       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
+      images.each do |f|
+        il << f
       end
 
       il.delay = 50
       il.format = 'GIF'
+
       return il.to_blob
     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)
 
-      images = []
-
-      gc =  Magick::Draw.new
+      gc = Magick::Draw.new
       gc.stroke_linejoin('miter')
+      gc.stroke_width(1)
+      gc.stroke('#000000')
+      gc.fill('#000000')
+
+      image = Magick::Image.new(width, height) do |image|
+        image.background_color = 'white'
+        image.format = 'GIF'
+      end
 
       oldpx = 0.0
       oldpy = 0.0
 
       first = true
 
-      gc.stroke_width(1)
-      gc.stroke('#000000')
-      gc.fill('#000000')
-
       points do |p|
         px = proj.x(p['longitude'])
         py = proj.y(p['latitude'])
-        gc.line(px, py, oldpx, oldpy ) unless first
+
+        gc.dup.line(px, py, oldpx, oldpy).draw(image) unless first
+
         first = false
         oldpy = py
         oldpx = px
       end
 
-      canvas = Magick::Image.new(width, height) {
-        self.background_color = 'white'
-      }
-      begin
-        gc.draw(canvas)
-      rescue ArgumentError
+      return image.to_blob
+    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
+      return 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
+  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
-      canvas.format = 'GIF'
-      return canvas.to_blob
+
+      if longitude
+        lon_el = XML::Node.new 'geo:long'
+        lon_el << longitude.to_s
+        item << lon_el
+      end
+
+      @channel << item
+    end
+
+    def to_s
+      return @doc.to_s
     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.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
+    end
+
+    return nil
+  rescue Exception
+    return nil
+  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
+  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)
+  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
 
+    return "#{tilesql} AND #{prefix}latitude BETWEEN #{minlat} AND #{maxlat} AND #{prefix}longitude BETWEEN #{minlon} AND #{maxlon}"
   end
 end