Make sure we load OpenLayers resources from the right place.

[rails.git] / lib / osm.rb

diff --git a/lib/osm.rb b/lib/osm.rb
index ea2a581645d797e7fd677cf31629863f569b2967..b14a7f3e8ed32b03b6574123cc7ac401eb82a46c 100644 (file)
--- a/lib/osm.rb
+++ b/lib/osm.rb
@@ -12,6 +12,7 @@ module OSM
   require 'rexml/parsers/sax2parser'
   require 'rexml/text'
   require 'xml/libxml'
+  require 'digest/md5'
   require 'RMagick'
 
   class Mercator
@@ -91,6 +92,8 @@ module OSM
         lat = attributes['lat'].to_f
         lon = attributes['lon'].to_f
         gotlatlon = true
+        gotele = false
+        gotdate = false
         @possible_points += 1
       end
 
@@ -137,16 +140,27 @@ module OSM
       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
@@ -159,43 +173,39 @@ 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')
-        #  puts "A #{px},#{py} - #{oldpx},#{oldpy}"
-          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
-      #  puts "B #{px},#{py} - #{oldpx},#{oldpy}"
-        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
 
@@ -206,39 +216,34 @@ module OSM
       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
-       # puts "C #{px},#{py} - #{oldpx},#{oldpy}"
+
+        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
-      end
-      canvas.format = 'GIF'
-      return canvas.to_blob
+      return image.to_blob
     end
 
   end
@@ -295,7 +300,7 @@ module OSM
       image = XML::Node.new 'image'
       @channel << image
       url = XML::Node.new 'url'
-      url << 'http://www.openstreetmap.org/feeds/mag_map-rss2.0.png'
+      url << 'http://www.openstreetmap.org/images/mag_map-rss2.0.png'
       image << url
       title = XML::Node.new 'title'
       title << "OpenStreetMap"
@@ -373,7 +378,7 @@ module OSM
     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 = "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|
@@ -403,4 +408,21 @@ module OSM
 
     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