# get all the points
ordered_points = Tracepoint.bbox(bbox).joins(:trace).where(:gpx_files => { :visibility => %w[trackable identifiable] }).order("gpx_id DESC, trackid ASC, timestamp ASC")
unordered_points = Tracepoint.bbox(bbox).joins(:trace).where(:gpx_files => { :visibility => %w[public private] }).order("gps_points.latitude", "gps_points.longitude", "gps_points.timestamp")
- points = ordered_points.union_all(unordered_points).offset(offset).limit(Settings.tracepoints_per_page)
-
- doc = XML::Document.new
- doc.encoding = XML::Encoding::UTF_8
- root = XML::Node.new "gpx"
- root["version"] = "1.0"
- root["creator"] = "OpenStreetMap.org"
- root["xmlns"] = "http://www.topografix.com/GPX/1/0"
-
- doc.root = root
-
- # initialise these variables outside of the loop so that they
- # stay in scope and don't get free'd up by the GC during the
- # loop.
- gpx_id = -1
- trackid = -1
- track = nil
- trkseg = nil
- anon_track = nil
- anon_trkseg = nil
- gpx_file = nil
- timestamps = false
-
- points.each do |point|
- if gpx_id != point.gpx_id
- gpx_id = point.gpx_id
- trackid = -1
- gpx_file = Trace.find(gpx_id)
-
- if gpx_file.trackable?
- track = XML::Node.new "trk"
- doc.root << track
- timestamps = true
-
- if gpx_file.identifiable?
- track << (XML::Node.new("name") << gpx_file.name)
- track << (XML::Node.new("desc") << gpx_file.description)
- track << (XML::Node.new("url") << url_for(:controller => "/traces", :action => "show", :display_name => gpx_file.user.display_name, :id => gpx_file.id))
- end
- else
- # use the anonymous track segment if the user hasn't allowed
- # their GPX points to be tracked.
- timestamps = false
- if anon_track.nil?
- anon_track = XML::Node.new "trk"
- doc.root << anon_track
- end
- track = anon_track
- end
- end
-
- if trackid != point.trackid
- if gpx_file.trackable?
- trkseg = XML::Node.new "trkseg"
- track << trkseg
- trackid = point.trackid
- else
- if anon_trkseg.nil?
- anon_trkseg = XML::Node.new "trkseg"
- anon_track << anon_trkseg
- end
- trkseg = anon_trkseg
- end
- end
-
- trkseg << point.to_xml_node(:print_timestamp => timestamps)
- end
+ @points = ordered_points.union_all(unordered_points).offset(offset).limit(Settings.tracepoints_per_page).preload(:trace)
response.headers["Content-Disposition"] = "attachment; filename=\"tracks.gpx\""
- render :xml => doc.to_s
+ render :formats => [:gpx]
end
end
end