app/views/api/tracepoints/index.gpx.builder

   1 xml.instruct!
   2
   3 xml.gpx("version" => "1.0",
   4         "creator" => "OpenStreetMap.org",
   5         "xmlns" => "http://www.topografix.com/GPX/1/0") do
   6   # initialise these variables outside of the loop so that they
   7   # stay in scope and don't get free'd up by the GC during the
   8   # loop.
   9   gpx_id = -1
  10   trackid = -1
  11   tracks = []
  12   track = nil
  13   trkseg = nil
  14   anon_track = nil
  15   anon_trkseg = nil
  16
  17   @points.each do |point|
  18     if gpx_id != point.gpx_id
  19       gpx_id = point.gpx_id
  20       trackid = -1
  21
  22       if point.trace.trackable?
  23         track = {}
  24         track["trksegs"] = []
  25         tracks << track
  26
  27         if point.trace.identifiable?
  28           track["name"] = point.trace.name
  29           track["desc"] = point.trace.description
  30           track["url"] = url_for(:controller => "/traces", :action => "show", :display_name => point.trace.user.display_name, :id => point.trace.id)
  31         end
  32       else
  33         # use the anonymous track segment if the user hasn't allowed
  34         # their GPX points to be tracked.
  35         if anon_track.nil?
  36           anon_track = {}
  37           anon_track["trksegs"] = []
  38           tracks << anon_track
  39         end
  40         track = anon_track
  41       end
  42     end
  43
  44     if trackid != point.trackid
  45       if point.trace.trackable?
  46         trkseg = []
  47         track["trksegs"] << trkseg
  48         trackid = point.trackid
  49       else
  50         if anon_trkseg.nil?
  51           anon_trkseg = []
  52           anon_track["trksegs"] << anon_trkseg
  53         end
  54         trkseg = anon_trkseg
  55       end
  56     end
  57
  58     trkseg << point
  59   end
  60
  61   tracks.each do |trk|
  62     xml.trk do
  63       if trk.key?("name")
  64         xml.name trk["name"]
  65         xml.desc trk["desc"]
  66         xml.url trk["url"]
  67       end
  68       trk["trksegs"].each do |trksg|
  69         xml.trkseg do
  70           trksg.each do |tracepoint|
  71             xml.trkpt("lat" => tracepoint.lat.to_s, "lon" => tracepoint.lon.to_s) do
  72               xml.time tracepoint.timestamp.xmlschema if tracepoint.trace.trackable?
  73             end
  74           end
  75         end
  76       end
  77     end
  78   end
  79 end