Add extra visibility options for GPS traces, and enhance the API call
[rails.git] / app / controllers / api_controller.rb
index 564f718993d2642433a7a44bbdfe7f4385f5f9a6..3e9e627db7fe02c2b7f5777f32f1429b13e9ed1d 100644 (file)
@@ -11,10 +11,7 @@ class ApiController < ApplicationController
   # within the specified bounding box, and in the specified page.
   def trackpoints
     #retrieve the page number
   # within the specified bounding box, and in the specified page.
   def trackpoints
     #retrieve the page number
-    page = params['page'].to_i
-    unless page
-        page = 0;
-    end
+    page = params['page'].to_s.to_i
 
     unless page >= 0
         report_error("Page number must be greater than or equal to 0")
 
     unless page >= 0
         report_error("Page number must be greater than or equal to 0")
@@ -42,7 +39,7 @@ class ApiController < ApplicationController
     end
 
     # get all the points
     end
 
     # get all the points
-    points = Tracepoint.find_by_area(min_lat, min_lon, max_lat, max_lon, :offset => offset, :limit => APP_CONFIG['tracepoints_per_page'], :order => "timestamp DESC" )
+    points = Tracepoint.find_by_area(min_lat, min_lon, max_lat, max_lon, :offset => offset, :limit => APP_CONFIG['tracepoints_per_page'], :order => "gpx_id DESC, trackid ASC, timestamp ASC" )
 
     doc = XML::Document.new
     doc.encoding = XML::Encoding::UTF_8
 
     doc = XML::Document.new
     doc.encoding = XML::Encoding::UTF_8
@@ -53,14 +50,61 @@ class ApiController < ApplicationController
     
     doc.root = root
 
     
     doc.root = root
 
-    track = XML::Node.new 'trk'
-    doc.root << track
-
-    trkseg = XML::Node.new 'trkseg'
-    track << trkseg
+    # 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|
 
     points.each do |point|
-      trkseg << point.to_xml_node()
+      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 => 'trace', :action => 'view', :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(timestamps)
     end
 
     response.headers["Content-Disposition"] = "attachment; filename=\"map.osm\""
     end
 
     response.headers["Content-Disposition"] = "attachment; filename=\"map.osm\""