Support getting a way, and all the segments and nodes it depends on, via /way/:id/full

app/controllers/api_controller.rb

@@ -68,7 +68,7 @@ class ApiController < ApplicationController
     # get missing nodes if there are any
     nodes += Node.find(missing_nodes) if missing_nodes.length > 0
 
-    doc = OSM::API.get_xml_doc
+    doc = OSM::API.new.get_xml_doc
 
     # get ways
     # find which ways are needed

app/controllers/way_controller.rb

@@ -32,6 +32,41 @@ class WayController < ApplicationController
     render :nothing => true, :status => 500 # something went very wrong
   end
 
+  def full
+    unless Way.exists?(params[:id])
+      render :nothing => true, :status => 404
+      return
+    end
+
+    way = Way.find(params[:id])
+
+    unless way.visible
+        render :nothing => true, :status => 410
+        return
+    end
+
+	# In future, we might want to do all the data fetch in one step
+	seg_ids = way.segs + [-1]
+	segments = Segment.find_by_sql "select * from current_segments where visible = 1 and id IN (#{seg_ids.join(',')})"
+
+	node_ids = segments.collect {|segment| segment.node_a }
+	node_ids += segments.collect {|segment| segment.node_b }
+	node_ids += [-1]
+	nodes = Node.find(:all, :conditions => "visible = 1 AND id IN (#{node_ids.join(',')})")
+	
+	# Render
+	doc = OSM::API.new.get_xml_doc
+	nodes.each do |node|
+		doc.root << node.to_xml_node()
+	end
+	segments.each do |segment|
+		doc.root << segment.to_xml_node()
+	end
+	doc.root << way.to_xml_node()
+
+    render :text => doc.to_s
+  end
+
   def rest
     unless Way.exists?(params[:id])
       render :nothing => true, :status => 404

config/routes.rb

@@ -13,6 +13,7 @@ ActionController::Routing::Routes.draw do |map|
   
   map.connect "api/#{API_VERSION}/way/create", :controller => 'way', :action => 'create'
   map.connect "api/#{API_VERSION}/way/:id/history", :controller => 'old_way', :action => 'history', :id => nil
+  map.connect "api/#{API_VERSION}/way/:id/full", :controller => 'way', :action => 'full', :id => nil
   map.connect "api/#{API_VERSION}/way/:id", :controller => 'way', :action => 'rest', :id => nil
   map.connect "api/#{API_VERSION}/ways", :controller => 'way', :action => 'ways', :id => nil