+ require 'xml/libxml'
+
+ before_filter :authorize
+
+ def create
+ if request.put?
+ segment = Segment.from_xml(request.raw_post, true)
+
+ if segment
+
+ segment.user_id = @user.id
+
+ a = Node.find(segment.node_a.to_i)
+ b = Node.find(segment.node_b.to_i)
+
+ unless a and a.visible and b and b.visible
+ render :nothing => true, :status => 400
+ end
+
+ if segment.save_with_history
+ render :text => segment.id
+ else
+ render :nothing => true, :status => 500
+ end
+ return
+
+ else
+ render :nothing => true, :status => 400 # if we got here the doc didnt parse
+ return
+ end
+ end
+
+ render :nothing => true, :status => 500 # something went very wrong
+ end
+
+ def rest
+ unless Segment.exists?(params[:id])
+ render :nothing => true, :status => 400
+ return
+ end
+
+ segment = Segment.find(params[:id])
+
+ case request.method
+
+ when :get
+ render :text => segment.to_xml.to_s
+ return
+
+ when :delete
+ if segment.visible
+ segment.visible = 0
+ segment.save_with_history
+ render :nothing => true
+ else
+ render :nothing => true, :status => 410
+ end
+
+ when :put
+ new_segment = Segment.from_xml(request.raw_post)
+
+ segment.timestamp = Time.now
+ segment.user_id = @user.id
+
+ segment.node_a = new_segment.node_a
+ segment.node_b = new_segment.node_b
+ segment.tags = new_segment.tags
+ segment.visible = new_segment.visible
+
+ if segment.id == new_segment.id and segment.save_with_history
+ render :nothing => true, :status => 200
+ else
+ render :nothing => true, :status => 500
+ end
+ return
+ end
+
+ end
+
+ def history
+ segment = Segment.find(params[:id])
+
+ unless segment
+ render :nothing => true, :staus => 404
+ return
+ end
+
+ doc = XML::Document.new
+ doc.encoding = 'UTF-8'
+ root = XML::Node.new 'osm'
+ root['version'] = '0.4'
+ root['generator'] = 'OpenStreetMap server'
+ doc.root = root
+
+ segment.old_segments.each do |old_segment|
+ el1 = XML::Node.new 'segment'
+ el1['id'] = old_segment.id.to_s
+ el1['from'] = old_segment.node_a.to_s
+ el1['to'] = old_segment.node_b.to_s
+ Segment.split_tags(el1, old_segment.tags)
+ el1['visible'] = old_segment.visible.to_s
+ el1['timestamp'] = old_segment.timestamp.xmlschema
+ root << el1
+ end
+
+ render :text => doc.to_s
+ end
+
+