prevent update of any object without providing the correct/current

[rails.git] / app / controllers / node_controller.rb

diff --git a/app/controllers/node_controller.rb b/app/controllers/node_controller.rb
index 27c21c4815a78fea0da3c0846ac8d72559ba82b1..fa6759c3b5debb59e601a7bd519d401ac352dfd9 100644 (file)
--- a/app/controllers/node_controller.rb
+++ b/app/controllers/node_controller.rb
@@ -1,105 +1,99 @@
+# The NodeController is the RESTful interface to Node objects
+
 class NodeController < ApplicationController
   require 'xml/libxml'
 
-  before_filter :authorize
+  session :off
+  before_filter :authorize, :only => [:create, :update, :delete]
+  before_filter :check_write_availability, :only => [:create, :update, :delete]
+  before_filter :check_read_availability, :except => [:create, :update, :delete]
   after_filter :compress_output
 
+  # Create a node from XML.
   def create
-    response.headers["Content-Type"] = 'application/xml'
     if request.put?
-      node = nil
-      begin
-        node = Node.from_xml(request.raw_post, true)
-      rescue
-        render :text => "XML didn't parse", :status => 400 # if we got here the doc didnt parse
-        return
-      end
+      node = Node.from_xml(request.raw_post, true)
 
       if node
+        node.version = 0
         node.user_id = @user.id
-        node.visible = 1
-        if node.save_with_history
-          render :text => node.id
-        else
-          render :nothing => true, :status => 500
-        end
-        return
+        node.visible = true
+        node.save_with_history!
 
+        render :text => node.id.to_s, :content_type => "text/plain"
       else
-        render :nothing => true, :status => 400 # if we got here the doc didnt parse
-        return
+        render :nothing => true, :status => :bad_request
       end
+    else
+      render :nothing => true, :status => :method_not_allowed
     end
-
-    render :nothing => true, :status => 500 # something went very wrong
   end
 
-  def rest
-    response.headers["Content-Type"] = 'application/xml'
-    unless Node.exists?(params[:id])
-      render :nothing => true, :status => 404
-      return
-    end
-
-    node = Node.find(params[:id])
-
-    case request.method
-
-    when :get
-      unless node
-        render :nothing => true, :status => 500
-        return
-      end
-
-      unless node.visible
-        render :nothing => true, :status => 410
-        return
-      end
-
-      render :text => node.to_xml.to_s
-      return
-
-    when :delete
+  # Dump the details on a node given in params[:id]
+  def read
+    begin
+      node = Node.find(params[:id])
       if node.visible
-        node.visible = 0
-        node.save_with_history
-        render :nothing => true
-      else
-        render :nothing => true, :status => 410
+        response.headers['Last-Modified'] = node.timestamp.rfc822
+        render :text => node.to_xml.to_s, :content_type => "text/xml"
+       else
+        render :text => "", :status => :gone
       end
+    rescue ActiveRecord::RecordNotFound
+      render :nothing => true, :status => :not_found
+    end
+  end
 
-    when :put
+  # Update a node from given XML
+  def update
+    begin
+      node = Node.find(params[:id])
       new_node = Node.from_xml(request.raw_post)
+      if new_node.version != node.version
+        render :text => "Version mismatch: Provided " + new_node.version.to_s + ", server had: " + node.version.to_s, :status => :bad_request
+        return
+      end  
 
-      node.timestamp = Time.now
-      node.user_id = @user.id
-
-      node.latitude = new_node.latitude 
-      node.longitude = new_node.longitude
-      node.tags = new_node.tags
-
-      if node.id == new_node.id and node.save_with_history
-        render :nothing => true, :status => 200
+      if new_node and new_node.id == node.id
+        node.update_from(new_node, @user)
+        render :text => node.version.to_s, :content_type => "text/plain"
       else
-        render :nothing => true, :status => 500
+        render :nothing => true, :status => :bad_request
       end
-      return
+    rescue ActiveRecord::RecordNotFound
+      render :nothing => true, :status => :not_found
     end
+  end
 
+  # Delete a node. Doesn't actually delete it, but retains its history in a wiki-like way.
+  # FIXME remove all the fricking SQL
+  def delete
+    begin
+      node = Node.find(params[:id])
+      node.delete_with_history(@user)
+    rescue ActiveRecord::RecordNotFound
+      render :nothing => true, :status => :not_found
+    rescue OSM::APIAlreadyDeletedError
+      render :text => "", :status => :gone
+    rescue OSM::APIPreconditionFailedError
+      render :text => "", :status => :precondition_failed
+    end
   end
 
+  # WTF does this do?
   def nodes
-    response.headers["Content-Type"] = 'application/xml'
-    ids = params['nodes'].split(',').collect {|n| n.to_i }
+    ids = params['nodes'].split(',').collect { |n| n.to_i }
+
     if ids.length > 0
-      nodelist = Node.find(ids)
-      doc = get_xml_doc
-      nodelist.each do |node|
+      doc = OSM::API.new.get_xml_doc
+
+      Node.find(ids).each do |node|
         doc.root << node.to_xml_node
       end 
-      render :text => doc.to_s
+
+      render :text => doc.to_s, :content_type => "text/xml"
     else
-      render :nothing => true, :status => 400
+      render :nothing => true, :status => :bad_request
     end
   end
 end