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

diff --git a/app/controllers/node_controller.rb b/app/controllers/node_controller.rb
index 62987cf9433b35d0d8b8c3b770615e6758465cbc..33e0ed3ee876f358c77c3e93dada13bd753ae716 100644 (file)
--- a/app/controllers/node_controller.rb
+++ b/app/controllers/node_controller.rb
@@ -1,107 +1,77 @@
+# The NodeController is the RESTful interface to Node objects
+
 class NodeController < ApplicationController
   require 'xml/libxml'
 
-  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]
+  before_filter :require_allow_write_api, :only => [:create, :update, :delete]
+  before_filter :require_public_data, :only => [:create, :update, :delete]
+  before_filter :check_api_writable, :only => [:create, :update, :delete]
+  before_filter :check_api_readable, :except => [:create, :update, :delete]
   after_filter :compress_output
+  around_filter :api_call_handle_error, :api_call_timeout
 
+  # Create a node from XML.
   def create
-    if request.put?
-      node = Node.from_xml(request.raw_post, true)
+    assert_method :put
 
-      if node
-        node.user_id = @user.id
-        node.visible = true
-        node.save_with_history!
+    node = Node.from_xml(request.raw_post, true)
 
-        render :text => node.id.to_s, :content_type => "text/plain"
-      else
-        render :nothing => true, :status => :bad_request
-      end
-    else
-      render :nothing => true, :status => :method_not_allowed
-    end
+    # Assume that Node.from_xml has thrown an exception if there is an error parsing the xml
+    node.create_with_history @user
+    render :text => node.id.to_s, :content_type => "text/plain"
   end
 
+  # Dump the details on a node given in params[:id]
   def read
-    begin
-      node = Node.find(params[:id])
-
-      if node.visible
-        render :text => node.to_xml.to_s, :content_type => "text/xml"
-       else
-        render :nothing => true, :status => :gone
-      end
-    rescue ActiveRecord::RecordNotFound
-      render :nothing => true, :status => :not_found
+    node = Node.find(params[:id])
+    if node.visible?
+      response.headers['Last-Modified'] = node.timestamp.rfc822
+      render :text => node.to_xml.to_s, :content_type => "text/xml"
+    else
+      render :text => "", :status => :gone
     end
   end
-
+  
+  # Update a node from given XML
   def update
-    begin
-      node = Node.find(params[:id])
-
-      if node.visible
-        new_node = Node.from_xml(request.raw_post)
-
-        if new_node and new_node.id == node.id
-          node.user_id = @user.id
-          node.latitude = new_node.latitude 
-          node.longitude = new_node.longitude
-          node.tags = new_node.tags
-          node.save_with_history!
-
-          render :nothing => true
-        else
-          render :nothing => true, :status => :bad_request
-        end
-      else
-        render :nothing => true, :status => :gone
-      end
-    rescue ActiveRecord::RecordNotFound
-      render :nothing => true, :status => :not_found
+    node = Node.find(params[:id])
+    new_node = Node.from_xml(request.raw_post)
+       
+    unless new_node and new_node.id == node.id
+      raise OSM::APIBadUserInput.new("The id in the url (#{node.id}) is not the same as provided in the xml (#{new_node.id})")
     end
+    node.update_from(new_node, @user)
+    render :text => node.version.to_s, :content_type => "text/plain"
   end
 
+  # Delete a node. Doesn't actually delete it, but retains its history 
+  # in a wiki-like way. We therefore treat it like an update, so the delete
+  # method returns the new version number.
   def delete
-    begin
-      node = Node.find(params[:id])
-
-      if node.visible
-        if WayNode.find(:first, :joins => "INNER JOIN current_ways ON current_ways.id = current_way_nodes.id", :conditions => [ "current_ways.visible = 1 AND current_way_nodes.node_id = ?", node.id ])
-          render :nothing => true, :status => :precondition_failed
-        elsif RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id", :conditions => [ "visible = 1 AND member_type='node' and member_id=?", params[:id]])
-          render :nothing => true, :status => :precondition_failed
-        else
-          node.user_id = @user.id
-          node.visible = 0
-          node.save_with_history!
-
-          render :nothing => true
-        end
-      else
-        render :nothing => true, :status => :gone
-      end
-    rescue ActiveRecord::RecordNotFound
-      render :nothing => true, :status => :not_found
+    node = Node.find(params[:id])
+    new_node = Node.from_xml(request.raw_post)
+    
+    unless new_node and new_node.id == node.id
+      raise OSM::APIBadUserInput.new("The id in the url (#{node.id}) is not the same as provided in the xml (#{new_node.id})")
     end
+    node.delete_with_history!(new_node, @user)
+    render :text => node.version.to_s, :content_type => "text/plain"
   end
 
+  # Dump the details on many nodes whose ids are given in the "nodes" parameter.
   def nodes
     ids = params['nodes'].split(',').collect { |n| n.to_i }
 
-    if ids.length > 0
-      doc = OSM::API.new.get_xml_doc
-
-      Node.find(ids).each do |node|
-        doc.root << node.to_xml_node
-      end 
+    if ids.length == 0
+      raise OSM::APIBadUserInput.new("No nodes were given to search for")
+    end
+    doc = OSM::API.new.get_xml_doc
 
-      render :text => doc.to_s, :content_type => "text/xml"
-    else
-      render :nothing => true, :status => :bad_request
+    Node.find(ids).each do |node|
+      doc.root << node.to_xml_node
     end
+
+    render :text => doc.to_s, :content_type => "text/xml"
   end
 end