Optimise finding of relations, partially reversing change #8443 but in

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

diff --git a/app/controllers/way_controller.rb b/app/controllers/way_controller.rb
index 10e0f844278ecfc3856f7eb9f93ef11bc6f20157..3b6491cf0b3ceda5ed90ee7e1da5e49579c6af21 100644 (file)
--- a/app/controllers/way_controller.rb
+++ b/app/controllers/way_controller.rb
@@ -1,7 +1,10 @@
 class WayController < 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
 
   def create
@@ -9,95 +12,133 @@ class WayController < ApplicationController
       way = Way.from_xml(request.raw_post, true)
 
       if way
-        way.user_id = @user.id
-        unless way.preconditions_ok? # are the segments (and their nodes) visible?
-          render :nothing => true, :status => 412
-          return
-        end
-
-        if way.save_with_history
-          render :text => way.id.to_s
-          return
+        if !way.preconditions_ok?
+          render :text => "", :status => :precondition_failed
         else
-          render :nothing => true, :status => 500
-          return
+          way.user_id = @user.id
+          way.save_with_history!
+
+          render :text => way.id.to_s, :content_type => "text/plain"
         end
-        return
       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
-    unless Way.exists?(params[:id])
-      render :nothing => true, :status => 404
-      return
-    end
+  def read
+    begin
+      way = Way.find(params[:id])
 
-    way = Way.find(params[:id])
-    case request.method
+      response.headers['Last-Modified'] = way.timestamp.rfc822
 
-    when :get
-      unless way.visible
-        render :nothing => true, :status => 410
-        return
+      if way.visible
+        render :text => way.to_xml.to_s, :content_type => "text/xml"
+      else
+        render :text => "", :status => :gone
       end
-      render :text => way.to_xml.to_s
+    rescue ActiveRecord::RecordNotFound
+      render :nothing => true, :status => :not_found
+    end
+  end
 
-    when :delete
-      unless way.visible
-        render :nothing => true, :status => 410
-        return
+  def update
+    begin
+      way = Way.find(params[:id])
+      new_way = Way.from_xml(request.raw_post)
+
+      if new_way and new_way.id == way.id
+        if !new_way.preconditions_ok?
+          render :text => "", :status => :precondition_failed
+        else
+          way.user_id = @user.id
+          way.tags = new_way.tags
+          way.nds = new_way.nds
+          way.visible = true
+          way.save_with_history!
+
+          render :nothing => true
+        end
+      else
+        render :nothing => true, :status => :bad_request
       end
+    rescue ActiveRecord::RecordNotFound
+      render :nothing => true, :status => :not_found
+    end
+  end
+
+  # This is the API call to delete a way
+  def delete
+    begin
+      way = Way.find(params[:id])
+      way.delete_with_relations_and_history(@user)
 
-      way.visible = false
-      way.save_with_history
+      # if we get here, all is fine, otherwise something will catch below.  
       render :nothing => true
-      return
-    when :put
-      way = Way.from_xml(request.raw_post)
+    rescue OSM::APIAlreadyDeletedError
+      render :text => "", :status => :gone
+    rescue OSM::APIPreconditionFailedError
+      render :text => "", :status => :precondition_failed
+    rescue ActiveRecord::RecordNotFound
+      render :nothing => true, :status => :not_found
+    end
+  end
 
-      if way
-        way_in_db = Way.find(way.id)
-        if way_in_db
-          way_in_db.user_id = @user.id
-          way_in_db.tags = way.tags
-          way_in_db.segs = way.segs
-          way_in_db.timestamp = way.timestamp
-          way_in_db.visible = true
-          if way_in_db.save_with_history
-            render :text => way.id
-          else
-            render :nothing => true, :status => 500
-          end
-          return
-        else
-          render :nothing => true, :status => 404 # way doesn't exist yet
+  def full
+    begin
+      way = Way.find(params[:id])
+
+      if way.visible
+        nd_ids = way.nds + [-1]
+        nodes = Node.find(:all, :conditions => "visible = 1 AND id IN (#{nd_ids.join(',')})")
+
+        # Render
+        doc = OSM::API.new.get_xml_doc
+        nodes.each do |node|
+          doc.root << node.to_xml_node()
         end
+        doc.root << way.to_xml_node()
+
+        render :text => doc.to_s, :content_type => "text/xml"
       else
-        render :nothing => true, :status => 400 # if we got here the doc didnt parse
-        return
+        render :text => "", :status => :gone
       end
+    rescue ActiveRecord::RecordNotFound
+      render :nothing => true, :status => :not_found
     end
   end
 
   def ways
-    response.headers["Content-Type"] = 'application/xml'
-    ids = params['ways'].split(',').collect {|w| w.to_i }
+    begin
+      ids = params['ways'].split(',').collect { |w| w.to_i }
+    rescue
+      ids = []
+    end
+
     if ids.length > 0
-      waylist = Way.find(ids)
-      doc = get_xml_doc
-      waylist.each do |way|
+      doc = OSM::API.new.get_xml_doc
+
+      Way.find(ids).each do |way|
         doc.root << way.to_xml_node
-      end 
-      render :text => doc.to_s
+      end
+
+      render :text => doc.to_s, :content_type => "text/xml"
     else
-      render :nothing => true, :status => 400
+      render :nothing => true, :status => :bad_request
     end
   end
 
+  def ways_for_node
+    wayids = WayNode.find(:all, :conditions => ['node_id = ?', params[:id]]).collect { |ws| ws.id[0] }.uniq
+
+    doc = OSM::API.new.get_xml_doc
+
+    Way.find(wayids).each do |way|
+      doc.root << way.to_xml_node
+    end
+
+    render :text => doc.to_s, :content_type => "text/xml"
+  end
 end