X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/603af36a83421a961afddc1604eabfea97f625ba..d841d3d1352b31e7a2196b07f4ae335e6bca8380:/app/controllers/relation_controller.rb

diff --git a/app/controllers/relation_controller.rb b/app/controllers/relation_controller.rb
index 8019fb56a..93573b95f 100644
--- a/app/controllers/relation_controller.rb
+++ b/app/controllers/relation_controller.rb
@@ -1,43 +1,41 @@
 class RelationController < ApplicationController
   require 'xml/libxml'
 
+  session :off
   before_filter :authorize, :only => [:create, :update, :delete]
-  before_filter :check_availability, :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
-    if request.put?
-      relation = Relation.from_xml(request.raw_post, true)
-
-      if relation
-        if !relation.preconditions_ok?
-          render :nothing => true, :status => :precondition_failed
-        else
-          relation.user_id = @user.id
-
-          if relation.save_with_history
-            render :text => relation.id.to_s, :content_type => "text/plain"
-          else
-            render :text => "save error", :status => :internal_server_error
-          end
-        end
+    begin
+      if request.put?
+        relation = Relation.from_xml(request.raw_post, true)
+
+        # We assume that an exception has been thrown if there was an error 
+        # generating the relation
+        #if relation
+          relation.create_with_history @user
+          render :text => relation.id.to_s, :content_type => "text/plain"
+        #else
+         # render :text => "Couldn't get turn the input into a relation.", :status => :bad_request
+        #end
       else
-        render :nothing => true, :status => :bad_request
+        render :nothing => true, :status => :method_not_allowed
       end
-    else
-      render :nothing => true, :status => :method_not_allowed
+    rescue OSM::APIError => ex
+      render ex.render_opts
     end
   end
 
   def read
     begin
       relation = Relation.find(params[:id])
-
+      response.headers['Last-Modified'] = relation.timestamp.rfc822
       if relation.visible
         render :text => relation.to_xml.to_s, :content_type => "text/xml"
       else
-        render :nothing => true, :status => :gone
+        render :text => "", :status => :gone
       end
     rescue ActiveRecord::RecordNotFound
       render :nothing => true, :status => :not_found
@@ -47,100 +45,109 @@ class RelationController < ApplicationController
   end
 
   def update
+    logger.debug request.raw_post
     begin
       relation = Relation.find(params[:id])
+      new_relation = Relation.from_xml(request.raw_post)
 
-      if relation.visible
-        new_relation = Relation.from_xml(request.raw_post)
-
-        if new_relation and new_relation.id == relation.id
-          if !new_relation.preconditions_ok?
-            render :nothing => true, :status => :precondition_failed
-          else
-            relation.user_id = @user.id
-            relation.tags = new_relation.tags
-            relation.members = new_relation.members
-            relation.visible = true
-
-            if relation.save_with_history
-              render :nothing => true
-            else
-              render :nothing => true, :status => :internal_server_error
-            end
-          end
-        else
-          render :nothing => true, :status => :bad_request
-        end
+      if new_relation and new_relation.id == relation.id
+        relation.update_from new_relation, @user
+        render :text => relation.version.to_s, :content_type => "text/plain"
       else
-        render :nothing => true, :status => :gone
+        render :nothing => true, :status => :bad_request
       end
     rescue ActiveRecord::RecordNotFound
       render :nothing => true, :status => :not_found
-    rescue
-      render :nothing => true, :status => :internal_server_error
+    rescue OSM::APIError => ex
+      render ex.render_opts
     end
   end
 
   def delete
-#XXX check if member somewhere!
     begin
       relation = Relation.find(params[:id])
-
-      if relation.visible
-        if RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id", :conditions => [ "visible = 1 AND member_type='relation' and member_id=?", params[:id]])
-          render :nothing => true, :status => :precondition_failed
-        else
-          relation.user_id = @user.id
-          relation.tags = []
-          relation.members = []
-          relation.visible = false
-
-          if relation.save_with_history
-            render :nothing => true
-          else
-            render :nothing => true, :status => :internal_server_error
-          end
-        end
+      new_relation = Relation.from_xml(request.raw_post)
+      if new_relation and new_relation.id == relation.id
+        relation.delete_with_history!(new_relation, @user)
+        render :text => relation.version.to_s, :content_type => "text/plain"
       else
-        render :nothing => true, :status => :gone
+        render :nothing => true, :status => :bad_request
       end
+    rescue OSM::APIError => ex
+      render ex.render_opts
     rescue ActiveRecord::RecordNotFound
       render :nothing => true, :status => :not_found
-    rescue
-      render :nothing => true, :status => :internal_server_error
     end
   end
 
+  # -----------------------------------------------------------------
+  # full
+  # 
+  # input parameters: id
+  #
+  # returns XML representation of one relation object plus all its
+  # members, plus all nodes part of member ways
+  # -----------------------------------------------------------------
   def full
     begin
       relation = Relation.find(params[:id])
 
       if relation.visible
-        # In future, we might want to do all the data fetch in one step
-        seg_ids = relation.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(node_ids, :conditions => "visible = TRUE")
 
-        # Render
+        # first collect nodes, ways, and relations referenced by this relation.
+        
+        ways = Way.find_by_sql("select w.* from current_ways w,current_relation_members rm where "+
+            "rm.member_type='way' and rm.member_id=w.id and rm.id=#{relation.id}");
+        nodes = Node.find_by_sql("select n.* from current_nodes n,current_relation_members rm where "+
+            "rm.member_type='node' and rm.member_id=n.id and rm.id=#{relation.id}");
+        # note query is built to exclude self just in case.
+        relations = Relation.find_by_sql("select r.* from current_relations r,current_relation_members rm where "+
+            "rm.member_type='relation' and rm.member_id=r.id and rm.id=#{relation.id} and r.id<>rm.id");
+
+        # now additionally collect nodes referenced by ways. Note how we recursively 
+        # evaluate ways but NOT relations.
+
+        node_ids = nodes.collect {|node| node.id }
+        way_node_ids = ways.collect { |way|
+           way.way_nodes.collect { |way_node| way_node.node_id }
+        }
+        way_node_ids.flatten!
+        way_node_ids.uniq
+        way_node_ids -= node_ids
+        nodes += Node.find(way_node_ids)
+    
+        # create XML.
         doc = OSM::API.new.get_xml_doc
+        visible_nodes = {}
+        user_display_name_cache = {}
+
         nodes.each do |node|
-          doc.root << node.to_xml_node()
+          if node.visible? # should be unnecessary if data is consistent.
+            doc.root << node.to_xml_node(user_display_name_cache)
+            visible_nodes[node.id] = node
+          end
         end
-        segments.each do |segment|
-          doc.root << segment.to_xml_node()
+        ways.each do |way|
+          if way.visible? # should be unnecessary if data is consistent.
+            doc.root << way.to_xml_node(visible_nodes, user_display_name_cache)
+          end
         end
-        doc.root << relation.to_xml_node()
-
+        relations.each do |rel|
+          if rel.visible? # should be unnecessary if data is consistent.
+            doc.root << rel.to_xml_node(user_display_name_cache)
+          end
+        end
+        # finally add self and output
+        doc.root << relation.to_xml_node(user_display_name_cache)
         render :text => doc.to_s, :content_type => "text/xml"
+
       else
         render :nothing => true, :status => :gone
       end
+
     rescue ActiveRecord::RecordNotFound
       render :nothing => true, :status => :not_found
+
     rescue
       render :nothing => true, :status => :internal_server_error
     end
@@ -158,23 +165,31 @@ class RelationController < ApplicationController
 
       render :text => doc.to_s, :content_type => "text/xml"
     else
-      render :nothing => true, :status => :bad_request
+      render :text => "You need to supply a comma separated list of ids.", :status => :bad_request
     end
+  rescue ActiveRecord::RecordNotFound
+    render :text => "Could not find one of the relations", :status => :not_found
+  end
+
+  def relations_for_way
+    relations_for_object("way")
+  end
+  def relations_for_node
+    relations_for_object("node")
+  end
+  def relations_for_relation
+    relations_for_object("relation")
   end
 
   def relations_for_object(objtype)
-    relationids = RelationMember.find(:all, :conditions => ['member_type=? and member_id=?', objtype, params[:id]]).collect { |ws| ws.id }.uniq
+    relationids = RelationMember.find(:all, :conditions => ['member_type=? and member_id=?', objtype, params[:id]]).collect { |ws| ws.id[0] }.uniq
 
-    if relationids.length > 0
-      doc = OSM::API.new.get_xml_doc
+    doc = OSM::API.new.get_xml_doc
 
-      Relation.find(relationids).each do |relation|
-        doc.root << relation.to_xml_node
-      end
-
-      render :text => doc.to_s, :content_type => "text/xml"
-    else
-      render :nothing => true, :status => :bad_request
+    Relation.find(relationids).each do |relation|
+      doc.root << relation.to_xml_node if relation.visible
     end
+
+    render :text => doc.to_s, :content_type => "text/xml"
   end
 end