Potlatch 0.10

[rails.git] / app / models / way.rb

diff --git a/app/models/way.rb b/app/models/way.rb
index d0b961123ca729367706c913322b2a147f9c0a3b..59988d88bdc98d764e03f5781fbb7a476e4ec163 100644 (file)
--- a/app/models/way.rb
+++ b/app/models/way.rb
@@ -1,15 +1,19 @@
 class Way < ActiveRecord::Base
   require 'xml/libxml'
 
+  set_table_name 'current_ways'
+
   belongs_to :user
 
-  has_many :nodes, :through => :way_nodes, :order => 'sequence_id'
+  has_many :old_ways, :foreign_key => 'id', :order => 'version'
+
   has_many :way_nodes, :foreign_key => 'id', :order => 'sequence_id'
-  has_many :way_tags, :foreign_key => 'id'
+  has_many :nodes, :through => :way_nodes, :order => 'sequence_id'
 
-  has_many :old_ways, :foreign_key => 'id', :order => 'version'
+  has_many :way_tags, :foreign_key => 'id'
 
-  set_table_name 'current_ways'
+  has_many :containing_relation_members, :class_name => "RelationMember", :as => :member
+  has_many :containing_relations, :class_name => "Relation", :through => :containing_relation_members, :source => :relation, :extend => ObjectFinder
 
   def self.from_xml(xml, create=false)
     begin
@@ -210,10 +214,13 @@ class Way < ActiveRecord::Base
   # Delete the way and it's relations, but don't really delete it - set its visibility to false and update the history etc to maintain wiki-like functionality.
   def delete_with_relations_and_history(user)
     if self.visible
-      # omg FIXME
+         # FIXME
+         # this should actually delete the relations,
+         # not just throw a PreconditionFailed if it's a member of a relation!!
       if RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id",
                              :conditions => [ "visible = 1 AND member_type='way' and member_id=?", self.id])
         raise OSM::APIPreconditionFailedError
+      # end FIXME
       else
         self.user_id = user.id
         self.tags = []
@@ -229,13 +236,7 @@ class Way < ActiveRecord::Base
   # delete a way and it's nodes that aren't part of other ways, with history
   def delete_with_relations_and_nodes_and_history(user)
     
-    node_ids = self.nodes.collect {|node| node.id }
-    node_ids_not_to_delete = []
-    way_nodes = WayNode.find(:all, :conditions => "node_id in (#{node_ids.join(',')}) and id != #{self.id}")
-    
-    node_ids_not_to_delete = way_nodes.collect {|way_node| way_node.node_id}
-
-    node_ids_to_delete = node_ids - node_ids_not_to_delete
+    node_ids_to_delete = self.unique_nodes
 
     # delete the nodes not used by other ways
     node_ids_to_delete.each do |node_id|
@@ -250,4 +251,19 @@ class Way < ActiveRecord::Base
     self.delete_with_relations_and_history(user)
 
   end
+
+  # Find nodes that belong to this way only
+  def unique_nodes
+    node_ids = self.nodes.collect {|node| node.id }
+    if node_ids.length==0 then return [] end
+    node_ids_in_other_ways = []
+    way_nodes = WayNode.find(:all, :conditions => "node_id in (#{node_ids.join(',')}) and id != #{self.id}")
+    node_ids_in_other_ways = way_nodes.collect {|way_node| way_node.node_id}
+    return node_ids - node_ids_in_other_ways
+  end
+
+  # Temporary method to match interface to nodes
+  def tags_as_hash
+    return self.tags
+  end
 end