X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/ddd5b4cf19a92582fd114914be5bd5a04d3522a7..64ecd02f0b74d2251e30fc1c97fdf1aa60f53e90:/app/models/way.rb

diff --git a/app/models/way.rb b/app/models/way.rb
index ff2e64370..958944200 100644
--- a/app/models/way.rb
+++ b/app/models/way.rb
@@ -1,14 +1,19 @@
 class Way < ActiveRecord::Base
   require 'xml/libxml'
 
+  set_table_name 'current_ways'
+
   belongs_to :user
 
+  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
@@ -49,9 +54,12 @@ class Way < ActiveRecord::Base
 
   # Find a way given it's ID, and in a single SQL call also grab its nodes
   #
+  
   # You can't pull in all the tags too unless we put a sequence_id on the way_tags table and have a multipart key
   def self.find_eager(id)
     way = Way.find(id, :include => {:way_nodes => :node})
+    #If waytag had a multipart key that was real, you could do this:
+    #way = Way.find(id, :include => [:way_tags, {:way_nodes => :node}])
   end
 
   # Find a way given it's ID, and in a single SQL call also grab its nodes and tags
@@ -177,14 +185,13 @@ class Way < ActiveRecord::Base
 
       WayNode.delete_all(['id = ?', self.id])
 
-      i = 1
+      sequence = 1
       nds.each do |n|
         nd = WayNode.new
-        nd.id = self.id
+        nd.id = [self.id, sequence]
         nd.node_id = n
-        nd.sequence_id = i
         nd.save!
-        i += 1
+        sequence += 1
       end
     end
 
@@ -204,4 +211,57 @@ class Way < ActiveRecord::Base
     return true
   end
 
+  # 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
+	  # 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 = []
+        self.nds = []
+        self.visible = false
+        self.save_with_history!
+      end
+    else
+      raise OSM::APIAlreadyDeletedError
+    end
+  end
+
+  # 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)
+    # delete the nodes not used by other ways
+    self.unshared_node_ids.each do |node_id|
+      n = Node.find(node_id)
+      n.user_id = user.id
+      n.visible = false
+      n.save_with_history!
+    end
+    
+    self.user_id = user.id
+
+    self.delete_with_relations_and_history(user)
+  end
+
+  # Find nodes that belong to this way only
+  def unshared_node_ids
+    node_ids = self.nodes.collect { |node| node.id }
+
+    unless node_ids.empty?
+      way_nodes = WayNode.find(:all, :conditions => "node_id in (#{node_ids.join(',')}) and id != #{self.id}")
+      node_ids = node_ids - way_nodes.collect { |way_node| way_node.node_id }
+    end
+
+    return node_ids
+  end
+
+  # Temporary method to match interface to nodes
+  def tags_as_hash
+    return self.tags
+  end
 end