api06: Preliminary support for diff uploading. This will not return anything
[rails.git] / app / models / relation.rb
index 0d10b77284358cd4975d8c2b7a76b7b1716c176d..2c155e9e1f73772b397285cc19562c7f82f01411 100644 (file)
@@ -16,32 +16,38 @@ class Relation < ActiveRecord::Base
       p.string = xml
       doc = p.parse
 
-      relation = Relation.new
-
       doc.find('//osm/relation').each do |pt|
-        if !create and pt['id'] != '0'
-          relation.id = pt['id'].to_i
-        end
+       relation = Relation.from_xml_node pt, create
+      end
+    rescue
+      relation = nil
+    end
 
-        if create
-          relation.timestamp = Time.now
-          relation.visible = true
-        else
-          if pt['timestamp']
-            relation.timestamp = Time.parse(pt['timestamp'])
-          end
-        end
+    return relation
+  end
 
-        pt.find('tag').each do |tag|
-          relation.add_tag_keyval(tag['k'], tag['v'])
-        end
+  def self.from_xml_node(pt, create=false)
+    relation = Relation.new
 
-        pt.find('member').each do |member|
-          relation.add_member(member['type'], member['ref'], member['role'])
-        end
+    if !create and pt['id'] != '0'
+      relation.id = pt['id'].to_i
+    end
+
+    if create
+      relation.timestamp = Time.now
+      relation.visible = true
+    else
+      if pt['timestamp']
+       relation.timestamp = Time.parse(pt['timestamp'])
       end
-    rescue
-      relation = nil
+    end
+
+    pt.find('tag').each do |tag|
+      relation.add_tag_keyval(tag['k'], tag['v'])
+    end
+
+    pt.find('member').each do |member|
+      relation.add_member(member['type'], member['ref'], member['role'])
     end
 
     return relation
@@ -58,6 +64,7 @@ class Relation < ActiveRecord::Base
     el1['id'] = self.id.to_s
     el1['visible'] = self.visible.to_s
     el1['timestamp'] = self.timestamp.xmlschema
+    el1['version'] = self.version.to_s
 
     user_display_name_cache = {} if user_display_name_cache.nil?
     
@@ -102,42 +109,46 @@ class Relation < ActiveRecord::Base
     return el1
   end 
 
+    
+  # collect relationships. currently done in one big block at the end;
+  # may need to move this upwards if people want automatic completion of
+  # relationships, i.e. deliver referenced objects like we do with ways... 
+  # FIXME: rip out the fucking SQL
   def self.find_for_nodes_and_ways(node_ids, way_ids)
-    # collect relationships. currently done in one big block at the end;
-    # may need to move this upwards if people want automatic completion of
-    # relationships, i.e. deliver referenced objects like we do with ways...
-       return [] if node_ids.empty? and node_ids.empty?
-    relations = Array.new
+    relations = []
+
     if node_ids.length > 0
-        relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
+      relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
             "e.visible=1 and " +
             "em.id = e.id and em.member_type='node' and em.member_id in (#{node_ids.join(',')})")
     end
     if way_ids.length > 0
-        relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
+      relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
             "e.visible=1 and " +
             "em.id = e.id and em.member_type='way' and em.member_id in (#{way_ids.join(',')})")
     end
+
+    relations # if you don't do this then it returns nil and not []
   end
 
 
   # FIXME is this really needed?
   def members
     unless @members
-        @members = Array.new
-        self.relation_members.each do |member|
-            @members += [[member.member_type,member.member_id,member.member_role]]
-        end
+      @members = Array.new
+      self.relation_members.each do |member|
+        @members += [[member.member_type,member.member_id,member.member_role]]
+      end
     end
     @members
   end
 
   def tags
     unless @tags
-        @tags = Hash.new
-        self.relation_tags.each do |tag|
-            @tags[tag.k] = tag.v
-        end
+      @tags = Hash.new
+      self.relation_tags.each do |tag|
+        @tags[tag.k] = tag.v
+      end
     end
     @tags
   end
@@ -163,32 +174,29 @@ class Relation < ActiveRecord::Base
   def save_with_history!
     Relation.transaction do
       t = Time.now
+      self.version += 1
       self.timestamp = t
       self.save!
 
       tags = self.tags
-
       RelationTag.delete_all(['id = ?', self.id])
-
       tags.each do |k,v|
-       tag = RelationTag.new
-       tag.k = k
-       tag.v = v
-       tag.id = self.id
-       tag.save!
+        tag = RelationTag.new
+        tag.k = k
+        tag.v = v
+        tag.id = self.id
+        tag.save!
       end
 
       members = self.members
-
       RelationMember.delete_all(['id = ?', self.id])
-
       members.each do |n|
-       mem = RelationMember.new
-       mem.id = self.id
-       mem.member_type = n[0];
-       mem.member_id = n[1];
-       mem.member_role = n[2];
-       mem.save!
+        mem = RelationMember.new
+        mem.id = self.id
+        mem.member_type = n[0];
+        mem.member_id = n[1];
+        mem.member_role = n[2];
+        mem.save!
       end
 
       old_relation = OldRelation.from_relation(self)