+ attr_writer :nds
+
+ attr_writer :tags
+
+ def to_xml_node(changeset_cache = {}, user_display_name_cache = {})
+ el = XML::Node.new "way"
+ el["id"] = way_id.to_s
+
+ add_metadata_to_xml_node(el, self, changeset_cache, user_display_name_cache)
+
+ old_nodes.each do |nd| # FIXME: need to make sure they come back in the right order
+ node_el = XML::Node.new "nd"
+ node_el["ref"] = nd.node_id.to_s
+ el << node_el
+ end
+
+ add_tags_to_xml_node(el, old_tags)
+
+ el
+ end
+
+ # Read full version of old way
+ # For get_nodes_undelete, uses same nodes, even if they've moved since
+ # For get_nodes_revert, allocates new ids
+ # Currently returns Potlatch-style array
+ # where [5] indicates whether latest version is usable as is (boolean)
+ # (i.e. is it visible? are we actually reverting to an earlier version?)
+
+ def get_nodes_undelete
+ nds.collect do |n|
+ node = Node.find(n)
+ [node.lon, node.lat, n, node.version, node.tags_as_hash, node.visible]
+ end
+ end
+
+ def get_nodes_revert(timestamp)
+ points = []
+ nds.each do |n|
+ oldnode = OldNode.where("node_id = ? AND timestamp <= ?", n, timestamp).unredacted.order("timestamp DESC").first
+ curnode = Node.find(n)
+ id = n
+ reuse = curnode.visible
+ if oldnode.lat != curnode.lat || oldnode.lon != curnode.lon || oldnode.tags != curnode.tags
+ # node has changed: if it's in other ways, give it a new id
+ if curnode.ways - [way_id]
+ id = -1
+ reuse = false
+ end
+ end
+ points << [oldnode.lon, oldnode.lat, id, curnode.version, oldnode.tags_as_hash, reuse]
+ end
+ points
+ end
+
+ # Temporary method to match interface to ways
+ def way_nodes
+ old_nodes
+ end
+
+ # Pretend we're not in any relations
+ def containing_relation_members
+ []
+ end
+
+ # check whether this element is the latest version - that is,
+ # has the same version as its "current" counterpart.
+ def is_latest_version?
+ current_way.version == version
+ end