X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/bb4b682d0b88cfeb207566e328b4eab1a8bda6a3..ef7f3d800cbdd49b692df10d312e5fd880e2e938:/app/models/old_way.rb

diff --git a/app/models/old_way.rb b/app/models/old_way.rb
index d89b29621..c088ee129 100644
--- a/app/models/old_way.rb
+++ b/app/models/old_way.rb
@@ -1,101 +1,133 @@
 class OldWay < ActiveRecord::Base
-  set_table_name 'ways'
+  include ConsistencyValidations
+  include ObjectMetadata
 
-  belongs_to :user
+  self.table_name = "ways"
+  self.primary_keys = "way_id", "version"
+
+  # note this needs to be included after the table name changes, or
+  # the queries generated by Redactable will use the wrong table name.
+  include Redactable
+
+  belongs_to :changeset
+  belongs_to :redaction
+  belongs_to :current_way, :class_name => "Way", :foreign_key => "way_id"
+
+  has_many :old_nodes, :class_name => 'OldWayNode', :foreign_key => [:way_id, :version]
+  has_many :old_tags, :class_name => 'OldWayTag', :foreign_key => [:way_id, :version]
+
+  validates_associated :changeset
 
   def self.from_way(way)
     old_way = OldWay.new
     old_way.visible = way.visible
-    old_way.user_id = way.user_id
+    old_way.changeset_id = way.changeset_id
     old_way.timestamp = way.timestamp
-    old_way.id = way.id
-    old_way.segs = way.segs
+    old_way.way_id = way.id
+    old_way.version = way.version
+    old_way.nds = way.nds
     old_way.tags = way.tags
-    return old_way
+    old_way
   end
 
   def save_with_dependencies!
-
-    # dont touch this unless you really have figured out why it's called
-    # (Rails doesn't deal well with the old ways table (called 'ways') because
-    # it doesn't have a unique key. It knows how to insert and auto_increment
-    # id and get it back but we have that and we want to get the 'version' back
-    # we could add another column but thats a lot of data. No, set_primary_key
-    # doesn't work either.
     save!
-    clear_aggregation_cache
-    clear_association_cache
-    @attributes.update(OldWay.find(:first, :conditions => ['id = ? AND timestamp = ?', self.id, self.timestamp]).instance_variable_get('@attributes'))
-
-    # ok, you can touch from here on
 
-    self.tags.each do |k,v|
+    tags.each do |k, v|
       tag = OldWayTag.new
       tag.k = k
       tag.v = v
-      tag.id = self.id
-      tag.version = self.version
+      tag.way_id = way_id
+      tag.version = version
       tag.save!
     end
 
-    i = 0
-    self.segs.each do |n|
-      seg = OldWaySegment.new
-      seg.id = self.id
-      seg.segment_id = n
-      seg.version = self.version
-      seg.save!
+    sequence = 1
+    nds.each do |n|
+      nd = OldWayNode.new
+      nd.id = [way_id, version, sequence]
+      nd.node_id = n
+      nd.save!
+      sequence += 1
     end
   end
 
-  def segs
-    @segs = Array.new unless @segs
-    @segs
+  def nds
+    @nds ||= old_nodes.order(:sequence_id).collect(&:node_id)
   end
 
   def tags
-    @tags = Hash.new unless @tags
-    @tags
+    @tags ||= Hash[old_tags.collect { |t| [t.k, t.v] }]
+  end
+
+  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
 
-  def segs=(s)
-    @segs = s
+  # 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 tags=(t)
-    @tags = t
+  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] then id = -1; reuse = false end
+      end
+      points << [oldnode.lon, oldnode.lat, id, curnode.version, oldnode.tags_as_hash, reuse]
+    end
+    points
   end
 
-#  has_many :way_segments, :class_name => 'OldWaySegment', :foreign_key => 'id'
-#  has_many :way_tags, :class_name => 'OldWayTag', :foreign_key => 'id'
+  # Temporary method to match interface to nodes
+  def tags_as_hash
+    tags
+  end
 
-  def old_segments
-    OldWaySegment.find(:all, :conditions => ['id = ? AND version = ?', self.id, self.version])    
+  # Temporary method to match interface to ways
+  def way_nodes
+    old_nodes
   end
 
-  def old_tags
-    OldWayTag.find(:all, :conditions => ['id = ? AND version = ?', self.id, self.version])    
+  # Pretend we're not in any relations
+  def containing_relation_members
+    []
   end
 
-  def to_xml_node
-    el1 = XML::Node.new 'way'
-    el1['id'] = self.id.to_s
-    el1['visible'] = self.visible.to_s
-    el1['timestamp'] = self.timestamp.xmlschema
-    el1['user'] = self.user.display_name if self.user.data_public?
-    
-    self.old_segments.each do |seg| # FIXME need to make sure they come back in the right order
-      e = XML::Node.new 'seg'
-      e['id'] = seg.segment_id.to_s
-      el1 << e
-    end
- 
-    self.old_tags.each do |tag|
-      e = XML::Node.new 'tag'
-      e['k'] = tag.k
-      e['v'] = tag.v
-      el1 << e
-    end
-    return el1
-  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
 end