X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/222d31e435f003ec59e84860d2fa5129449f69de..5a98d6e4f190d1b141695b8dd3bfb9d17bfcadee:/app/models/old_way.rb

diff --git a/app/models/old_way.rb b/app/models/old_way.rb
index 3f978d3d4..00642cdb3 100644
--- a/app/models/old_way.rb
+++ b/app/models/old_way.rb
@@ -1,14 +1,161 @@
 class OldWay < ActiveRecord::Base
+  include ConsistencyValidations
+  
   set_table_name 'ways'
+  set_primary_keys :way_id, :version
 
-  belongs_to :user
+  belongs_to :changeset
 
+  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.user_id = way.user_id
+    old_way.visible = way.visible
+    old_way.changeset_id = way.changeset_id
     old_way.timestamp = way.timestamp
-    old_way.id = way.id
+    old_way.way_id = way.id
+    old_way.version = way.version
+    old_way.nds = way.nds
+    old_way.tags = way.tags
     return 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.where(:way_id => self.way_id, :timestamp => self.timestamp).order("version DESC").first.instance_variable_get('@attributes'))
+
+    # ok, you can touch from here on
+
+    self.tags.each do |k,v|
+      tag = OldWayTag.new
+      tag.k = k
+      tag.v = v
+      tag.way_id = self.way_id
+      tag.version = self.version
+      tag.save!
+    end
+
+    sequence = 1
+    self.nds.each do |n|
+      nd = OldWayNode.new
+      nd.id = [self.way_id, self.version, sequence]
+      nd.node_id = n
+      nd.save!
+      sequence += 1
+    end
+  end
+
+  def nds
+    unless @nds
+      @nds = Array.new
+      OldWayNode.where(:way_id => self.way_id, :version => self.version).order(:sequence_id).each do |nd|
+        @nds += [nd.node_id]
+      end
+    end
+    @nds
+  end
+
+  def tags
+    unless @tags
+      @tags = Hash.new
+      OldWayTag.where(:way_id => self.way_id, :version => self.version).each do |tag|
+        @tags[tag.k] = tag.v
+      end
+    end
+    @tags = Hash.new unless @tags
+    @tags
+  end
+
+  def nds=(s)
+    @nds = s
+  end
+
+  def tags=(t)
+    @tags = t
+  end
+
+  def to_xml_node
+    el1 = XML::Node.new 'way'
+    el1['id'] = self.way_id.to_s
+    el1['visible'] = self.visible.to_s
+    el1['timestamp'] = self.timestamp.xmlschema
+    if self.changeset.user.data_public?
+      el1['user'] = self.changeset.user.display_name
+      el1['uid'] = self.changeset.user.id.to_s
+    end
+    el1['version'] = self.version.to_s
+    el1['changeset'] = self.changeset.id.to_s
+    
+    self.old_nodes.each do |nd| # FIXME need to make sure they come back in the right order
+      e = XML::Node.new 'nd'
+      e['ref'] = nd.node_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
+
+  # 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
+    points = []
+    self.nds.each do |n|
+      node = Node.find(n)
+      points << [node.lon, node.lat, n, node.version, node.tags_as_hash, node.visible]
+    end
+    points
+  end
+  
+  def get_nodes_revert(timestamp)
+    points=[]
+    self.nds.each do |n|
+      oldnode = OldNode.where('node_id = ? AND timestamp <= ?', n, timestamp).order("timestamp DESC").first
+      curnode = Node.find(n)
+      id = n; reuse = curnode.visible
+      if oldnode.lat != curnode.lat or oldnode.lon != curnode.lon or oldnode.tags != curnode.tags then
+        # node has changed: if it's in other ways, give it a new id
+        if curnode.ways-[self.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
+
+  # Temporary method to match interface to nodes
+  def tags_as_hash
+    return self.tags
+  end
+
+  # Temporary method to match interface to ways
+  def way_nodes
+    return self.old_nodes
+  end
+
+  # Pretend we're not in any relations
+  def containing_relation_members
+    return []
+  end
 end