X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/db1e02adb5f8eea1fc47bfe4e7b116359d92eaa2..419455bbb997ac6d06a49b336ad32871bc32cbbc:/app/models/old_way.rb diff --git a/app/models/old_way.rb b/app/models/old_way.rb index 1aac4ebff..591389243 100644 --- a/app/models/old_way.rb +++ b/app/models/old_way.rb @@ -1,65 +1,193 @@ class OldWay < ActiveRecord::Base - set_table_name 'ways' + include ConsistencyValidations - 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.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.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 end - def save - t = Time.now - self.timestamp = t - self.save - - WayTag.delete_all(['id = ?', self.id]) + 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 = WayTag.new + tag = OldWayTag.new tag.k = k tag.v = v - tag.id = self.id - tag.save + tag.way_id = self.way_id + tag.version = self.version + tag.save! end - WaySegment.delete_all(['id = ?', self.id]) - - i = 0 - self.segs.each do |n| - seg = WaySegment.new - seg.id = self.id - seg.segment_id = n - seg.sequence_id = i - seg.save - i += 1 + 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 - - old_way = OldWay.from_way(self) - old_way.save end - def segs - @segs = Array.new unless @segs - @segs + 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 segs=(s) - @segs = s + def nds=(s) + @nds = s end def tags=(t) @tags = t end + def to_xml_node(changeset_cache = {}, user_display_name_cache = {}) + el1 = XML::Node.new 'way' + el1['id'] = self.way_id.to_s + el1['visible'] = self.visible.to_s + el1['timestamp'] = self.timestamp.xmlschema + el1['version'] = self.version.to_s + el1['changeset'] = self.changeset_id.to_s + + if changeset_cache.key?(self.changeset_id) + # use the cache if available + else + changeset_cache[self.changeset_id] = self.changeset.user_id + end + + user_id = changeset_cache[self.changeset_id] + + if user_display_name_cache.key?(user_id) + # use the cache if available + elsif self.changeset.user.data_public? + user_display_name_cache[user_id] = self.changeset.user.display_name + else + user_display_name_cache[user_id] = nil + end + + if not user_display_name_cache[user_id].nil? + el1['user'] = user_display_name_cache[user_id] + el1['uid'] = user_id.to_s + end + + el1['redacted'] = self.redaction.id.to_s if self.redacted? + + 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).unredacted.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 + + # 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 == self.version + end end