X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/df11677afd55ef592330a05c43ed4baa81b60572..b7b2b502cf2b119208e3c1f79e4a4e38cc0edcc5:/app/models/node.rb diff --git a/app/models/node.rb b/app/models/node.rb index acd251918..e926e06a2 100644 --- a/app/models/node.rb +++ b/app/models/node.rb @@ -1,28 +1,36 @@ -class Node < GeoRecord +class Node < ActiveRecord::Base require 'xml/libxml' + include GeoRecord + include ConsistencyValidations + set_table_name 'current_nodes' - - validates_presence_of :user_id, :timestamp + + validates_presence_of :changeset_id, :timestamp validates_inclusion_of :visible, :in => [ true, false ] validates_numericality_of :latitude, :longitude validate :validate_position + belongs_to :changeset + has_many :old_nodes, :foreign_key => :id + has_many :way_nodes + has_many :ways, :through => :way_nodes + has_many :node_tags, :foreign_key => :id - belongs_to :user - + + has_many :old_way_nodes + has_many :ways_via_history, :class_name=> "Way", :through => :old_way_nodes, :source => :way + + has_many :containing_relation_members, :class_name => "RelationMember", :as => :member + has_many :containing_relations, :class_name => "Relation", :through => :containing_relation_members, :source => :relation, :extend => ObjectFinder + + # Sanity check the latitude and longitude and add an error if it's broken def validate_position errors.add_to_base("Node is not in the world") unless in_world? end - def in_world? - return false if self.lat < -90 or self.lat > 90 - return false if self.lon < -180 or self.lon > 180 - return true - end - # # Search for nodes matching tags within bounding_box # @@ -45,7 +53,7 @@ class Node < GeoRecord #conditions = keys.join(' AND ') find_by_area(min_lat, min_lon, max_lat, max_lon, - :conditions => 'visible = 1', + :conditions => {:visible => true}, :limit => APP_CONFIG['max_number_of_nodes']+1) end @@ -57,7 +65,7 @@ class Node < GeoRecord doc = p.parse doc.find('//osm/node').each do |pt| - return Node.from_xml_node(pt, create) + return Node.from_xml_node(pt, create) end rescue return nil @@ -67,25 +75,31 @@ class Node < GeoRecord def self.from_xml_node(pt, create=false) node = Node.new - node.version = pt['version'] node.lat = pt['lat'].to_f node.lon = pt['lon'].to_f + node.changeset_id = pt['changeset'].to_i return nil unless node.in_world? + # version must be present unless creating + return nil unless create or not pt['version'].nil? + node.version = create ? 0 : pt['version'].to_i + unless create if pt['id'] != '0' - node.id = pt['id'].to_i + node.id = pt['id'].to_i end end - node.visible = pt['visible'] and pt['visible'] == 'true' + # visible if it says it is, or as the default if the attribute + # is missing. + node.visible = pt['visible'].nil? or pt['visible'] == 'true' if create node.timestamp = Time.now else if pt['timestamp'] - node.timestamp = Time.parse(pt['timestamp']) + node.timestamp = Time.parse(pt['timestamp']) end end @@ -98,6 +112,12 @@ class Node < GeoRecord return node end + ## + # the bounding box around a node + def bbox + [ longitude, latitude, longitude, latitude ] + end + def save_with_history! t = Time.now Node.transaction do @@ -109,30 +129,42 @@ class Node < GeoRecord tags = self.tags NodeTag.delete_all(['id = ?', self.id]) tags.each do |k,v| - tag = NodeTag.new - tag.k = k - tag.v = v - tag.id = self.id - tag.save! + tag = NodeTag.new + tag.k = k + tag.v = v + tag.id = self.id + tag.save! end # Create an OldNode old_node = OldNode.from_node(self) old_node.timestamp = t old_node.save_with_dependencies! + + # tell the changeset we updated one element only + changeset.add_changes! 1 + + # save the changeset in case of bounding box updates + changeset.save! end end - def delete_with_history(user) + # Should probably be renamed delete_from to come in line with update + def delete_with_history!(new_node, user) if self.visible - if WayNode.find(:first, :joins => "INNER JOIN current_ways ON current_ways.id = current_way_nodes.id", :conditions => [ "current_ways.visible = 1 AND current_way_nodes.node_id = ?", self.id ]) - raise OSM::APIPreconditionFailedError.new - elsif RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id", :conditions => [ "visible = 1 AND member_type='node' and member_id=?", self.id]) - raise OSM::APIPreconditionFailedError.new + check_consistency(self, new_node, user) + if WayNode.find(:first, :joins => "INNER JOIN current_ways ON current_ways.id = current_way_nodes.id", :conditions => [ "current_ways.visible = ? AND current_way_nodes.node_id = ?", true, self.id ]) + raise OSM::APIPreconditionFailedError.new + elsif RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id", :conditions => [ "visible = ? AND member_type='node' and member_id=? ", true, self.id]) + raise OSM::APIPreconditionFailedError.new else - self.user_id = user.id - self.visible = 0 - save_with_history! + self.changeset_id = new_node.changeset_id + self.visible = false + + # update the changeset with the deleted position + changeset.update_bbox!(bbox) + + save_with_history! end else raise OSM::APIAlreadyDeletedError.new @@ -140,11 +172,32 @@ class Node < GeoRecord end def update_from(new_node, user) - self.user_id = user.id + check_consistency(self, new_node, user) + + # update changeset with *old* position first + changeset.update_bbox!(bbox); + + # FIXME logic needs to be double checked + self.changeset_id = new_node.changeset_id self.latitude = new_node.latitude self.longitude = new_node.longitude self.tags = new_node.tags self.visible = true + + # update changeset with *new* position + changeset.update_bbox!(bbox); + + save_with_history! + end + + def create_with_history(user) + check_create_consistency(self, user) + self.version = 0 + self.visible = true + + # update the changeset to include the new location + changeset.update_bbox!(bbox) + save_with_history! end @@ -159,18 +212,23 @@ class Node < GeoRecord el1['id'] = self.id.to_s el1['lat'] = self.lat.to_s el1['lon'] = self.lon.to_s - + el1['version'] = self.version.to_s + el1['changeset'] = self.changeset_id.to_s + user_display_name_cache = {} if user_display_name_cache.nil? - if user_display_name_cache and user_display_name_cache.key?(self.user_id) + if user_display_name_cache and user_display_name_cache.key?(self.changeset.user_id) # use the cache if available - elsif self.user.data_public? - user_display_name_cache[self.user_id] = self.user.display_name + elsif self.changeset.user.data_public? + user_display_name_cache[self.changeset.user_id] = self.changeset.user.display_name else - user_display_name_cache[self.user_id] = nil + user_display_name_cache[self.changeset.user_id] = nil end - el1['user'] = user_display_name_cache[self.user_id] unless user_display_name_cache[self.user_id].nil? + if not user_display_name_cache[self.changeset.user_id].nil? + el1['user'] = user_display_name_cache[self.changeset.user_id] + el1['uid'] = self.changeset.user_id.to_s + end self.tags.each do |k,v| el2 = XML::Node.new('tag') @@ -181,16 +239,11 @@ class Node < GeoRecord el1['visible'] = self.visible.to_s el1['timestamp'] = self.timestamp.xmlschema - el1['version'] = self.version.to_s return el1 end def tags_as_hash - hash = {} - Tags.split(self.tags) do |k,v| - hash[k] = v - end - hash + return tags end def tags @@ -209,9 +262,26 @@ class Node < GeoRecord def add_tag_key_val(k,v) @tags = Hash.new unless @tags + + # duplicate tags are now forbidden, so we can't allow values + # in the hash to be overwritten. + raise OSM::APIDuplicateTagsError.new if @tags.include? k + @tags[k] = v end + ## + # are the preconditions OK? this is mainly here to keep the duck + # typing interface the same between nodes, ways and relations. + def preconditions_ok? + in_world? + end + ## + # dummy method to make the interfaces of node, way and relation + # more consistent. + def fix_placeholders!(id_map) + # nodes don't refer to anything, so there is nothing to do here + end end