X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/d9e070e06956801aba2378c1b79b4d9f13ae12ee..9d2fed811fd37577bf5cce8e8fe03d2097852428:/app/models/node.rb diff --git a/app/models/node.rb b/app/models/node.rb index 677023179..775f1fd3b 100644 --- a/app/models/node.rb +++ b/app/models/node.rb @@ -2,22 +2,19 @@ class Node < ActiveRecord::Base require 'xml/libxml' include GeoRecord + include ConsistencyValidations + include NotRedactable - set_table_name 'current_nodes' - - validates_presence_of :user_id, :timestamp - validates_inclusion_of :visible, :in => [ true, false ] - validates_numericality_of :latitude, :longitude - validate :validate_position + self.table_name = "current_nodes" - belongs_to :user + belongs_to :changeset - has_many :old_nodes, :foreign_key => :id + has_many :old_nodes, :order => :version has_many :way_nodes has_many :ways, :through => :way_nodes - has_many :node_tags, :foreign_key => :id + has_many :node_tags has_many :old_way_nodes has_many :ways_via_history, :class_name=> "Way", :through => :old_way_nodes, :source => :way @@ -25,9 +22,21 @@ class Node < ActiveRecord::Base 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 + validates_presence_of :id, :on => :update + validates_presence_of :timestamp,:version, :changeset_id + validates_uniqueness_of :id + validates_inclusion_of :visible, :in => [ true, false ] + validates_numericality_of :latitude, :longitude, :changeset_id, :version, :integer_only => true + validates_numericality_of :id, :on => :update, :integer_only => true + validate :validate_position + validates_associated :changeset + + scope :visible, where(:visible => true) + scope :invisible, where(:visible => false) + # 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? + errors.add(:base, "Node is not in the world") unless in_world? end # @@ -36,7 +45,6 @@ class Node < ActiveRecord::Base # Also adheres to limitations such as within max_number_of_nodes # def self.search(bounding_box, tags = {}) - min_lon, min_lat, max_lon, max_lat = *bounding_box # @fixme a bit of a hack to search for only visible nodes # couldn't think of another to add to tags condition #conditions_hash = tags.merge({ 'visible' => 1 }) @@ -51,111 +59,144 @@ class Node < ActiveRecord::Base #end #conditions = keys.join(' AND ') - find_by_area(min_lat, min_lon, max_lat, max_lon, - :conditions => 'visible = 1', - :limit => APP_CONFIG['max_number_of_nodes']+1) + find_by_area(bounding_box, :conditions => {:visible => true}, + :limit => MAX_NUMBER_OF_NODES+1) end # Read in xml as text and return it's Node object representation def self.from_xml(xml, create=false) begin - p = XML::Parser.new - p.string = xml + p = XML::Parser.string(xml) doc = p.parse doc.find('//osm/node').each do |pt| return Node.from_xml_node(pt, create) end - rescue - return nil + raise OSM::APIBadXMLError.new("node", xml, "XML doesn't contain an osm/node element.") + rescue LibXML::XML::Error, ArgumentError => ex + raise OSM::APIBadXMLError.new("node", xml, ex.message) end end 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 + raise OSM::APIBadXMLError.new("node", pt, "lat missing") if pt['lat'].nil? + raise OSM::APIBadXMLError.new("node", pt, "lon missing") if pt['lon'].nil? + begin + node.lat = Float(pt['lat']) + rescue + raise OSM::APIBadXMLError.new("node", pt, "lat not a number") + end + begin + node.lon = Float(pt['lon']) + rescue + raise OSM::APIBadXMLError.new("node", pt, "lon not a number") + end + raise OSM::APIBadXMLError.new("node", pt, "Changeset id is missing") if pt['changeset'].nil? + node.changeset_id = pt['changeset'].to_i - return nil unless node.in_world? + raise OSM::APIBadUserInput.new("The node is outside this world") unless node.in_world? + + # version must be present unless creating + raise OSM::APIBadXMLError.new("node", pt, "Version is required when updating") 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 - end + raise OSM::APIBadXMLError.new("node", pt, "ID is required when updating.") if pt['id'].nil? + node.id = pt['id'].to_i + # .to_i will return 0 if there is no number that can be parsed. + # We want to make sure that there is no id with zero anyway + raise OSM::APIBadUserInput.new("ID of node cannot be zero when updating.") if node.id == 0 end - node.visible = pt['visible'] and pt['visible'] == 'true' + # We don't care about the time, as it is explicitly set on create/update/delete + # We don't care about the visibility as it is implicit based on the action + # and set manually before the actual delete + node.visible = true - if create - node.timestamp = Time.now - else - if pt['timestamp'] - node.timestamp = Time.parse(pt['timestamp']) - end - end - - tags = [] + # Start with no tags + node.tags = Hash.new + # Add in any tags from the XML pt.find('tag').each do |tag| + raise OSM::APIBadXMLError.new("node", pt, "tag is missing key") if tag['k'].nil? + raise OSM::APIBadXMLError.new("node", pt, "tag is missing value") if tag['v'].nil? node.add_tag_key_val(tag['k'],tag['v']) end return node end - def save_with_history! - t = Time.now - Node.transaction do - self.version += 1 - self.timestamp = t - self.save! - - # Create a NodeTag - 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! - end + ## + # the bounding box around a node, which is used for determining the changeset's + # bounding box + def bbox + BoundingBox.new(longitude, latitude, longitude, latitude) + end - # Create an OldNode - old_node = OldNode.from_node(self) - old_node.timestamp = t - old_node.save_with_dependencies! + # Should probably be renamed delete_from to come in line with update + def delete_with_history!(new_node, user) + unless self.visible + raise OSM::APIAlreadyDeletedError.new("node", new_node.id) end - end - def delete_with_history(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 - else - self.user_id = user.id - self.visible = 0 - save_with_history! - end - else - raise OSM::APIAlreadyDeletedError.new + # need to start the transaction here, so that the database can + # provide repeatable reads for the used-by checks. this means it + # shouldn't be possible to get race conditions. + Node.transaction do + self.lock! + check_consistency(self, new_node, user) + ways = Way.joins(:way_nodes).where(:visible => true, :current_way_nodes => { :node_id => id }).order(:id) + raise OSM::APIPreconditionFailedError.new("Node #{self.id} is still used by ways #{ways.collect { |w| w.id }.join(",")}.") unless ways.empty? + + rels = Relation.joins(:relation_members).where(:visible => true, :current_relation_members => { :member_type => "Node", :member_id => id }).order(:id) + raise OSM::APIPreconditionFailedError.new("Node #{self.id} is still used by relations #{rels.collect { |r| r.id }.join(",")}.") unless rels.empty? + + self.changeset_id = new_node.changeset_id + self.tags = {} + self.visible = false + + # update the changeset with the deleted position + changeset.update_bbox!(bbox) + + save_with_history! end end def update_from(new_node, user) - if new_node.version != version - raise OSM::APIVersionMismatchError.new(new_node.version, version) + Node.transaction do + self.lock! + check_consistency(self, new_node, user) + + # update changeset first + self.changeset_id = new_node.changeset_id + self.changeset = new_node.changeset + + # update changeset bbox with *old* position first + changeset.update_bbox!(bbox); + + # FIXME logic needs to be double checked + self.latitude = new_node.latitude + self.longitude = new_node.longitude + self.tags = new_node.tags + self.visible = true + + # update changeset bbox with *new* position + changeset.update_bbox!(bbox); + + save_with_history! end - - self.user_id = user.id - self.latitude = new_node.latitude - self.longitude = new_node.longitude - self.tags = new_node.tags + 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 @@ -165,23 +206,37 @@ class Node < ActiveRecord::Base return doc end - def to_xml_node(user_display_name_cache = nil) + def to_xml_node(changeset_cache = {}, user_display_name_cache = {}) el1 = XML::Node.new 'node' 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 + + if self.visible? + el1['lat'] = self.lat.to_s + el1['lon'] = self.lon.to_s + end + + if changeset_cache.key?(self.changeset_id) + # use the cache if available + else + changeset_cache[self.changeset_id] = self.changeset.user_id + end - user_display_name_cache = {} if user_display_name_cache.nil? + user_id = changeset_cache[self.changeset_id] - if user_display_name_cache and user_display_name_cache.key?(self.user_id) + if user_display_name_cache.key?(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[user_id] = self.changeset.user.display_name else - user_display_name_cache[self.user_id] = nil + user_display_name_cache[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[user_id].nil? + el1['user'] = user_display_name_cache[user_id] + el1['uid'] = user_id.to_s + end self.tags.each do |k,v| el2 = XML::Node.new('tag') @@ -192,7 +247,6 @@ class Node < ActiveRecord::Base el1['visible'] = self.visible.to_s el1['timestamp'] = self.timestamp.xmlschema - el1['version'] = self.version.to_s return el1 end @@ -216,9 +270,59 @@ class Node < ActiveRecord::Base 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("node", self.id, k) 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, placeholder_id = nil) + # nodes don't refer to anything, so there is nothing to do here + end + + private + def save_with_history! + t = Time.now.getutc + Node.transaction do + self.version += 1 + self.timestamp = t + self.save! + + # Create a NodeTag + tags = self.tags + NodeTag.delete_all(:node_id => self.id) + tags.each do |k,v| + tag = NodeTag.new + tag.node_id = self.id + tag.k = k + tag.v = v + 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 + end