-class Node < GeoRecord
+class Node < ActiveRecord::Base
require 'xml/libxml'
- set_table_name 'current_nodes'
+ include GeoRecord
+ include ConsistencyValidations
+ include NotRedactable
+ include ObjectMetadata
+
+ self.table_name = "current_nodes"
+
+ belongs_to :changeset
+
+ has_many :old_nodes, -> { order(:version) }
+
+ has_many :way_nodes
+ has_many :ways, :through => :way_nodes
+
+ has_many :node_tags
- validates_presence_of :user_id, :timestamp
+ 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
+
+ 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
+ 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
- has_many :old_nodes, :foreign_key => :id
- has_many :way_nodes
- has_many :node_tags, :foreign_key => :id
- belongs_to :user
-
- 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
+ scope :visible, -> { where(:visible => true) }
+ scope :invisible, -> { where(:visible => false) }
- #
- # Search for nodes matching tags within bounding_box
- #
- # 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 })
-
- # using named placeholders http://www.robbyonrails.com/articles/2005/10/21/using-named-placeholders-in-ruby
- #keys = []
- #values = {}
-
- #conditions_hash.each do |key,value|
- # keys << "#{key} = :#{key}"
- # values[key.to_sym] = value
- #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)
+ # Sanity check the latitude and longitude and add an error if it's broken
+ def validate_position
+ errors.add(:base, "Node is not in the world") unless in_world?
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
-
- node = Node.new
doc.find('//osm/node').each do |pt|
- node.lat = pt['lat'].to_f
- node.lon = pt['lon'].to_f
+ return Node.from_xml_node(pt, create)
+ end
+ 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
- return nil unless node.in_world?
+ def self.from_xml_node(pt, create=false)
+ node = Node.new
+
+ raise OSM::APIBadXMLError.new("node", pt, "lat missing") if pt['lat'].nil?
+ raise OSM::APIBadXMLError.new("node", pt, "lon missing") if pt['lon'].nil?
+ node.lat = OSM.parse_float(pt['lat'], OSM::APIBadXMLError, "node", pt, "lat not a number")
+ node.lon = OSM.parse_float(pt['lon'], OSM::APIBadXMLError, "node", pt, "lon not a number")
+ raise OSM::APIBadXMLError.new("node", pt, "Changeset id is missing") if pt['changeset'].nil?
+ node.changeset_id = pt['changeset'].to_i
+
+ 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
+ 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
- unless create
- if pt['id'] != '0'
- node.id = pt['id'].to_i
- end
- end
+ # 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
- node.visible = pt['visible'] and pt['visible'] == 'true'
+ # Start with no tags
+ node.tags = Hash.new
- if create
- node.timestamp = Time.now
- else
- if pt['timestamp']
- node.timestamp = Time.parse(pt['timestamp'])
- end
- end
+ # 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
- tags = []
+ return node
+ end
- pt.find('tag').each do |tag|
- node.add_tag_key_val(tag['k'],tag['v'])
- 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
- end
- rescue
- node = nil
+ # 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
- return node
+ # 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 save_with_history!
- t = Time.now
+ def update_from(new_node, user)
Node.transaction do
- self.version += 1
- self.timestamp = t
- self.save!
+ 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
+ end
+
+ def create_with_history(user)
+ check_create_consistency(self, user)
+ self.version = 0
+ self.visible = true
- # 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
+ # update the changeset to include the new location
+ changeset.update_bbox!(bbox)
- # Create an OldNode
- old_node = OldNode.from_node(self)
- old_node.timestamp = t
- old_node.save_with_dependencies!
- end
+ save_with_history!
end
def to_xml
return doc
end
- def to_xml_node(user_display_name_cache = nil)
- el1 = XML::Node.new 'node'
- el1['id'] = self.id.to_s
- el1['lat'] = self.lat.to_s
- el1['lon'] = self.lon.to_s
+ def to_xml_node(changeset_cache = {}, user_display_name_cache = {})
+ el = XML::Node.new 'node'
+ el['id'] = self.id.to_s
- user_display_name_cache = {} if user_display_name_cache.nil?
+ add_metadata_to_xml_node(el, self, changeset_cache, user_display_name_cache)
- if user_display_name_cache and user_display_name_cache.key?(self.user_id)
- # use the cache if available
- elsif self.user.data_public?
- user_display_name_cache[self.user_id] = self.user.display_name
- else
- user_display_name_cache[self.user_id] = nil
+ if self.visible?
+ el['lat'] = self.lat.to_s
+ el['lon'] = self.lon.to_s
end
- el1['user'] = user_display_name_cache[self.user_id] unless user_display_name_cache[self.user_id].nil?
-
- self.tags.each do |k,v|
- el2 = XML::Node.new('tag')
- el2['k'] = k.to_s
- el2['v'] = v.to_s
- el1 << el2
- end
+ add_tags_to_xml_node(el, self.node_tags)
- el1['visible'] = self.visible.to_s
- el1['timestamp'] = self.timestamp.xmlschema
- el1['version'] = self.version.to_s
- return el1
+ return el
end
def tags_as_hash
- hash = {}
- Tags.split(self.tags) do |k,v|
- hash[k] = v
- end
- hash
+ return tags
end
def tags
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
projects / rails.git / blobdiff