284 lines
6.9 KiB
Ruby
284 lines
6.9 KiB
Ruby
class Way < ActiveRecord::Base
|
|
require 'xml/libxml'
|
|
|
|
set_table_name 'current_ways'
|
|
|
|
belongs_to :user
|
|
|
|
has_many :old_ways, :foreign_key => 'id', :order => 'version'
|
|
|
|
has_many :way_nodes, :foreign_key => 'id', :order => 'sequence_id'
|
|
has_many :nodes, :through => :way_nodes, :order => 'sequence_id'
|
|
|
|
has_many :way_tags, :foreign_key => 'id'
|
|
|
|
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
|
|
|
|
def self.from_xml(xml, create=false)
|
|
begin
|
|
p = XML::Parser.new
|
|
p.string = xml
|
|
doc = p.parse
|
|
|
|
doc.find('//osm/way').each do |pt|
|
|
return Way.from_xml_node(pt, create)
|
|
end
|
|
rescue
|
|
return nil
|
|
end
|
|
end
|
|
|
|
def self.from_xml_node(pt, create=false)
|
|
way = Way.new
|
|
|
|
if !create and pt['id'] != '0'
|
|
way.id = pt['id'].to_i
|
|
end
|
|
|
|
way.version = pt['version']
|
|
|
|
if create
|
|
way.timestamp = Time.now
|
|
way.visible = true
|
|
else
|
|
if pt['timestamp']
|
|
way.timestamp = Time.parse(pt['timestamp'])
|
|
end
|
|
end
|
|
|
|
pt.find('tag').each do |tag|
|
|
way.add_tag_keyval(tag['k'], tag['v'])
|
|
end
|
|
|
|
pt.find('nd').each do |nd|
|
|
way.add_nd_num(nd['ref'])
|
|
end
|
|
|
|
return way
|
|
end
|
|
|
|
# Find a way given it's ID, and in a single SQL call also grab its nodes
|
|
#
|
|
|
|
# You can't pull in all the tags too unless we put a sequence_id on the way_tags table and have a multipart key
|
|
def self.find_eager(id)
|
|
way = Way.find(id, :include => {:way_nodes => :node})
|
|
#If waytag had a multipart key that was real, you could do this:
|
|
#way = Way.find(id, :include => [:way_tags, {:way_nodes => :node}])
|
|
end
|
|
|
|
# Find a way given it's ID, and in a single SQL call also grab its nodes and tags
|
|
def to_xml
|
|
doc = OSM::API.new.get_xml_doc
|
|
doc.root << to_xml_node()
|
|
return doc
|
|
end
|
|
|
|
def to_xml_node(visible_nodes = nil, user_display_name_cache = nil)
|
|
el1 = XML::Node.new 'way'
|
|
el1['id'] = self.id.to_s
|
|
el1['visible'] = self.visible.to_s
|
|
el1['timestamp'] = self.timestamp.xmlschema
|
|
el1['version'] = self.version.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)
|
|
# 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
|
|
end
|
|
|
|
el1['user'] = user_display_name_cache[self.user_id] unless user_display_name_cache[self.user_id].nil?
|
|
|
|
# make sure nodes are output in sequence_id order
|
|
ordered_nodes = []
|
|
self.way_nodes.each do |nd|
|
|
if visible_nodes
|
|
# if there is a list of visible nodes then use that to weed out deleted nodes
|
|
if visible_nodes[nd.node_id]
|
|
ordered_nodes[nd.sequence_id] = nd.node_id.to_s
|
|
end
|
|
else
|
|
# otherwise, manually go to the db to check things
|
|
if nd.node.visible? and nd.node.visible?
|
|
ordered_nodes[nd.sequence_id] = nd.node_id.to_s
|
|
end
|
|
end
|
|
end
|
|
|
|
ordered_nodes.each do |nd_id|
|
|
if nd_id and nd_id != '0'
|
|
e = XML::Node.new 'nd'
|
|
e['ref'] = nd_id
|
|
el1 << e
|
|
end
|
|
end
|
|
|
|
self.way_tags.each do |tag|
|
|
e = XML::Node.new 'tag'
|
|
e['k'] = tag.k
|
|
e['v'] = tag.v
|
|
el1 << e
|
|
end
|
|
return el1
|
|
end
|
|
|
|
def nds
|
|
unless @nds
|
|
@nds = Array.new
|
|
self.way_nodes.each do |nd|
|
|
@nds += [nd.node_id]
|
|
end
|
|
end
|
|
@nds
|
|
end
|
|
|
|
def tags
|
|
unless @tags
|
|
@tags = {}
|
|
self.way_tags.each do |tag|
|
|
@tags[tag.k] = tag.v
|
|
end
|
|
end
|
|
@tags
|
|
end
|
|
|
|
def nds=(s)
|
|
@nds = s
|
|
end
|
|
|
|
def tags=(t)
|
|
@tags = t
|
|
end
|
|
|
|
def add_nd_num(n)
|
|
@nds = Array.new unless @nds
|
|
@nds << n.to_i
|
|
end
|
|
|
|
def add_tag_keyval(k, v)
|
|
@tags = Hash.new unless @tags
|
|
@tags[k] = v
|
|
end
|
|
|
|
def save_with_history!
|
|
t = Time.now
|
|
|
|
Way.transaction do
|
|
self.version += 1
|
|
self.timestamp = t
|
|
self.save!
|
|
|
|
tags = self.tags
|
|
WayTag.delete_all(['id = ?', self.id])
|
|
tags.each do |k,v|
|
|
tag = WayTag.new
|
|
tag.k = k
|
|
tag.v = v
|
|
tag.id = self.id
|
|
tag.save!
|
|
end
|
|
|
|
nds = self.nds
|
|
WayNode.delete_all(['id = ?', self.id])
|
|
sequence = 1
|
|
nds.each do |n|
|
|
nd = WayNode.new
|
|
nd.id = [self.id, sequence]
|
|
nd.node_id = n
|
|
nd.save!
|
|
sequence += 1
|
|
end
|
|
|
|
old_way = OldWay.from_way(self)
|
|
old_way.timestamp = t
|
|
old_way.save_with_dependencies!
|
|
end
|
|
end
|
|
|
|
def update_from(new_way, user)
|
|
if !new_way.preconditions_ok?
|
|
raise OSM::APIPreconditionFailedError.new
|
|
elsif new_way.version != version
|
|
raise OSM::APIVersionMismatchError.new(new_way.version, version)
|
|
else
|
|
self.user_id = user.id
|
|
self.tags = new_way.tags
|
|
self.nds = new_way.nds
|
|
self.visible = true
|
|
save_with_history!
|
|
end
|
|
end
|
|
|
|
def preconditions_ok?
|
|
return false if self.nds.empty?
|
|
self.nds.each do |n|
|
|
node = Node.find(:first, :conditions => ["id = ?", n])
|
|
unless node and node.visible
|
|
return false
|
|
end
|
|
end
|
|
return true
|
|
end
|
|
|
|
def delete_with_history(user)
|
|
if self.visible
|
|
# FIXME
|
|
# this should actually delete the relations,
|
|
# not just throw a PreconditionFailed if it's a member of a relation!!
|
|
|
|
# FIXME: this should probably renamed to delete_with_history
|
|
if RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id",
|
|
:conditions => [ "visible = 1 AND member_type='way' and member_id=?", self.id])
|
|
raise OSM::APIPreconditionFailedError
|
|
# end FIXME
|
|
else
|
|
self.user_id = user.id
|
|
self.tags = []
|
|
self.nds = []
|
|
self.visible = false
|
|
self.save_with_history!
|
|
end
|
|
else
|
|
raise OSM::APIAlreadyDeletedError
|
|
end
|
|
end
|
|
|
|
# delete a way and it's nodes that aren't part of other ways, with history
|
|
|
|
# FIXME: merge the potlatch code to delete the relations
|
|
def delete_with_relations_and_nodes_and_history(user)
|
|
# delete the nodes not used by other ways
|
|
self.unshared_node_ids.each do |node_id|
|
|
n = Node.find(node_id)
|
|
n.user_id = user.id
|
|
n.visible = false
|
|
n.save_with_history!
|
|
end
|
|
|
|
self.user_id = user.id
|
|
|
|
self.delete_with_history(user)
|
|
end
|
|
|
|
# Find nodes that belong to this way only
|
|
def unshared_node_ids
|
|
node_ids = self.nodes.collect { |node| node.id }
|
|
|
|
unless node_ids.empty?
|
|
way_nodes = WayNode.find(:all, :conditions => "node_id in (#{node_ids.join(',')}) and id != #{self.id}")
|
|
node_ids = node_ids - way_nodes.collect { |way_node| way_node.node_id }
|
|
end
|
|
|
|
return node_ids
|
|
end
|
|
|
|
# Temporary method to match interface to nodes
|
|
def tags_as_hash
|
|
return self.tags
|
|
end
|
|
end
|