131 lines
3 KiB
Ruby
131 lines
3 KiB
Ruby
class Node < ActiveRecord::Base
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require 'xml/libxml'
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set_table_name 'current_nodes'
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validates_presence_of :user_id, :timestamp
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validates_inclusion_of :visible, :in => [ true, false ]
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validates_numericality_of :latitude, :longitude
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validate :validate_position
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has_many :old_nodes, :foreign_key => :id
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belongs_to :user
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def validate_position
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errors.add_to_base("Node is not in the world") unless in_world?
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end
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def in_world?
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return false if self.latitude < -90 or self.latitude > 90
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return false if self.longitude < -180 or self.longitude > 180
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return true
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end
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def self.from_xml(xml, create=false)
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begin
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p = XML::Parser.new
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p.string = xml
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doc = p.parse
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node = Node.new
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doc.find('//osm/node').each do |pt|
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node.latitude = pt['lat'].to_f
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node.longitude = pt['lon'].to_f
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return nil unless node.in_world?
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unless create
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if pt['id'] != '0'
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node.id = pt['id'].to_i
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end
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end
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node.visible = pt['visible'] and pt['visible'] == 'true'
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if create
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node.timestamp = Time.now
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else
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if pt['timestamp']
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node.timestamp = Time.parse(pt['timestamp'])
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end
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end
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tags = []
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pt.find('tag').each do |tag|
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tags << [tag['k'],tag['v']]
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end
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tags = tags.collect { |k,v| "#{k}=#{v}" }.join(';')
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tags = '' if tags.nil?
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node.tags = tags
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end
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rescue
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node = nil
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end
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return node
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end
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def save_with_history
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begin
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Node.transaction do
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self.timestamp = Time.now
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self.save!
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old_node = OldNode.from_node(self)
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old_node.save!
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end
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return true
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rescue
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return nil
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end
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end
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def to_xml
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doc = OSM::API.new.get_xml_doc
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doc.root << to_xml_node()
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return doc
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end
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def to_xml_node(user_display_name_cache = nil)
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el1 = XML::Node.new 'node'
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el1['id'] = self.id.to_s
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el1['lat'] = self.latitude.to_s
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el1['lon'] = self.longitude.to_s
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user_display_name_cache = {} if user_display_name_cache.nil?
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if user_display_name_cache and user_display_name_cache.key?(self.user_id)
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# use the cache if available
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elsif self.user.data_public?
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user_display_name_cache[self.user_id] = self.user.display_name
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else
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user_display_name_cache[self.user_id] = nil
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end
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el1['user'] = user_display_name_cache[self.user_id] unless user_display_name_cache[self.user_id].nil?
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Node.split_tags(el1, self.tags)
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el1['visible'] = self.visible.to_s
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el1['timestamp'] = self.timestamp.xmlschema
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return el1
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end
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def self.split_tags(el, tags)
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tags.split(';').each do |tag|
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parts = tag.split('=')
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key = ''
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val = ''
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key = parts[0].strip unless parts[0].nil?
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val = parts[1].strip unless parts[1].nil?
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if key != '' && val != ''
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el2 = XML::Node.new('tag')
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el2['k'] = key.to_s
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el2['v'] = val.to_s
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el << el2
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end
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end
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end
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end
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