108 lines
2.5 KiB
Ruby
108 lines
2.5 KiB
Ruby
class Segment < ActiveRecord::Base
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require 'xml/libxml'
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set_table_name 'current_segments'
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validates_numericality_of :node_a
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validates_numericality_of :node_b
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has_many :old_segments, :foreign_key => :id
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belongs_to :user
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# using belongs_to :foreign_key = 'node_*', since if use has_one :foreign_key = 'id', segment preconditions? fails checking for segment id in node table
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belongs_to :from_node, :class_name => 'Node', :foreign_key => 'node_a'
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belongs_to :to_node, :class_name => 'Node', :foreign_key => 'node_b'
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def self.from_xml(xml, create=false)
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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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segment = Segment.new
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doc.find('//osm/segment').each do |pt|
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segment.node_a = pt['from'].to_i
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segment.node_b = pt['to'].to_i
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if pt['id'] != '0'
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segment.id = pt['id'].to_i
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end
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segment.visible = true
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if create
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segment.timestamp = Time.now
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else
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if pt['timestamp']
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segment.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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segment.tags = tags
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end
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return segment
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end
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def save_with_history
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begin
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Segment.transaction do
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self.timestamp = Time.now
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self.save
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old_segment = OldSegment.from_segment(self)
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old_segment.save
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end
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return true
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rescue Exception => ex
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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
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el1 = XML::Node.new 'segment'
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el1['id'] = self.id.to_s
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el1['from'] = self.node_a.to_s
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el1['to'] = self.node_b.to_s
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el1['user'] = self.user.display_name if self.user.data_public?
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Segment.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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def preconditions_ok?
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from_node and from_node.visible and to_node and to_node.visible
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end
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end
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