142 lines
2.5 KiB
Ruby
142 lines
2.5 KiB
Ruby
class Way < ActiveRecord::Base
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require 'xml/libxml'
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belongs_to :user
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has_many :way_segments, :foreign_key => 'id'
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has_many :way_tags, :foreign_key => 'id'
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has_many :old_ways, :foreign_key => :id
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set_table_name 'current_ways'
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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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way = Way.new
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doc.find('//osm/way').each do |pt|
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if !create and pt['id'] != '0'
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way.id = pt['id'].to_i
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end
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if create
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way.timestamp = Time.now
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way.visible = true
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else
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if pt['timestamp']
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way.timestamp = Time.parse(pt['timestamp'])
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end
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end
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pt.find('tag').each do |tag|
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way.add_tag_keyval(tag['k'], tag['v'])
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end
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pt.find('seg').each do |seg|
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way.add_seg_num(seg['id'])
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end
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end
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return way
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end
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def to_xml
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doc = XML::Document.new
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doc.encoding = 'UTF-8'
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root = XML::Node.new 'osm'
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root['version'] = '0.4'
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root['generator'] = 'OpenStreetMap server'
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doc.root = root
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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 'way'
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el1['id'] = self.id.to_s
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el1['visible'] = self.visible.to_s
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el1['timestamp'] = self.timestamp.xmlschema
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self.way_segments.each do |seg| # FIXME need to make sure they come back in the right order
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e = XML::Node.new 'seg'
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e['id'] = seg.segment_id.to_s
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el1 << e
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end
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self.way_tags.each do |tag|
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e = XML::Node.new 'tag'
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e['k'] = tag.k
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e['v'] = tag.v
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el1 << e
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end
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return el1
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end
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def segs
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@segs = Array.new unless @segs
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@segs
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end
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def tags
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@tags = Hash.new unless @tags
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@tags
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end
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def segs=(s)
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@segs = s
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end
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def tags=(t)
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@tags = t
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end
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def add_seg_num(n)
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@segs = Array.new unless @segs
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@segs << n.to_i
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end
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def add_tag_keyval(k, v)
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@tags = Hash.new unless @tags
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@tags[k] = v
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end
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def save_with_history
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t = Time.now
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self.timestamp = t
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self.save
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WayTag.delete_all(['id = ?', self.id])
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self.tags.each do |k,v|
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tag = WayTag.new
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tag.k = k
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tag.v = v
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tag.id = self.id
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tag.save
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end
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WaySegment.delete_all(['id = ?', self.id])
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i = 0
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self.segs.each do |n|
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seg = WaySegment.new
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seg.id = self.id
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seg.segment_id = n
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seg.sequence_id = i
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seg.save
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i += 1
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end
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old_way = OldWay.from_way(self)
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old_way.timestamp = t
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old_way.save_with_dependencies
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end
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end
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