way stuff

app/models/current_way_segment.rb

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+class CurrentWaySegment < ActiveRecord::Base
+end

app/models/old_way.rb

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+class OldWay < ActiveRecord::Base
+  set_table_name 'ways'
+
+  belongs_to :user
+
+  def self.from_way(way)
+    old_way = OldWay.new
+    old_way.user_id = way.user_id
+    old_way.timestamp = way.timestamp
+    old_way.id = way.id
+    return old_way
+  end
+
+end

app/models/way.rb

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+class Way < ActiveRecord::Base
+  require 'xml/libxml'
+  
+  belongs_to :user
+  set_table_name 'current_ways'
+
+  def self.from_xml(xml, create=false)
+    p = XML::Parser.new
+    p.string = xml
+    doc = p.parse
+
+    way = Way.new
+
+    doc.find('//osm/way').each do |pt|
+      if !create and pt['id'] != '0'
+        way.id = pt['id'].to_i
+      end
+
+      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('seg').each do |seg|
+        way.add_seg_num(seg['id'])
+      end
+ 
+
+    end
+
+    return way
+  end
+
+  def segs
+    @segs = Array.new unless @segs
+    @segs
+  end
+
+  def tags
+    @tags = Hash.new unless @tags
+    @tags
+  end
+
+  def add_seg_num(n)
+    @segs = Array.new unless @segs
+    @segs << 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
+    self.timestamp = t
+    self.save
+    
+    WayTag.delete_all(['id = ?', self.id])
+
+    self.tags.each do |k,v|
+      tag = WayTag.new
+      tag.k = k
+      tag.v = v
+      tag.id = self.id
+      tag.save
+    end
+
+    old_way = OldWay.from_way(self)
+    old_way.save
+  end
+
+end

app/models/way_tag.rb

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+class WayTag < ActiveRecord::Base
+  set_table_name 'current_way_tags'
+
+  belongs_to :way, :foreign_key => 'id'
+
+end