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[rails.git] / app / models / node.rb

diff --git a/app/models/node.rb b/app/models/node.rb
index d1bedd03cdf5f8284227ecab0675513847f34de5..59aa4d36ffd01ef845896ca1199594253a6ef0fe 100644 (file)
--- a/app/models/node.rb
+++ b/app/models/node.rb
@@ -1,6 +1,113 @@
-class Node < ActiveRecord::Base
+class Node < GeoRecord
+  require 'xml/libxml'
+
   set_table_name 'current_nodes'
+  
+  validates_presence_of :user_id, :timestamp
+  validates_inclusion_of :visible, :in => [ true, false ]
+  validates_numericality_of :latitude, :longitude
+  validate :validate_position
 
+  has_many :old_nodes, :foreign_key => :id
   belongs_to :user
+ 
+  def validate_position
+    errors.add_to_base("Node is not in the world") unless in_world?
+  end
+
+  def in_world?
+    return false if self.lat < -90 or self.lat > 90
+    return false if self.lon < -180 or self.lon > 180
+    return true
+  end
+
+  def self.from_xml(xml, create=false)
+    begin
+      p = XML::Parser.new
+      p.string = xml
+      doc = p.parse
+  
+      node = Node.new
+
+      doc.find('//osm/node').each do |pt|
+        node.lat = pt['lat'].to_f
+        node.lon = pt['lon'].to_f
+
+        return nil unless node.in_world?
+
+        unless create
+          if pt['id'] != '0'
+            node.id = pt['id'].to_i
+          end
+        end
+
+        node.visible = pt['visible'] and pt['visible'] == 'true'
+
+        if create
+          node.timestamp = Time.now
+        else
+          if pt['timestamp']
+            node.timestamp = Time.parse(pt['timestamp'])
+          end
+        end
+
+        tags = []
+
+        pt.find('tag').each do |tag|
+          tags << [tag['k'],tag['v']]
+        end
+
+        node.tags = Tags.join(tags)
+      end
+    rescue
+      node = nil
+    end
+
+    return node
+  end
+
+  def save_with_history!
+    Node.transaction do
+      self.timestamp = Time.now
+      self.save!
+      old_node = OldNode.from_node(self)
+      old_node.save!
+    end
+  end
+
+  def to_xml
+    doc = OSM::API.new.get_xml_doc
+    doc.root << to_xml_node()
+    return doc
+  end
+
+  def to_xml_node(user_display_name_cache = nil)
+    el1 = XML::Node.new 'node'
+    el1['id'] = self.id.to_s
+    el1['lat'] = self.lat.to_s
+    el1['lon'] = self.lon.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?
+
+    Tags.split(self.tags) do |k,v|
+      el2 = XML::Node.new('tag')
+      el2['k'] = k.to_s
+      el2['v'] = v.to_s
+      el1 << el2
+    end
 
+    el1['visible'] = self.visible.to_s
+    el1['timestamp'] = self.timestamp.xmlschema
+    return el1
+  end
 end