rails_port_0.5: Merge rails_port.

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

diff --git a/app/models/node.rb b/app/models/node.rb
index 914e90b7eb43db78c5c2c4bfb29e25602d4d269d..f9210bf0664a88a296a8c41e200d88fb9e8652a2 100644 (file)
--- a/app/models/node.rb
+++ b/app/models/node.rb
@@ -1,4 +1,153 @@
 class Node < ActiveRecord::Base
+  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
+ 
+  before_save :update_tile
+
+  def self.find_by_area(minlat, minlon, maxlat, maxlon, options)
+    self.with_scope(:find => {:conditions => OSM.sql_for_area(minlat, minlon, maxlat, maxlon)}) do
+      return self.find(:all, options)
+    end
+  end
+
+  def update_tile
+    self.tile = QuadTile.tile_for_point(lat, lon)
+  end
+
+  def lat=(l)
+    self.latitude = (l * 10000000).round
+  end
+
+  def lon=(l)
+    self.longitude = (l * 10000000).round
+  end
+
+  def lat
+    return self.latitude.to_f / 10000000
+  end
+
+  def lon
+    return self.longitude.to_f / 10000000
+  end
+
+  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
+
+        tags = tags.collect { |k,v| "#{k}=#{v}" }.join(';')
+        tags = '' if tags.nil?
+
+        node.tags = 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?
+
+    Node.split_tags(el1, self.tags)
+    el1['visible'] = self.visible.to_s
+    el1['timestamp'] = self.timestamp.xmlschema
+    return el1
+  end
+
+  def self.split_tags(el, tags)
+    tags.split(';').each do |tag|
+      parts = tag.split('=')
+      key = ''
+      val = ''
+      key = parts[0].strip unless parts[0].nil?
+      val = parts[1].strip unless parts[1].nil?
+      if key != '' && val != ''
+        el2 = XML::Node.new('tag')
+        el2['k'] = key.to_s
+        el2['v'] = val.to_s
+        el << el2
+      end
+    end
+  end
 end