Actually showing the closest neighbours instead of a fixed number of people within...

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

diff --git a/app/models/node.rb b/app/models/node.rb
index b83d934a28364239a700999292a4acdb94231c05..9ed5c3bbf4cd0983f0d48ea623af788480d2df6d 100644 (file)
--- a/app/models/node.rb
+++ b/app/models/node.rb
@@ -1,94 +1,114 @@
-class Node < ActiveRecord::Base
+class Node < GeoRecord

   require 'xml/libxml'
   require 'xml/libxml'

+

   set_table_name 'current_nodes'
   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
 
   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)
 
   def self.from_xml(xml, create=false)

-    p = XML::Parser.new
-    p.string = xml
-    doc = p.parse
+    begin
+      p = XML::Parser.new
+      p.string = xml
+      doc = p.parse
+  
+      node = Node.new

 
 

-    node = Node.new
+      doc.find('//osm/node').each do |pt|
+        node.lat = pt['lat'].to_f
+        node.lon = pt['lon'].to_f

 
 

-    doc.find('//osm/node').each do |pt|
+        return nil unless node.in_world?

 
 

+        unless create
+          if pt['id'] != '0'
+            node.id = pt['id'].to_i
+          end
+        end

 
 

-      node.latitude = pt['lat'].to_f
-      node.longitude = pt['lon'].to_f
+        node.visible = pt['visible'] and pt['visible'] == 'true'

 
 

-      if node.latitude > 90 or node.latitude < -90 or node.longitude > 180 or node.longitude < -180
-        return nil
-      end
+        if create
+          node.timestamp = Time.now
+        else
+          if pt['timestamp']
+            node.timestamp = Time.parse(pt['timestamp'])
+          end
+        end

 
 

-      if pt['id'] != '0'
-        node.id = pt['id'].to_i
-      end
-
-      node.visible = pt['visible'] == '1'
+        tags = []

 
 

-      if create
-        node.timestamp = Time.now
-      else
-        node.timestamp = Time.parse(pt['timestamp'])
-      end
+        pt.find('tag').each do |tag|
+          tags << [tag['k'],tag['v']]
+        end

 
 

-      tags = []
+        tags = tags.collect { |k,v| "#{k}=#{v}" }.join(';')
+        tags = '' if tags.nil?

 
 

-      pt.find('tag').each do |tag|
-        tags << [tag['k'],tag['v']]
+        node.tags = tags

       end
       end

-
-      tags = tags.collect { |k,v| "#{k}=#{v}" }.join(';')
-      tags = '' if tags.nil?
-
-      node.tags = tags
-
+    rescue
+      node = nil

     end
     end

+

     return node
   end
 
     return node
   end
 

-  def save_with_history
-    begin
-      Node.transaction do
-        old_node = OldNode.from_node(this)
-        this.save
-        old_node.save
-      end
-      return true
-    rescue Exception => ex
-      return nil
-
+  def save_with_history!
+    Node.transaction do
+      self.timestamp = Time.now
+      self.save!
+      old_node = OldNode.from_node(self)
+      old_node.save!

     end
   end
 
     end
   end
 

-  def self.to_xml
-    doc = XML::Document.new
+  def to_xml
+    doc = OSM::API.new.get_xml_doc
+    doc.root << to_xml_node()
+    return doc
+  end

 
 

-    doc.encoding = "UTF-8"  
-    root = XML::Node.new 'osm'
-    root['version'] = '0.4'
-    root['generator'] = 'OpenStreetMap server'
-    doc.root = root
+  def to_xml_node(user_display_name_cache = nil)

     el1 = XML::Node.new 'node'
     el1 = XML::Node.new 'node'

-    el1['id'] = this.id.to_s
-    el1['lat'] = this.latitude.to_s
-    el1['lon'] = this.longitude.to_s
-    split_tags(el1, this.tags)
-    el1['visible'] = thiss.visible.to_s
-    el1['timestamp'] = this.timestamp.xmlschema
-    root << el1
+    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

 
 

-    return root
+    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
 
   end
 

-
-  private
-  def split_tags(el, tags)
+  def self.split_tags(el, tags)

     tags.split(';').each do |tag|
       parts = tag.split('=')
       key = ''
     tags.split(';').each do |tag|
       parts = tag.split('=')
       key = ''


@@ -96,14 +116,11 @@ class Node < ActiveRecord::Base
       key = parts[0].strip unless parts[0].nil?
       val = parts[1].strip unless parts[1].nil?
       if key != '' && val != ''
       key = parts[0].strip unless parts[0].nil?
       val = parts[1].strip unless parts[1].nil?
       if key != '' && val != ''

-        el2 = Node.new('tag')
+        el2 = XML::Node.new('tag')

         el2['k'] = key.to_s
         el2['v'] = val.to_s
         el << el2
       end
     end
   end
         el2['k'] = key.to_s
         el2['v'] = val.to_s
         el << el2
       end
     end
   end

-
-
-

 end
 end