Add support for creating new notes

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

diff --git a/app/models/trace.rb b/app/models/trace.rb
index 39ecb416ac8374d31e211f03b05ebe7bacb1b47e..bc47aa8e07acee587db1980276cfbdb43862724d 100644 (file)
--- a/app/models/trace.rb
+++ b/app/models/trace.rb
@@ -1,5 +1,13 @@
 class Trace < ActiveRecord::Base
-  set_table_name 'gpx_files'
+  self.table_name = "gpx_files"
+
+  belongs_to :user, :counter_cache => true
+  has_many :tags, :class_name => 'Tracetag', :foreign_key => 'gpx_id', :dependent => :delete_all
+  has_many :points, :class_name => 'Tracepoint', :foreign_key => 'gpx_id', :dependent => :delete_all
+
+  scope :visible, where(:visible => true)
+  scope :visible_to, lambda { |u| visible.where("visibility IN ('public', 'identifiable') OR user_id = ?", u) }
+  scope :public, where(:visibility => ["public", "identifiable"])
 
   validates_presence_of :user_id, :name, :timestamp
   validates_presence_of :description, :on => :create
@@ -9,10 +17,6 @@ class Trace < ActiveRecord::Base
   validates_inclusion_of :inserted, :in => [ true, false ]
   validates_inclusion_of :visibility, :in => ["private", "public", "trackable", "identifiable"]
 
-  belongs_to :user
-  has_many :tags, :class_name => 'Tracetag', :foreign_key => 'gpx_id', :dependent => :delete_all
-  has_many :points, :class_name => 'Tracepoint', :foreign_key => 'gpx_id', :dependent => :delete_all
-
   def destroy
     super
     FileUtils.rm_f(trace_name)
@@ -169,6 +173,52 @@ class Trace < ActiveRecord::Base
     return el1
   end
 
+  # Read in xml as text and return it's Node object representation
+  def self.from_xml(xml, create=false)
+    begin
+      p = XML::Parser.string(xml)
+      doc = p.parse
+
+      doc.find('//osm/gpx_file').each do |pt|
+        return Trace.from_xml_node(pt, create)
+      end
+
+      raise OSM::APIBadXMLError.new("trace", xml, "XML doesn't contain an osm/gpx_file element.")
+    rescue LibXML::XML::Error, ArgumentError => ex
+      raise OSM::APIBadXMLError.new("trace", xml, ex.message)
+    end
+  end
+
+  def self.from_xml_node(pt, create=false)
+    trace = Trace.new
+    
+    raise OSM::APIBadXMLError.new("trace", pt, "visibility missing") if pt['visibility'].nil?
+    trace.visibility = pt['visibility']
+
+    unless create
+      raise OSM::APIBadXMLError.new("trace", pt, "ID is required when updating.") if pt['id'].nil?
+      trace.id = pt['id'].to_i
+      # .to_i will return 0 if there is no number that can be parsed. 
+      # We want to make sure that there is no id with zero anyway
+      raise OSM::APIBadUserInput.new("ID of trace cannot be zero when updating.") if trace.id == 0
+    end
+
+    # We don't care about the time, as it is explicitly set on create/update/delete
+    # We don't care about the visibility as it is implicit based on the action
+    # and set manually before the actual delete
+    trace.visible = true
+
+    description = pt.find('description').first
+    raise OSM::APIBadXMLError.new("trace", pt, "description missing") if description.nil?
+    trace.description = description.content
+
+    pt.find('tag').each do |tag|
+      trace.tags.build(:tag => tag.content)
+    end
+
+    return trace
+  end
+
   def xml_file
     # TODO *nix specific, could do to work on windows... would be functionally inferior though - check for '.gz'
     filetype = `/usr/bin/file -bz #{trace_name}`.chomp
@@ -216,8 +266,8 @@ class Trace < ActiveRecord::Base
     # If there are any existing points for this trace then delete
     # them - we check for existing points first to avoid locking
     # the table in the common case where there aren't any.
-    if Tracepoint.find(:first, :conditions => ['gpx_id = ?', self.id])
-      Tracepoint.delete_all(['gpx_id = ?', self.id])
+    if Tracepoint.where(:gpx_id => self.id).exists?
+      Tracepoint.delete_all(:gpx_id => self.id)
     end
 
     gpx.points do |point|