Allow a GPX to be fetched in XML format by fetching data.xml instead
[rails.git] / app / models / trace.rb
index aa68d9b9408616784ccf8f60b70573f8f9cdc6cb..fef9983ddd69a74189c9d06bda8fde80f7af45b0 100644 (file)
@@ -1,12 +1,25 @@
 class Trace < ActiveRecord::Base
   set_table_name 'gpx_files'
 
-  validates_presence_of :user_id, :name, :public, :description, :timestamp
+  validates_presence_of :user_id, :name, :timestamp
+  validates_presence_of :description, :on => :create
 #  validates_numericality_of :latitude, :longitude
-  validates_inclusion_of :inserted, :in => [ true, false]
+  validates_inclusion_of :public, :inserted, :in => [ true, false]
   
   belongs_to :user
-  has_many :tags, :class_name => 'Tracetag', :foreign_key => 'gpx_id', :dependent => :destroy
+  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)
+    FileUtils.rm_f(icon_picture_name)
+    FileUtils.rm_f(large_picture_name)
+  end
+
+  def tagstring
+    return tags.collect {|tt| tt.tag}.join(" ")
+  end
 
   def tagstring=(s)
     self.tags = s.split().collect {|tag|
@@ -47,11 +60,169 @@ class Trace < ActiveRecord::Base
   
   # FIXME change to permanent filestore area
   def large_picture_name
-    "/tmp/#{id}.gif"
+    "/home/osm/icons/#{id}.gif"
   end
 
   # FIXME change to permanent filestore area
   def icon_picture_name
-    "/tmp/#{id}_icon.gif"
+    "/home/osm/icons/#{id}_icon.gif"
+  end
+
+  def trace_name
+    "/home/osm/gpx/#{id}.gpx"
+  end
+
+  def mime_type
+    filetype = `/usr/bin/file -bz #{trace_name}`.chomp
+    gzipped = filetype =~ /gzip compressed/
+    bzipped = filetype =~ /bzip2 compressed/
+    zipped = filetype =~ /Zip archive/
+
+    if gzipped then
+      mimetype = "application/x-gzip"
+    elsif bzipped then
+      mimetype = "application/x-bzip2"
+    elsif zipped
+      mimetype = "application/x-zip"
+    else
+      mimetype = "text/xml"
+    end
+
+    return mimetype
+  end
+
+  def extension_name
+    filetype = `/usr/bin/file -bz #{trace_name}`.chomp
+    gzipped = filetype =~ /gzip compressed/
+    bzipped = filetype =~ /bzip2 compressed/
+    zipped = filetype =~ /Zip archive/
+    tarred = filetype =~ /tar archive/
+
+    if tarred and gzipped then
+      extension = ".tar.gz"
+    elsif tarred and bzipped then
+      extension = ".tar.bz2"
+    elsif tarred
+      extension = ".tar"
+    elsif gzipped
+      extension = ".gpx.gz"
+    elsif bzipped
+      extension = ".gpx.bz2"
+    elsif zipped
+      extension = ".zip"
+    else
+      extension = ".gpx"
+    end
+
+    return extension
+  end
+
+  def to_xml
+    doc = OSM::API.new.get_xml_doc
+    doc.root << to_xml_node()
+    return doc
+  end
+
+  def to_xml_node
+    el1 = XML::Node.new 'gpx_file'
+    el1['id'] = self.id.to_s
+    el1['name'] = self.name.to_s
+    el1['lat'] = self.latitude.to_s
+    el1['lon'] = self.longitude.to_s
+    el1['user'] = self.user.display_name
+    el1['public'] = self.public.to_s
+    el1['pending'] = (!self.inserted).to_s
+    el1['timestamp'] = self.timestamp.xmlschema
+    return el1
+  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
+    gzipped = filetype =~ /gzip compressed/
+    bzipped = filetype =~ /bzip2 compressed/
+    zipped = filetype =~ /Zip archive/
+    tarred = filetype =~ /tar archive/
+
+    if gzipped or bzipped or zipped or tarred then
+      file = Tempfile.new("trace.#{id}");
+
+      if tarred and gzipped then
+        system("tar -zxOf #{trace_name} > #{file.path}")
+      elsif tarred and bzipped then
+        system("tar -jxOf #{trace_name} > #{file.path}")
+      elsif tarred
+        system("tar -xOf #{trace_name} > #{file.path}")
+      elsif gzipped
+        system("gunzip -c #{trace_name} > #{file.path}")
+      elsif bzipped
+        system("bunzip2 -c #{trace_name} > #{file.path}")
+      elsif zipped
+        system("unzip -p #{trace_name} > #{file.path}")
+      end
+
+      file.unlink
+    else
+      file = File.open(trace_name)
+    end
+
+    return file
+  end
+
+  def import
+    logger.info("GPX Import importing #{name} (#{id}) from #{user.email}")
+
+    gpx = OSM::GPXImporter.new(self.xml_file)
+
+    f_lat = 0
+    f_lon = 0
+    first = true
+
+    # 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.exists?(['gpx_id = ?', self.id])
+      Tracepoint.delete_all(['gpx_id = ?', self.id])
+    end
+
+    gpx.points do |point|
+      if first
+        f_lat = point['latitude']
+        f_lon = point['longitude']
+      end
+
+      tp = Tracepoint.new
+      tp.lat = point['latitude'].to_f
+      tp.lon = point['longitude'].to_f
+      tp.altitude = point['altitude'].to_f
+      tp.timestamp = point['timestamp']
+      tp.gpx_id = id
+      tp.trackid = point['segment'].to_i
+      tp.save!
+    end
+
+    if gpx.actual_points > 0
+      max_lat = Tracepoint.maximum('latitude', :conditions => ['gpx_id = ?', id])
+      min_lat = Tracepoint.minimum('latitude', :conditions => ['gpx_id = ?', id])
+      max_lon = Tracepoint.maximum('longitude', :conditions => ['gpx_id = ?', id])
+      min_lon = Tracepoint.minimum('longitude', :conditions => ['gpx_id = ?', id])
+
+      max_lat = max_lat.to_f / 10000000
+      min_lat = min_lat.to_f / 10000000
+      max_lon = max_lon.to_f / 10000000
+      min_lon = min_lon.to_f / 10000000
+
+      self.latitude = f_lat
+      self.longitude = f_lon
+      self.large_picture = gpx.get_picture(min_lat, min_lon, max_lat, max_lon, gpx.actual_points)
+      self.icon_picture = gpx.get_icon(min_lat, min_lon, max_lat, max_lon)
+      self.size = gpx.actual_points
+      self.inserted = true
+      self.save!
+    end
+
+    logger.info "done trace #{id}"
+
+    return gpx
   end
 end