+
+ # 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
+ 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
+ tmpfile = Tempfile.new("trace.#{id}");
+
+ if tarred and gzipped then
+ system("tar -zxOf #{trace_name} > #{tmpfile.path}")
+ elsif tarred and bzipped then
+ system("tar -jxOf #{trace_name} > #{tmpfile.path}")
+ elsif tarred
+ system("tar -xOf #{trace_name} > #{tmpfile.path}")
+ elsif gzipped
+ system("gunzip -c #{trace_name} > #{tmpfile.path}")
+ elsif bzipped
+ system("bunzip2 -c #{trace_name} > #{tmpfile.path}")
+ elsif zipped
+ system("unzip -p #{trace_name} -x '__MACOSX/*' > #{tmpfile.path}")
+ end
+
+ tmpfile.unlink
+
+ file = tmpfile.file
+ else
+ file = File.open(trace_name)
+ end
+
+ return file
+ end
+
+ def import
+ logger.info("GPX Import importing #{name} (#{id}) from #{user.email}")
+
+ gpx = GPX::File.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.where(:gpx_id => self.id).exists?
+ Tracepoint.delete_all(:gpx_id => self.id)
+ end
+
+ gpx.points do |point|
+ if first
+ f_lat = point.latitude
+ f_lon = point.longitude
+ first = false
+ end
+
+ tp = Tracepoint.new
+ tp.lat = point.latitude
+ tp.lon = point.longitude
+ tp.altitude = point.altitude
+ tp.timestamp = point.timestamp
+ tp.gpx_id = id
+ tp.trackid = point.segment
+ 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.picture(min_lat, min_lon, max_lat, max_lon, gpx.actual_points)
+ self.icon_picture = gpx.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
projects / rails.git / blobdiff