+ # Read in xml as text and return it's Node object representation
+ def self.from_xml(xml, create = false)
+ p = XML::Parser.string(xml, :options => XML::Parser::Options::NOERROR)
+ 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
+
+ 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.zero?
+ 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