from zope.interface import implements
from zope.component import adapts
from zope.publisher.interfaces import IPublishTraverse
from zope.publisher.http import IHTTPRequest
from ZPublisher.BaseRequest import DefaultPublishTraverse
from zope.publisher.interfaces import NotFound

from interfaces import ImFolio

class KMLTraverser(object):
    """ KML export of onto data """
    adapts(ImFolio, IHTTPRequest)
    implements(IPublishTraverse)

    def __init__(self, context, request):
        self.context = context
        self.default = DefaultPublishTraverse(context,request)


    def publishTraverse(self, request, name):
        try:
            obj = self.default.publishTraverse(request, name)
        except (NotFound, KeyError, AttributeError), e:
            if name == 'kml':
                obj = self.context.kml_generator(request, name)
            else:
                raise NotFound(None, name, request)
        return obj