from pyramid import view_config

import objective


def includeme(config):
    # include config somewhere
    config.include("pyramid_objective")
    config.add_route("foobar", "/foobar")


class FooObjective(objective.BunchMapping)
    @objective.Item()
    class body(objective.Mapping):
        foo = objective.Item(objective.Unicode)
        bar = objective.Item(objective.Number)


@view_config(route_name="foobar", request_method="POST")
def view(request):

    validated = request.objective(FooObjective)

    assert isinstance(validated.body['foo'], unicode)
    assert isinstance(validated.body['bar'], (int, float))

class DefaultObjectiveSubject(dict):

    """Default adapter to build our objective subject."""

    implements(IObjectiveSubject)
    adapts(IRequest)

    def __init__(self, request):
        super(DefaultObjectiveSubject, self).__init__(
            match=request.matchdict,
            params=request.params
        )

        body = self._find_body(request)

        if body:
            self['body'] = body

    @staticmethod
    def _find_body(request):
        # TODO maybe inspect content-type?
        try:
            body = request.json_body
            return body

        except ValueError:
            if request.POST:
                return request.POST