from django.contrib.gis import feeds

from .models import City

class TestGeoRSS1(feeds.Feed):

    link = "/city/"

    title = "Test GeoDjango Cities"

    def items(self):

        return City.objects.all()

    def item_link(self, item):

        return "/city/%s/" % item.pk

    def item_geometry(self, item):

        return item.point

class TestGeoRSS2(TestGeoRSS1):

    def geometry(self, obj):

        # This should attach a <georss:box> element for the extent of

        # of the cities in the database.  This tuple came from

        # calling `City.objects.aggregate(Extent())` -- we can't do that call

        # here because `Extent` is not implemented for MySQL/Oracle.

        return (-123.30, -41.32, 174.78, 48.46)

    def item_geometry(self, item):

        # Returning a simple tuple for the geometry.

        return item.point.x, item.point.y

class TestGeoAtom1(TestGeoRSS1):

    feed_type = feeds.GeoAtom1Feed

class TestGeoAtom2(TestGeoRSS2):

    feed_type = feeds.GeoAtom1Feed

    def geometry(self, obj):

        # This time we'll use a 2-tuple of coordinates for the box.

        return ((-123.30, -41.32), (174.78, 48.46))

class TestW3CGeo1(TestGeoRSS1):

    feed_type = feeds.W3CGeoFeed

# The following feeds are invalid, and will raise exceptions.

class TestW3CGeo2(TestGeoRSS2):

    feed_type = feeds.W3CGeoFeed

class TestW3CGeo3(TestGeoRSS1):

    feed_type = feeds.W3CGeoFeed

    def item_geometry(self, item):

        from django.contrib.gis.geos import Polygon

        return Polygon(((0, 0), (0, 1), (1, 1), (1, 0), (0, 0)))

# The feed dictionary to use for URLs.

feed_dict = {

    "rss1": TestGeoRSS1,

    "rss2": TestGeoRSS2,

    "atom1": TestGeoAtom1,

    "atom2": TestGeoAtom2,

    "w3cgeo1": TestW3CGeo1,

    "w3cgeo2": TestW3CGeo2,

    "w3cgeo3": TestW3CGeo3,

}