feeds.py

from django.contrib.syndication.feeds import FeedDoesNotExist
from django.core.exceptions import ObjectDoesNotExist
from django.contrib.syndication.feeds import Feed

from django.core.urlresolvers import reverse
from django.template import RequestContext
from django.shortcuts import render_to_response

from models import Event, Group
from views import view

class EventFeed(Feed):
    def get_object(self, bits):
        # [] , ['cbc'], ['cbc','lowmass']
        if len(bits) not in [0,1,2]:
            raise FeedDoesNotExist
        if not bits:
            title = "GraCEDB Events"
            objs = Event.objects.order_by("-id")
        else:
            group = Group.objects.filter(name__iexact=bits[0])
            if not group.count():
                raise FeedDoesNotExist
            group = group[0]
            objs = Event.objects.filter(group=group)
            if len(bits) == 1:
                title = "GraCEDB Events for %s Group" % group.name
            else:
                requestedtype = bits[1]
                type = [(c,t) for (c,t) in Event.ANALYSIS_TYPE_CHOICES \
                        if t.lower() == requestedtype]
                if not type:
                    raise FeedDoesNotExist
                typecode, type = type[0]
                title = "GraCEDB Events for %s / %s" % (group.name, type)
                objs = objs.filter(analysisType=typecode)
        return title, objs[:10]

    def title(self, obj):
        title, _ = obj
        return title

    def link(self, obj):
        # XXX  WHAT is THIS??
        # Breaks the feed if it's not there.  Appears in <link> tags.  Eh?
        return "/linky"

    def item_link(self, obj):
        return reverse(view, args=[obj.graceid()])

    def description(self, obj):
        # XXX Descriptive text for the feed itself.
        # I don't know what to put here
        return ""

    def items(self, obj):
        _, x = obj
        return x

def feedview(request):
    return render_to_response(
            'feeds/index.html',
            {},
            context_instance=RequestContext(request))