"""

Make feeds for my blog

Use PyRSS2gen

Not Django's - it's odd.

I like the function-

oriented interface

not the method one

TODO: max() on an empty sequence in the lastBuildDate section causes

exceptions

"""

from django.http import HttpResponse, HttpResponseRedirect, Http404

from django.views.decorators.cache import cache_page

import PyRSS2Gen

def _build_entry_item(entry):

    "Build the RSSItem for a blog Entry"

    entry_kwargs = {}

    entry_kwargs['title'] = entry.title

    entry_kwargs['guid'] = guid = entry.urls.feed_url

    entry_kwargs['link'] = "http://adam.gomaa.us%s" % guid

    entry_kwargs['description'] = entry.rendered

    entry_kwargs['pubDate'] = entry.pub_date

    return PyRSS2Gen.RSSItem(**entry_kwargs)

def _build_comment_item(comment):

    "Return the RSSItem for the blog Comment"

    item_kwargs = {}

    item_kwargs['title'] = "Comment on %s" % comment.entry.title

    abs_url = comment.entry.feed_url

    item_kwargs['link'] = "http://adam.gomaa.us%s" % abs_url

    item_kwargs['guid'] = comment.entry.slug+str(comment.id)

    item_kwargs['description'] = comment.rendered

    item_kwargs['pubDate'] = comment.pub_date

    return PyRSS2Gen.RSSItem(**item_kwargs)

@cache_page(60 * 60)

def latest(request):

    "Show the latest blog Entries"

    from agdj.blog.models import Entry

    limit = request.GET.get("limit", None)

    if limit is None:

        limit = 5

    items = Entry.public_objects.order_by("-pub_date")[:limit]

    feed_kwargs = {}

    feed_kwargs['title'] = "204 No Content Blog"

    feed_kwargs['link'] = "http://adam.gomaa.us/blog/"

    feed_kwargs['description'] = "Feed for 204 No Content, Adam Gomaa's blog."

    feed_kwargs['lastBuildDate'] = max([item.pub_date for item in items])

    feed_kwargs['items'] = [_build_entry_item(item) for item in items]

    rss = PyRSS2Gen.RSS2(**feed_kwargs)

    res = HttpResponse(rss.to_xml())

    res['content-type'] = "application/rss+xml"

    return res

def per_tag(request, tag):

    "Feed for the latest Entries for a tag"

    from agdj.blog.models import Entry

    from tagging.models import TaggedItem

    items = Entry.objects.filter(public=True).order_by("-pub_date")

    items = TaggedItem.objects.get_by_model(items, tag)[:5]

    items = list(items)

    if not items:

        raise Http404()

    feed_kwargs = {}

    feed_kwargs['title'] = "204 No Content Blog"

    feed_kwargs['link'] = "http://adam.gomaa.us/blog/"

    feed_kwargs['description'] = "Feed for '%s' tag in 204 No Content, Adam Gomaa's blog." % tag

    feed_kwargs['lastBuildDate'] = max([item.pub_date for item in items])

    feed_kwargs['items'] = [_build_entry_item(item) for item in items]

    rss = PyRSS2Gen.RSS2(**feed_kwargs)

    res = HttpResponse(rss.to_xml())

    res['content-type'] = "application/rss+xml"

    return res

def comments(request):

    "Feed of the latest comments"

    from agdj.blog.models import Comment

    items = Comment.objects.order_by("-pub_date")[:15]

    feed_kwargs = {}

    feed_kwargs['title'] = "204 Blog Comments"

    feed_kwargs['link'] = "http://adam.gomaa.us/blog/"

    feed_kwargs['description'] = "Comment feed for 204 No Content."

    feed_kwargs['lastBuildDate'] = max([item.pub_date for item in items])

    feed_kwargs['items'] = [_build_comment_item(item) for item in items]

    rss = PyRSS2Gen.RSS2(**feed_kwargs)

    res = HttpResponse(rss.to_xml())

    res['content-type'] = "application/rss+xml"

    return res