feeds: add per arch, per repo feed ability

Make the feed framework a lot more flexible and give the possibility to have
a feed for each architecture. You can drill down even more than also get a
feed for a particular repo; some might find this helpful for something like
tracking [testing]. Implements FS#12939.

I also bumped up the number of items available in each of these feeds; since
it is full of a bunch of small items it might be more helpful to have more
available and it should also prevent fewer ones from being missed.

The UI isn't exactly spectacular, but I figured some sort of page is better
than none listing all the various feeds you can pull from.

Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 51 insertions, 9 deletions

diff --git a/feeds.py b/feeds.py
index bc8a5b0c..e2fe36a6 100644
--- a/feeds.py
+++ b/feeds.py
@@ -1,14 +1,55 @@
 import datetime
-from django.contrib.syndication.feeds import Feed
-from archweb.main.models import Package, News
+
+from django.contrib.syndication.feeds import Feed, FeedDoesNotExist
+from django.db.models import Q
+from archweb.main.models import Arch, Repo, Package, News
 
 class PackageFeed(Feed):
-    title       = 'Arch Linux Recent Package Updates'
-    link       = '/packages/'
-    description = 'Recently updated packages in the Arch Linux package repositories.'
+    def get_object(self, bits):
+        # just cut the BS early
+        if len(bits) > 2:
+            raise FeedDoesNotExist
 
-    def items(self):
-        return Package.objects.select_related('arch', 'repo').order_by('-last_update')[:24]
+        obj = dict()
+        qs = Package.objects.select_related('arch', 'repo').order_by('-last_update')
+
+        if len(bits) > 0:
+            # feed for a single arch, also include 'any' packages everywhere
+            a = Arch.objects.get(name=bits[0])
+            qs = qs.filter(Q(arch=a) | Q(arch__name__iexact='any'))
+            obj['arch'] = a
+        if len(bits) > 1:
+            # feed for a single arch AND repo
+            r = Repo.objects.get(name=bits[1])
+            qs = qs.filter(repo=r)
+            obj['repo'] = r
+        obj['qs'] = qs[:50]
+        return obj
+
+    def title(self, obj):
+        s = 'Arch Linux: Recent package updates'
+        if 'repo' in obj:
+            s += ' (%s [%s])' % (obj['arch'].name, obj['repo'].name.lower())
+        elif 'arch' in obj:
+            s += ' (%s)' % (obj['arch'].name)
+        return s
+
+    def link(self, obj):
+        return '/packages/'
+
+    def description(self, obj):
+        s = 'Recently updated packages in the Arch Linux package repositories'
+        if 'arch' in obj:
+            s += ' for the \'%s\' architecture' % obj['arch'].name.lower()
+            if obj['arch'].name != 'any':
+                s += ' (including \'any\' packages)'
+        if 'repo' in obj:
+            s += ' in the [%s] repository' % obj['repo'].name.lower()
+        s += '.'
+        return s
+
+    def items(self, obj):
+        return obj['qs']
 
     def item_pubdate(self, item):
         return item.last_update
@@ -16,9 +57,10 @@ class PackageFeed(Feed):
     def item_categories(self, item):
         return (item.repo.name,item.arch.name)
 
+
 class NewsFeed(Feed):
-    title       = 'Arch Linux Recent News Updates'
-    link       = '/news/'
+    title = 'Arch Linux: Recent news updates'
+    link = '/news/'
     description = 'The latest and greatest news from the Arch Linux distribution.'
 
     def items(self):