From 69492f9a52b431ae5803897e0f5b3efe99dbfc2b Mon Sep 17 00:00:00 2001
From: Samuel Clay <samuel@ofbrooklyn.com>
Date: Tue, 2 Jul 2013 12:02:41 -0700
Subject: [PATCH] Adding read story trimmer.

---
 apps/reader/models.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/apps/reader/models.py b/apps/reader/models.py
index bd5e478ee..17ae3f568 100644
--- a/apps/reader/models.py
+++ b/apps/reader/models.py
@@ -385,7 +385,20 @@ class UserSubscription(models.Model):
                 feeds[feed_id]['exception_code'] = sub.feed.exception_code
 
         return feeds
+    
+    def sync_redis(self, r=None):
+        if not r:
+            r = redis.Redis(connection_pool=settings.REDIS_STORY_HASH_POOL)
         
+        read_stories_key = "RS:%s:%s" % (self.user_id, self.feed_id)
+        stale_story_hashes = r.sdiff(read_stories_key, "F:%s" % self.feed_id)
+        if not stale_story_hashes:
+            return
+        
+        logging.user(self.user, "~FBTrimming %s read stories..." % (len(stale_story_hashes)))
+        r.srem(read_stories_key, *stale_story_hashes)
+        r.srem("RS:%s" % self.feed_id, *stale_story_hashes)
+    
     def mark_feed_read(self):
         if (self.unread_count_negative == 0
             and self.unread_count_neutral == 0