Merge and unmerge timelines on follow/unfollow, solves #21, #22

app/services/unfollow_service.rb

@@ -5,5 +5,20 @@ class UnfollowService < BaseService
   def call(source_account, target_account)
     follow = source_account.unfollow!(target_account)
     NotificationWorker.perform_async(follow.stream_entry.id, target_account.id) unless target_account.local?
+    unmerge_from_timeline(target_account, source_account)
+  end
+
+  private
+
+  def unmerge_from_timeline(from_account, into_account)
+    timeline_key = FeedManager.instance.key(:home, into_account.id)
+
+    from_account.statuses.find_each do |status|
+      redis.zrem(timeline_key, status.id)
+    end
+  end
+
+  def redis
+    $redis
   end
 end