Cache most recent messages

1 files changed, 34 insertions, 0 deletions

diff --git a/lib/cache.rb b/lib/cache.rb
index c2968d1..f635114 100644
--- a/lib/cache.rb
+++ b/lib/cache.rb
@@ -32,4 +32,38 @@ class MessageCountCache
       update!
     end
   end
+end
+
+class MostRecentMessagesCache
+  include Singleton
+  CACHE_SECONDS=3600
+
+  def initialize
+    update!
+  end
+
+  def update!
+    @messages ||= {}
+
+    @new_messages = {}
+    [$config['active_lists'], $config['frozen_lists']].flatten.each do |list|
+      @new_messages[list] = most_recent(list, 5)
+    end
+
+    @messages = @new_messages
+    @load_date = DateTime.now
+  end
+
+  def [](list)
+    update?
+
+    @messages[list] || []
+  end
+
+  private
+  def update?
+    if ((DateTime.now - @load_date) * 60 * 60 * 24).to_i > CACHE_SECONDS
+      update!
+    end
+  end
 end
\ No newline at end of file