From 55c956b346dfb26a0ac5a5686f4be7f96b28cff6 Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Sat, 31 Jan 2015 15:05:58 -0800
Subject: Add a disconnect callback

---
 lib/action_cable/channel/base.rb | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/action_cable/channel/base.rb b/lib/action_cable/channel/base.rb
index 40af1462b4..ae8822d2a2 100644
--- a/lib/action_cable/channel/base.rb
+++ b/lib/action_cable/channel/base.rb
@@ -5,9 +5,11 @@ module ActionCable
       include Callbacks
       include Redis
 
-      on_subscribe :start_periodic_timers
+      on_subscribe   :start_periodic_timers
       on_unsubscribe :stop_periodic_timers
 
+      on_unsubscribe :disconnect
+
       attr_reader :params
 
       class_attribute :channel_name
@@ -54,6 +56,10 @@ module ActionCable
           # Override in subclasses
         end
 
+        def disconnect
+          # Override in subclasses
+        end
+
         def broadcast(data)
           @connection.broadcast({ identifier: @channel_identifier, message: data }.to_json)
         end
-- 
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