From 06ed8e451198b2296d8b2752741e259b4f995081 Mon Sep 17 00:00:00 2001
From: Joshua Peek <josh@joshpeek.com>
Date: Mon, 1 Dec 2008 13:48:47 -0600
Subject: Add internal middleware stack to Dispatcher

  config.middleware.use Rack::Cache
---
 .../lib/action_controller/middleware_stack.rb      | 42 ++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 actionpack/lib/action_controller/middleware_stack.rb

(limited to 'actionpack/lib/action_controller/middleware_stack.rb')

diff --git a/actionpack/lib/action_controller/middleware_stack.rb b/actionpack/lib/action_controller/middleware_stack.rb
new file mode 100644
index 0000000000..1864bed23a
--- /dev/null
+++ b/actionpack/lib/action_controller/middleware_stack.rb
@@ -0,0 +1,42 @@
+module ActionController
+  class MiddlewareStack < Array
+    class Middleware
+      attr_reader :klass, :args, :block
+
+      def initialize(klass, *args, &block)
+        @klass = klass.is_a?(Class) ? klass : klass.to_s.constantize
+        @args = args
+        @block = block
+      end
+
+      def ==(middleware)
+        case middleware
+        when Middleware
+          klass == middleware.klass
+        when Class
+          klass == middleware
+        else
+          klass == middleware.to_s.constantize
+        end
+      end
+
+      def inspect
+        str = @klass.to_s
+        @args.each { |arg| str += ", #{arg.inspect}" }
+        str
+      end
+
+      def build(app)
+        klass.new(app, *args, &block)
+      end
+    end
+
+    def use(*args, &block)
+      push(Middleware.new(*args, &block))
+    end
+
+    def build(app)
+      reverse.inject(app) { |a, e| e.build(a) }
+    end
+  end
+end
-- 
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