From a00dd619c16a27f16b3894abe0e4e7c2d2f11d1b Mon Sep 17 00:00:00 2001
From: DualFroz <me@dualfroz.com>
Date: Wed, 26 Aug 2026 14:20:00 +0200
Subject: [PATCH] feat(middleware): add middleware stack builder

---
 lib/prism/middleware.rb | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 lib/prism/middleware.rb

diff --git a/lib/prism/middleware.rb b/lib/prism/middleware.rb
new file mode 100644
index 0000000..1e89648
--- /dev/null
+++ b/lib/prism/middleware.rb
@@ -0,0 +1,25 @@
+module Prism
+  class MiddlewareStack
+    def initialize
+      @entries = []
+    end
+
+    def use(middleware, *args, **kwargs, &block)
+      @entries << [middleware, args, kwargs, block]
+    end
+
+    def build(app)
+      @entries.reverse.reduce(app) do |inner, (middleware, args, kwargs, block)|
+        if kwargs.empty?
+          middleware.new(inner, *args, &block)
+        else
+          middleware.new(inner, *args, **kwargs, &block)
+        end
+      end
+    end
+
+    def empty?
+      @entries.empty?
+    end
+  end
+end