Implement a basic event dispatcher

lib/uh/wm.rb

@@ -1,6 +1,7 @@
 require 'uh'
 
 require 'uh/wm/cli'
+require 'uh/wm/dispatcher'
 require 'uh/wm/env'
 require 'uh/wm/manager'
 require 'uh/wm/runner'

lib/uh/wm/dispatcher.rb

@@ -0,0 +1,27 @@
+module Uh
+  module WM
+    class Dispatcher
+      attr_reader :hooks
+
+      def initialize hooks = Hash.new
+        @hooks = hooks
+      end
+
+      def [] *key
+        @hooks[translate_key key] or []
+      end
+
+      def on *key, &block
+        @hooks[translate_key key] ||= []
+        @hooks[translate_key key] << block
+      end
+
+
+      private
+
+      def translate_key key
+        key.one? ? key[0] : key
+      end
+    end
+  end
+end