Deserialize (some) inputs.

lib/sibyl/input.rb

@@ -0,0 +1,23 @@
+module Sibyl
+  class InputHandler
+    class << self
+      def register(slug, handler)
+        handlers[slug] = handler
+      end
+
+      def deserialize(slug, input)
+        handlers[slug].call(input)
+      end
+
+    private
+      def handlers
+        default = lambda { |s| s }
+        @handlers ||= Hash.new { |h, k| h[k] = default }
+      end
+    end
+  end
+end
+
+Dir[File.expand_path("../input/*.rb", __FILE__)].each do |path|
+  require "sibyl/input/#{File.basename(path, ".rb")}"
+end

lib/sibyl/input/multiple.rb

@@ -0,0 +1 @@
+Sibyl::InputHandler.register "multiple", lambda { |s| s }

lib/sibyl/input/number.rb

@@ -0,0 +1 @@
+Sibyl::InputHandler.register "number", lambda { |s| s.to_f }

lib/sibyl/nodes.rb

@@ -1,4 +1,5 @@
 require "sibyl/errors"
+require "sibyl/input"
 
 module Sibyl
   module Nodes
@@ -72,7 +73,7 @@ def exits
       end
 
       def compute(input, context)
-        context.input = input
+        context.input = InputHandler.deserialize(type, input)
         statements.each do |s|
           s.execute(context)
         end

test/graph_test.rb

@@ -35,7 +35,7 @@ def graph(source)
     })
 
     assert_equal "How old are you?", g.at(["yes"]).name
-    assert_equal "Adult", g.at(["yes", 19]).name
+    assert_equal "Adult", g.at(["yes", "19"]).name
   end
 
   it "should raise an exception when inputs exceed steps" do
@@ -46,7 +46,7 @@ def graph(source)
     })
 
     assert_raises Sibyl::InvalidInput do
-      g.at([1, 2])
+      g.at(["1", "2"])
     end
   end
 end