examples/lemma_verification.rb in noam_lemma-0.2.1.1 vs examples/lemma_verification.rb in noam_lemma-0.2.1.2

@@ -1,43 +1,90 @@
 require "noam_lemma"
 
 class Noam::LemmaVerification
   def self.run
-    echo
-    plus_one
-    sum
-    name
+    VerifyUsingReturns.new.run
+    VerifyUsingBlocks.new.run
   end
 
-  def self.echo
-    lemma = Noam::Lemma.new("verification", ["Echo"], ["EchoVerify"])
-    lemma.advertise("lemma_verification")
-    event = lemma.listen
-    lemma.speak("EchoVerify", event.value)
-    lemma.stop
-  end
+  class VerifyTemplate
+    attr_reader :lemma
 
-  def self.plus_one
-    lemma = Noam::Lemma.new("verification", ["PlusOne"], ["PlusOneVerify"])
-    lemma.advertise("lemma_verification")
-    event = lemma.listen
-    lemma.speak("PlusOneVerify", event.value + 1)
-    lemma.stop
+    def run
+      lemma.advertise("lemma_verification")
+      verify
+      lemma.stop
+    end
+
+    private
+
+    def echo(event)
+      lemma.speak("EchoVerify", event.value)
+    end
+
+    def plus_one(event)
+      lemma.speak("PlusOneVerify", event.value + 1)
+    end
+
+    def sum(event)
+      lemma.speak("SumVerify", event.value.inject {|sum, v| sum + v})
+    end
+
+    def name(event)
+      fullname = "#{event.value["firstName"]} #{event.value["lastName"]}"
+      lemma.speak("NameVerify", {fullName: fullname})
+    end
+
+    def events
+      ["Echo", "PlusOne", "Sum", "Name"]
+    end
+
+    def speaks
+      ["EchoVerify", "PlusOneVerify", "SumVerify", "NameVerify"]
+    end
   end
 
-  def self.sum
-    lemma = Noam::Lemma.new("verification", ["Sum"], ["SumVerify"])
-    lemma.advertise("lemma_verification")
-    event = lemma.listen
-    lemma.speak("SumVerify", event.value.inject {|sum, v| sum + v})
-    lemma.stop
+  class VerifyUsingReturns < VerifyTemplate
+    def initialize
+      @lemma ||= Noam::Lemma.new("verification", events, speaks)
+    end
+
+    private
+
+    def verify
+      events.length.times { handle_event(lemma.listen) }
+    end
+
+    def handle_event(event)
+      case event.event
+      when "Echo"
+        echo(event)
+      when "PlusOne"
+        plus_one(event)
+      when "Sum"
+        sum(event)
+      when "Name"
+        name(event)
+      end
+    end
   end
 
-  def self.name
-    lemma = Noam::Lemma.new("verification", ["Name"], ["NameVerify"])
-    lemma.advertise("lemma_verification")
-    event = lemma.listen
-    fullname = "#{event.value["firstName"]} #{event.value["lastName"]}"
-    lemma.speak("NameVerify", {fullName: fullname})
-    lemma.stop
+  class VerifyUsingBlocks < VerifyTemplate
+    def initialize
+      @lemma = Noam::Lemma.new("verification")
+      prepare_lemma
+    end
+
+    private
+
+    def prepare_lemma
+      lemma.hear("Echo")    {|event| echo(event)}
+      lemma.hear("PlusOne") {|event| plus_one(event)}
+      lemma.hear("Sum")     {|event| sum(event)}
+      lemma.hear("Name")    {|event| name(event)}
+    end
+
+    def verify
+      events.length.times { lemma.listen }
+    end
   end
 end