Allow setting barge per-prompt

lib/adhearsion-ivr/ivr_controller.rb

@@ -130,11 +130,15 @@ def run
       deliver_prompt true
     end
 
-    def deliver_prompt(interruptible = self.class.barge)
+    def deliver_prompt(interruptible = nil)
       prompt = prompts[@errors] || prompts.last
       prompt = instance_exec(&prompt) if prompt.respond_to? :call
       logger.debug "Prompt: #{prompt.inspect}"
 
+      if interruptible.nil?
+        interruptible = self.barge
+      end
+
       if grammar
         ask_options = { grammar: grammar, mode: :voice }
       elsif grammar_url
@@ -188,6 +192,20 @@ def prompts
       self.class.prompts
     end
 
+    def barge(val = nil)
+      if val.nil?
+        if @barge.nil?
+          self.class.barge
+        else
+          old = @barge
+          @barge = nil
+          old
+        end
+      else
+        @barge = val
+      end
+    end
+
     def max_attempts
       self.class.max_attempts
     end

spec/adhearsion-ivr/ivr_controller_spec.rb

@@ -677,5 +677,33 @@ def grammar
         controller.run
       end
     end
+
+    context 'when overriding barge per-prompt' do
+      context 'with default barge behaviour' do # Only first prompt bargeable
+        let(:controller_class) do
+          Class.new(Adhearsion::IVRController) do
+            prompts << -> { 'first' }  # Bargeable
+            prompts << -> { 'second' }  # Unbargeable
+            prompts << -> { self.barge true; 'third' }  # Bargeable
+
+            on_complete do |result|
+              say "Let's go to #{result.utterance}"
+            end
+
+            def grammar
+              :some_grammar
+            end
+          end
+        end
+
+        it 'allows interruption of each prompt correctly' do
+          controller.should_receive(:ask).once.with('first', grammar: :some_grammar, mode: :voice, interruptible: true).and_return noinput_result
+          controller.should_receive(:ask).once.with('second', grammar: :some_grammar, mode: :voice, interruptible: false).and_return noinput_result
+          controller.should_receive(:ask).once.with('third', grammar: :some_grammar, mode: :voice, interruptible: true).and_return match_result
+          controller.should_receive(:say).once.with "Let's go to Paris"
+          controller.run
+        end
+      end
+    end
   end
 end