add _safe_enqueue_text_to_speak

streaming_chat_service.py

@@ -50,6 +50,18 @@ class StreamingChatService:
 
         text_to_speak = sentence[:last_termination_index+1]
         return text_to_speak
+    
+    def _safe_enqueue_text_to_speak(self, text_to_speak):
+        # exit if empty, white space or an single breaket
+        if text_to_speak.isspace():
+            return
+        # exit if not letters or numbers
+        has_letters = any(char.isalpha() for char in text_to_speak)
+        has_numbers = any(char.isdigit() for char in text_to_speak)
+        if not has_letters and not has_numbers:
+            return
+        stream = self._speech_service.stream(text_to_speak)
+        self._audio_processor.add_audio_stream(stream)        
 
     def respond_to(self, prompt):
         self._messages.append({"role": "user", "content": prompt})
@@ -72,14 +84,12 @@ class StreamingChatService:
                 agent_response += chunk_text
                 text_to_speak = self._should_we_send_to_voice(current_sentence)
                 if text_to_speak:
-                    stream = self._speech_service.stream(text_to_speak)
-                    self._audio_processor.add_audio_stream(stream)
+                    self._safe_enqueue_text_to_speak(text_to_speak)
                     print(text_to_speak)
                     current_sentence = current_sentence[len(text_to_speak):]
 
         if len(current_sentence) > 0:
-            stream = self._speech_service.stream(current_sentence)
-            self._audio_processor.add_audio_stream(stream)
+            self._safe_enqueue_text_to_speak(current_sentence)
             print(current_sentence)
         self._messages.append({"role": "assistant", "content": agent_response})
         return agent_response