add validation

app.py

@@ -135,9 +135,13 @@ class SummarizerAndQA:
         return generate_summary(text)
 
     def process_questions(self):
+        if not self.is_text_loaded:
+            return "Primero ingresa el texto en la seccion de Resumen"
         return generate_questions(self.input_text)
 
     def process_question_response(self, question, history):
+        if not self.is_text_loaded:
+            return "Primero ingresa el texto en la seccion de Resumen"
         return generate_question_response(question, self.input_text)
 
 summarizer_and_qa = SummarizerAndQA()