Update app.py

app.py

@@ -13,108 +13,80 @@ import requests
 from io import StringIO
 from pdfminer.high_level import extract_text_to_fp
 from pdfminer.layout import LAParams
-from twilio.base.exceptions import TwilioRestException  # Add this at the top
+from twilio.base.exceptions import TwilioRestException
 import pdfplumber
 import datetime
 import csv
 
 APP_START_TIME = datetime.datetime.now(datetime.timezone.utc)
-
 os.environ["PYTORCH_JIT"] = "0"
 
-# --- PDF Extraction ---
+# ---------------- PDF & DOCX Extraction ----------------
 def _extract_tables_from_page(page):
-    """Extracts tables from a single page of a PDF."""
-
     tables = page.extract_tables()
-    if not tables:
-        return []
-
     formatted_tables = []
     for table in tables:
         formatted_table = []
         for row in table:
-            if row:  # Filter out empty rows
-                formatted_row = [cell if cell is not None else "" for cell in row]  # Replace None with ""
-                formatted_table.append(formatted_row)
-            else:
-                formatted_table.append([""])  # Append an empty row if the row is None
+            formatted_row = [cell if cell is not None else "" for cell in row]
+            formatted_table.append(formatted_row)
         formatted_tables.append(formatted_table)
     return formatted_tables
-    
+
 def extract_text_from_pdf(pdf_path):
     text_output = StringIO()
     all_tables = []
     try:
         with pdfplumber.open(pdf_path) as pdf:
             for page in pdf.pages:
-                # Extract tables
-                page_tables = _extract_tables_from_page(page)
-                if page_tables:
-                    all_tables.extend(page_tables)
-                # Extract text
+                all_tables.extend(_extract_tables_from_page(page))
                 text = page.extract_text()
                 if text:
                     text_output.write(text + "\n\n")
     except Exception as e:
-        print(f"Error extracting with pdfplumber: {e}")
-        # Fallback to pdfminer if pdfplumber fails
+        print(f"pdfplumber error: {e}")
         with open(pdf_path, 'rb') as file:
-            extract_text_to_fp(file, text_output, laparams=LAParams(), output_type='text', codec=None)
-    extracted_text = text_output.getvalue()
-    return extracted_text, all_tables  # Return text and list of tables
-
-def clean_extracted_text(text):
-    lines = text.splitlines()
-    cleaned = []
-    for line in lines:
-        line = line.strip()
-        if line:
-            line = ' '.join(line.split())
-            cleaned.append(line)
-    return '\n'.join(cleaned)
+            extract_text_to_fp(file, text_output, laparams=LAParams(), output_type='text')
+    return text_output.getvalue(), all_tables
 
 def _format_tables_internal(tables):
-    """Formats extracted tables into a string representation."""
-
     formatted_tables_str = []
     for table in tables:
-        # Use csv writer to handle commas and quotes correctly
         with StringIO() as csvfile:
-            csvwriter = csv.writer(csvfile)
-            csvwriter.writerows(table)
+            writer = csv.writer(csvfile)
+            writer.writerows(table)
             formatted_tables_str.append(csvfile.getvalue())
     return "\n\n".join(formatted_tables_str)
 
-# --- DOCX Extraction ---
+def clean_extracted_text(text):
+    return '\n'.join(' '.join(line.strip().split()) for line in text.splitlines() if line.strip())
+
 def extract_text_from_docx(docx_path):
     try:
         doc = docx.Document(docx_path)
         return '\n'.join(para.text for para in doc.paragraphs)
-    except Exception:
+    except:
         return ""
 
-# --- Chunking ---
-def chunk_text(text, tokenizer, chunk_size=128, chunk_overlap=32, max_tokens=512):
+# ---------------- Chunking ----------------
+def chunk_text(text, tokenizer, chunk_size=128, chunk_overlap=32):
     tokens = tokenizer.tokenize(text)
     chunks = []
     start = 0
     while start < len(tokens):
         end = min(start + chunk_size, len(tokens))
-        chunk_tokens = tokens[start:end]
-        chunk_text = tokenizer.convert_tokens_to_string(chunk_tokens)
-        chunks.append(chunk_text)
-        if end == len(tokens):
-            break
+        chunk = tokens[start:end]
+        chunks.append(tokenizer.convert_tokens_to_string(chunk))
+        if end == len(tokens): break
         start += chunk_size - chunk_overlap
     return chunks
 
 def retrieve_chunks(question, index, embed_model, text_chunks, k=3):
-    question_embedding = embed_model.encode(question)
-    D, I = index.search(np.array([question_embedding]), k)
+    q_embedding = embed_model.encode(question)
+    D, I = index.search(np.array([q_embedding]), k)
     return [text_chunks[i] for i in I[0]]
 
-# --- Groq Answer Generator ---
+# ---------------- Groq Answer Generator ----------------
 def generate_answer_with_groq(question, context):
     url = "https://api.groq.com/openai/v1/chat/completions"
     api_key = os.environ.get("GROQ_API_KEY")
@@ -133,9 +105,8 @@ def generate_answer_with_groq(question, context):
             {
                 "role": "system",
                 "content": (
-                    "You are ToyBot, a friendly and helpful WhatsApp assistant for an online toy shop. "
-                    "Your goal is to politely answer customer questions, help them choose the right toys, "
-                    "provide order or delivery information, explain return policies, and guide them through purchases."
+                    "You are ToyBot, a friendly WhatsApp assistant for an online toy shop. "
+                    "Help customers with toys, delivery, and returns in a helpful tone."
                 )
             },
             {"role": "user", "content": prompt},
@@ -147,7 +118,7 @@ def generate_answer_with_groq(question, context):
     response.raise_for_status()
     return response.json()['choices'][0]['message']['content'].strip()
 
-# --- Twilio Functions ---
+# ---------------- Twilio Integration ----------------
 def fetch_latest_incoming_message(client, conversation_sid):
     try:
         messages = client.conversations.v1.conversations(conversation_sid).messages.list()
@@ -160,14 +131,7 @@ def fetch_latest_incoming_message(client, conversation_sid):
                     "timestamp": msg.date_created,
                 }
     except TwilioRestException as e:
-        if e.status == 404:
-            print(f"Conversation {conversation_sid} not found, skipping...")
-        else:
-            print(f"Twilio error fetching messages for {conversation_sid}:", e)
-    except Exception as e:
-        #print(f"Unexpected error in fetch_latest_incoming_message for {conversation_sid}:", e)
-        pass
-
+        print(f"Twilio error: {e}")
     return None
 
 def send_twilio_message(client, conversation_sid, body):
@@ -175,121 +139,77 @@ def send_twilio_message(client, conversation_sid, body):
         author="system", body=body
     )
 
-# --- Load Knowledge Base ---
+# ---------------- Knowledge Base Setup ----------------
 def setup_knowledge_base():
     folder_path = "docs"
     all_text = ""
 
-    # Process PDFs
     for filename in ["FAQ.pdf", "ProductReturnPolicy.pdf"]:
         pdf_path = os.path.join(folder_path, filename)
         text, tables = extract_text_from_pdf(pdf_path)
         all_text += clean_extracted_text(text) + "\n"
         all_text += _format_tables_internal(tables) + "\n"
 
-    # Process CSVs
-    for filename in ["CustomerOrders.csv"]:
-        csv_path = os.path.join(folder_path, filename)
+    for filename in ["CustomerOrders.csv", "Products.csv"]:
+        path = os.path.join(folder_path, filename)
         try:
-            with open(csv_path, newline='', encoding='utf-8') as csvfile:
+            with open(path, newline='', encoding='utf-8') as csvfile:
                 reader = csv.DictReader(csvfile)
                 for row in reader:
-                    line = f"Order ID: {row.get('OrderID')} | Customer Name: {row.get('CustomerName')} | Order Date: {row.get('OrderDate')} | ProductID: {row.get('ProductID')} | Date: {row.get('OrderDate')} | Quantity: {row.get('Quantity')} | UnitPrice(USD): {row.get('UnitPrice(USD)')} | TotalPrice(USD): {row.get('TotalPrice(USD)')} | ShippingAddress: {row.get('ShippingAddress')} | OrderStatus: {row.get('OrderStatus')}"
+                    line = ' | '.join(f"{k}: {v}" for k, v in row.items())
                     all_text += line + "\n"
         except Exception as e:
-            print(f"❌ Error reading {filename}: {e}")
+            print(f"CSV read error: {e}")
 
-    for filename in ["Products.csv"]:
-        csv_path = os.path.join(folder_path, filename)
-        try:
-            with open(csv_path, newline='', encoding='utf-8') as csvfile:
-                reader = csv.DictReader(csvfile)
-                for row in reader:
-                    line = f"Product ID: {row.get('ProductID')} | Toy Name: {row.get('ToyName')} | Category: {row.get('Category')} | Price(USD): {row.get('Price(USD)')} | Stock Quantity: {row.get('StockQuantity')} | Description: {row.get('Description')}"
-                    all_text += line + "\n"
-        except Exception as e:
-            print(f"❌ Error reading {filename}: {e}")
-
-    # Tokenization & chunking
     tokenizer = AutoTokenizer.from_pretrained('bert-base-uncased')
     chunks = chunk_text(all_text, tokenizer)
     model = SentenceTransformer('all-mpnet-base-v2')
-    embeddings = model.encode(chunks, show_progress_bar=False, truncation=True, max_length=512)
+    embeddings = model.encode(chunks, show_progress_bar=False)
     dim = embeddings[0].shape[0]
     index = faiss.IndexFlatL2(dim)
     index.add(np.array(embeddings).astype('float32'))
     return index, model, chunks
 
-
-
-# --- Monitor Conversations ---
+# ---------------- Monitor Twilio Conversations ----------------
 def start_conversation_monitor(client, index, embed_model, text_chunks):
     processed_convos = set()
     last_processed_timestamp = {}
 
-    def poll_conversation(convo_sid):
-        while True:
-            try:
-                latest_msg = fetch_latest_incoming_message(client, convo_sid)
-                if latest_msg:
-                    msg_time = latest_msg["timestamp"]
-                    if convo_sid not in last_processed_timestamp or msg_time > last_processed_timestamp[convo_sid]:
-                        last_processed_timestamp[convo_sid] = msg_time
-                        question = latest_msg["body"]
-                        sender = latest_msg["author"]
-                        print(f"\n📥 New message from {sender} in {convo_sid}: {question}")
-                        context = "\n\n".join(retrieve_chunks(question, index, embed_model, text_chunks))
-                        answer = generate_answer_with_groq(question, context)
-                        send_twilio_message(client, convo_sid, answer)
-                        print(f"📤 Replied to {sender}: {answer}")
-                time.sleep(3)
-            except Exception as e:
-                print(f"❌ Error in convo {convo_sid} polling:", e)
-                time.sleep(5)
-
-    def poll_new_conversations():
-        print("➡️ Monitoring for new WhatsApp conversations...")
+    def poll_convo(convo_sid):
         while True:
-            try:
-                conversations = client.conversations.v1.conversations.list(limit=20)
-                for convo in conversations:
-                    convo_full = client.conversations.v1.conversations(convo.sid).fetch()
-                    if convo.sid not in processed_convos and convo_full.date_created > APP_START_TIME:
-                        participants = client.conversations.v1.conversations(convo.sid).participants.list()
-                        for p in participants:
-                            address = p.messaging_binding.get("address", "") if p.messaging_binding else ""
-                            if address.startswith("whatsapp:"):
-                                print(f"🆕 New WhatsApp convo found: {convo.sid}")
-                                processed_convos.add(convo.sid)
-                                threading.Thread(target=poll_conversation, args=(convo.sid,), daemon=True).start()
-            except Exception as e:
-                print("❌ Error polling conversations:", e)
+            latest_msg = fetch_latest_incoming_message(client, convo_sid)
+            if latest_msg:
+                msg_time = latest_msg["timestamp"]
+                if convo_sid not in last_processed_timestamp or msg_time > last_processed_timestamp[convo_sid]:
+                    last_processed_timestamp[convo_sid] = msg_time
+                    question = latest_msg["body"]
+                    sender = latest_msg["author"]
+                    print(f"📩 New message from {sender}: {question}")
+                    context = "\n\n".join(retrieve_chunks(question, index, embed_model, text_chunks))
+                    answer = generate_answer_with_groq(question, context)
+                    send_twilio_message(client, convo_sid, answer)
             time.sleep(5)
 
-    # ✅ Launch conversation polling monitor
-    threading.Thread(target=poll_new_conversations, daemon=True).start()
+    for convo in client.conversations.v1.conversations.list():
+        if convo.sid not in processed_convos:
+            processed_convos.add(convo.sid)
+            threading.Thread(target=poll_convo, args=(convo.sid,), daemon=True).start()
 
+# ---------------- Main Entry ----------------
+if _name_ == "_main_":
+    st.title("🤖 ToyBot WhatsApp Assistant")
+    st.write("Initializing knowledge base...")
 
-
-# --- Streamlit UI ---
-st.set_page_config(page_title="Quasa – A Smart WhatsApp Chatbot", layout="wide")
-st.title("📱 Quasa – A Smart WhatsApp Chatbot")
-
-account_sid = st.secrets.get("TWILIO_SID")
-auth_token = st.secrets.get("TWILIO_TOKEN")
-GROQ_API_KEY = st.secrets.get("GROQ_API_KEY")
-
-if not all([account_sid, auth_token, GROQ_API_KEY]):
-    st.warning("⚠️ Provide all credentials below:")
-    account_sid = st.text_input("Twilio SID", value=account_sid or "")
-    auth_token = st.text_input("Twilio Token", type="password", value=auth_token or "")
-    GROQ_API_KEY = st.text_input("GROQ API Key", type="password", value=GROQ_API_KEY or "")
-
-if all([account_sid, auth_token, GROQ_API_KEY]):
-    os.environ["GROQ_API_KEY"] = GROQ_API_KEY
-    client = Client(account_sid, auth_token)
-
-    st.success("🟢 Monitoring new WhatsApp conversations...")
     index, model, chunks = setup_knowledge_base()
-    threading.Thread(target=start_conversation_monitor, args=(client, index, model, chunks), daemon=True).start()
-    st.info("⏳ Waiting for new messages...")
+
+    st.success("Knowledge base loaded.")
+    st.write("Waiting for WhatsApp messages...")
+
+    account_sid = os.environ.get("TWILIO_ACCOUNT_SID")
+    auth_token = os.environ.get("TWILIO_AUTH_TOKEN")
+    if not account_sid or not auth_token:
+        st.error("❌ Twilio credentials not set.")
+    else:
+        client = Client(account_sid, auth_token)
+        start_conversation_monitor(client, index, model, chunks)
+        st.info("✅ Bot is now monitoring Twilio conversations.")