Update app.py

app.py

@@ -5,30 +5,46 @@ from huggingface_hub import InferenceClient
 from fpdf import FPDF
 import uuid
 
+from urllib.request import urlretrieve
+import os
+
+FONT_DIR = "/tmp/fonts"
+FONT_PATH = os.path.join(FONT_DIR, "DejaVuSans.ttf")
+
+# Create font dir and download font only if needed
+os.makedirs(FONT_DIR, exist_ok=True)
+if not os.path.exists(FONT_PATH):
+    urlretrieve(
+        "https://github.com/dejavu-fonts/dejavu-fonts/raw/master/ttf/DejaVuSans.ttf",
+        FONT_PATH
+    )
+
 def generate_pdf_from_chat(chat_history):
-    if not chat_history or not isinstance(chat_history, list) or len(chat_history) == 0:
+    if not chat_history or not isinstance(chat_history, list):
         return None
 
-    # Extract the last assistant message (i.e. the bot's response)
     try:
         last_response = chat_history[-1][1]
     except (IndexError, TypeError):
         last_response = "No response available."
 
-    # Create a unique file path
-    file_name = f"/tmp/chat_response_{uuid.uuid4().hex}.pdf"
+    file_path = f"/tmp/chat_response_{uuid.uuid4().hex}.pdf"
 
-    # Create PDF
+    # Create PDF with Unicode support
     pdf = FPDF()
     pdf.add_page()
+
+    # Register Unicode font
+    pdf.add_font("DejaVu", "", FONT_PATH, uni=True)
+    pdf.set_font("DejaVu", size=12)
     pdf.set_auto_page_break(auto=True, margin=15)
-    pdf.set_font("Arial", size=12)
 
+    # Add the text safely
     for line in last_response.split("\n"):
         pdf.multi_cell(0, 10, line)
 
-    pdf.output(file_name)
-    return file_name
+    pdf.output(file_path)
+    return file_path
 
 #_______________________________________________________________________