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src/streamlit_app.py

@@ -123,43 +123,77 @@ def show_upload_documents():
     st.title("📤 Upload Documents")
     st.markdown("---")
     
+    # Add information about file upload
+    st.info("💡 **Note:** File upload is optimized for Hugging Face Spaces. If you experience issues, try refreshing the page.")
+    
     uploaded_file = st.file_uploader(
         "Choose a PDF file",
         type=['pdf'],
-        help="Upload PDF documents to the LMS"
+        help="Upload PDF documents to the LMS (max 200MB)",
+        accept_multiple_files=False
     )
     
     if uploaded_file is not None:
-        # Display file info
-        file_details = {
-            "Filename": uploaded_file.name,
-            "File size": f"{uploaded_file.size / 1024:.2f} KB",
-            "File type": uploaded_file.type
-        }
-        
-        st.write("**File Details:**")
-        for key, value in file_details.items():
-            st.write(f"- {key}: {value}")
-        
-        # Extract and display PDF content
-        pdf_text = extract_pdf_text(uploaded_file)
-        
-        if pdf_text.strip():
-            st.subheader("📄 Document Preview")
-            with st.expander("View extracted text"):
-                st.text_area("PDF Content", pdf_text, height=300)
-        
-        # Upload button
-        if st.button("Upload Document"):
-            # Save document info
-            save_document_info(
-                uploaded_file.name,
-                uploaded_file.read(),
-                "PDF"
-            )
+        try:
+            # Display file info
+            file_details = {
+                "Filename": uploaded_file.name,
+                "File size": f"{uploaded_file.size / 1024:.2f} KB",
+                "File type": uploaded_file.type
+            }
+            
+            st.write("**File Details:**")
+            for key, value in file_details.items():
+                st.write(f"- {key}: {value}")
+            
+            # Extract and display PDF content
+            pdf_text = extract_pdf_text(uploaded_file)
             
-            st.success(f"✅ Document '{uploaded_file.name}' uploaded successfully!")
-            st.balloons()
+            if pdf_text.strip():
+                st.subheader("📄 Document Preview")
+                with st.expander("View extracted text"):
+                    st.text_area("PDF Content", pdf_text, height=300)
+            else:
+                st.warning("⚠️ Could not extract text from this PDF. The file may be image-based or encrypted.")
+            
+            # Upload button
+            if st.button("Upload Document", type="primary"):
+                try:
+                    # Reset file pointer to beginning
+                    uploaded_file.seek(0)
+                    
+                    # Save document info
+                    save_document_info(
+                        uploaded_file.name,
+                        uploaded_file.read(),
+                        "PDF"
+                    )
+                    
+                    st.success(f"✅ Document '{uploaded_file.name}' uploaded successfully!")
+                    st.balloons()
+                    
+                    # Clear the file uploader
+                    st.rerun()
+                    
+                except Exception as e:
+                    st.error(f"❌ Error uploading document: {str(e)}")
+                    st.info("💡 Try uploading a smaller file or refresh the page.")
+                    
+        except Exception as e:
+            st.error(f"❌ Error processing file: {str(e)}")
+            st.info("💡 Please try uploading a different PDF file.")
+    
+    # Add helpful tips
+    with st.expander("💡 Upload Tips"):
+        st.markdown("""
+        **For best results:**
+        - Use PDF files under 200MB
+        - Ensure PDFs contain text (not just images)
+        - Avoid password-protected PDFs
+        - If upload fails, try refreshing the page
+        
+        **Supported formats:** PDF only
+        """)
 
 def show_my_documents():
     """Show uploaded documents"""