additional changes

app.py

@@ -296,23 +296,26 @@ def set_up_chat_ui():
             # Apparently, Streamlit stores uploaded files in memory and clears on browser close
             # https://docs.streamlit.io/knowledge-base/using-streamlit/where-file-uploader-store-when-deleted
 
-        # get validated page range 
-        st.session_state['start_page'], st.session_state['end_page'] = filem.validate_page_range(
-                                                                                st.session_state['pdf_file'], 
-                                                                                st.session_state['start_page'],
-                                                                                st.session_state['end_page']
-                                                                            )
-        # show sidebar text for page selection and file name
-        with st.sidebar:
-            st.text(f'Extracting pages {st.session_state['start_page']} to {st.session_state['end_page']} in {st.session_state['pdf_file'].name}')
-
-        # get pdf contents
-        st.session_state[ADDITIONAL_INFO] = filem.get_pdf_contents(
-                                                    st.session_state['pdf_file'], 
-                                                    (st.session_state['start_page'], 
-                                                    st.session_state['end_page'])
-                                                )
-        
+        # # check if pdf file is uploaded 
+        # # (we can use the same file if the user doesn't upload a new one)
+        if 'pdf_file' in st.session_state:  
+            # get validated page range 
+            st.session_state['start_page'], st.session_state['end_page'] = filem.validate_page_range(
+                                                                                    st.session_state['pdf_file'], 
+                                                                                    st.session_state['start_page'],
+                                                                                    st.session_state['end_page']
+                                                                                )
+            # show sidebar text for page selection and file name
+            with st.sidebar:
+                st.text(f'Extracting pages {st.session_state["start_page"]} to {st.session_state["end_page"]} in {st.session_state["pdf_file"].name}')
+
+            # get pdf contents
+            st.session_state[ADDITIONAL_INFO] = filem.get_pdf_contents(
+                                                        st.session_state['pdf_file'], 
+                                                        (st.session_state['start_page'], 
+                                                        st.session_state['end_page'])
+                                                    )
+            
         provider, llm_name = llm_helper.get_provider_model(
             llm_provider_to_use,
             use_ollama=RUN_IN_OFFLINE_MODE

helpers/file_manager.py

@@ -32,7 +32,7 @@ def get_pdf_contents(
 
     start, end = page_range  # set start and end per the range (user-specified values)
     
-
+    print(f"Name: {pdf_file.name} Page range: {start} to {end}")
     text = ''
     for page_num in range(start - 1, end):
         page = reader.pages[page_num]

strings.json

@@ -35,6 +35,6 @@
         "Did you know that SlideDeck AI supports eight LLMs that generate contents in different styles?",
         "Did you know that SlideDeck AI can create a presentation based on any uploaded PDF file?"
     ],
-    "chat_placeholder": "Click or drop to upload a PDF and write the topic or instructions here.",
+    "chat_placeholder": "Write the topic or instructions here. You can also upload a PDF file.",
     "like_feedback": "If you like SlideDeck AI, please consider leaving a heart ❤\uFE0F on the [Hugging Face Space](https://huggingface.co/spaces/barunsaha/slide-deck-ai/) or a star ⭐ on [GitHub](https://github.com/barun-saha/slide-deck-ai). Your [feedback](https://forms.gle/JECFBGhjvSj7moBx9) is appreciated."
 }