app.py

import streamlit as st
import pymupdf
import chromadb
from uuid import uuid4

@st.cache_resource
def initdb():
    chroma_client = chromadb.Client()
    collection = chroma_client.get_or_create_collection(name="rag_collection")
    return collection

st.write("## Local RAG \n Get Insights from your documents")

file = st.file_uploader("Upload your Document Here", type=['pdf'])

if file is not None:
    # Read file as bytes and save it.
    # PyMuPDF open can only load from file path
    bytes_data = file.getvalue()
    with open("data/uploaded_file.pdf", "wb") as fp:
        fp.write(bytes_data)
        doc = pymupdf.open(fp)

    texts = [str(page.get_text().encode("utf-8")) for page in doc]

    # VECTOR STORE
    collection = initdb()

    text_ids = [str(uuid4()) for text in texts]
    collection.add(documents=texts, ids=text_ids)
    st.write("Succesfully uploaded document to database.")