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"""
File manager helper to work with uploaded files.
"""
import logging
import os
import sys
import streamlit as st
from pypdf import PdfReader
sys.path.append('..')
sys.path.append('../..')
from global_config import GlobalConfig
logger = logging.getLogger(__name__)
def get_pdf_contents(
pdf_file: st.runtime.uploaded_file_manager.UploadedFile,
page_range: tuple[int, int],
max_pages: int = GlobalConfig.MAX_PAGE_COUNT
) -> str:
"""
Extract the text contents from a PDF file.
:param pdf_file: The uploaded PDF file.
:param page_range: The range of pages to extract contents from.
:param max_pages: The max no. of pages to extract contents from.
:return: The contents.
"""
reader = PdfReader(pdf_file)
start, end = page_range # set start and end per the range (user-specified values)
print(f"starting at {start}, ending {end}")
text = ''
for page_num in range(start - 1, end):
page = reader.pages[page_num]
text += page.extract_text()
return text
def validate_page_range(pdf_file: st.runtime.uploaded_file_manager.UploadedFile,
start:int, end:int) -> tuple[int, int]:
n_pages = len(PdfReader(pdf_file).pages)
#start, end = st.session_state["page_range_slider"]
start = max(1, start)
end = min(n_pages, end)
if start >= end:
start = 1
return (start, end)
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