PPT Copier

#!/usr/bin/python3

import datetime
import os
import re
import shutil

from pptx import Presentation  # requirements: python-pptx

FILE_PATTERN = r"ECL_Progress_Meeting_\d{8}_문준오.pptx$"
NEW_FILE_FORMAT = "ECL_Progress_Meeting_{}_문준오.pptx"
DURATAION_PATTERN = r"\d{4}[.]\d{2}.\d{2}-\d{4}[.]\d{2}.\d{2}"

def main():
    pattern = re.compile(FILE_PATTERN)

    so_far_latest = max(os.path.join(root, file)
            for root, dirs, files in os.walk(".")
            for file in files if pattern.search(os.path.join(root, file))
            )

    meeting_date = get_next_friday().strftime("%Y%m%d")

    new_filename = NEW_FILE_FORMAT.format(meeting_date)

    create_pptx_with_new_date(so_far_latest, new_filename)
    return


def get_next_friday(today=datetime.datetime.now()) -> datetime.datetime:
    FRIDAY = 4

    weekday: int = today.weekday()

    if weekday <= FRIDAY:
        friday = today + datetime.timedelta(days=FRIDAY - weekday)
    else:
        friday = today + datetime.timedelta(days=weekday - FRIDAY + 7)

    assert friday.weekday() == FRIDAY
    return friday


def create_pptx_with_new_date(src_name: str, dst_name: str):
    pattern = re.compile(DURATAION_PATTERN)

    prs = Presentation(src_name)

    cell = next(cell
            for slide in prs.slides
            for shape in slide.shapes if shape.has_table
            for cell in shape.table.iter_cells() if pattern.search(cell.text)
            )
    run = next(run
            for para in cell.text_frame.paragraphs
            for run in para.runs
            )
    run.text = replace_date()
    print(f"New date: {run.text}")

    prs.save(dst_name)
    return


def replace_date(today=datetime.datetime.now()) -> str:
    end_time = get_next_friday(today)
    start_time = end_time - datetime.timedelta(days=4)

    return f"""{start_time.strftime("%Y.%m.%d")}-{end_time.strftime("%Y.%m.%d")}"""


if __name__ == "__main__":
    main()