mirror of https://github.com/papermerge/mglib
87 lines
2.1 KiB
Python
87 lines
2.1 KiB
Python
import os
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import logging
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logger = logging.getLogger(__name__)
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SAFE_EXTENSIONS = ['.txt', '.jpg', '.hocr', '.pdf']
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def get_bool(key, default="NO"):
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"""
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Returns True if environment variable named KEY is one of
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"yes", "y", "t", "true" (lowercase of uppercase)
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otherwise returns False
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"""
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env_var_value = os.getenv(key, default).lower()
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YES_VALUES = ("yes", "y", "1", "t", "true")
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if env_var_value in YES_VALUES:
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return True
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return False
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def safe_to_delete(place):
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if not os.path.exists(place):
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logging.warning(
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f"Trying to delete not exising folder"
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f" {place}"
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)
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return False
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for root, dirs, files in os.walk(place):
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for name in files:
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base, ext = os.path.splitext(name)
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if ext not in SAFE_EXTENSIONS:
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raise Exception("Trying to delete unsefe location")
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return True
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def get_assigns_after_delete(total_pages, deleted_pages):
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"""
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given total pages and a list of deleted pages - returns
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a list of assignations of pages:
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[new_version_page_num, old_version_page_num]
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Example 1:
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total_pages: 6
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deleted_pages: [1, 2]
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returns: [
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[(1, 3), (2, 4), (3, 5), (4, 6)]
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# page #1 gets info from prev page #3
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# page #2 ... #4
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...
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# page #4 ... #6
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]
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Example 2:
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total pages: 5
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deleted_pages [1, 5]
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returns: [
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[(1, 2), (2, 3), (3, 4)
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]
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Example 3:
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total pages: 5
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deleted_pages [2, 3]
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returns: [
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[(1, 1), (2, 4), (3, 5)
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# page #1 stays unaffected
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# page #2 gets the info from page number 4
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# page #3 gets info from page #5
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]
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"""
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if total_pages < len(deleted_pages):
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err_msg = f"total_pages < deleted_pages"
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raise ValueError(err_msg)
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# only numbers of pages which were not deleted
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pages = [
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page for page in list(range(1, total_pages + 1))
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if page not in deleted_pages
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]
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page_numbers = range(1, len(pages) + 1)
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return list(zip(page_numbers, pages))
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