mirror of https://github.com/papermerge/mglib
refactoring, work in progress...
Eugen Ciur
parent
d0af1087af
commit
31330c0011
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@ -0,0 +1,268 @@
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import logging
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import shutil
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from os import listdir
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from os.path import isdir, join
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from pmworker.pdftk import make_sure_path_exists
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from mglib.path import (DocumentPath, PagePath)
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from mglib.step import Steps
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"""
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OCR operations are per page. Cut/Paste/Delete/Reorder are per page as well.
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So it does not make sense to rerun such a heavy operation as OCR again, instead
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we can do some magic tricks (copy them from one location to another)
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on already extracted txt and hocr files.
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OcrMigrate class takes care of this sort of txt/hocr files moves.
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"""
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logger = logging.getLogger(__name__)
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def get_pagecount(doc_ep):
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"""
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Returns total number of pages for this endpoint.
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Total number of pages = number of page_xy.txt files
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in pages_dirname folder.
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"""
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doc_ep_pointing_to_results = DocumentPath.copy_from(
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doc_ep, aux_dir="results"
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)
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pages_dir = doc_ep_pointing_to_results.pages_dirname
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only_dirs = [
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fi for fi in listdir(pages_dir) if isdir(join(pages_dir, fi))
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]
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return len(only_dirs)
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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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def copy_page(src_page_ep, dst_page_ep):
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err_msg = "copy_page accepts only PageEp instances"
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for inst in [src_page_ep, dst_page_ep]:
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if not isinstance(inst, PagePath):
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raise ValueError(err_msg)
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# copy .txt file
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if src_page_ep.txt_exists():
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make_sure_path_exists(dst_page_ep.txt_url())
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src_txt = src_page_ep.txt_url()
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dst_txt = dst_page_ep.txt_url()
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logger.debug(f"copy src_txt={src_txt} dst_txt={dst_txt}")
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shutil.copy(src_txt, dst_txt)
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else:
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logger.debug(
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f"txt does not exits {src_page_ep.txt_exists()}"
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)
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# hocr
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if src_page_ep.hocr_exists():
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make_sure_path_exists(dst_page_ep.hocr_url())
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src_hocr = src_page_ep.hocr_url()
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dst_hocr = dst_page_ep.hocr_url()
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logger.debug(f"copy src_hocr={src_hocr} dst_hocr={dst_hocr}")
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shutil.copy(src_hocr, dst_hocr)
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else:
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logger.debug(
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f"hocr does not exits {src_page_ep.hocr_exists()}"
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)
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if src_page_ep.img_exists():
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make_sure_path_exists(dst_page_ep.img_url())
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src_img = src_page_ep.img_url()
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dst_img = dst_page_ep.img_url()
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logger.debug(f"copy src_img={src_img} dst_img={dst_img}")
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shutil.copy(src_img, dst_img)
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else:
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logger.debug(
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f"img does not exits {src_page_ep.img_exists()}"
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)
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def migrate_cutted_pages(dest_ep, src_doc_ep_list):
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"""
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dest_ep = destination document endpoint
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src_doc_ep_list = a list of following format:
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[
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{
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'doc_ep': doc_ep,
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'page_nums': [page_num_1, page_num_2, page_num_3]
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},
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{
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'doc_ep': doc_ep,
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'page_nums': [page_num_1, page_num_2, page_num_3]
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},
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...
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]
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with a list of source document with copied pages.
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"""
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dest_page_num = 1
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dest_page_count = sum([
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len(item['page_nums']) for item in src_doc_ep_list
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])
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for item in src_doc_ep_list:
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src_ep = item['doc_ep']
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for page_num in item['page_nums']:
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for step in Steps():
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src_page_ep = PageEp(
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document_ep=src_ep,
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page_num=int(page_num),
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step=step,
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page_count=get_pagecount(src_ep)
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)
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dst_page_ep = PageEp(
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document_ep=dest_ep,
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page_num=dest_page_num,
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step=step,
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page_count=dest_page_count
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)
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logger.debug(f"src={src_page_ep} dst={dst_page_ep}")
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copy_page(
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src_page_ep=src_page_ep,
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dst_page_ep=dst_page_ep
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)
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dest_page_num += 1
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class OcrMigrate:
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"""
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Insead of running again OCR operation on changed document AGAIN
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(e.g. after pages 2 and 3 were deleted)
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text files which are result of first (and only!) OCR are moved
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(moved = migrated) inside new version's folder.
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Basically migrate/move files instead of rerunning OCR operation.
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For each affected page (page_x), following files will need to be migrated:
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* <version>/pages/page_x.txt
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* <version>/pages/page_x/50/*.hocr
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* <version>/pages/page_x/75/*.hocr
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* <version>/pages/page_x/100/*.hocr
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* <version>/pages/page_x/125/*.hocr
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from <old_version> to <new_version>
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Which pages are affected depends on the operation.
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"""
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def __init__(self, src_ep, dst_ep):
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# Both endpoints shoud be instance of DocumentEp
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for inst in [src_ep, dst_ep]:
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if not isinstance(inst, DocumentEp):
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raise ValueError(
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"OcrMigrate args must be DocumentEp instances"
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)
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self.src_ep = src_ep
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self.dst_ep = dst_ep
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def migrate_delete(self, deleted_pages):
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page_count = get_pagecount(self.src_ep)
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if len(deleted_pages) > page_count:
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logger.error(
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f"deleted_pages({deleted_pages}) > page_count({page_count})"
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)
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return
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assigns = get_assigns_after_delete(
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total_pages=page_count,
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deleted_pages=deleted_pages
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)
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for a in assigns:
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for step in Steps():
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src_page_ep = PageEp(
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document_ep=self.src_ep,
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page_num=a[1],
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step=step,
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page_count=page_count
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)
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dst_page_ep = PageEp(
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document_ep=self.dst_ep,
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page_num=a[0],
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step=step,
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page_count=page_count - len(deleted_pages)
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)
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copy_page(
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src_page_ep=src_page_ep,
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dst_page_ep=dst_page_ep
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)
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def migrate_reorder(self, new_order):
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"""
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Similar to migrate_delete, with minor tweaks.
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"""
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page_count = get_pagecount(self.src_ep)
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if len(new_order) > page_count:
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logger.error(
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f"deleted_pages({new_order}) > page_count({page_count})"
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)
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return
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for item in new_order:
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for step in Steps():
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src_page_ep = PageEp(
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document_ep=self.src_ep,
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page_num=int(item['page_num']),
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step=step,
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page_count=len(new_order)
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)
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dst_page_ep = PageEp(
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document_ep=self.dst_ep,
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page_num=int(item['page_order']),
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step=step,
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page_count=len(new_order)
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)
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copy_page(
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src_page_ep=src_page_ep,
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dst_page_ep=dst_page_ep
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)
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@ -102,7 +102,7 @@ class PagePath:
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def __init__(
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self,
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document_ep,
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document_path,
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page_num,
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page_count,
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step=None
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@ -111,15 +111,15 @@ class PagePath:
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msg_err = f"PagePath.page_num must be an int. Got {page_num}."
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raise ValueError(msg_err)
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self.document_ep = document_ep
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self.document_path = document_path
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self.results_document_ep = DocumentPath.copy_from(
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document_ep,
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document_path,
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aux_dir=AUX_DIR_RESULTS
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)
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self.page_count = page_count
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self.page_num = page_num
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self.step = step
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self.pages = self.document_ep.pages
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self.pages = self.document_path.pages
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@property
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def ppmroot(self):
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@ -133,7 +133,7 @@ class PagePath:
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@property
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def pages_dirname(self):
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return self.document_ep.pages_dirname
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return self.document_path.pages_dirname
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@property
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def path(self):
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@ -0,0 +1,25 @@
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import logging
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import subprocess
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logger = logging.getLogger(__name__)
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def run(cmd):
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logger.debug(
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f"Run:{'|'.join(cmd)}"
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)
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ret = subprocess.run(
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cmd,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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encoding="utf-8"
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)
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if ret.returncode != 0:
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logger.error((
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f"returncode={ret.returncode}"
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f" stdout={ret.stdout}"
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f" stderr={ret.stderr}"
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))
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@ -0,0 +1,113 @@
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import os
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import logging
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from mglib.runcmd import run
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logger = logging.getLogger(__name__)
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def extract_img(page_path, media_root):
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local_abspath = os.path.join(
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media_root,
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page_path.document_path.url()
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)
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logger.debug(f"Extracing image for {page_path.img_url()}")
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ppmroot = os.path.join(media_root, page_path.ppmroot)
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ppmroot_dirname = os.path.dirname(ppmroot)
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page_num = page_path.page_num
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width = page_path.step.width
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if not os.path.exists(ppmroot_dirname):
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logger.debug(f"PPMROOT {ppmroot_dirname} does not exists. Creating.")
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os.makedirs(
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ppmroot_dirname, exist_ok=True
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)
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else:
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logger.debug(f"PPMROOT {ppmroot_dirname} already exists.")
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cmd = (
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"pdftoppm",
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"-jpeg",
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"-f",
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str(page_num),
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"-l", # generate only one page
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str(page_num),
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"-scale-to-x",
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str(width),
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"-scale-to-y",
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"-1", # it will adjust height according to img ratio
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local_abspath,
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# output directory path,
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ppmroot
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)
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run(cmd)
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def extract_hocr(page_url, lang, media_root):
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page_abspath = os.path.join(
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media_root,
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page_url.img_url()
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)
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hocr_root, hocr_ext = os.path.splitext(
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os.path.join(media_root, page_url.hocr_url())
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)
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cmd = (
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"tesseract",
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"-l",
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lang,
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page_abspath,
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hocr_root,
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"hocr"
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)
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run(cmd)
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def extract_txt(page_url, lang, media_root):
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page_abspath = os.path.join(
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media_root,
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page_url.img_url()
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)
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txt_root, txt_ext = os.path.splitext(
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os.path.join(
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media_root, page_url.txt_url()
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)
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)
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cmd = (
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"tesseract",
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"-l",
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lang,
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page_abspath,
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txt_root
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)
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run(cmd)
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#def text_from_pdf(filepath, lang, dry_run=False):
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#
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# # suffix .tiff in file name is required by conver utility, otherwise
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# # it won't convert to tiff format!
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# tiff = tempfile.NamedTemporaryFile(suffix=".tiff")
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# conv = convert.Convert(dry_run=dry_run)
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# conv(filepath=filepath, fout=tiff)
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# try:
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# tsact = tesseract.Tesseract()
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# text = tsact(filepath=tiff.name, lang=lang)
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# except subprocess.CalledProcessError as e:
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# print(e)
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# print(e.stderr)
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# return
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#
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# return text
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#
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#
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#def text_from_image(filepath, lang, dry_run=False):
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#
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# tsact = tesseract.Tesseract(dry_run=dry_run)
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# text = tsact(filepath=filepath, lang=lang)
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#
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# return text
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#
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@ -21,11 +21,14 @@ class Storage:
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def location(self):
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return self._location
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def path(self, _path):
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def abspath(self, _path):
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return os.path.join(
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self.location, _path
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)
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def path(self, _path):
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return self.abspath(_path)
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def delete_document(self, doc_path):
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"""
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Receives a mglib.path.DocumentPath instance
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@ -56,6 +59,29 @@ class Storage:
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if os.path.exists(abs_dirname_results):
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os.rmdir(abs_dirname_results)
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def copy_doc(self, src, dst):
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"""
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copy given file src file path to destination
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as absolute doc_path
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"""
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dirname = os.path.dirname(
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self.abspath(dst)
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)
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if not os.path.exists(
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dirname
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):
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os.makedirs(
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dirname, exist_ok=True
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)
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logger.debug(
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f"copy_doc: {src} to {dst}"
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)
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shutil.copyfile(
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src,
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self.abspath(dst)
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)
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def exists(self, _path):
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return os.path.exists(
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self.path(_path)
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