#!/usr/bin/env python3
import argparse
import os.path
import re
import zipfile
from typing import Any, Dict, List, Optional, Tuple
import epub_meta
parser = argparse.ArgumentParser(description='Grep through EPub book')
parser.add_argument('pattern')
parser.add_argument('filename')
parser.add_argument('-i', '--ignore-case',
action='store_true',
help="make search case insensitive")
args = parser.parse_args()
search_flags = 0
if args.ignore_case:
search_flags |= re.I
def get_chapter_title(mdata:List[Dict[str, Any]], fname:str) -> Optional[Tuple[str, int]]:
found_list = [(x['title'], x['index']) for x in mdata if x['src'] == fname]
if len(found_list) > 0:
chap_title = found_list[0][0].strip(' \t.0123456789')
return chap_title, found_list[0][1]
else:
return ('Unknown', 0)
def grep_book(filename:str, pattern:str, flags):
sought_RE = re.compile(pattern, flags)
metadata = epub_meta.get_epub_metadata(filename)
book = zipfile.ZipFile(filename)
for zif in book.infolist():
with book.open(zif) as inf:
printed_title = False
for line in inf:
decoded_line = line.decode()
if sought_RE.search(decoded_line):
if not printed_title:
chap_info = get_chapter_title(metadata.toc,
zif.filename)
print("{}. {}:\n".format(chap_info[1], chap_info[0]))
printed_title = True
print(decoded_line)
assert os.path.isfile(args.filename), "{} is not EPub file.".format(args.filename)
book_fname = os.path.realpath(args.filename)
grep_book(book_fname, args.pattern, search_flags)
