90 lines
2.3 KiB
Python
90 lines
2.3 KiB
Python
"""Backend for SyncTech Backup & Restore.
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[SyncTech Backup & Restore](https://www.synctech.com.au/sms-backup-restore/)
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for Android is a free app for backing up your SMS and MMS messages. It uses an
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XML format as backup format, which this backend reads and converts to the
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standardized Message format.
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"""
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import datetime
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import logging
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from collections.abc import Iterator
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from pathlib import Path
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import bs4
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from .data import MYSELF, Message
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logger = logging.getLogger(__name__)
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def is_named_number(num: str) -> str:
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try:
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int(num.removeprefix('+').replace(' ', ''))
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return False
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except ValueError:
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return True
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def normalize_phone_number(num: str) -> str:
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if is_named_number(num):
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return num
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num = num.replace(' ', '')
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if num.startswith('00'):
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num = '+' + num.removeprefix('00')
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if len(num) == 8:
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num = '+45' + num
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elif len(num) >= 10 and num[0] != '+':
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num = '+' + num
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return num
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def sms_soup_to_message(soup: bs4.BeautifulSoup) -> Message:
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# TODO: Require myself
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sent_at = datetime.datetime.fromtimestamp(int(soup['date']) / 1000)
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phone_num = normalize_phone_number(soup['address'])
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if is_named_number(phone_num):
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contact_name = phone_num
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phone_num = None
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else:
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contact_name = soup.get('contact_name') or phone_num
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if contact_name == '(Unknown)':
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contact_name = None
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if soup['type'] == '2':
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sender = MYSELF
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else:
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sender = contact_name or phone_num
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text = soup['body']
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chat_id_parts = ['SMS', contact_name or phone_num]
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chat_id = ' '.join(p for p in chat_id_parts if p)
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return Message(sent_at, sender, text, chat_id=chat_id)
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def select_newest_file_in_dir(path: Path) -> Path:
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return max(
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(p for p in path.iterdir() if p.suffix == '.xml' and 'sms' in p.name),
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key=lambda p: p.stat().st_atime_ns,
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)
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def parse_messages_in_backup_xml_file(path: Path) -> Iterator[Message]:
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if path.is_dir():
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logger.info('%s is a dir. Finding newest backup in directory', path)
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path = select_newest_file_in_dir(path)
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logger.info('Found: %s', path)
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logger.info('Parsing %s', path)
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with open(path) as f:
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soup = bs4.BeautifulSoup(f, 'lxml-xml')
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for sms in soup.find_all('sms'):
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yield sms_soup_to_message(sms)
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del sms
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