cleanres.py

import re
import os
import argparse
import sys
import errno
import optparse
import sqlite3
import uuid

import mimetypes
import email
import email.utils
from email.message import EmailMessage
from email.parser import BytesParser, Parser
from email.policy import default

from datetime import datetime, timezone
#from pytz import timezone

import hashlib
import shutil

import notesdb
import constants
import common

#
# MIT License
#
# https://opensource.org/licenses/MIT
#
# Copyright 2020 Rene Sugar
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

#
# Description:
#
# This program removes unused files from the resources directory.
#

global __name__, __author__, __email__, __version__, __license__
__program_name__ = 'cleanres'
__author__ = 'Rene Sugar'
__email__ = 'rene.sugar@gmail.com'
__version__ = '1.00'
__license__ = 'MIT License (https://opensource.org/licenses/MIT)'
__website__ = 'https://github.com/renesugar'
__db_schema_version__ = '1'
__db_schema_min_version__ = '1'

def filelist(dir):
  allfiles = []
  for path, subdirs, files in os.walk(dir):
    files = [os.path.join(path,x) for x in files]
    # "[:]" alters the list of subdirectories walked by os.walk
    # https://stackoverflow.com/questions/10620737/efficiently-removing-subdirectories-in-dirnames-from-os-walk
    subdirs[:] = [os.path.join(path,x) for x in subdirs]
    allfiles.extend(files)
    for x in subdirs:
      allfiles.extend(filelist(x))
  return allfiles

def _get_option_parser():
    parser = optparse.OptionParser('%prog [options]',
                                   version='%prog ' + __version__)
    parser.add_option('', "--email",
                      action="store", dest="email_address", default=None,
                      help="Email address")
    parser.add_option("", "--input",
                      action="store", dest="input_path", default=[],
                      help="Path to input SQLite directory")
    return parser

def main(args):
  parser = _get_option_parser()
  (options, args) = parser.parse_args(args)

  email_address = ''
  if hasattr(options, 'email_address') and options.email_address:
    email_address = options.email_address
    if common.check_email_address(email_address) == False:
      # Check if email address is valid
      common.error("email address '%s' is not valid." % (email_address,))
  else:
    common.error("email address not specified.")

  inputPath = ''

  if hasattr(options, 'input_path') and options.input_path:
    inputPath = os.path.abspath(os.path.expanduser(options.input_path))
    if os.path.isdir(inputPath) == False:
      # Check if input directory exists
      common.error("input path '%s' does not exist." % (inputPath,))
  else:
    common.error("input path not specified.")

  inputResourcesPath = os.path.join(inputPath, 'resources')

  if os.path.isdir(inputResourcesPath) == False:
    # Check if input resources directory exists
    common.error("input resources path '%s' does not exist." % (inputResourcesPath,))

  notesdbfile = os.path.join(inputPath, 'notesdb.sqlite')

  new_database = (not os.path.isfile(notesdbfile))

  sqlconn = sqlite3.connect(notesdbfile,
    detect_types=sqlite3.PARSE_DECLTYPES)
  sqlconn.row_factory = sqlite3.Row
  sqlcur = sqlconn.cursor()

  if (new_database):
    common.error("database not found")

  db_settings = notesdb.get_db_settings(sqlcur, __db_schema_version__)
  notesdb.check_db_settings(db_settings, '%prog', __version__, __db_schema_min_version__, __db_schema_version__)

  files = filelist(inputResourcesPath)

  # Remove unused resource files
  
  for filepath in files:

    pathname, filename = os.path.split(filepath)

    resource_id, file_extension = os.path.splitext(filename)

    query =  "SELECT note_id FROM notes WHERE apple_attachment_path LIKE '%" + resource_id
    query += "%' OR note_data LIKE '%(:/" + resource_id + ")%';"

    sqlcur.execute(query)
  
    result = sqlcur.fetchone()

    if result is None:
      # delete file
      print("deleting '%s'..." % (filepath,))
      if os.path.isfile(filepath):
        os.remove(filepath)
  sqlconn.commit()

if __name__ == "__main__":
  main(sys.argv[1:])