text: #!/usr/bin/python
  r"""
  Script to delete files that are also present on Wikimedia Commons.
  
  Do not run this script on Wikimedia Commons itself. It works based on
  a given array of templates defined below.
  
  Files are downloaded and compared. If the files match, it can be deleted on
  the source wiki. If multiple versions of the file exist, the script will not
  delete. If the SHA1 comparison is not equal, the script will not delete.
  
  A sysop rights on the local wiki is required if you want all features of
  this script to work properly.
  
  This script understands various command-line arguments:
  
      -always         run automatically, do not ask any questions. All files
                      that qualify for deletion are deleted. Reduced screen
                      output.
  
      -replace        replace links if the files are equal and the file names
                      differ
  
      -replacealways  replace links if the files are equal and the file names
                      differ without asking for confirmation
  
      -replaceloose   Do loose replacements. This will replace all occurrences
                      of the name of the file (and not just explicit file
                      syntax).  This should work to catch all instances of the
                      file, including where it is used as a template parameter
                      or in galleries. However, it can also make more mistakes.
  
      -replaceonly    Use this if you do not have a local sysop rights, but do
                      wish to replace links from the NowCommons template.
  
  Example
  -------
  
      python pwb.py nowcommons -replaceonly -replaceloose -replacealways -replace
  
  Todo
  ----
  Please fix these if you are capable and motivated:
  
  - if a file marked nowcommons is not present on Wikimedia Commons, the bot
    will exit.
  """
  #
  # (C) Pywikibot team, 2006-2021
  #
  # Distributed under the terms of the MIT license.
  #
  import sys
  from itertools import chain
  
  import pywikibot
  from pywikibot import Bot, i18n
  from pywikibot import pagegenerators as pg
  from pywikibot.exceptions import IsRedirectPageError, NoPageError
  from pywikibot.tools import filter_unique
  from pywikibot.tools.formatter import color_format
  from scripts.image import ImageRobot as ImageBot
  
  
  nowcommons = {
      '_default': [
          'NowCommons'
      ],
      'ar': [
          'الآن كومنز',
          'الآن كومونز',
      ],
      'de': [
          'NowCommons',
          'NC',
          'Nowcommons',
          'Now Commons',
          'NowCommons/Mängel',
          'NC/M',
      ],
      'en': [
          'NowCommons',
          'Ncd',
      ],
      'eo': [
          'Nun en komunejo',
          'NowCommons',
      ],
      'fa': [
          'موجود در انبار',
          'NowCommons',
      ],
      'fr': [
          'Image sur Commons',
          'DoublonCommons',
          'Déjà sur Commons',
          'Maintenant sur commons',
          'Désormais sur Commons',
          'NC',
          'NowCommons',
          'Nowcommons',
          'Sharedupload',
          'Sur Commons',
          'Sur Commons2',
      ],
      'he': [
          'גם בוויקישיתוף'
      ],
      'hu': [
          'Azonnali-commons',
          'NowCommons',
          'Nowcommons',
          'NC'
      ],
      'ia': [
          'OraInCommons'
      ],
      'it': [
          'NowCommons',
      ],
      'ja': [
          'NowCommons',
      ],
      'ko': [
          '공용중복',
          '공용 중복',
          'NowCommons',
          'Now Commons',
          'Nowcommons',
      ],
      'nds-nl': [
          'NoenCommons',
          'NowCommons',
      ],
      'nl': [
          'NuCommons',
          'Nucommons',
          'NowCommons',
          'Nowcommons',
          'NCT',
          'Nct',
      ],
      'ro': [
          'NowCommons'
      ],
      'ru': [
          'NowCommons',
          'NCT',
          'Nowcommons',
          'Now Commons',
          'Db-commons',
          'Перенесено на Викисклад',
          'На Викискладе',
      ],
      'sr': [
          'NowCommons',
          'На Остави',
      ],
      'zh': [
          'NowCommons',
          'Nowcommons',
          'NCT',
      ],
  }
  
  namespace_in_template = [
      'en',
      'ia',
      'it',
      'ja',
      'ko',
      'lt',
      'ro',
      'zh',
  ]
  
  
  class NowCommonsDeleteBot(Bot):
  
      """Bot to delete migrated files."""
  
      def __init__(self, **kwargs):
          """Initializer."""
          self.available_options.update({
              'replace': False,
              'replacealways': False,
              'replaceloose': False,
              'replaceonly': False,
          })
          super().__init__(**kwargs)
  
          self.site = pywikibot.Site()
          if not self.site.has_image_repository:
              sys.exit('There must be a file repository to run this script')
          self.commons = self.site.image_repository()
          if self.site == self.commons:
              sys.exit(
                  'You cannot run this bot on file repository like Commons.')
          self.summary = i18n.twtranslate(self.site,
                                          'imagetransfer-nowcommons_notice')
  
      def nc_templates_list(self):
          """Return nowcommons templates."""
          if self.site.lang in nowcommons:
              return nowcommons[self.site.lang]
          return nowcommons['_default']
  
      @property
      def nc_templates(self):
          """A set of now commons template Page instances."""
          if not hasattr(self, '_nc_templates'):
              self._nc_templates = {pywikibot.Page(self.site, title, ns=10)
                                    for title in self.nc_templates_list()}
          return self._nc_templates
  
      @property
      def generator(self):
          """Generator method."""
          gens = (t.getReferences(follow_redirects=True, namespaces=[6],
                                  only_template_inclusion=True)
                  for t in self.nc_templates)
          gen = chain(*gens)
          gen = filter_unique(gen, key=lambda p: '{}:{}:{}'.format(*p._cmpkey()))
          gen = pg.PreloadingGenerator(gen)
          return gen
  
      def find_file_on_commons(self, local_file_page):
          """Find filename on Commons."""
          for template_name, params in local_file_page.templatesWithParams():
              if template_name not in self.nc_templates:
                  continue
  
              if not params:
                  file_on_commons = local_file_page.title(with_ns=False)
              elif self.site.lang in namespace_in_template:
                  skip = False
                  file_on_commons = None
                  for par in params:
                      val = par.split('=')
                      if len(val) == 1 and not skip:
                          file_on_commons = par[par.find(':') + 1:]
                          break
                      if val[0].strip() == '1':
                          file_on_commons = \
                              val[1].strip()[val[1].strip().find(':') + 1:]
                          break
                      skip = True
                  if not file_on_commons:
                      file_on_commons = local_file_page.title(with_ns=False)
              else:
                  val = params[0].split('=')
                  if len(val) == 1:
                      file_on_commons = params[0].strip()
                  else:
                      file_on_commons = val[1].strip()
              return file_on_commons
  
      def run(self):
          """Run the bot."""
          commons = self.commons
          comment = self.summary
  
          for page in self.generator:
              self.current_page = page
              try:
                  local_file_page = pywikibot.FilePage(self.site, page.title())
                  if local_file_page.file_is_shared():
                      pywikibot.output('File is already on Commons.')
                      continue
                  sha1 = local_file_page.latest_file_info.sha1
                  file_on_commons = self.find_file_on_commons(local_file_page)
                  if not file_on_commons:
                      pywikibot.output('NowCommons template not found.')
                      continue
                  commons_file_page = pywikibot.FilePage(commons, 'File:'
                                                         + file_on_commons)
                  if (local_file_page.title(with_ns=False)
                          != commons_file_page.title(with_ns=False)):
                      using_pages = list(local_file_page.using_pages())
                      if using_pages and using_pages != [local_file_page]:
                          pywikibot.output(color_format(
                              '"{lightred}{0}{default}" '
                              'is still used in {1} pages.',
                              local_file_page.title(with_ns=False),
                              len(using_pages)))
                          if self.opt.replace:
                              pywikibot.output(color_format(
                                  'Replacing "{lightred}{0}{default}" by '
                                  '"{lightgreen}{1}{default}\".',
                                  local_file_page.title(with_ns=False),
                                  commons_file_page.title(with_ns=False)))
                              bot = ImageBot(
                                  pg.FileLinksGenerator(local_file_page),
                                  local_file_page.title(with_ns=False),
                                  commons_file_page.title(with_ns=False),
                                  always=self.opt.replacealways,
                                  loose=self.opt.replaceloose)
                              bot.run()
                              # If the image is used with the urlname the
                              # previous function won't work
                              is_used = bool(list(pywikibot.FilePage(
                                  self.site,
                                  page.title()).using_pages(total=1)))
                              if is_used and self.opt.replaceloose:
                                  bot = ImageBot(
                                      pg.FileLinksGenerator(local_file_page),
                                      local_file_page.title(with_ns=False,
                                                            as_url=True),
                                      commons_file_page.title(with_ns=False),
                                      always=self.opt.replacealways,
                                      loose=self.opt.replaceloose)
                                  bot.run()
                              # refresh because we want the updated list
                              using_pages = len(list(pywikibot.FilePage(
                                  self.site, page.title()).using_pages()))
  
                          else:
                              pywikibot.output('Please change them manually.')
                          continue
                      pywikibot.output(color_format(
                          'No page is using "{lightgreen}{0}{default}" '
                          'anymore.',
                          local_file_page.title(with_ns=False)))
                  commons_text = commons_file_page.get()
                  if not self.opt.replaceonly:
                      if sha1 == commons_file_page.latest_file_info.sha1:
                          pywikibot.output(
                              'The file is identical to the one on Commons.')
                          if len(local_file_page.get_file_history()) > 1:
                              pywikibot.output(
                                  'This file has a version history. Please '
                                  'delete it manually after making sure that '
                                  'the old versions are not worth keeping.')
                              continue
                          if self.opt.always is False:
                              format_str = color_format(
                                  '\n\n>>>> Description on {lightpurple}%s'
                                  '{default} <<<<\n')
                              pywikibot.output(format_str % page.title())
                              pywikibot.output(local_file_page.get())
                              pywikibot.output(format_str %
                                               commons_file_page.title())
                              pywikibot.output(commons_text)
                              if pywikibot.input_yn(
                                      'Does the description on Commons contain '
                                      'all required source and license\n'
                                      'information?',
                                      default=False, automatic_quit=False):
                                  local_file_page.delete(
                                      '{} [[:commons:File:{}]]'
                                      .format(comment, file_on_commons),
                                      prompt=False)
                          else:
                              local_file_page.delete(
                                  comment + ' [[:commons:File:{}]]'
                                            .format(file_on_commons),
                                            prompt=False)
                      else:
                          pywikibot.output('The file is not identical to '
                                           'the one on Commons.')
              except (NoPageError, IsRedirectPageError) as e:
                  pywikibot.output(str(e[0]))
                  continue
              else:
                  self._treat_counter += 1
          if not self._treat_counter:
              pywikibot.output('No transcluded files found for {}.'
                               .format(self.nc_templates_list()[0]))
          self.exit()
  
  
  def main(*args):
      """
      Process command line arguments and invoke bot.
  
      If args is an empty list, sys.argv is used.
  
      @param args: command line arguments
      @type args: str
      """
      options = {}
  
      for arg in pywikibot.handle_args(args):
          if arg == '-replacealways':
              options['replace'] = True
              options['replacealways'] = True
          elif arg.startswith('-'):
              if arg[1:] in ('always', 'replace', 'replaceloose', 'replaceonly'):
                  options[arg[1:]] = True
  
      bot = NowCommonsDeleteBot(**options)
      bot.run()
  
  
  if __name__ == '__main__':
      main()
  