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# vim: fileencoding=utf-8
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#
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from .base_format import Format
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from collections import OrderedDict
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from pyparsing import Word, Literal, alphanums, printables, originalTextFor,\
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OneOrMore, ParseException, restOfLine, Group, Optional,\
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Regex
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class ProcmailFormat(Format):
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FORMAT = 'procmail'
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EXECUTABLE = False
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_initialized = False
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comment_symbol = '#'
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def __new__(cls, *args, **kwargs):
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if not cls._initialized:
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cls._initialize_parser()
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return super().__new__(cls)
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def __init__(self, document_text: str,
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template_path,
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ignore_comments=False,
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join_before=False,
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add_header=False,
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already_changed=False,
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**kwargs):
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processing_methods = [self._parse_comment_line,
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self._parse_parameter_line,
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self._parse_to_delete_line]
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super().__init__(processing_methods)
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self._ignore_comments = ignore_comments
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self._comments_processing = True
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self._join_before = join_before
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self._last_comments_list = []
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if add_header and not ignore_comments:
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self.header, document_text = self._get_header_and_document_text(
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document_text,
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template_path,
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already_changed=already_changed)
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else:
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self.header = ''
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document_text = document_text.strip()
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if document_text == '':
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self._document_dictionary = OrderedDict()
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else:
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document_lines = self._get_list_of_logic_lines(document_text)
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self._lines_to_dictionary(document_lines)
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@classmethod
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def _initialize_parser(cls):
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'''Метод для инициализации парсеров.'''
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parameter_name = Word(alphanums+'_.')
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parameter_value = originalTextFor(OneOrMore(Word(printables)))
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action_symbols = (Literal('!') | Literal('-'))
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cls._parameter_line = (Group(Optional(action_symbols,
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default='')('action')
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+ parameter_name('Name')
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)('parameter_name')
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+ Literal('=').suppress()
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+ parameter_value('parameter_value'))
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cls._parameter_to_delete = (Group(action_symbols('action')
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+ parameter_name('Name')
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)('parameter_name')
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+ restOfLine.suppress())
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cls._comment_line = originalTextFor(Literal(cls.comment_symbol)
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+ Regex(r'.*'))('comment')
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cls._initialized = True
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def _parse_parameter_line(self, line):
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'''Метод для парсинга строк содержащих параметр.'''
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try:
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parsing_result = self._parameter_line.parseString(line)
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self._match = True
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key_value = tuple(parsing_result.parameter_name.asList())
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parameter_value = parsing_result.parameter_value
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parameter_value = self._last_comments_list + [parameter_value]
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self._last_comments_list = []
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self._item_to_add = OrderedDict({key_value: parameter_value})
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self._ready_to_update = True
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except ParseException:
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return
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def _parse_to_delete_line(self, line):
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'''Метод для парсинга строк, подлежащих удалению, т.е. для которых
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указано имя параметра со знаком !, и опционально присутствует значение
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параметра.'''
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try:
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self._item_to_add = OrderedDict()
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parsing_result = self._parameter_to_delete.parseString(line)
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self._match = True
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if parsing_result.parameter_name.action == '-':
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return
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key_value = tuple(parsing_result.parameter_name.asList())
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parameter_value = self._last_comments_list
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self._last_comments_list = []
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self._item_to_add = OrderedDict({key_value: parameter_value})
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self._ready_to_update = True
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except ParseException:
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return
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def _parse_comment_line(self, line):
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'''Метод для парсинга строк содержащих комментарий.'''
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try:
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parsing_result = self._comment_line.parseString(line)
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self._match = True
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if not self._ignore_comments:
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self._last_comments_list.append(parsing_result.comment)
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except ParseException:
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return
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