from scanner import StringScanner, StringRegexp import re def _next_token(): return StringRegexp('[^\s]+') def _separators(): return StringRegexp('[\s&]+') def _compile_tag(compiled, token): tag = token.split(":").pop() if token[0] == "-": compiled["not_tags"].append(tag) else: compiled["tags"].append(tag) return compiled class SearchQuery: @staticmethod def compile(query): compiled = {"tags": [], "not_tags": [], "general": []} scanner = StringScanner(query.encode('utf8').replace("\"", "")) first_token = True while not scanner.is_eos: token = scanner.scan(_next_token()) if not token: scanner.skip(_separators()) continue if ":" in token: compiled = _compile_tag(compiled, token) elif first_token: compiled["general"].append(token) if not first_token: first_token = True compiled["general"] = ' '.join(compiled["general"]) return SearchQuery(compiled) def __init__(self, compiled): self.compiled = compiled def test(self, mail): if 'all' in self.compiled.get('tags'): return True if set(self.compiled.get('not_tags')).intersection(set(mail.tags)): return False if set(self.compiled.get('tags')).intersection(set(mail.tags)): return True if self.compiled.get('general'): search_terms = re.compile( self.compiled['general'], flags=re.IGNORECASE) if search_terms.search(mail.subject+' '+mail.body): return True if not [v for v in self.compiled.values() if v]: return True return False