mirror of https://github.com/morpheus65535/bazarr
65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
__author__ = 'Artur Barseghyan'
|
|
__copyright__ = '2013-2020 Artur Barseghyan'
|
|
__license__ = 'MPL-1.1 OR GPL-2.0-only OR LGPL-2.1-or-later'
|
|
__all__ = (
|
|
'Trie',
|
|
'TrieNode',
|
|
)
|
|
|
|
|
|
class TrieNode(object):
|
|
"""Class representing a single Trie node."""
|
|
|
|
__slots__ = ('children', 'exception', 'leaf', 'private')
|
|
|
|
def __init__(self):
|
|
self.children = None
|
|
self.exception = None
|
|
self.leaf = False
|
|
self.private = False
|
|
|
|
|
|
class Trie(object):
|
|
"""An adhoc Trie data structure to store tlds in reverse notation order."""
|
|
|
|
def __init__(self):
|
|
self.root = TrieNode()
|
|
self.__nodes = 0
|
|
|
|
def __len__(self):
|
|
return self.__nodes
|
|
|
|
def add(self, tld: str, private: bool = False) -> None:
|
|
node = self.root
|
|
|
|
# Iterating over the tld parts in reverse order
|
|
# for part in reversed(tld.split('.')):
|
|
tld_split = tld.split('.')
|
|
tld_split.reverse()
|
|
for part in tld_split:
|
|
|
|
if part.startswith('!'):
|
|
node.exception = part[1:]
|
|
break
|
|
|
|
# To save up some RAM, we initialize the children dict only
|
|
# when strictly necessary
|
|
if node.children is None:
|
|
node.children = {}
|
|
child = TrieNode()
|
|
else:
|
|
child = node.children.get(part)
|
|
if child is None:
|
|
child = TrieNode()
|
|
|
|
node.children[part] = child
|
|
|
|
node = child
|
|
|
|
node.leaf = True
|
|
|
|
if private:
|
|
node.private = True
|
|
|
|
self.__nodes += 1
|