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from re import sub
from urllib.parse import unquote, quote, urlsplit
class Urn(object):
separate = "/"
def __init__(self, path, directory=False):
self._path = quote(path)
expressions = (r"/\.+/", "/+")
for expression in expressions:
self._path = sub(expression, Urn.separate, self._path)
if not self._path.startswith(Urn.separate):
self._path = "{begin}{end}".format(begin=Urn.separate, end=self._path)
if directory and not self._path.endswith(Urn.separate):
self._path = "{begin}{end}".format(begin=self._path, end=Urn.separate)
def __str__(self):
return self.path()
def path(self):
return unquote(self._path)
def quote(self):
return self._path
def filename(self):
path_split = self._path.split(Urn.separate)
name = path_split[-2] + Urn.separate if path_split[-1] == '' else path_split[-1]
return unquote(name)
def parent(self):
path_split = self._path.split(Urn.separate)
nesting_level = self.nesting_level()
parent_path_split = path_split[:nesting_level]
parent = self.separate.join(parent_path_split) if nesting_level != 1 else Urn.separate
if not parent.endswith(Urn.separate):
return unquote(parent + Urn.separate)
else:
return unquote(parent)
def nesting_level(self):
return self._path.count(Urn.separate, 0, -1)
def is_dir(self):
return self._path[-1] == Urn.separate
@staticmethod
def normalize_path(path):
result = sub('/{2,}', '/', path)
return result if len(result) < 1 or result[-1] != Urn.separate else result[:-1]
@staticmethod
def compare_path(path_a, href):
unqouted_path = Urn.separate + unquote(urlsplit(href).path)
return Urn.normalize_path(path_a) == Urn.normalize_path(unqouted_path)
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