import os

class RepotypeBase:

  def __init__(self, name):

    self.name = name

    self.server = None

    self.config = None

    self.path = None

  def check_config(self, server, config):

    config['internalurl'] = str(config['internalurl'] or '')

    while config['internalurl'][-1] == '/':

      del config['internalurl'][-1]

    assert config['internalurl']

    config['path'] = server.fixpath(config['path'], root = True)

  def configure(self, server, config):

    self.server = server

    self.config = config

    self.check_config(self.server, self.config)

    self.internalurl = config['internalurl']

    self.path = config['path']

  def parentdir(self, path):

    assert type(path) is str

    assert path[0] == '/'

    assert path[-1] != '/'

    return '/'.join(path.split('/')[:-1])

  def mkdir(self, path):

    assert type(path) is str

    assert path[0] == '/'

    assert path[-1] != '/'

    os.makedirs(path, exist_ok = True)

  def gen_path(self, subpath):

    assert type(subpath) is str

    assert subpath[-1] != '/'

    return self.path + '/' + subpath

  def gen_internalurl(self, subpath):

    assert type(subpath) is str

    assert subpath[-1] != '/'

    return self.internalurl + '/' + subpath

  def iswriteaccess(self, request, path):

    return True

  def create(self, subpath):

    raise Exception()

  def delete(self, subpath):

    raise Exception()