vcsserver/utils.py

# RhodeCode VCSServer provides access to different vcs backends via network.
# Copyright (C) 2014-2019 RhodeCode GmbH
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
import logging
import hashlib

log = logging.getLogger(__name__)


def safe_int(val, default=None):
    """
    Returns int() of val if val is not convertable to int use default
    instead

    :param val:
    :param default:
    """

    try:
        val = int(val)
    except (ValueError, TypeError):
        val = default

    return val


def safe_str(unicode_, to_encoding=None):
    """
    safe str function. Does few trick to turn unicode_ into string

    :param unicode_: unicode to encode
    :param to_encoding: encode to this type UTF8 default
    :rtype: str
    :returns: str object
    """
    to_encoding = to_encoding or ['utf8']
    # if it's not basestr cast to str
    if not isinstance(unicode_, basestring):
        return str(unicode_)

    if isinstance(unicode_, str):
        return unicode_

    if not isinstance(to_encoding, (list, tuple)):
        to_encoding = [to_encoding]

    for enc in to_encoding:
        try:
            return unicode_.encode(enc)
        except UnicodeEncodeError:
            pass

    return unicode_.encode(to_encoding[0], 'replace')


def safe_unicode(str_, from_encoding=None):
    """
    safe unicode function. Does few trick to turn str_ into unicode

    :param str_: string to decode
    :param from_encoding: encode from this type UTF8 default
    :rtype: unicode
    :returns: unicode object
    """
    from_encoding = from_encoding or ['utf8']

    if isinstance(str_, unicode):
        return str_

    if not isinstance(from_encoding, (list, tuple)):
        from_encoding = [from_encoding]

    try:
        return unicode(str_)
    except UnicodeDecodeError:
        pass

    for enc in from_encoding:
        try:
            return unicode(str_, enc)
        except UnicodeDecodeError:
            pass

    return unicode(str_, from_encoding[0], 'replace')


class AttributeDict(dict):
    def __getattr__(self, attr):
        return self.get(attr, None)
    __setattr__ = dict.__setitem__
    __delattr__ = dict.__delitem__


def sha1(val):
    return hashlib.sha1(val).hexdigest()