def _getSmartIndenter(indenterName, qpart, indenter):
    """Get indenter by name.
    Available indenters are none, normal, cstyle, haskell, lilypond, lisp, python, ruby, xml
    Indenter name is not case sensitive
    Raise KeyError if not found
    indentText is indentation, which shall be used. i.e. '\t' for tabs, '    ' for 4 space symbols
    """
    indenterName = indenterName.lower()

    if indenterName in ('haskell', 'lilypond'):  # not supported yet
        logger.warning('Smart indentation for %s not supported yet. But you could be a hero who implemented it' % indenterName)
        from qutepart.indenter.base import IndentAlgNormal as indenterClass
    elif 'none' == indenterName:
        from qutepart.indenter.base import IndentAlgBase as indenterClass
    elif 'normal' == indenterName:
        from qutepart.indenter.base import IndentAlgNormal as indenterClass
    elif 'cstyle' == indenterName:
        from qutepart.indenter.cstyle import IndentAlgCStyle as indenterClass
    elif 'python' == indenterName:
        from qutepart.indenter.python import IndentAlgPython as indenterClass
    elif 'ruby' == indenterName:
        from qutepart.indenter.ruby import IndentAlgRuby as indenterClass
    elif 'xml' == indenterName:
        from qutepart.indenter.xmlindent import IndentAlgXml as indenterClass
    elif 'haskell' == indenterName:
        from qutepart.indenter.haskell import IndenterHaskell as indenterClass
    elif 'lilypond' == indenterName:
        from qutepart.indenter.lilypond import IndenterLilypond as indenterClass
    elif 'lisp' == indenterName:
        from qutepart.indenter.lisp import IndentAlgLisp as indenterClass
    elif 'scheme' == indenterName:
        from qutepart.indenter.scheme import IndentAlgScheme as indenterClass
    else:
        raise KeyError("Indenter %s not found" % indenterName)

    return indenterClass(qpart, indenter)
def ban_user(user_id=None):
    if not Permission(CanBanUser, identity=current_user):
        flash(_("You do not have the permissions to ban this user."), "danger")
        return redirect(url_for("management.overview"))

    # ajax request
    if request.is_xhr:
        ids = request.get_json()["ids"]

        data = []
        users = User.query.filter(User.id.in_(ids)).all()
        for user in users:
            # don't let a user ban himself and do not allow a moderator to ban
            # a admin user
            if (
                current_user.id == user.id or
                Permission(IsAdmin, identity=user) and
                Permission(Not(IsAdmin), current_user)
            ):
                continue

            elif user.ban():
                data.append({
                    "id": user.id,
                    "type": "ban",
                    "reverse": "unban",
                    "reverse_name": _("Unban"),
                    "reverse_url": url_for("management.unban_user",
                                           user_id=user.id)
                })

        return jsonify(
            message="{} users banned.".format(len(data)),
            category="success",
            data=data,
            status=200
        )

    user = User.query.filter_by(id=user_id).first_or_404()

    # Do not allow moderators to ban admins
    if Permission(IsAdmin, identity=user) and \
       Permission(Not(IsAdmin), identity=current_user):

        flash(_("A moderator cannot ban an admin user."), "danger")
        return redirect(url_for("management.overview"))

    if not current_user.id == user.id and user.ban():
        flash(_("User is now banned."), "success")
    else:
        flash(_("Could not ban user."), "danger")

    return redirect(url_for("management.banned_users"))