openserverless/impl/onboard/user_validation.py

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# distributed with this work for additional information
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# to you under the Apache License, Version 2.0 (the
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# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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import logging
import os
import openserverless.common.validation as validation
import openserverless.common.response_builder as res_builder
from openserverless.common.kube_api_client import KubeApiClient


class UserValidation:

    def __init__(self, environ=os.environ):
        self._environ = environ
        self._kube_client = KubeApiClient()

    def validate(self, namespace):
        """
        Action to be invoked to validate the username. It checks that it respects nuvolaris rules and
        that there is no user on current nuvolaris setup with that namespace assigned.
        """

        try:
            if not validation.is_valid_username(namespace):
                return res_builder.build_error_message(
                    message=f"Account namespace {namespace} is not valid. ",
                    status_code=400,
                )

            # check that there is no wsk user already existing with the same namespace
            existing_whisk_user = self._kube_client.get_whisk_user(namespace)

            if existing_whisk_user:
                return res_builder.build_error_message(
                    message=f"Namespace {namespace} already exists on domain.",
                    status_code=409,
                )

            return res_builder.build_response_message(
                f"Username {namespace} is valid and available"
            )
        except Exception as ex:
            logging.error(ex)

        return res_builder.build_response_message(
            "Un-expected error detected attempting to setup you free account. If problem persists please get in touch with us info@nuvolaris.io"
        )