airbnb/caravel

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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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# software distributed under the License is distributed on an
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import logging
from functools import partial
from typing import Optional

from superset import security_manager
from superset.commands.base import BaseCommand
from superset.commands.dataset.columns.exceptions import (
    DatasetColumnDeleteFailedError,
    DatasetColumnForbiddenError,
    DatasetColumnNotFoundError,
)
from superset.connectors.sqla.models import TableColumn
from superset.daos.dataset import DatasetColumnDAO, DatasetDAO
from superset.exceptions import SupersetSecurityException
from superset.utils.decorators import on_error, transaction

logger = logging.getLogger(__name__)


class DeleteDatasetColumnCommand(BaseCommand):
    def __init__(self, dataset_id: int, model_id: int):
        self._dataset_id = dataset_id
        self._model_id = model_id
        self._model: Optional[TableColumn] = None

    @transaction(on_error=partial(on_error, reraise=DatasetColumnDeleteFailedError))
    def run(self) -> None:
        self.validate()
        assert self._model
        DatasetColumnDAO.delete([self._model])

    def validate(self) -> None:
        # Validate/populate model exists
        self._model = DatasetDAO.find_dataset_column(self._dataset_id, self._model_id)
        if not self._model:
            raise DatasetColumnNotFoundError()
        # Check ownership
        try:
            security_manager.raise_for_ownership(self._model)
        except SupersetSecurityException as ex:
            raise DatasetColumnForbiddenError() from ex