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utils.go
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/
utils.go
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/*******************************************************************************
*
* Copyright 2021 SAP SE
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You should have received a copy of the License along with this
* program. If not, you may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*******************************************************************************/
package plugins
import (
"github.com/sapcc/go-api-declarations/castellum"
"github.com/sapcc/go-bits/errext"
)
// UserError is an error wrapper that allows to mark errors as "failed" instead
// of "errored" without having to carry a separate OperationOutcome value.
//
// TODO upstream this into internal/core and remove OperationOutcome return values from the fallible methods on AssetManager
type UserError struct {
Inner error
}
// Error implements the builtin/error interface.
func (e UserError) Error() string {
return e.Inner.Error()
}
// Cause implements the causer interface implied by errors.Cause().
func (e UserError) Cause() error {
return e.Inner
}
// Classify inspects the given error, unwraps UserError if possible, and adds an
// appropriate castellum.OperationOutcome to the result.
func Classify(err error) (castellum.OperationOutcome, error) {
if err == nil {
return castellum.OperationOutcomeSucceeded, nil
}
if uerr, ok := errext.As[UserError](err); ok {
return castellum.OperationOutcomeFailed, uerr.Inner
} else {
return castellum.OperationOutcomeErrored, err
}
}