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minio/pkg/policy/effect.go

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1.6 KiB

/*
* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* 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 policy
import (
"encoding/json"
"fmt"
)
// Effect - policy statement effect Allow or Deny.
type Effect string
const (
// Allow - allow effect.
Allow Effect = "Allow"
// Deny - deny effect.
Deny = "Deny"
)
// IsAllowed - returns if given check is allowed or not.
func (effect Effect) IsAllowed(b bool) bool {
if effect == Allow {
return b
}
return !b
}
// IsValid - checks if Effect is valid or not
func (effect Effect) IsValid() bool {
switch effect {
case Allow, Deny:
return true
}
return false
}
// MarshalJSON - encodes Effect to JSON data.
func (effect Effect) MarshalJSON() ([]byte, error) {
if !effect.IsValid() {
return nil, fmt.Errorf("invalid effect '%v'", effect)
}
return json.Marshal(string(effect))
}
// UnmarshalJSON - decodes JSON data to Effect.
func (effect *Effect) UnmarshalJSON(data []byte) error {
var s string
if err := json.Unmarshal(data, &s); err != nil {
return err
}
e := Effect(s)
if !e.IsValid() {
return fmt.Errorf("invalid effect '%v'", s)
}
*effect = e
return nil
}