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Copy pathactionset.go
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114 lines (93 loc) · 2.56 KB
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/*
* 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"
"sort"
"github.com/minio/minio-go/pkg/set"
)
// ActionSet - set of actions.
type ActionSet map[Action]struct{}
// Add - add action to the set.
func (actionSet ActionSet) Add(action Action) {
actionSet[action] = struct{}{}
}
// Contains - checks given action exists in the action set.
func (actionSet ActionSet) Contains(action Action) bool {
_, found := actionSet[action]
return found
}
// Intersection - returns actions available in both ActionSet.
func (actionSet ActionSet) Intersection(sset ActionSet) ActionSet {
nset := NewActionSet()
for k := range actionSet {
if _, ok := sset[k]; ok {
nset.Add(k)
}
}
return nset
}
// MarshalJSON - encodes ActionSet to JSON data.
func (actionSet ActionSet) MarshalJSON() ([]byte, error) {
if len(actionSet) == 0 {
return nil, fmt.Errorf("empty action set")
}
return json.Marshal(actionSet.ToSlice())
}
func (actionSet ActionSet) String() string {
actions := []string{}
for action := range actionSet {
actions = append(actions, string(action))
}
sort.Strings(actions)
return fmt.Sprintf("%v", actions)
}
// ToSlice - returns slice of actions from the action set.
func (actionSet ActionSet) ToSlice() []Action {
actions := []Action{}
for action := range actionSet {
actions = append(actions, action)
}
return actions
}
// UnmarshalJSON - decodes JSON data to ActionSet.
func (actionSet *ActionSet) UnmarshalJSON(data []byte) error {
var sset set.StringSet
if err := json.Unmarshal(data, &sset); err != nil {
return err
}
if len(sset) == 0 {
return fmt.Errorf("empty action set")
}
*actionSet = make(ActionSet)
for _, s := range sset.ToSlice() {
action, err := parseAction(s)
if err != nil {
return err
}
actionSet.Add(action)
}
return nil
}
// NewActionSet - creates new action set.
func NewActionSet(actions ...Action) ActionSet {
actionSet := make(ActionSet)
for _, action := range actions {
actionSet.Add(action)
}
return actionSet
}