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114 lines
2.6 KiB
114 lines
2.6 KiB
/*
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* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package policy
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import (
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"encoding/json"
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"fmt"
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"sort"
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"github.com/minio/minio-go/v6/pkg/set"
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)
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// ActionSet - set of actions.
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type ActionSet map[Action]struct{}
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// Add - add action to the set.
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func (actionSet ActionSet) Add(action Action) {
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actionSet[action] = struct{}{}
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}
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// Contains - checks given action exists in the action set.
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func (actionSet ActionSet) Contains(action Action) bool {
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_, found := actionSet[action]
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return found
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}
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// Intersection - returns actions available in both ActionSet.
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func (actionSet ActionSet) Intersection(sset ActionSet) ActionSet {
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nset := NewActionSet()
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for k := range actionSet {
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if _, ok := sset[k]; ok {
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nset.Add(k)
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}
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}
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return nset
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}
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// MarshalJSON - encodes ActionSet to JSON data.
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func (actionSet ActionSet) MarshalJSON() ([]byte, error) {
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if len(actionSet) == 0 {
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return nil, fmt.Errorf("empty action set")
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}
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return json.Marshal(actionSet.ToSlice())
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}
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func (actionSet ActionSet) String() string {
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actions := []string{}
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for action := range actionSet {
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actions = append(actions, string(action))
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}
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sort.Strings(actions)
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return fmt.Sprintf("%v", actions)
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}
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// ToSlice - returns slice of actions from the action set.
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func (actionSet ActionSet) ToSlice() []Action {
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actions := []Action{}
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for action := range actionSet {
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actions = append(actions, action)
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}
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return actions
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}
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// UnmarshalJSON - decodes JSON data to ActionSet.
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func (actionSet *ActionSet) UnmarshalJSON(data []byte) error {
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var sset set.StringSet
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if err := json.Unmarshal(data, &sset); err != nil {
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return err
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}
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if len(sset) == 0 {
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return fmt.Errorf("empty action set")
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}
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*actionSet = make(ActionSet)
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for _, s := range sset.ToSlice() {
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action, err := parseAction(s)
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if err != nil {
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return err
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}
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actionSet.Add(action)
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}
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return nil
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}
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// NewActionSet - creates new action set.
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func NewActionSet(actions ...Action) ActionSet {
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actionSet := make(ActionSet)
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for _, action := range actions {
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actionSet.Add(action)
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}
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return actionSet
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}
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