mirror of
https://github.com/minio/minio.git
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138 lines
3.3 KiB
Go
138 lines
3.3 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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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/v7/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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// Equals - checks whether given action set is equal to current action set or not.
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func (actionSet ActionSet) Equals(sactionSet ActionSet) bool {
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// If length of set is not equal to length of given set, the
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// set is not equal to given set.
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if len(actionSet) != len(sactionSet) {
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return false
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}
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// As both sets are equal in length, check each elements are equal.
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for k := range actionSet {
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if _, ok := sactionSet[k]; !ok {
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return false
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}
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}
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return true
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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, Errorf("empty actions not allowed")
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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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// Clone clones ActionSet structure
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func (actionSet ActionSet) Clone() ActionSet {
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return NewActionSet(actionSet.ToSlice()...)
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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 Errorf("empty actions not allowed")
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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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