/
resourceset.go
198 lines (163 loc) · 4.88 KB
/
resourceset.go
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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package policy
import (
"encoding/json"
"fmt"
"sort"
"github.com/minio/minio-go/v7/pkg/set"
)
// ResourceSet - set of resources in policy statement.
type ResourceSet map[Resource]struct{}
// BucketResourceExists - checks if at least one bucket resource exists in the set.
func (resourceSet ResourceSet) BucketResourceExists() bool {
for resource := range resourceSet {
if resource.isBucketPattern() {
return true
}
}
return false
}
// ObjectResourceExists - checks if at least one object resource exists in the set.
func (resourceSet ResourceSet) ObjectResourceExists() bool {
for resource := range resourceSet {
if resource.isObjectPattern() {
return true
}
}
return false
}
// Add - adds resource to resource set.
func (resourceSet ResourceSet) Add(resource Resource) {
resourceSet[resource] = struct{}{}
}
// Equals - checks whether given resource set is equal to current resource set or not.
func (resourceSet ResourceSet) Equals(sresourceSet ResourceSet) bool {
// If length of set is not equal to length of given set, the
// set is not equal to given set.
if len(resourceSet) != len(sresourceSet) {
return false
}
// As both sets are equal in length, check each elements are equal.
for k := range resourceSet {
if _, ok := sresourceSet[k]; !ok {
return false
}
}
return true
}
// Intersection - returns resources available in both ResourceSet.
func (resourceSet ResourceSet) Intersection(sset ResourceSet) ResourceSet {
nset := NewResourceSet()
for k := range resourceSet {
if _, ok := sset[k]; ok {
nset.Add(k)
}
}
return nset
}
// MarshalJSON - encodes ResourceSet to JSON data.
func (resourceSet ResourceSet) MarshalJSON() ([]byte, error) {
resources := []Resource{}
for resource := range resourceSet {
resources = append(resources, resource)
}
return json.Marshal(resources)
}
// MatchResource matches object name with resource patterns only.
func (resourceSet ResourceSet) MatchResource(resource string) bool {
for r := range resourceSet {
if r.MatchResource(resource) {
return true
}
}
return false
}
// Match - matches object name with anyone of resource pattern in resource set.
func (resourceSet ResourceSet) Match(resource string, conditionValues map[string][]string) bool {
for r := range resourceSet {
if r.Match(resource, conditionValues) {
return true
}
}
return false
}
func (resourceSet ResourceSet) String() string {
resources := []string{}
for resource := range resourceSet {
resources = append(resources, resource.String())
}
sort.Strings(resources)
return fmt.Sprintf("%v", resources)
}
// UnmarshalJSON - decodes JSON data to ResourceSet.
func (resourceSet *ResourceSet) UnmarshalJSON(data []byte) error {
var sset set.StringSet
if err := json.Unmarshal(data, &sset); err != nil {
return err
}
*resourceSet = make(ResourceSet)
for _, s := range sset.ToSlice() {
resource, err := parseResource(s)
if err != nil {
return err
}
if _, found := (*resourceSet)[resource]; found {
return Errorf("duplicate resource '%v' found", s)
}
resourceSet.Add(resource)
}
return nil
}
// Validate - validates ResourceSet.
func (resourceSet ResourceSet) Validate() error {
for resource := range resourceSet {
if err := resource.Validate(); err != nil {
return err
}
}
return nil
}
// ValidateBucket - validates ResourceSet is for given bucket or not.
func (resourceSet ResourceSet) ValidateBucket(bucketName string) error {
for resource := range resourceSet {
if err := resource.ValidateBucket(bucketName); err != nil {
return err
}
}
return nil
}
// ToSlice - returns slice of resources from the resource set.
func (resourceSet ResourceSet) ToSlice() []Resource {
resources := []Resource{}
for resource := range resourceSet {
resources = append(resources, resource)
}
return resources
}
// Clone clones ResourceSet structure
func (resourceSet ResourceSet) Clone() ResourceSet {
return NewResourceSet(resourceSet.ToSlice()...)
}
// NewResourceSet - creates new resource set.
func NewResourceSet(resources ...Resource) ResourceSet {
resourceSet := make(ResourceSet)
for _, resource := range resources {
resourceSet.Add(resource)
}
return resourceSet
}