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Copy pathresourceset.go
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147 lines (120 loc) · 3.45 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"
)
// 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{}{}
}
// Intersection - returns resouces available in both ResourcsSet.
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) {
if len(resourceSet) == 0 {
return nil, fmt.Errorf("empty resource set")
}
resources := []Resource{}
for resource := range resourceSet {
resources = append(resources, resource)
}
return json.Marshal(resources)
}
// Match - matches object name with anyone of resource pattern in resource set.
func (resourceSet ResourceSet) Match(resource string) bool {
for r := range resourceSet {
if r.Match(resource) {
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 fmt.Errorf("duplicate resource '%v' found", s)
}
resourceSet.Add(resource)
}
return nil
}
// Validate - validates ResourceSet is for given bucket or not.
func (resourceSet ResourceSet) Validate(bucketName string) error {
for resource := range resourceSet {
if err := resource.Validate(bucketName); err != nil {
return err
}
}
return nil
}
// NewResourceSet - creates new resource set.
func NewResourceSet(resources ...Resource) ResourceSet {
resourceSet := make(ResourceSet)
for _, resource := range resources {
resourceSet.Add(resource)
}
return resourceSet
}