mirror of https://github.com/minio/minio.git
148 lines
3.4 KiB
Go
148 lines
3.4 KiB
Go
/*
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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 iampolicy
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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/pkg/set"
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)
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// ResourceSet - set of resources in policy statement.
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type ResourceSet map[Resource]struct{}
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// bucketResourceExists - checks if at least one bucket resource exists in the set.
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func (resourceSet ResourceSet) bucketResourceExists() bool {
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for resource := range resourceSet {
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if resource.isBucketPattern() {
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return true
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}
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}
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return false
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}
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// objectResourceExists - checks if at least one object resource exists in the set.
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func (resourceSet ResourceSet) objectResourceExists() bool {
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for resource := range resourceSet {
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if resource.isObjectPattern() {
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return true
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}
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}
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return false
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}
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// Add - adds resource to resource set.
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func (resourceSet ResourceSet) Add(resource Resource) {
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resourceSet[resource] = struct{}{}
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}
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// Intersection - returns resources available in both ResourceSet.
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func (resourceSet ResourceSet) Intersection(sset ResourceSet) ResourceSet {
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nset := NewResourceSet()
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for k := range resourceSet {
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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 ResourceSet to JSON data.
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func (resourceSet ResourceSet) MarshalJSON() ([]byte, error) {
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if len(resourceSet) == 0 {
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return nil, fmt.Errorf("empty resource set")
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}
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resources := []Resource{}
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for resource := range resourceSet {
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resources = append(resources, resource)
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}
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return json.Marshal(resources)
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}
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// Match - matches object name with anyone of resource pattern in resource set.
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func (resourceSet ResourceSet) Match(resource string, conditionValues map[string][]string) bool {
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for r := range resourceSet {
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if r.Match(resource, conditionValues) {
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return true
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}
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}
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return false
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}
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func (resourceSet ResourceSet) String() string {
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resources := []string{}
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for resource := range resourceSet {
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resources = append(resources, resource.String())
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}
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sort.Strings(resources)
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return fmt.Sprintf("%v", resources)
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}
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// UnmarshalJSON - decodes JSON data to ResourceSet.
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func (resourceSet *ResourceSet) 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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*resourceSet = make(ResourceSet)
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for _, s := range sset.ToSlice() {
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resource, err := parseResource(s)
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if err != nil {
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return err
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}
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if _, found := (*resourceSet)[resource]; found {
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return fmt.Errorf("duplicate resource '%v' found", s)
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}
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resourceSet.Add(resource)
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}
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return nil
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}
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// Validate - validates ResourceSet.
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func (resourceSet ResourceSet) Validate() error {
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for resource := range resourceSet {
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if err := resource.Validate(); err != nil {
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return err
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}
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}
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return nil
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}
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// NewResourceSet - creates new resource set.
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func NewResourceSet(resources ...Resource) ResourceSet {
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resourceSet := make(ResourceSet)
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for _, resource := range resources {
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resourceSet.Add(resource)
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}
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return resourceSet
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}
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