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evaluator.go
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evaluator.go
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// Copyright Project Harbor Authors
//
// 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 evaluator
import (
"context"
"github.com/goharbor/harbor/src/pkg/permission/types"
)
// Evaluator the permission evaluator
type Evaluator interface {
// HasPermission returns true when user has action permission for the resource
HasPermission(ctx context.Context, resource types.Resource, action types.Action) bool
}
// Evaluators evaluator set
type Evaluators []Evaluator
// Add adds an evaluator to a given slice of evaluators
func (evaluators Evaluators) Add(newEvaluators ...Evaluator) Evaluators {
for _, newEvaluator := range newEvaluators {
if newEvaluator == nil {
continue
}
if items, ok := newEvaluator.(Evaluators); ok {
evaluators = evaluators.Add(items...)
} else {
exists := false
for _, evaluator := range evaluators {
if evaluator == newEvaluator {
exists = true
}
}
if !exists {
evaluators = append(evaluators, newEvaluator)
}
}
}
return evaluators
}
// HasPermission returns true when one of evaluator has action permission for the resource
func (evaluators Evaluators) HasPermission(ctx context.Context, resource types.Resource, action types.Action) bool {
for _, evaluator := range evaluators {
if evaluator != nil && evaluator.HasPermission(ctx, resource, action) {
return true
}
}
return false
}