mirror of https://github.com/astaxie/beego.git
76 lines
1.9 KiB
Go
76 lines
1.9 KiB
Go
// Copyright 2018 The casbin Authors. All Rights Reserved.
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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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package effect
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import "github.com/pkg/errors"
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// DefaultEffector is default effector for Casbin.
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type DefaultEffector struct {
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}
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// NewDefaultEffector is the constructor for DefaultEffector.
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func NewDefaultEffector() *DefaultEffector {
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e := DefaultEffector{}
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return &e
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}
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// MergeEffects merges all matching results collected by the enforcer into a single decision.
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func (e *DefaultEffector) MergeEffects(expr string, effects []Effect, results []float64) (bool, error) {
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result := false
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if expr == "some(where (p_eft == allow))" {
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result = false
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for _, eft := range effects {
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if eft == Allow {
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result = true
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break
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}
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}
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} else if expr == "!some(where (p_eft == deny))" {
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result = true
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for _, eft := range effects {
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if eft == Deny {
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result = false
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break
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}
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}
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} else if expr == "some(where (p_eft == allow)) && !some(where (p_eft == deny))" {
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result = false
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for _, eft := range effects {
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if eft == Allow {
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result = true
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} else if eft == Deny {
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result = false
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break
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}
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}
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} else if expr == "priority(p_eft) || deny" {
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result = false
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for _, eft := range effects {
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if eft != Indeterminate {
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if eft == Allow {
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result = true
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} else {
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result = false
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}
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break
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}
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}
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} else {
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return false, errors.New("unsupported effect")
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}
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return result, nil
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}
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