forked from casbin/casbin
/
assertion.go
60 lines (53 loc) · 1.65 KB
/
assertion.go
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// 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 model
import (
"errors"
"strings"
"github.com/casbin/casbin/log"
"github.com/casbin/casbin/rbac"
)
// Assertion represents an expression in a section of the model.
// For example: r = sub, obj, act
type Assertion struct {
Key string
Value string
Tokens []string
Policy [][]string
RM rbac.RoleManager
}
func (ast *Assertion) buildRoleLinks(rm rbac.RoleManager) {
ast.RM = rm
count := strings.Count(ast.Value, "_")
for _, rule := range ast.Policy {
if count < 2 {
panic(errors.New("the number of \"_\" in role definition should be at least 2"))
}
if len(rule) < count {
panic(errors.New("grouping policy elements do not meet role definition"))
}
if count == 2 {
// error intentionally ignored
ast.RM.AddLink(rule[0], rule[1])
} else if count == 3 {
// error intentionally ignored
ast.RM.AddLink(rule[0], rule[1], rule[2])
} else if count == 4 {
// error intentionally ignored
ast.RM.AddLink(rule[0], rule[1], rule[2], rule[3])
}
}
log.LogPrint("Role links for: " + ast.Key)
ast.RM.PrintRoles()
}