104 lines
2.8 KiB
Go
104 lines
2.8 KiB
Go
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package stringadapter
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import (
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"bytes"
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"errors"
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"strings"
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"github.com/casbin/casbin/v3/model"
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"github.com/casbin/casbin/v3/persist"
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)
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// Adapter is the string adapter for Casbin.
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// It can load policy from string or save policy to string.
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type Adapter struct {
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Line string
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}
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// NewAdapter is the constructor for Adapter.
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func NewAdapter(line string) *Adapter {
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return &Adapter{
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Line: line,
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}
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}
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// LoadPolicy loads all policy rules from the storage.
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func (a *Adapter) LoadPolicy(model model.Model) error {
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if a.Line == "" {
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return errors.New("invalid line, line cannot be empty")
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}
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strs := strings.Split(a.Line, "\n")
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for _, str := range strs {
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str = strings.TrimSpace(str)
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if str == "" {
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continue
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}
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if err := persist.LoadPolicyLine(str, model); 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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// SavePolicy saves all policy rules to the storage.
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func (a *Adapter) SavePolicy(model model.Model) error {
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var tmp bytes.Buffer
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for ptype, ast := range model["p"] {
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for _, rule := range ast.Policy {
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line, err := persist.PolicyLineToCsv(ptype, rule)
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if err != nil {
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return err
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}
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tmp.WriteString(line)
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tmp.WriteString("\n")
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}
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}
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for ptype, ast := range model["g"] {
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for _, rule := range ast.Policy {
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line, err := persist.PolicyLineToCsv(ptype, rule)
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if err != nil {
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return err
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}
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tmp.WriteString(line)
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tmp.WriteString("\n")
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}
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}
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a.Line = strings.TrimRight(tmp.String(), "\n")
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return nil
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}
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// AddPolicy adds a policy rule to the storage.
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func (a *Adapter) AddPolicy(sec string, ptype string, rule []string) error {
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return errors.New("not implemented")
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}
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// RemovePolicy removes a policy rule from the storage.
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func (a *Adapter) RemovePolicy(sec string, ptype string, rule []string) error {
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a.Line = ""
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return nil
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}
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// RemoveFilteredPolicy removes policy rules that match the filter from the storage.
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func (a *Adapter) RemoveFilteredPolicy(sec string, ptype string, fieldIndex int, fieldValues ...string) error {
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return errors.New("not implemented")
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}
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