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adapter.go
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adapter.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 beegoormadapter
import (
"runtime"
"github.com/beego/beego/v2/client/orm"
"github.com/casbin/casbin/v2/model"
"github.com/casbin/casbin/v2/persist"
)
type CasbinRule struct {
Id int
Ptype string
V0 string
V1 string
V2 string
V3 string
V4 string
V5 string
}
func init() {
//orm.RegisterModel(new(CasbinRule)) //项目中有
}
// Adapter represents the Xorm adapter for policy storage.
type Adapter struct {
driverName string
dataSourceName string
dataSourceAlias string
dbSpecified bool
o orm.Ormer
}
// finalizer is the destructor for Adapter.
func finalizer(a *Adapter) {
}
// NewAdapter is the constructor for Adapter.
// dataSourceAlias: Database alias. ORM will use it to switch database.
// driverName: database driverName.
// dataSourceName: connection string
func NewAdapter(dataSourceAlias, driverName, dataSourceName string) (*Adapter, error) {
a := &Adapter{}
a.driverName = driverName
a.dataSourceName = dataSourceName
a.dataSourceAlias = dataSourceAlias
err := a.open()
if err != nil {
return nil, err
}
// Call the destructor when the object is released.
runtime.SetFinalizer(a, finalizer)
return a, nil
}
func (a *Adapter) registerDataBase(aliasName, driverName, dataSource string, params ...orm.DBOption) error {
err := orm.RegisterDataBase(aliasName, driverName, dataSource, params...)
return err
}
func (a *Adapter) open() error {
var err error
//项目中有
//err = a.registerDataBase(a.dataSourceAlias, a.driverName, a.dataSourceName)
//if err != nil {
// return err
//}
a.o = orm.NewOrmUsingDB(a.dataSourceAlias)
err = a.createTable()
if err != nil {
return err
}
return nil
}
func (a *Adapter) close() {
a.o = nil
}
func (a *Adapter) createTable() error {
return orm.RunSyncdb(a.dataSourceAlias, false, true)
}
func (a *Adapter) dropTable() error {
return orm.RunSyncdb(a.dataSourceAlias, true, true)
}
func loadPolicyLine(line CasbinRule, model model.Model) {
lineText := line.Ptype
if line.V0 != "" {
lineText += ", " + line.V0
}
if line.V1 != "" {
lineText += ", " + line.V1
}
if line.V2 != "" {
lineText += ", " + line.V2
}
if line.V3 != "" {
lineText += ", " + line.V3
}
if line.V4 != "" {
lineText += ", " + line.V4
}
if line.V5 != "" {
lineText += ", " + line.V5
}
persist.LoadPolicyLine(lineText, model)
}
// LoadPolicy loads policy from database.
func (a *Adapter) LoadPolicy(model model.Model) error {
var lines []CasbinRule
_, err := a.o.QueryTable("casbin_rule").All(&lines)
if err != nil {
return err
}
for _, line := range lines {
loadPolicyLine(line, model)
}
return nil
}
func savePolicyLine(ptype string, rule []string) CasbinRule {
line := CasbinRule{}
line.Ptype = ptype
if len(rule) > 0 {
line.V0 = rule[0]
}
if len(rule) > 1 {
line.V1 = rule[1]
}
if len(rule) > 2 {
line.V2 = rule[2]
}
if len(rule) > 3 {
line.V3 = rule[3]
}
if len(rule) > 4 {
line.V4 = rule[4]
}
if len(rule) > 5 {
line.V5 = rule[5]
}
return line
}
// SavePolicy saves policy to database.
func (a *Adapter) SavePolicy(model model.Model) error {
err := a.dropTable()
if err != nil {
return err
}
err = a.createTable()
if err != nil {
return err
}
var lines []CasbinRule
for ptype, ast := range model["p"] {
for _, rule := range ast.Policy {
line := savePolicyLine(ptype, rule)
lines = append(lines, line)
}
}
for ptype, ast := range model["g"] {
for _, rule := range ast.Policy {
line := savePolicyLine(ptype, rule)
lines = append(lines, line)
}
}
_, err = a.o.InsertMulti(len(lines), lines)
return err
}
// AddPolicy adds a policy rule to the storage.
func (a *Adapter) AddPolicy(sec string, ptype string, rule []string) error {
line := savePolicyLine(ptype, rule)
_, err := a.o.Insert(&line)
return err
}
// RemovePolicy removes a policy rule from the storage.
func (a *Adapter) RemovePolicy(sec string, ptype string, rule []string) error {
line := savePolicyLine(ptype, rule)
_, err := a.o.Delete(&line, "ptype", "v0", "v1", "v2", "v3", "v4", "v5")
return err
}
// RemoveFilteredPolicy removes policy rules that match the filter from the storage.
func (a *Adapter) RemoveFilteredPolicy(sec string, ptype string, fieldIndex int, fieldValues ...string) error {
line := CasbinRule{}
line.Ptype = ptype
filter := []string{}
filter = append(filter, "ptype")
if fieldIndex <= 0 && 0 < fieldIndex+len(fieldValues) {
line.V0 = fieldValues[0-fieldIndex]
if line.V0 != "" {
filter = append(filter, "v0")
}
}
if fieldIndex <= 1 && 1 < fieldIndex+len(fieldValues) {
line.V1 = fieldValues[1-fieldIndex]
if line.V1 != "" {
filter = append(filter, "v1")
}
}
if fieldIndex <= 2 && 2 < fieldIndex+len(fieldValues) {
line.V2 = fieldValues[2-fieldIndex]
if line.V2 != "" {
filter = append(filter, "v2")
}
}
if fieldIndex <= 3 && 3 < fieldIndex+len(fieldValues) {
line.V3 = fieldValues[3-fieldIndex]
if line.V3 != "" {
filter = append(filter, "v3")
}
}
if fieldIndex <= 4 && 4 < fieldIndex+len(fieldValues) {
line.V4 = fieldValues[4-fieldIndex]
if line.V4 != "" {
filter = append(filter, "v4")
}
}
if fieldIndex <= 5 && 5 < fieldIndex+len(fieldValues) {
line.V5 = fieldValues[5-fieldIndex]
if line.V5 != "" {
filter = append(filter, "v5")
}
}
_, err := a.o.Delete(&line, filter...)
return err
}