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adapter.go
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adapter.go
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package adapter
import (
"context"
"fmt"
"runtime"
"strings"
"github.com/casbin/casbin/v2/model"
"github.com/casbin/casbin/v2/persist"
"github.com/gogf/gf/v2/database/gdb"
)
type CasbinRule struct {
Id int64 `json:"id"` //
PType string `json:"p_type"` //
V0 string `json:"v0"` //
V1 string `json:"v1"` //
V2 string `json:"v2"` //
V3 string `json:"v3"` //
V4 string `json:"v4"` //
V5 string `json:"v5"` //
}
const (
CASBINRULE_TABLE_NAME = "casbin_rule"
)
// Options 输入配置
type Options struct {
GDB gdb.DB // gdb
TableName string // 表名
}
// Adapter represents the Xorm adapter for policy storage.
type Adapter struct {
o gdb.DB
tableName string
}
func NewAdapter(opts Options) *Adapter {
a := &Adapter{
o: opts.GDB,
tableName: CASBINRULE_TABLE_NAME,
}
if opts.TableName != "" {
a.tableName = opts.TableName
}
// Open the DB, create it if not existed.
a.open()
// Call the destructor when the object is released.
runtime.SetFinalizer(a, finalizer)
return a
}
// NewAdapterWithTableName 设置表名
//
// createTime: 2022-03-04 17:04:32
//
// author: hailaz
func NewAdapterWithTableName(gdb gdb.DB, tableName string) *Adapter {
return NewAdapter(Options{GDB: gdb, TableName: tableName})
}
// finalizer is the destructor for Adapter.
func finalizer(a *Adapter) {
}
func (a *Adapter) open() {
}
func (a *Adapter) close() {
a.o.Close(context.TODO())
a.o = nil
}
func (a *Adapter) createTable() {
}
func (a *Adapter) dropTable() {
}
func loadPolicyLine(line CasbinRule, model model.Model) {
lineText := strings.Join([]string{
line.PType,
line.V0,
line.V1,
line.V2,
line.V3,
line.V4,
line.V5,
}, ",")
lineText = strings.TrimRight(lineText, ",")
persist.LoadPolicyLine(lineText, model)
}
// LoadPolicy loads policy from database.
func (a *Adapter) LoadPolicy(model model.Model) error {
var lines []CasbinRule
err := a.o.Model(a.tableName).Scan(&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 {
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.Insert(context.TODO(), a.tableName, 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(context.TODO(), a.tableName, &line)
return err
}
// RemovePolicy removes a policy rule from the storage.
func (a *Adapter) RemovePolicy(sec string, ptype string, rule []string) error {
qs := a.o.Model(a.tableName).Safe()
qs = qs.Where("p_type", ptype)
for index := 0; index < len(rule); index++ {
qs = qs.Where(fmt.Sprintf("v%d", index), rule[index])
}
_, err := qs.Delete()
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 {
qs := a.o.Model(a.tableName).Safe()
qs = qs.Where("p_type", ptype)
for index := 0; index <= 5; index++ {
if fieldIndex <= index && index < fieldIndex+len(fieldValues) {
qs = qs.Where(fmt.Sprintf("v%d", index), fieldValues[index-fieldIndex])
}
}
_, err := qs.Delete()
return err
}