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service.go
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service.go
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package rbac
import (
"net/http"
"github.com/casbin/casbin"
"github.com/casbin/casbin/model"
"github.com/casbin/casbin/persist"
"gorm.io/gorm"
"github.com/M15t/gram/pkg/rbac/casbinadapter"
"github.com/M15t/gram/pkg/server"
)
// Custom errors
var (
ErrForbiddenAccess = server.NewHTTPError(http.StatusForbidden, "FORBIDDEN", "You don't have permission to access the requested resource")
ErrForbiddenAction = server.NewHTTPError(http.StatusForbidden, "FORBIDDEN", "You don't have permission to perform this action")
)
// Config represents the config for RBAC service
type Config struct {
Model model.Model
Adapter persist.Adapter
GormDB *gorm.DB
EnableLog bool
}
// RBAC is RBAC application service
type RBAC struct {
*casbin.Enforcer
}
// Intf represents common interface for the RBAC service
type Intf interface {
Enforce(rvals ...interface{}) bool
}
// DefaultConfig represents the default configuration
var DefaultConfig = Config{
Model: NewRBACModel(),
Adapter: nil,
GormDB: nil,
EnableLog: true,
}
// New creates new RBAC service with default configuration
func New() *RBAC {
return NewWithConfig(DefaultConfig)
}
// NewWithConfig creates new RBAC service with custom configuration
func NewWithConfig(cfg Config) *RBAC {
if cfg.Model == nil {
cfg.Model = DefaultConfig.Model
}
if cfg.GormDB == nil {
cfg.GormDB = DefaultConfig.GormDB
}
if cfg.GormDB != nil {
cfg.Adapter = casbinadapter.NewAdapter(cfg.GormDB)
} else if cfg.Adapter == nil {
cfg.Adapter = DefaultConfig.Adapter
}
var ce *casbin.Enforcer
if cfg.Adapter != nil {
ce = casbin.NewEnforcer(cfg.Model, cfg.Adapter, cfg.EnableLog)
} else {
ce = casbin.NewEnforcer(cfg.Model, cfg.EnableLog)
}
return &RBAC{ce}
}
// NewRBACModel initializes the RBAC casbin model
func NewRBACModel() model.Model {
m := casbin.NewModel()
m.AddDef("r", "r", "sub, obj, act")
m.AddDef("p", "p", "sub, obj, act")
m.AddDef("g", "g", "_, _")
m.AddDef("e", "e", "some(where (p.eft == allow))")
m.AddDef("m", "m", `g(r.sub, p.sub) && (r.obj == p.obj || p.obj == "*") && (r.act == p.act || p.act == "*")`)
return m
}
// NewRBACWithLevelInheritanceModel initializes the RBAC with level inheritance model
func NewRBACWithLevelInheritanceModel() model.Model {
m := casbin.NewModel()
m.AddDef("r", "r", "sub, lvl, obj, act")
m.AddDef("p", "p", "sub, lvl, obj, act")
m.AddDef("g", "g", "_, _")
m.AddDef("g", "g2", "_, _")
m.AddDef("e", "e", "some(where (p.eft == allow))")
m.AddDef("m", "m", `((r.sub != p.sub && g(r.sub, p.sub)) || (r.sub == p.sub && g2(p.lvl, r.lvl))) && (r.obj == p.obj || p.obj == "*") && (r.act == p.act || p.act == "*")`)
return m
}
// NewRBACWithDomainModel initializes the RBAC with domain model
func NewRBACWithDomainModel() model.Model {
m := casbin.NewModel()
m.AddDef("r", "r", "sub, dom, obj, act")
m.AddDef("p", "p", "sub, dom, obj, act")
m.AddDef("g", "g", "_, _, _")
m.AddDef("e", "e", "some(where (p.eft == allow))")
m.AddDef("m", "m", `g(r.sub, p.sub, r.dom) && r.dom == p.dom && r.obj == p.obj && r.act == p.act`)
return m
}