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reference.go
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// Copyright 2024 Linka Cloud 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 openfga
import (
"fmt"
"strings"
)
type Reference interface {
Ref(id string) string
IDs(refs ...string) ([]string, error)
Type() string
}
func NewReference(res string) Reference {
return identifier(res)
}
type identifier string
func (i identifier) Ref(id string) string {
return fmt.Sprintf("%s:%s", string(i), id)
}
func (i identifier) IDs(refs ...string) (out []string, err error) {
for _, ref := range refs {
if !strings.HasPrefix(ref, string(i)+":") {
return nil, fmt.Errorf("invalid reference: %s for %s", ref, i)
}
out = append(out, strings.TrimPrefix(ref, string(i)+":"))
}
return
}
func (i identifier) Type() string {
return string(i)
}
func NewReferenceWithRelation(res, rel string) Reference {
return identifierWithRelation{res: res, rel: rel}
}
type identifierWithRelation struct {
res string
rel string
}
func (i identifierWithRelation) Ref(id string) string {
return fmt.Sprintf("%s:%s#%s", i.res, id, i.rel)
}
func (i identifierWithRelation) IDs(refs ...string) (out []string, err error) {
for _, ref := range refs {
if !strings.HasPrefix(ref, i.res+":") {
return nil, fmt.Errorf("invalid reference: %s for %s#%s", ref, i.res, i.rel)
}
if !strings.HasSuffix(ref, "#"+i.rel) {
return nil, fmt.Errorf("invalid reference: %s for %s#%s", ref, i.res, i.rel)
}
out = append(out, strings.Split(strings.TrimPrefix(ref, i.res+":"), "#")[0])
}
return
}
func (i identifierWithRelation) Type() string {
return i.res
}