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relation.go
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relation.go
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package v1beta1
import (
"context"
"errors"
"fmt"
"github.com/raystack/frontier/pkg/utils"
"github.com/raystack/frontier/internal/bootstrap/schema"
"google.golang.org/protobuf/types/known/timestamppb"
grpczap "github.com/grpc-ecosystem/go-grpc-middleware/logging/zap/ctxzap"
"github.com/raystack/frontier/core/relation"
frontierv1beta1 "github.com/raystack/frontier/proto/v1beta1"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
type RelationService interface {
Get(ctx context.Context, id string) (relation.Relation, error)
Create(ctx context.Context, rel relation.Relation) (relation.Relation, error)
List(ctx context.Context, f relation.Filter) ([]relation.Relation, error)
Delete(ctx context.Context, rel relation.Relation) error
}
var (
grpcRelationNotFoundErr = status.Errorf(codes.NotFound, "relation doesn't exist")
ErrNamespaceSplitNotation = errors.New("subject/object should be provided as 'namespace:uuid'")
)
func (h Handler) ListRelations(ctx context.Context, request *frontierv1beta1.ListRelationsRequest) (*frontierv1beta1.ListRelationsResponse, error) {
logger := grpczap.Extract(ctx)
var err error
var subject relation.Subject
var object relation.Object
if request.GetSubject() != "" {
subject.Namespace, subject.ID, err = schema.SplitNamespaceAndResourceID(request.GetSubject())
if err != nil {
return nil, ErrNamespaceSplitNotation
}
}
if request.GetObject() != "" {
object.Namespace, object.ID, err = schema.SplitNamespaceAndResourceID(request.GetObject())
if err != nil {
return nil, ErrNamespaceSplitNotation
}
}
var relations []*frontierv1beta1.Relation
relationsList, err := h.relationService.List(ctx, relation.Filter{
Subject: subject,
Object: object,
})
if err != nil {
logger.Error(err.Error())
return nil, grpcInternalServerError
}
for _, r := range relationsList {
relationPB, err := transformRelationV2ToPB(r)
if err != nil {
logger.Error(err.Error())
return nil, grpcInternalServerError
}
relations = append(relations, relationPB)
}
return &frontierv1beta1.ListRelationsResponse{
Relations: relations,
}, nil
}
func (h Handler) CreateRelation(ctx context.Context, request *frontierv1beta1.CreateRelationRequest) (*frontierv1beta1.CreateRelationResponse, error) {
logger := grpczap.Extract(ctx)
if request.GetBody() == nil {
return nil, grpcBadBodyError
}
subjectNamespace, subjectID, err := schema.SplitNamespaceAndResourceID(request.GetBody().GetSubject())
if err != nil {
return nil, ErrNamespaceSplitNotation
}
objectNamespace, objectID, err := schema.SplitNamespaceAndResourceID(request.GetBody().GetObject())
if err != nil {
return nil, ErrNamespaceSplitNotation
}
// If Principal is a user, then we will get ID for that user as Subject.ID
if subjectNamespace == schema.UserPrincipal {
if !utils.IsValidUUID(subjectID) {
// could be email
fetchedUser, err := h.userService.GetByEmail(ctx, subjectID)
if err != nil {
return nil, grpcUserNotFoundError
}
subjectID = fetchedUser.ID
}
}
newRelation, err := h.relationService.Create(ctx, relation.Relation{
Object: relation.Object{
ID: objectID,
Namespace: objectNamespace,
},
Subject: relation.Subject{
ID: subjectID,
Namespace: subjectNamespace,
SubRelationName: request.GetBody().GetSubjectSubRelation(),
},
RelationName: request.GetBody().GetRelation(),
})
if err != nil {
logger.Error(err.Error())
switch {
case errors.Is(err, relation.ErrInvalidDetail):
return nil, grpcBadBodyError
default:
formattedErr := fmt.Errorf("%s: %w", ErrInternalServer, err)
logger.Error(formattedErr.Error())
return nil, status.Errorf(codes.Internal, ErrInternalServer.Error())
}
}
relationPB, err := transformRelationV2ToPB(newRelation)
if err != nil {
logger.Error(err.Error())
return nil, grpcInternalServerError
}
return &frontierv1beta1.CreateRelationResponse{
Relation: relationPB,
}, nil
}
func (h Handler) GetRelation(ctx context.Context, request *frontierv1beta1.GetRelationRequest) (*frontierv1beta1.GetRelationResponse, error) {
logger := grpczap.Extract(ctx)
fetchedRelation, err := h.relationService.Get(ctx, request.GetId())
if err != nil {
logger.Error(err.Error())
switch {
case errors.Is(err, relation.ErrNotExist),
errors.Is(err, relation.ErrInvalidUUID),
errors.Is(err, relation.ErrInvalidID):
return nil, grpcRelationNotFoundErr
default:
return nil, grpcInternalServerError
}
}
relationPB, err := transformRelationV2ToPB(fetchedRelation)
if err != nil {
logger.Error(err.Error())
return nil, grpcInternalServerError
}
return &frontierv1beta1.GetRelationResponse{
Relation: relationPB,
}, nil
}
func (h Handler) DeleteRelation(ctx context.Context, request *frontierv1beta1.DeleteRelationRequest) (*frontierv1beta1.DeleteRelationResponse, error) {
logger := grpczap.Extract(ctx)
subjectNamespace, subjectID, err := schema.SplitNamespaceAndResourceID(request.GetSubject())
if err != nil {
return nil, ErrNamespaceSplitNotation
}
objectNamespace, objectID, err := schema.SplitNamespaceAndResourceID(request.GetObject())
if err != nil {
return nil, ErrNamespaceSplitNotation
}
err = h.relationService.Delete(ctx, relation.Relation{
Object: relation.Object{
Namespace: objectNamespace,
ID: objectID,
},
Subject: relation.Subject{
Namespace: subjectNamespace,
ID: subjectID,
},
RelationName: request.GetRelation(),
})
if err != nil {
logger.Error(err.Error())
switch {
case errors.Is(err, relation.ErrNotExist),
errors.Is(err, relation.ErrInvalidUUID),
errors.Is(err, relation.ErrInvalidID):
return nil, grpcRelationNotFoundErr
default:
return nil, grpcInternalServerError
}
}
return &frontierv1beta1.DeleteRelationResponse{}, nil
}
func transformRelationV2ToPB(relation relation.Relation) (*frontierv1beta1.Relation, error) {
rel := &frontierv1beta1.Relation{
Id: relation.ID,
Object: schema.JoinNamespaceAndResourceID(relation.Object.Namespace, relation.Object.ID),
Subject: schema.JoinNamespaceAndResourceID(relation.Subject.Namespace, relation.Subject.ID),
SubjectSubRelation: relation.Subject.SubRelationName,
Relation: relation.RelationName,
}
if !relation.CreatedAt.IsZero() {
rel.CreatedAt = timestamppb.New(relation.CreatedAt)
}
if !relation.UpdatedAt.IsZero() {
rel.UpdatedAt = timestamppb.New(relation.UpdatedAt)
}
return rel, nil
}