first prototype of a CS3 permissions service

settings/pkg/server/grpc/server.go

@@ -1,10 +1,15 @@
 package grpc
 
 import (
+	"context"
+
+	permissions "github.com/cs3org/go-cs3apis/cs3/permissions/v1beta1"
 	"github.com/owncloud/ocis/ocis-pkg/service/grpc"
 	"github.com/owncloud/ocis/ocis-pkg/version"
 	"github.com/owncloud/ocis/settings/pkg/proto/v0"
 	svc "github.com/owncloud/ocis/settings/pkg/service/v0"
+	"go-micro.dev/v4/api"
+	"go-micro.dev/v4/server"
 )
 
 // Server initializes a new go-micro service ready to run
@@ -35,5 +40,37 @@ func Server(opts ...Option) grpc.Service {
 		options.Logger.Fatal().Err(err).Msg("could not register Permission service handler")
 	}
 
+	if err := RegisterCS3PermissionsServiceHandler(service.Server(), handle); err != nil {
+		options.Logger.Fatal().Err(err).Msg("could not register CS3 Permission service handler")
+	}
+
 	return service
 }
+
+func RegisterCS3PermissionsServiceHandler(s server.Server, hdlr permissions.PermissionsAPIServer, opts ...server.HandlerOption) error {
+	type permissionsService interface {
+		CheckPermission(context.Context, *permissions.CheckPermissionRequest, *permissions.CheckPermissionResponse) error
+	}
+	type PermissionsAPI struct {
+		permissionsService
+	}
+	h := &permissionsServiceHandler{hdlr}
+	opts = append(opts, api.WithEndpoint(&api.Endpoint{
+		Name:    "PermissionsService.Checkpermission",
+		Path:    []string{"/api/v0/permissions/check-permission"},
+		Method:  []string{"POST"},
+		Body:    "*",
+		Handler: "rpc",
+	}))
+	return s.Handle(s.NewHandler(&PermissionsAPI{h}, opts...))
+}
+
+type permissionsServiceHandler struct {
+	api permissions.PermissionsAPIServer
+}
+
+func (h *permissionsServiceHandler) CheckPermission(ctx context.Context, req *permissions.CheckPermissionRequest, res *permissions.CheckPermissionResponse) error {
+	r, err := h.api.CheckPermission(ctx, req)
+	*res = *r
+	return err
+}