Space Trash-bin expiration cli (#5500)

* add storage-users trash-bin cli
add task to clean up outdated trash-bin resources
add trash-bin cli purge-expired command to purge expired trash-bin resources
add purge-expired task tests

services/storage-users/pkg/command/root.go

@@ -19,6 +19,7 @@ func GetCommands(cfg *config.Config) cli.Commands {
 
 		// interaction with this service
 		Uploads(cfg),
+		TrashBin(cfg),
 
 		// infos about this service
 		Health(cfg),

services/storage-users/pkg/command/server.go

@@ -7,6 +7,7 @@ import (
 	"path"
 
 	"github.com/cs3org/reva/v2/cmd/revad/runtime"
+	"github.com/cs3org/reva/v2/pkg/rgrpc/todo/pool"
 	"github.com/gofrs/uuid"
 	"github.com/oklog/run"
 	"github.com/owncloud/ocis/v2/ocis-pkg/config/configlog"
@@ -15,6 +16,7 @@ import (
 	"github.com/owncloud/ocis/v2/ocis-pkg/version"
 	"github.com/owncloud/ocis/v2/services/storage-users/pkg/config"
 	"github.com/owncloud/ocis/v2/services/storage-users/pkg/config/parser"
+	"github.com/owncloud/ocis/v2/services/storage-users/pkg/event"
 	"github.com/owncloud/ocis/v2/services/storage-users/pkg/logging"
 	"github.com/owncloud/ocis/v2/services/storage-users/pkg/revaconfig"
 	"github.com/owncloud/ocis/v2/services/storage-users/pkg/server/debug"
@@ -88,6 +90,27 @@ func Server(cfg *config.Config) *cli.Command {
 				logger.Fatal().Err(err).Msg("failed to register the grpc endpoint")
 			}
 
+			{
+				stream, err := event.NewStream(cfg.Events)
+				if err != nil {
+					logger.Fatal().Err(err).Msg("can't connect to nats")
+				}
+
+				gw, err := pool.GetGatewayServiceClient(cfg.Reva.Address)
+				if err != nil {
+					return err
+				}
+
+				eventSVC, err := event.NewService(gw, stream, logger, *cfg)
+				if err != nil {
+					logger.Fatal().Err(err).Msg("can't create event service")
+				}
+
+				gr.Add(eventSVC.Run, func(_ error) {
+					cancel()
+				})
+			}
+
 			return gr.Run()
 		},
 	}

services/storage-users/pkg/command/trash_bin.go

@@ -0,0 +1,55 @@
+package command
+
+import (
+	"time"
+
+	"github.com/cs3org/reva/v2/pkg/events"
+	"github.com/owncloud/ocis/v2/ocis-pkg/config/configlog"
+	"github.com/owncloud/ocis/v2/services/storage-users/pkg/config"
+	"github.com/owncloud/ocis/v2/services/storage-users/pkg/config/parser"
+	"github.com/owncloud/ocis/v2/services/storage-users/pkg/event"
+	"github.com/urfave/cli/v2"
+)
+
+// TrashBin wraps trash-bin related sub-commands.
+func TrashBin(cfg *config.Config) *cli.Command {
+	return &cli.Command{
+		Name:  "trash-bin",
+		Usage: "manage trash-bin's",
+		Subcommands: []*cli.Command{
+			PurgeExpiredResources(cfg),
+		},
+	}
+}
+
+// PurgeExpiredResources cli command removes old trash-bin items.
+func PurgeExpiredResources(cfg *config.Config) *cli.Command {
+	return &cli.Command{
+		Name:  "purge-expired",
+		Usage: "Purge expired trash-bin items",
+		Flags: []cli.Flag{},
+		Before: func(c *cli.Context) error {
+			return configlog.ReturnFatal(parser.ParseConfig(cfg))
+		},
+		Action: func(c *cli.Context) error {
+			stream, err := event.NewStream(cfg.Events)
+			if err != nil {
+				return err
+			}
+
+			if err := events.Publish(stream, event.PurgeTrashBin{ExecutionTime: time.Now()}); err != nil {
+				return err
+			}
+
+			// go-micro nats implementation uses async publishing,
+			// therefore we need to manually wait.
+			//
+			// FIXME: upstream pr
+			//
+			// https://github.com/go-micro/plugins/blob/3e77393890683be4bacfb613bc5751867d584692/v4/events/natsjs/nats.go#L115
+			time.Sleep(5 * time.Second)
+
+			return nil
+		},
+	}
+}