Add favorites capability

changelog/unreleased/favorites-capability.md

@@ -0,0 +1,5 @@
+Enhancement: Favorites capability
+
+We've added a capability for the storage frontend which can be used to announce to clients whether or not favorites are supported. By default this is disabled because the listing of favorites doesn't survive service restarts at the moment.
+
+https://github.com/owncloud/ocis/pull/2599

storage/pkg/command/frontend.go

@@ -83,6 +83,7 @@ func Frontend(cfg *config.Config) *cli.Command {
 				"versioning":        true,
 				"archivers":         archivers,
 				"app_providers":     appProviders,
+				"favorites":         cfg.Reva.Frontend.Favorites,
 			}
 
 			if cfg.Reva.DefaultUploadProtocol == "tus" {

storage/pkg/config/config.go

@@ -149,6 +149,7 @@ type FrontendPort struct {
 	AppProviderPrefix       string
 	ArchiverPrefix          string
 	DatagatewayPrefix       string
+	Favorites               bool
 	OCDavPrefix             string
 	OCSPrefix               string
 	OCSSharePrefix          string

storage/pkg/flagset/frontend.go

@@ -129,6 +129,13 @@ func FrontendWithConfig(cfg *config.Config) []cli.Flag {
 			EnvVars:     []string{"STORAGE_FRONTEND_DATAGATEWAY_PREFIX"},
 			Destination: &cfg.Reva.Frontend.DatagatewayPrefix,
 		},
+		&cli.BoolFlag{
+			Name:        "favorites",
+			Value:       flags.OverrideDefaultBool(cfg.Reva.Frontend.Favorites, false),
+			Usage:       "announces favorites support to clients",
+			EnvVars:     []string{"STORAGE_FRONTEND_FAVORITES"},
+			Destination: &cfg.Reva.Frontend.Favorites,
+		},
 		&cli.StringFlag{
 			Name:        "ocdav-prefix",
 			Value:       flags.OverrideDefaultString(cfg.Reva.Frontend.OCDavPrefix, ""),