Add favorites capability

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, ""),