Remove id autogeneration from db models

Remove automatic uuid v4 ID generation from the models and replace it
with `shared.NewId()`, which generates an Id depending on the config
setting

config/config.go

@@ -3,6 +3,7 @@ package config
 import (
 	"fmt"
 	"os"
+	"strings"
 
 	"git.mstar.dev/mstar/goutils/other"
 	"github.com/BurntSushi/toml"
@@ -131,12 +132,12 @@ type ConfigExperimental struct {
 	// if the other server also requires authorized fetch for the server actor
 	// Changing this setting is not expected to cause permanent problems
 	AuthFetchForServerActor bool `toml:"auth_fetch_for_server_actor"`
-	// Use cuid2 for generation of new IDs that are expected to be used via Activitypub
-	// They are shorter than the main method used (uuid v4) but should still provide enough
-	// uniqueness such that collisions are not to be expected.
+	// Set the provider for ID generation.
+	// Default is "xid".
+	// Options are "uuid", "cuid" and "xid"
 	// Changing this option will only affect new ID generations, not update existing ones
 	// As of now, even that doesn't work due to implementation details
-	UseCuid2Ids bool `toml:"use_cuid2_ids"`
+	IdGenerator string `toml:"id_generator"`
 }
 
 type Config struct {
@@ -220,6 +221,7 @@ var defaultConfig Config = Config{
 	Experimental: ConfigExperimental{
 		UseEd25519Keys:          false,
 		AuthFetchForServerActor: false,
+		IdGenerator:             "xid",
 	},
 }
 
@@ -322,6 +324,7 @@ func ReadAndWriteToGlobal(fileName string) error {
 		log.Error().Err(err).Bytes("config-data-raw", data).Msg("Failed to unmarshal config file")
 		return err
 	}
+	config.Experimental.IdGenerator = strings.ToLower(config.Experimental.IdGenerator)
 	GlobalConfig = config
 	log.Info().Str("config-file", fileName).Msg("Read and applied config file")
 	return nil