util/sets.go: Use generics Sets

server/db/database.go

@@ -32,8 +32,8 @@ const (
 
 // User represents a user in the database.
 type User struct {
-	ID          string         `json:"id"`
-	Permissions util.StringSet `json:"permissions"`
+	ID          string           `json:"id"`
+	Permissions util.Set[string] `json:"permissions"`
 
 	// passwordSaltHash string
 }
@@ -122,7 +122,7 @@ type Database interface {
 	GetRoomOccupiedSeats(roomID string) ([]string, error)
 	GetRoomFreeSeats(roomID string) ([]string, error)
 
-	GetUserSeats(userID string) (util.StringSet, error)
+	GetUserSeats(userID string) (util.Set[string], error)
 
 	OccupySeat(seatID, userID string) error
 	FreeSeat(seatID string) error
@@ -161,12 +161,12 @@ func NewInMemoryStore() Database {
 
 	db.users["aziis98"] = &User{
 		ID:          "aziis98",
-		Permissions: util.NewStringSet(PermissionAdmin),
+		Permissions: util.NewSet[string](PermissionAdmin),
 	}
 
 	db.users["bachoseven"] = &User{
 		ID:          "bachoseven",
-		Permissions: util.NewStringSet(PermissionAdmin),
+		Permissions: util.NewSet[string](PermissionAdmin),
 	}
 
 	return db

server/db/inmemory.go

@@ -146,14 +146,14 @@ func (db *memDB) GetRoomFreeSeats(roomID string) ([]string, error) {
 	return seats, nil
 }
 
-func (db *memDB) GetUserSeats(userID string) (util.StringSet, error) {
+func (db *memDB) GetUserSeats(userID string) (util.Set[string], error) {
 	for _, seat := range db.seats {
 		if len(seat.OccupiedBy) > 0 && seat.OccupiedBy[0] == userID {
-			return util.NewStringSet(seat.ID), nil
+			return util.NewSet[string](seat.ID), nil
 		}
 	}
 
-	return util.NewStringSet(), nil
+	return util.NewSet[string](), nil
 }
 
 func (db *memDB) OccupySeat(seatID, userID string) error {