feat: offlineFakePlayers

src/main/java/com/github/zly2006/carpetslsaddition/SLSCarpetSettings.java

@@ -60,6 +60,9 @@ public class SLSCarpetSettings {
     @Rule(categories = {SLSA, RuleCategory.FEATURE})
     public static boolean armadilloImmediateDespawns = false;
 
+    @Rule(categories = {SLSA, RuleCategory.FEATURE})
+    public static boolean offlineFakePlayers = false;
+
     @Rule(categories = {SLSA, RuleCategory.FEATURE})
     public static int netherPortalSize = 21;
 }

src/main/java/com/github/zly2006/carpetslsaddition/mixin/carpet/MixinPlayerCommand.java

@@ -0,0 +1,27 @@
+package com.github.zly2006.carpetslsaddition.mixin.carpet;
+
+import carpet.commands.PlayerCommand;
+import com.github.zly2006.carpetslsaddition.SLSCarpetSettings;
+import com.mojang.authlib.GameProfile;
+import net.minecraft.util.UserCache;
+import net.minecraft.util.Uuids;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+import java.util.Optional;
+
+@Mixin(PlayerCommand.class)
+public abstract class MixinPlayerCommand {
+
+    @Redirect(
+            method = "cantSpawn",
+            at = @At(value = "INVOKE", target = "Lnet/minecraft/util/UserCache;findByName(Ljava/lang/String;)Ljava/util/Optional;")
+    )
+    private static Optional<GameProfile> redirectFindByName(UserCache instance, String playerName) {
+        if (SLSCarpetSettings.offlineFakePlayers) {
+            return Optional.of(Uuids.getOfflinePlayerProfile(playerName));
+        } else {
+            return instance.findByName(playerName);
+        }
+    }
+}