fix crash on newer neoforge version

closes #29

build.gradle

@@ -6,24 +6,13 @@ import javax.xml.parsers.DocumentBuilderFactory
 import java.nio.ByteBuffer
 import java.nio.charset.StandardCharsets
 
-//buildscript {
-//    apply from: 'https://moddingx.github.io/ModUtils/v5/buildscript.gradle', to: buildscript
-//}
-//
-//apply from: 'https://moddingx.github.io/ModUtils/v5/mod.gradle'
-//apply plugin: 'org.moddingx.modgradle.cursedep'
-//
-//dependencies {
-//    implementation curse.mod(325235, 4886408)
-//}
-
 plugins {
     id 'java-library'
     id 'idea'
     id 'maven-publish'
     id 'net.darkhax.curseforgegradle' version '1.1.18'
     id 'com.modrinth.minotaur' version '2.+'
-    id 'net.neoforged.moddev' version '0.1.94'
+    id 'net.neoforged.moddev' version '[0.1,0.2)'
 }
 
 version = getVersion(minecraft_version + "-" + base_version, new URL(remote_maven + "/" + group.replace('.', '/') + "/" + name + "/maven-metadata.xml"))

gradle.properties

@@ -5,13 +5,13 @@ org.gradle.caching=true
 org.gradle.configuration-cache=true
 
 ## Mappings
-parchment_minecraft_version=1.20.6
-parchment_mappings_version=2024.06.02
+parchment_minecraft_version=1.21
+parchment_mappings_version=2024.06.23
 
 ## Loader Properties
 minecraft_version=1.21
-neo_version=21.0.0-beta
-loader_version_range=[2,)
+neo_version=21.0.31-beta
+loader_version_range=[4,)
 
 ## Mod Properties
 modid=simplebackups

src/main/java/de/melanx/simplebackups/EventListener.java

@@ -7,8 +7,8 @@
 import de.melanx.simplebackups.config.ServerConfig;
 import de.melanx.simplebackups.network.Pause;
 import net.minecraft.commands.Commands;
+import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.ServerPlayer;
-import net.minecraft.world.level.Level;
 import net.neoforged.bus.api.SubscribeEvent;
 import net.neoforged.neoforge.event.RegisterCommandsEvent;
 import net.neoforged.neoforge.event.entity.player.PlayerEvent;
@@ -31,9 +31,7 @@ public void registerCommands(RegisterCommandsEvent event) {
 
     @SubscribeEvent
     public void onServerTick(LevelTickEvent.Post event) {
-        //noinspection ConstantConditions
-        Level level = event.getLevel();
-        if (!level.isClientSide
+        if (event.getLevel() instanceof ServerLevel level && !level.isClientSide
                 && level.getGameTime() % 20 == 0 && level == level.getServer().overworld()) {
             if (!level.getServer().getPlayerList().getPlayers().isEmpty() || this.doBackup || CommonConfig.doNoPlayerBackups()) {
                 this.doBackup = false;

src/main/resources/META-INF/accesstransformer.cfg

@@ -1,3 +1,4 @@
 public net.minecraft.server.MinecraftServer storageSource
+public net.minecraft.server.network.ServerCommonPacketListenerImpl connection
 public net.minecraft.world.level.storage.LevelStorageSource$LevelStorageAccess checkLock()V
 public net.minecraft.world.level.storage.LevelStorageSource$LevelStorageAccess levelId