Replace ServerLifecycleEvents usage with mixin

Author: embeddedt

fabric/src/main/java/org/embeddedt/modernfix/ModernFixFabric.java

@@ -1,7 +1,6 @@
 package org.embeddedt.modernfix;
 
 import net.fabricmc.api.ModInitializer;
-import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
 import net.minecraft.server.MinecraftServer;
 
 import java.lang.ref.WeakReference;
@@ -13,16 +12,6 @@ public class ModernFixFabric implements ModInitializer {
     public void onInitialize() {
         commonMod = new ModernFix();
 
-        ServerLifecycleEvents.SERVER_STARTING.register(server -> {
-            theServer = new WeakReference<>(server);
-        });
-        ServerLifecycleEvents.SERVER_STARTED.register(server -> {
-            commonMod.onServerStarted();
-        });
-        ServerLifecycleEvents.SERVER_STOPPED.register(server -> {
-            commonMod.onServerDead(server);
-        });
-
         // TODO: implement entity ID desync
     }
 

fabric/src/main/java/org/embeddedt/modernfix/fabric/mixin/core/MinecraftServerMixin.java

@@ -0,0 +1,29 @@
+package org.embeddedt.modernfix.fabric.mixin.core;
+
+import net.minecraft.server.MinecraftServer;
+import org.embeddedt.modernfix.ModernFix;
+import org.embeddedt.modernfix.ModernFixFabric;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.lang.ref.WeakReference;
+
+@Mixin(MinecraftServer.class)
+public class MinecraftServerMixin {
+    @Inject(method = "runServer", at = @At("HEAD"))
+    private void changeServerReference(CallbackInfo ci) {
+        ModernFixFabric.theServer = new WeakReference<>((MinecraftServer)(Object)this);
+    }
+
+    @Inject(method = "runServer", at = @At(value = "INVOKE", target = "Lnet/minecraft/Util;getMillis()J", ordinal = 0))
+    private void hookServerStarted(CallbackInfo ci) {
+        ModernFix.INSTANCE.onServerStarted();
+    }
+
+    @Inject(method = "stopServer", at = @At("RETURN"))
+    private void hookServerShutdown(CallbackInfo ci) {
+        ModernFix.INSTANCE.onServerDead((MinecraftServer)(Object)this);
+    }
+}