Force players to be mountable inside replay

build.gradle

@@ -64,7 +64,7 @@ dependencies {
 
 	include(implementation("com.moulberry:mixinconstraints:1.0.1"))
 
-    modCompileOnly(rootProject.files('deps/DistantHorizons-2.3.0-b-RC2-1.21.4-neoforge-fabric.jar'))
+    modCompileOnly(rootProject.files('deps/DistantHorizons-2.3.0-b-RC3-1.21.4-neoforge-fabric.jar'))
 
     modCompileOnly("maven.modrinth:sodium:RncWhTxD")
     modCompileOnly("maven.modrinth:iris:kuOV4Ece")

src/main/java/com/moulberry/flashback/mixin/playback/MixinEntity.java

@@ -1,20 +1,19 @@
 package com.moulberry.flashback.mixin.playback;
 
+import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
+import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
 import com.moulberry.flashback.Flashback;
 import com.moulberry.flashback.playback.ReplayServer;
 import com.moulberry.flashback.state.EditorState;
 import com.moulberry.flashback.state.EditorStateManager;
 import net.minecraft.client.Minecraft;
-import net.minecraft.client.multiplayer.ClientLevel;
-import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.level.Level;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
 
 import java.util.UUID;
@@ -34,6 +33,15 @@ public abstract class MixinEntity {
     @Shadow
     public abstract UUID getUUID();
 
+    // Force entities to be able to ride players on servers
+    @WrapOperation(method = "startRiding(Lnet/minecraft/world/entity/Entity;Z)Z", at = @At(value = "INVOKE", target = "Lnet/minecraft/world/level/Level;isClientSide()Z"))
+    public boolean startRiding_isClientSide(Level instance, Operation<Boolean> original) {
+        if (Flashback.isInReplay()) {
+            return true; // Always pretend we're clientside so mounting players is allowed
+        }
+        return original.call(instance);
+    }
+
     @Inject(method = "isInvisibleTo", at = @At("HEAD"), cancellable = true)
     public void isInvisibleTo(Player player, CallbackInfoReturnable<Boolean> cir) {
         ReplayServer replayServer = Flashback.getReplayServer();