Fix Mob Spawner logic with CustomSpawnRules. Closes #8398

src/main/java/net/minecraftforge/event/ForgeEventFactory.java

@@ -204,6 +204,7 @@ public class ForgeEventFactory
         return event.getResult();
     }
 
+    @Deprecated(forRemoval = true, since = "1.18.1")
     public static boolean canEntitySpawnSpawner(Mob entity, Level world, float x, float y, float z, BaseSpawner spawner)
     {
         Result result = canEntitySpawn(entity, world, x, y, z, spawner, MobSpawnType.SPAWNER);
@@ -213,7 +214,12 @@ public class ForgeEventFactory
             return result == Result.ALLOW;
     }
 
+    @Deprecated(forRemoval = true, since = "1.18.1")
     public static boolean doSpecialSpawn(Mob entity, Level world, float x, float y, float z, BaseSpawner spawner, MobSpawnType spawnReason)
+    {
+        return doSpecialSpawn(entity, (LevelAccessor)world, x, y, z, spawner, spawnReason);
+    }
+    public static boolean doSpecialSpawn(Mob entity, LevelAccessor world, float x, float y, float z, BaseSpawner spawner, MobSpawnType spawnReason)
     {
         return MinecraftForge.EVENT_BUS.post(new LivingSpawnEvent.SpecialSpawn(entity, world, x, y, z, spawner, spawnReason));
     }
@@ -255,7 +261,7 @@ public class ForgeEventFactory
         MinecraftForge.EVENT_BUS.post(event);
         return event.getDisplayname();
     }
-    
+
     public static Component getPlayerTabListDisplayName(Player player)
     {
         PlayerEvent.TabListNameFormat event = new PlayerEvent.TabListNameFormat(player);

src/main/java/net/minecraftforge/event/entity/living/LivingSpawnEvent.java

@@ -118,7 +118,7 @@ public class LivingSpawnEvent extends LivingEvent
      * SpecialSpawn is fired when an Entity is to be spawned.<br>
      * This allows you to do special inializers in the new entity.<br>
      * <br>
-     * This event is fired via the {@link ForgeEventFactory#doSpecialSpawn(Mob, Level, float, float, float, BaseSpawner, MobSpawnType)}.<br>
+     * This event is fired via the {@link ForgeEventFactory#doSpecialSpawn(Mob, LevelAccessor, float, float, float, BaseSpawner, MobSpawnType)}.<br>
      * <br>
      * This event is {@link net.minecraftforge.eventbus.api.Cancelable}.<br>
      * If this event is canceled, the Entity is not spawned.<br>
@@ -137,7 +137,13 @@ public class LivingSpawnEvent extends LivingEvent
         /**
          * @param spawner the position of a tileentity or approximate position of an entity that initiated the spawn if any
          */
+        @Deprecated(forRemoval = true, since = "1.18.1")
         public SpecialSpawn(Mob entity, Level world, double x, double y, double z, @Nullable BaseSpawner spawner, MobSpawnType spawnReason)
+        {
+            this(entity, (LevelAccessor)world, x, y, z, spawner, spawnReason);
+        }
+
+        public SpecialSpawn(Mob entity, LevelAccessor world, double x, double y, double z, @Nullable BaseSpawner spawner, MobSpawnType spawnReason)
         {
             super(entity, world, x, y, z);
             this.spawner = spawner;