Experimental - new property active_effect - allow/deny having certain mob effects in an area

Author: 3TUSK

src/main/java/org/teacon/areacontrol/AreaControlConfig.java

@@ -21,6 +21,7 @@ public class AreaControlConfig {
     public static ModConfigSpec.BooleanValue allowCBSelectingFromParent;
     public static ModConfigSpec.BooleanValue allowCBSelectingFromChild;
     public static ModConfigSpec.BooleanValue allowOpenSafe;
+    public static ModConfigSpec.BooleanValue allowActiveEffect;
 
     public static ModConfigSpec setup(ModConfigSpec.Builder configSpec) {
         disableInSinglePlayer = configSpec.comment("Disable nearly all protection measures when in singleplayer.")
@@ -96,6 +97,8 @@ public static ModConfigSpec setup(ModConfigSpec.Builder configSpec) {
                 .define("allowCommandBlockUseEntitySelectorToSelectEntitiesFromChildArea", true);
         allowOpenSafe = configSpec.comment("Default value for open_safe")
                 .define("allowOpenSafe", true);
+        allowActiveEffect = configSpec.comment("Default value for active_effect")
+                .define("allowActiveEffect", true);
         configSpec.pop();
         return configSpec.build();
     }

src/main/java/org/teacon/areacontrol/AreaControlPlayerTracker.java

@@ -2,13 +2,15 @@
 
 import net.minecraft.ChatFormatting;
 
+import net.minecraft.core.Holder;
 import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.network.chat.ClickEvent;
 import net.minecraft.network.chat.Component;
 import net.minecraft.network.chat.HoverEvent;
 import net.minecraft.network.chat.Style;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.world.effect.MobEffect;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.level.Level;
@@ -18,6 +20,7 @@
 import net.neoforged.neoforge.event.tick.PlayerTickEvent;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.jspecify.annotations.NonNull;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.slf4j.Marker;
@@ -33,6 +36,7 @@
 
 import java.util.ArrayList;
 import java.util.Iterator;
+import java.util.List;
 import java.util.Set;
 import java.util.UUID;
 
@@ -108,6 +112,18 @@ public static void onPlayerTick(PlayerTickEvent.Pre event) {
                 player.sendOverlayMessage(Component.translatable("area_control.notice.ride_disabled", riding.getDisplayName()));
                 player.stopRiding();
             }
+            // Clear disallowed effects
+            for (Holder<@NonNull MobEffect> effectId : List.copyOf(player.getActiveEffectsMap().keySet())) {
+                var regKey = effectId.getKey();
+                if (regKey == null) {
+                    // This is impossible - no effect should lack registry id at runtime, unless it is unregistered.
+                    continue;
+                }
+                if (!AreaChecks.checkPropFor(currentArea, player, AreaProperties.ALLOW_ACTIVE_EFFECT, regKey.identifier(), AreaControlConfig.allowActiveEffect)) {
+                    player.removeEffect(effectId);
+                    player.sendOverlayMessage(Component.translatable("area_control.notice.clear_effect", effectId.value().getDisplayName()));
+                }
+            }
 
             // 检查玩家的 Bypass 状态并更新。
             INSTANCE.updatePlayerExemptionStatus(player, status, prevArea);

src/main/java/org/teacon/areacontrol/api/AreaProperties.java

@@ -37,6 +37,7 @@ public final class AreaProperties {
     public static final String ALLOW_EXPLOSION_AFFECT_ENTITIES = register("explosion_affect_entities");
     public static final String ALLOW_FIRE_SPREAD = register("fire_spread");
     public static final String ALLOW_OPEN_SAFE = register("open_safe");
+    public static final String ALLOW_ACTIVE_EFFECT = register("active_effect");
 
     public static final String ALLOW_ENTITY_USE_SELECTOR_FROM_CHILD = register("select_from_child_area_by_entity");
     public static final String ALLOW_ENTITY_USE_SELECTOR_FROM_PARENT = register("select_from_parent_area_by_entity");

src/main/resources/assets/area_control/lang/en_us.json

@@ -146,6 +146,7 @@
   "area_control.notice.ride_disabled": "AreaControl: riding %s is disabled here; turn on bypass mode if you own this area",
   "area_control.notice.selector_filtered": "%s entity/entities that were matched by selector are excluded by AreaControl due to area restrictions.",
   "area_control.notice.open_safe_disabled": "AreaControl: You cannot open safe here",
+  "area_control.notice.clear_effect": "AreaControl: this area bans effect '%s' and has been cleared for you",
 
   "area_control.error.must_be_player": "This command requires a real player to execute",
   "area_control.error.no_client_ext": "This function requires AreaControl to be installed on client.",

src/main/resources/assets/area_control/lang/zh_cn.json

@@ -145,6 +145,7 @@
   "area_control.notice.ride_disabled": "AreaControl：该地禁止骑乘 %s；如果你是该地建筑师，请打开 Bypass 模式",
   "area_control.notice.selector_filtered": "AreaControl 已根据领地检查排除了 %s 个实体选择器此前选中的实体。",
   "area_control.notice.open_safe_disabled": "AreaControl：你不能在这里打开保险箱！",
+  "area_control.notice.clear_effect": "AreaControl：该领地禁止状态效果「%s」，现已清除。",
 
   "area_control.error.must_be_player": "只有玩家可以执行该命令。",
   "area_control.error.no_client_ext": "该功能需要客户端也安装 AreaControl 才能使用。",