mcmod.post.5010.fix.js

/**
 * @typedef {{armors: $Item_[], bonus: [mobEffect: Special.MobEffect, amplifier: number?, showParticles: boolean?]}} $ArmorSetBonus_
 * @type {Object.<String, $ArmorSetBonus_}
 */
const bonuses = {
  set1: {
    armors: ["minecraft:leather_helmet", "minecraft:leather_boots"],
    bonus: ["speed", 0],
  },
  set2: {
    armors: ["minecraft:diamond_leggings"],
    bonus: ["glowing", 0, true],
  },
  set3: {
    armors: ["minecraft:diamond_chestplate"],
    bonus: ["regeneration", 1, true],
  },
};

function armor_set_bonus(/**@type {$ContextUtils$EntityEquipmentContext_}*/ context) {
  const { entity, previousStack, currentStack } = context;
  const { potionEffects, armorSlots } = entity;

  /** @type {Special.Item[]} */
  const now_set = armorSlots.toArray().map((i) => i.id);
  /** @type {Special.Item[]} */
  const last_set = armorSlots.toArray().map((i) => (i.id === currentStack.id ? previousStack.id : i.id));

  Object.entries(bonuses).forEach((/**@type {[String, $ArmorSetBonus_]}*/ [key, data]) => {
    let {
      armors,
      bonus: [mobEffect, amplifier, showParticles],
    } = data;

    // 移除旧的套装奖励
    if (!armors.every((item) => last_set.includes(item))) entity.removeEffect(mobEffect);

    // 添加新的套装奖励
    if (armors.every((item) => now_set.includes(item)))
      // -1 表示永久效果
      potionEffects.add(mobEffect, -1, amplifier ?? 0, true, showParticles ?? false);
  });
}

EntityJSEvents.modifyEntity((event) =>
  event.modify("minecraft:player", (modifyBuilder) => {
    modifyBuilder.onEquipItem((context) => armor_set_bonus(context));
  })
);