#1014: Add PotionEffectTypeCategory to distinguish between beneficial and harmful effects

src/main/java/org/bukkit/potion/PotionEffectType.java

@@ -249,6 +249,14 @@ public abstract class PotionEffectType implements Keyed, Translatable {
      */
     public abstract boolean isInstant();
 
+    /**
+     * Returns the {@link PotionEffectTypeCategory category} of this effect type.
+     *
+     * @return the category
+     */
+    @NotNull
+    public abstract PotionEffectTypeCategory getCategory();
+
     /**
      * Returns the color of this effect type.
      *

src/main/java/org/bukkit/potion/PotionEffectTypeCategory.java

@@ -0,0 +1,24 @@
+package org.bukkit.potion;
+
+/**
+ * Represents a category of {@link PotionEffectType} and its effect on an entity.
+ */
+public enum PotionEffectTypeCategory {
+
+    /**
+     * Beneficial effects that positively impact an entity, such as Regeneration,
+     * Absorption, or Fire Resistance.
+     */
+    BENEFICIAL,
+    /**
+     * Harmful effects that negatively impact an entity, such as Blindness, Wither,
+     * or Levitation.
+     */
+    HARMFUL,
+    /**
+     * Neutral effects that have neither a positive nor negative effect on an
+     * entity, such as Glowing or Bad Omen.
+     */
+    NEUTRAL;
+
+}