From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Encode42 <me@encode42.dev>
Date: Tue, 11 May 2021 21:00:53 -0400
Subject: [PATCH] Implement Mob Blindness

Ported from https://github.com/raltsmc/mobblindness

diff --git a/src/main/java/net/minecraft/world/entity/EntityLiving.java b/src/main/java/net/minecraft/world/entity/EntityLiving.java
index cb18f3c88a0b8ef374cbcf4226848e1541bc8675..9e0c00bf0c1fb41d09de39d2a3831b6bc6658259 100644
--- a/src/main/java/net/minecraft/world/entity/EntityLiving.java
+++ b/src/main/java/net/minecraft/world/entity/EntityLiving.java
@@ -925,6 +925,18 @@ public abstract class EntityLiving extends Entity {
                 // Airplane end
                 d0 *= 0.5D;
             }
+
+            // Purpur start
+            if (entity instanceof EntityLiving) {
+                EntityLiving livingEntity = (EntityLiving) entity;
+                if (livingEntity.hasEffect(MobEffects.BLINDNESS)) {
+                    int amplifier = livingEntity.getEffect(MobEffects.BLINDNESS).getAmplifier();
+                    for (int i = 0; i < amplifier; i++) {
+                        d0 *= world.purpurConfig.mobsBlindnessMultiplier;
+                    }
+                }
+            }
+            // Purpur end
         }
 
         return d0;
diff --git a/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java b/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
index 07c66f9d41e7a74021dde6702d654710e400e93b..b8622f687b4fd70aaee5fa44cc50b8ee38582582 100644
--- a/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
+++ b/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
@@ -542,6 +542,11 @@ public class PurpurWorldConfig {
         mobsSpawnOnBlueIce = getBoolean("blocks.blue_ice.allow-mob-spawns", mobsSpawnOnBlueIce);
     }
 
+    public double mobsBlindnessMultiplier = 1;
+    private void blindnessSettings() {
+        mobsBlindnessMultiplier = getDouble("gameplay-mechanics.entity-blindness-multiplier", mobsBlindnessMultiplier);
+    }
+
     public boolean chestOpenWithBlockOnTop = false;
     private void chestSettings() {
         chestOpenWithBlockOnTop = getBoolean("blocks.chest.open-with-solid-block-on-top", chestOpenWithBlockOnTop);