From 7efbe8220f7138837c5d735f3aba926441892c61 Mon Sep 17 00:00:00 2001
From: Auxilor <will@willfp.com>
Date: Thu, 8 Apr 2021 00:18:46 +0100
Subject: [PATCH] Added Rebounding

---
 .../ecoenchants/enchantments/EcoEnchants.java |  2 +
 .../ecoenchants/normal/Rebounding.java        | 63 +++++++++++++++++++
 .../resources/enchants/normal/rebounding.yml  | 27 ++++++++
 3 files changed, 92 insertions(+)
 create mode 100644 eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Rebounding.java
 create mode 100644 eco-core/core-plugin/src/main/resources/enchants/normal/rebounding.yml

diff --git a/eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/enchantments/EcoEnchants.java b/eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/enchantments/EcoEnchants.java
index 60fa5ea5..1f3ca5e2 100644
--- a/eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/enchantments/EcoEnchants.java
+++ b/eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/enchantments/EcoEnchants.java
@@ -161,6 +161,7 @@ import com.willfp.ecoenchants.enchantments.ecoenchants.normal.Radiance;
 import com.willfp.ecoenchants.enchantments.ecoenchants.normal.Rage;
 import com.willfp.ecoenchants.enchantments.ecoenchants.normal.Rapid;
 import com.willfp.ecoenchants.enchantments.ecoenchants.normal.Reaper;
+import com.willfp.ecoenchants.enchantments.ecoenchants.normal.Rebounding;
 import com.willfp.ecoenchants.enchantments.ecoenchants.normal.Reel;
 import com.willfp.ecoenchants.enchantments.ecoenchants.normal.Reinforcement;
 import com.willfp.ecoenchants.enchantments.ecoenchants.normal.Rejuvenation;
@@ -489,6 +490,7 @@ public class EcoEnchants {
     public static final EcoEnchant SWEEP_ARTIFACT = new SweepArtifact();
     public static final EcoEnchant REAPER = new Reaper();
     public static final EcoEnchant WOOD_SWITCHER = new WoodSwitcher();
+    public static final EcoEnchant REBOUNDING = new Rebounding();
 
     /**
      * Get all registered {@link EcoEnchant}s.
diff --git a/eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Rebounding.java b/eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Rebounding.java
new file mode 100644
index 00000000..4e23c9cc
--- /dev/null
+++ b/eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Rebounding.java
@@ -0,0 +1,63 @@
+package com.willfp.ecoenchants.enchantments.ecoenchants.normal;
+
+import com.willfp.eco.util.VectorUtils;
+import com.willfp.ecoenchants.enchantments.EcoEnchant;
+import com.willfp.ecoenchants.enchantments.EcoEnchants;
+import com.willfp.ecoenchants.enchantments.meta.EnchantmentType;
+import com.willfp.ecoenchants.enchantments.util.EnchantChecks;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.entity.EntityDamageByEntityEvent;
+import org.bukkit.util.Vector;
+import org.jetbrains.annotations.NotNull;
+
+public class Rebounding extends EcoEnchant {
+    public Rebounding() {
+        super(
+                "rebounding", EnchantmentType.NORMAL
+        );
+    }
+
+    @EventHandler
+    public void onDamage(@NotNull final EntityDamageByEntityEvent event) {
+        if (!(event.getEntity() instanceof LivingEntity)) {
+            return;
+        }
+
+        if (!(event.getDamager() instanceof LivingEntity)) {
+            return;
+        }
+
+        if (event.isCancelled()) {
+            return;
+        }
+
+        LivingEntity victim = (LivingEntity) event.getEntity();
+        LivingEntity attacker = (LivingEntity) event.getDamager();
+
+        int level = EnchantChecks.getArmorPoints(attacker, this);
+
+        if (level == 0) {
+            return;
+        }
+
+        if (this.getDisabledWorlds().contains(attacker.getWorld())) {
+            return;
+        }
+
+        Vector vector = attacker.getLocation().toVector().clone().subtract(victim.getLocation().toVector()).normalize()
+                .multiply((-level * (this.getConfig().getDouble(EcoEnchants.CONFIG_LOCATION + "velocity-multiplier") - 1)) + 1);
+
+        if (!VectorUtils.isFinite(vector)) {
+            return;
+        }
+
+        vector.setY(0.2);
+
+        if (!VectorUtils.isFinite(vector)) {
+            return;
+        }
+
+        attacker.setVelocity(vector);
+    }
+}
diff --git a/eco-core/core-plugin/src/main/resources/enchants/normal/rebounding.yml b/eco-core/core-plugin/src/main/resources/enchants/normal/rebounding.yml
new file mode 100644
index 00000000..37eaeb98
--- /dev/null
+++ b/eco-core/core-plugin/src/main/resources/enchants/normal/rebounding.yml
@@ -0,0 +1,27 @@
+#
+# Rebounding EcoEnchant
+#
+
+name: "Rebounding"
+description: Deal knockback to entities that attack you.
+enabled: true
+
+obtaining:
+  table: true
+  villager: true
+  loot: true
+  rarity: epic
+
+general-config:
+  targets:
+    - helmet
+    - chestplate
+    - leggings
+    - boots
+  grindstoneable: true
+  disabled-in-worlds: [ ]
+  conflicts: [ ]
+  maximum-level: 2
+
+config:
+  velocity-multiplier: 1.2