Purpur/patches/server/0129-Dont-run-with-scissors.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: JustDoom <justdoomdev@gmail.com>
Date: Fri, 5 Mar 2021 14:23:16 -0500
Subject: [PATCH] Dont run with scissors!

inspired by https://modrinth.com/mod/dont-run-with-scissors

diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index bbec4b963ca4b0804bce0c4cde49e1e88c0ae9f0..b7f8499cabbd28c0679d0c775b009c9cdf53b5f8 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -1654,6 +1654,13 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
                                     this.player.tryResetCurrentImpulseContext();
                                 }
 
+                                // Purpur Start
+                                if (this.player.level().purpurConfig.dontRunWithScissors && this.player.isSprinting() && !(this.player.level().purpurConfig.ignoreScissorsInWater && this.player.isInWater()) && !(this.player.level().purpurConfig.ignoreScissorsInLava && this.player.isInLava()) && (isScissor(this.player.getItemInHand(InteractionHand.MAIN_HAND)) || isScissor(this.player.getItemInHand(InteractionHand.OFF_HAND))) && (int) (Math.random() * 10) == 0) {
+                                    this.player.hurt(this.player.damageSources().scissors(), (float) this.player.level().purpurConfig.scissorsRunningDamage);
+                                    if (!org.purpurmc.purpur.PurpurConfig.dontRunWithScissors.isBlank()) this.player.sendActionBarMessage(org.purpurmc.purpur.PurpurConfig.dontRunWithScissors);
+                                }
+                                // Purpur End
+
                                 this.player.checkMovementStatistics(this.player.getX() - d3, this.player.getY() - d4, this.player.getZ() - d5);
                                 this.lastGoodX = this.player.getX();
                                 this.lastGoodY = this.player.getY();
@@ -1681,6 +1688,14 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
         }
     }
 
+    // Purpur start
+    public boolean isScissor(ItemStack stack) {
+        if (!stack.is(Items.SHEARS)) return false;
+        net.minecraft.world.item.component.CustomModelData customModelData = stack.get(net.minecraft.core.component.DataComponents.CUSTOM_MODEL_DATA);
+        return customModelData == null || customModelData.value() == 0;
+    }
+    // Purpur end
+
     // Paper start - optimise out extra getCubes
     private boolean hasNewCollision(final ServerLevel world, final Entity entity, final AABB oldBox, final AABB newBox) {
         final List<AABB> collisionsBB = new java.util.ArrayList<>();
diff --git a/src/main/java/net/minecraft/world/damagesource/CombatTracker.java b/src/main/java/net/minecraft/world/damagesource/CombatTracker.java
index 99a7e9eb75231c15bd8bb24fbb4e296bc9fdedff..a375d40ec6365ba8704ba3ece22dd5b2de9857b5 100644
--- a/src/main/java/net/minecraft/world/damagesource/CombatTracker.java
+++ b/src/main/java/net/minecraft/world/damagesource/CombatTracker.java
@@ -98,6 +98,11 @@ public class CombatTracker {
                 Component component = ComponentUtils.wrapInSquareBrackets(Component.translatable(string + ".link")).withStyle(INTENTIONAL_GAME_DESIGN_STYLE);
                 return Component.translatable(string + ".message", this.mob.getDisplayName(), component);
             } else {
+                // Purpur start
+                if (damageSource.isScissors()) {
+                    return damageSource.getLocalizedDeathMessage(org.purpurmc.purpur.PurpurConfig.deathMsgRunWithScissors, this.mob);
+                }
+                // Purpur end
                 return damageSource.getLocalizedDeathMessage(this.mob);
             }
         }
diff --git a/src/main/java/net/minecraft/world/damagesource/DamageSource.java b/src/main/java/net/minecraft/world/damagesource/DamageSource.java
index c83e80ebdbbfb2d0e08561a44486a308d16f50af..aa65f4bf60172a2629daf6e15f7f48d29b250ee0 100644
--- a/src/main/java/net/minecraft/world/damagesource/DamageSource.java
+++ b/src/main/java/net/minecraft/world/damagesource/DamageSource.java
@@ -29,6 +29,7 @@ public class DamageSource {
     private boolean sweep = false;
     private boolean melting = false;
     private boolean poison = false;
+    private boolean scissors = false; // Purpur
     @Nullable
     private Entity customEventDamager = null; // This field is a helper for when causing entity damage is not set by vanilla // Paper - fix DamageSource API
 
@@ -59,6 +60,17 @@ public class DamageSource {
         return this.poison;
     }
 
+    // Purpur start
+    public DamageSource scissors() {
+        this.scissors = true;
+        return this;
+    }
+
+    public boolean isScissors() {
+        return this.scissors;
+    }
+    // Purpur end
+
     // Paper start - fix DamageSource API
     @Nullable
     public Entity getCustomEventDamager() {
@@ -117,6 +129,7 @@ public class DamageSource {
         damageSource.sweep = this.isSweep();
         damageSource.poison = this.isPoison();
         damageSource.melting = this.isMelting();
+        damageSource.scissors = this.isScissors(); // Purpur
         return damageSource;
     }
     // CraftBukkit end
diff --git a/src/main/java/net/minecraft/world/damagesource/DamageSources.java b/src/main/java/net/minecraft/world/damagesource/DamageSources.java
index e34584e4780f343d6c946af5377088d53818e88e..da790aac3bd8981f351b7e241015ff42bd0da73b 100644
--- a/src/main/java/net/minecraft/world/damagesource/DamageSources.java
+++ b/src/main/java/net/minecraft/world/damagesource/DamageSources.java
@@ -45,11 +45,13 @@ public class DamageSources {
     // CraftBukkit start
     private final DamageSource melting;
     private final DamageSource poison;
+    private final DamageSource scissors; // Purpur
 
     public DamageSources(RegistryAccess registryManager) {
         this.damageTypes = registryManager.registryOrThrow(Registries.DAMAGE_TYPE);
         this.melting = this.source(DamageTypes.ON_FIRE).melting();
         this.poison = this.source(DamageTypes.MAGIC).poison();
+        this.scissors = this.source(DamageTypes.MAGIC).scissors(); // Purpur
         // CraftBukkit end
         this.inFire = this.source(DamageTypes.IN_FIRE);
         this.campfire = this.source(DamageTypes.CAMPFIRE);
@@ -99,6 +101,12 @@ public class DamageSources {
     }
     // CraftBukkit end
 
+    // Purpur start
+    public DamageSource scissors() {
+        return this.scissors;
+    }
+    // Purpur end
+
     public DamageSource inFire() {
         return this.inFire;
     }
diff --git a/src/main/java/org/purpurmc/purpur/PurpurConfig.java b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
index fb9f03ec90e5e5ed17886dc4e6443bd7b7d1fe32..50e8d2d54ce383f8c569ff2688c65b2a2db9f896 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
@@ -185,6 +185,7 @@ public class PurpurConfig {
     public static String demoCommandOutput = "<green>%s has been shown the demo screen";
     public static String pingCommandOutput = "<green>%s's ping is %sms";
     public static String tpsbarCommandOutput = "<green>Tpsbar toggled <onoff> for <target>";
+    public static String dontRunWithScissors = "<red><italic>Don't run with scissors!";
     private static void messages() {
         cannotRideMob = getString("settings.messages.cannot-ride-mob", cannotRideMob);
         afkBroadcastAway = getString("settings.messages.afk-broadcast-away", afkBroadcastAway);
@@ -196,6 +197,12 @@ public class PurpurConfig {
         demoCommandOutput = getString("settings.messages.demo-command-output", demoCommandOutput);
         pingCommandOutput = getString("settings.messages.ping-command-output", pingCommandOutput);
         tpsbarCommandOutput = getString("settings.messages.tpsbar-command-output", tpsbarCommandOutput);
+        dontRunWithScissors = getString("settings.messages.dont-run-with-scissors", dontRunWithScissors);
+    }
+
+    public static String deathMsgRunWithScissors = "<player> slipped and fell on their shears";
+    private static void deathMessages() {
+        deathMsgRunWithScissors = getString("settings.messages.death-message.run-with-scissors", deathMsgRunWithScissors);
     }
 
     public static String serverModName = io.papermc.paper.ServerBuildInfo.buildInfo().brandName();
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index abd4e0b1b81c6071cba1d057732f594d53c184f3..8679ba225faac9f332907256c2dee8fb25b13f60 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -190,6 +190,10 @@ public class PurpurWorldConfig {
     public List<Item> itemImmuneToExplosion = new ArrayList<>();
     public List<Item> itemImmuneToFire = new ArrayList<>();
     public List<Item> itemImmuneToLightning = new ArrayList<>();
+    public boolean dontRunWithScissors = false;
+    public boolean ignoreScissorsInWater = false;
+    public boolean ignoreScissorsInLava = false;
+    public double scissorsRunningDamage = 1D;
     private void itemSettings() {
         itemImmuneToCactus.clear();
         getList("gameplay-mechanics.item.immune.cactus", new ArrayList<>()).forEach(key -> {
@@ -227,6 +231,10 @@ public class PurpurWorldConfig {
             Item item = BuiltInRegistries.ITEM.get(ResourceLocation.parse(key.toString()));
             if (item != Items.AIR) itemImmuneToLightning.add(item);
         });
+        dontRunWithScissors = getBoolean("gameplay-mechanics.item.shears.damage-if-sprinting", dontRunWithScissors);
+        ignoreScissorsInWater = getBoolean("gameplay-mechanics.item.shears.ignore-in-water", ignoreScissorsInWater);
+        ignoreScissorsInLava = getBoolean("gameplay-mechanics.item.shears.ignore-in-lava", ignoreScissorsInLava);
+        scissorsRunningDamage = getDouble("gameplay-mechanics.item.shears.sprinting-damage", scissorsRunningDamage);
     }
 
     public double minecartMaxSpeed = 0.4D;