Purpur/patches/server/0128-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 edec3a0e85d0349476a3316b7ae8a8559b067b7c..abec164f413342bf1d2d25479ea8a42fce6a66c7 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -1667,6 +1667,13 @@ 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();
@@ -1706,6 +1713,14 @@ 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 be87cb3cfa15a7d889118cdc4b87232e30749023..61e906fb47b242e86789dca1a210473c76863166 100644
--- a/src/main/java/net/minecraft/world/damagesource/DamageSources.java
+++ b/src/main/java/net/minecraft/world/damagesource/DamageSources.java
@@ -46,11 +46,13 @@ 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.lookupOrThrow(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);
@@ -101,6 +103,12 @@ 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 64c84cb6cc647ca37a0664b83eb24e7202aeb1e2..28800c519ab8a6648d632a577ffbecae175f3844 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
@@ -186,6 +186,7 @@ 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);
@@ -197,6 +198,12 @@ 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 066a6407ed76a3a2b77541f24d4c3429d3a1a189..a980b4d3e1e4df4e2e2d7ecedafe23abe434fccb 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -191,6 +191,10 @@ 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 -> {
@@ -228,6 +232,10 @@ public class PurpurWorldConfig {
             Item item = BuiltInRegistries.ITEM.getValue(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;