From 298ae9e91ce8416d2942e74a935e11b6764c3e84 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 13 Apr 2016 02:10:49 -0400
Subject: [PATCH] Configurable Player Collision


diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
index 17c05f8..d9d8904 100644
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
@@ -218,4 +218,9 @@ public class PaperConfig {
     private static void regionFileCacheSize() {
         regionFileCacheSize = getInt("settings.region-file-cache-size", 256);
     }
+
+    public static boolean enablePlayerCollisions = true;
+    private static void enablePlayerCollisions() {
+        enablePlayerCollisions = getBoolean("settings.enable-player-collisions", true);
+    }
 }
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 8e364de..90cce4a 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -324,6 +324,13 @@ public abstract class MinecraftServer implements Runnable, ICommandListener, IAs
         this.v.setPlayerFileData(this.worldServer);
         this.a(this.getDifficulty());
         this.l();
+
+        // Paper start - Handle collideRule team for player collision toggle
+        if (!com.destroystokyo.paper.PaperConfig.enablePlayerCollisions) {
+            this.getPlayerList().collideRuleTeamName = org.apache.commons.lang3.StringUtils.left("collideRule_" + this.getWorld().random.nextInt(), 16);
+            this.getWorld().getScoreboard().createTeam(this.getPlayerList().collideRuleTeamName);
+        }
+        // Paper end
     }
 
     protected void l() {
diff --git a/src/main/java/net/minecraft/server/PacketPlayOutScoreboardTeam.java b/src/main/java/net/minecraft/server/PacketPlayOutScoreboardTeam.java
index d8ec504..eb45d3c 100644
--- a/src/main/java/net/minecraft/server/PacketPlayOutScoreboardTeam.java
+++ b/src/main/java/net/minecraft/server/PacketPlayOutScoreboardTeam.java
@@ -96,7 +96,7 @@ public class PacketPlayOutScoreboardTeam implements Packet<PacketListenerPlayOut
             packetdataserializer.a(this.d);
             packetdataserializer.writeByte(this.j);
             packetdataserializer.a(this.e);
-            packetdataserializer.a(this.f);
+            packetdataserializer.a(!com.destroystokyo.paper.PaperConfig.enablePlayerCollisions ? "never" : this.f); // Paper
             packetdataserializer.writeByte(this.g);
         }
 
diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
index a41bc5f..6dc0abb 100644
--- a/src/main/java/net/minecraft/server/PlayerList.java
+++ b/src/main/java/net/minecraft/server/PlayerList.java
@@ -67,6 +67,7 @@ public abstract class PlayerList {
     // CraftBukkit start
     private CraftServer cserver;
     private final Map<String,EntityPlayer> playersByName = new org.spigotmc.CaseInsensitiveMap<EntityPlayer>();
+    @Nullable String collideRuleTeamName; // Paper - Team name used for collideRule
 
     public PlayerList(MinecraftServer minecraftserver) {
         this.cserver = minecraftserver.server = new CraftServer(minecraftserver, this);
@@ -234,6 +235,11 @@ public abstract class PlayerList {
         }
 
         entityplayer.syncInventory();
+        // Paper start - Add to collideRule team if needed
+        if (this.collideRuleTeamName != null) {
+            this.server.getWorld().getScoreboard().addPlayerToTeam(entityplayer.getName(), collideRuleTeamName);
+        }
+        // Paper end
         // CraftBukkit - Moved from above, added world
         PlayerList.f.info(entityplayer.getName() + "[" + s1 + "] logged in with entity id " + entityplayer.getId() + " at ([" + entityplayer.world.worldData.getName() + "]" + entityplayer.locX + ", " + entityplayer.locY + ", " + entityplayer.locZ + ")");
     }
@@ -404,6 +410,14 @@ public abstract class PlayerList {
         entityplayer.k_();// SPIGOT-924 // PAIL: rename - playerTick
         // CraftBukkit end
 
+        // Paper start - Remove from collideRule team if needed
+        if (this.collideRuleTeamName != null) {
+            Scoreboard scoreBoard = this.server.getWorld().getScoreboard();
+            ScoreboardTeam team = scoreBoard.getTeam(this.collideRuleTeamName);
+            if (team != null) scoreBoard.removePlayerFromTeam(entityplayer.getName(), team);
+        }
+        // Paper end
+
         this.savePlayerFile(entityplayer);
         if (entityplayer.isPassenger()) {
             Entity entity = entityplayer.getVehicle();
@@ -1302,7 +1316,13 @@ public abstract class PlayerList {
             player.playerConnection.disconnect(this.server.server.getShutdownMessage()); // CraftBukkit - add custom shutdown message
         }
         // CraftBukkit end
-
+        // Paper start - Remove collideRule team if it exists
+        if (this.collideRuleTeamName != null) {
+            Scoreboard scoreboard = this.getServer().getWorld().getScoreboard();
+            ScoreboardTeam team = scoreboard.getTeam(this.collideRuleTeamName);
+            if (team != null) scoreboard.removeTeam(team);
+        }
+        // Paper end
     }
 
     // CraftBukkit start
-- 
2.9.3