From 55150e10ff8e9ecfc60e5f3fe405b2e198ac923a 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 1b9c852..a3f4c1f 100644
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
@@ -210,4 +210,9 @@ 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/CommandScoreboard.java b/src/main/java/net/minecraft/server/CommandScoreboard.java
index 8e5419d..64a3495 100644
--- a/src/main/java/net/minecraft/server/CommandScoreboard.java
+++ b/src/main/java/net/minecraft/server/CommandScoreboard.java
@@ -182,6 +182,13 @@ public class CommandScoreboard extends CommandAbstract {
                             throw new ExceptionUsage("commands.scoreboard.teams.option.usage", new Object[0]);
                         }
 
+                        // Paper start - Block setting options on our collideRule team as it is not persistent
+                        if (astring[2].equals(MinecraftServer.getServer().getPlayerList().collideRuleTeamName)) {
+                            icommandlistener.sendMessage(new ChatMessage("You cannot set team options on the collideRule team"));
+                            return;
+                        }
+                        // Paper  end
+
                         this.c(icommandlistener, astring, 2, minecraftserver);
                     }
                 }
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index e35341b..01325b3 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -324,6 +324,14 @@ 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);
+            ScoreboardTeam collideTeam = this.getWorld().getScoreboard().createTeam(this.getPlayerList().collideRuleTeamName);
+            collideTeam.setCanSeeFriendlyInvisibles(false); // Because we want to mimic them not being on a team at all
+        }
+        // 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 d26da3a..eb846cf 100644
--- a/src/main/java/net/minecraft/server/PlayerList.java
+++ b/src/main/java/net/minecraft/server/PlayerList.java
@@ -68,6 +68,7 @@ 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);
@@ -235,6 +236,12 @@ public abstract class PlayerList {
         }
 
         entityplayer.syncInventory();
+        // Paper start - Add to collideRule team if needed
+        final Scoreboard scoreboard = this.getServer().getWorld().getScoreboard();
+        if (this.collideRuleTeamName != null && scoreboard.getTeam(collideRuleTeamName) != null && entityplayer.getTeam() == null) {
+            scoreboard.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 + ")");
     }
@@ -405,6 +412,16 @@ 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) {
+            final Scoreboard scoreBoard = this.server.getWorld().getScoreboard();
+            final ScoreboardTeam team = scoreBoard.getTeam(this.collideRuleTeamName);
+            if (entityplayer.getTeam() == team && team != null) {
+                scoreBoard.removePlayerFromTeam(entityplayer.getName(), team);
+            }
+        }
+        // Paper end
+
         this.savePlayerFile(entityplayer);
         if (entityplayer.isPassenger()) {
             Entity entity = entityplayer.getVehicle();
@@ -1304,7 +1321,13 @@ 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) {
+            final Scoreboard scoreboard = this.getServer().getWorld().getScoreboard();
+            final ScoreboardTeam team = scoreboard.getTeam(this.collideRuleTeamName);
+            if (team != null) scoreboard.removeTeam(team);
+        }
+        // Paper end
     }
 
     // CraftBukkit start
-- 
2.9.3