From 9f65c68e7f315074b3b16e408c8cc072356d36eb Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Tue, 23 Jul 2019 10:07:16 -0500
Subject: [PATCH] Implement lagging threshold

---
 src/main/java/net/minecraft/server/MinecraftServer.java | 2 ++
 src/main/java/net/pl3x/purpur/PurpurConfig.java         | 2 ++
 src/main/java/org/bukkit/craftbukkit/CraftServer.java   | 5 +++++
 3 files changed, 9 insertions(+)

diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index a4bd7348eb..d1e8cb4f4c 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -175,6 +175,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
     public static final int TICK_TIME = 1000000000 / TPS;
     private static final int SAMPLE_INTERVAL = 20; // Paper
     public final double[] recentTps = new double[ 3 ];
+    public boolean lagging = false; // Purpur
     public final SlackActivityAccountant slackActivityAccountant = new SlackActivityAccountant();
     // Spigot end
 
@@ -906,6 +907,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
                         recentTps[0] = tps1.getAverage();
                         recentTps[1] = tps5.getAverage();
                         recentTps[2] = tps15.getAverage();
+                        lagging = recentTps[0] < net.pl3x.purpur.PurpurConfig.laggingThreshold; // Purpur
                         // Paper end
                         tickSection = curTime;
                     }
diff --git a/src/main/java/net/pl3x/purpur/PurpurConfig.java b/src/main/java/net/pl3x/purpur/PurpurConfig.java
index d8321e8ec3..14450651cb 100644
--- a/src/main/java/net/pl3x/purpur/PurpurConfig.java
+++ b/src/main/java/net/pl3x/purpur/PurpurConfig.java
@@ -138,9 +138,11 @@ public class PurpurConfig {
 
     public static boolean enableTickOverload = false;
     public static boolean enableTPSCatchup = false;
+    public static double laggingThreshold = 19.0D;
     private static void tickLoopSettings() {
         enableTickOverload = getBoolean("settings.enable-tick-overload", enableTickOverload);
         enableTPSCatchup = getBoolean("settings.enable-tps-catchup", enableTPSCatchup);
+        laggingThreshold = getDouble("settings.lagging-threshold", laggingThreshold);
     }
 
     public static boolean disableDropsOnCrammingDeath = true;
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 34a6d26a2a..42b986274f 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -2170,5 +2170,10 @@ public final class CraftServer implements Server {
     public String getServerName() {
         return getProperties().serverName;
     }
+
+    @Override
+    public boolean isLagging() {
+        return getServer().lagging;
+    }
     // Purpur end
 }
-- 
2.20.1