From c4bf9f6376eaced57b5b23e4426002e1c78c8782 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 27 Mar 2019 22:48:45 -0400
Subject: [PATCH] Server Tick Events

Fires event at start and end of a server tick

diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index b93fccf919..d6250c4722 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -927,6 +927,7 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
         co.aikar.timings.TimingsManager.FULL_SERVER_TICK.startTiming(); // Paper
         this.slackActivityAccountant.tickStarted(); // Spigot
         long i = SystemUtils.getMonotonicNanos(); long startTime = i; // Paper
+        new com.destroystokyo.paper.event.server.ServerTickStartEvent(this.ticks+1).callEvent(); // Paper
 
         ++this.ticks;
         if (this.S) {
@@ -995,6 +996,11 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
         PaperLightingQueue.processQueue(startTime); // Paper
         expiringMaps.removeIf(ExpiringMap::clean); // Paper
         this.slackActivityAccountant.tickEnded(l); // Spigot
+        // Paper start
+        long endTime = System.nanoTime();
+        long remaining = (TICK_TIME - (endTime - lastTick)) - catchupTime;
+        new com.destroystokyo.paper.event.server.ServerTickEndEvent(this.ticks, ((double)(endTime - lastTick) / 1000000D), remaining).callEvent();
+        // Paper end
         co.aikar.timings.TimingsManager.FULL_SERVER_TICK.stopTiming(); // Paper
     }
 
-- 
2.21.0