From a9d0c37ce4142bb7e4ccb9ef0668aec2828f6294 Mon Sep 17 00:00:00 2001
From: blablubbabc <lukas@wirsindwir.de>
Date: Tue, 29 Aug 2017 14:42:14 +0200
Subject: Add BukkitTask#isCancelled

---
 .../java/org/bukkit/scheduler/BukkitRunnable.java  | 56 ++++++++++++++--------
 src/main/java/org/bukkit/scheduler/BukkitTask.java |  7 +++
 2 files changed, 42 insertions(+), 21 deletions(-)

diff --git a/src/main/java/org/bukkit/scheduler/BukkitRunnable.java b/src/main/java/org/bukkit/scheduler/BukkitRunnable.java
index c146ec7a..d526f0f8 100644
--- a/src/main/java/org/bukkit/scheduler/BukkitRunnable.java
+++ b/src/main/java/org/bukkit/scheduler/BukkitRunnable.java
@@ -7,7 +7,18 @@ import org.bukkit.plugin.Plugin;
  * This class is provided as an easy way to handle scheduling tasks.
  */
 public abstract class BukkitRunnable implements Runnable {
-    private int taskId = -1;
+    private BukkitTask task;
+
+    /**
+     * Returns true if this task has been cancelled.
+     *
+     * @return true if the task has been cancelled
+     * @throws IllegalStateException if task was not scheduled yet
+     */
+    public synchronized boolean isCancelled() throws IllegalStateException {
+        checkScheduled();
+        return task.isCancelled();
+    }
 
     /**
      * Attempts to cancel this task.
@@ -28,8 +39,8 @@ public abstract class BukkitRunnable implements Runnable {
      * @see BukkitScheduler#runTask(Plugin, Runnable)
      */
     public synchronized BukkitTask runTask(Plugin plugin) throws IllegalArgumentException, IllegalStateException {
-        checkState();
-        return setupId(Bukkit.getScheduler().runTask(plugin, (Runnable) this));
+        checkNotYetScheduled();
+        return setupTask(Bukkit.getScheduler().runTask(plugin, (Runnable) this));
     }
 
     /**
@@ -45,8 +56,8 @@ public abstract class BukkitRunnable implements Runnable {
      * @see BukkitScheduler#runTaskAsynchronously(Plugin, Runnable)
      */
     public synchronized BukkitTask runTaskAsynchronously(Plugin plugin) throws IllegalArgumentException, IllegalStateException  {
-        checkState();
-        return setupId(Bukkit.getScheduler().runTaskAsynchronously(plugin, (Runnable) this));
+        checkNotYetScheduled();
+        return setupTask(Bukkit.getScheduler().runTaskAsynchronously(plugin, (Runnable) this));
     }
 
     /**
@@ -60,8 +71,8 @@ public abstract class BukkitRunnable implements Runnable {
      * @see BukkitScheduler#runTaskLater(Plugin, Runnable, long)
      */
     public synchronized BukkitTask runTaskLater(Plugin plugin, long delay) throws IllegalArgumentException, IllegalStateException  {
-        checkState();
-        return setupId(Bukkit.getScheduler().runTaskLater(plugin, (Runnable) this, delay));
+        checkNotYetScheduled();
+        return setupTask(Bukkit.getScheduler().runTaskLater(plugin, (Runnable) this, delay));
     }
 
     /**
@@ -79,8 +90,8 @@ public abstract class BukkitRunnable implements Runnable {
      * @see BukkitScheduler#runTaskLaterAsynchronously(Plugin, Runnable, long)
      */
     public synchronized BukkitTask runTaskLaterAsynchronously(Plugin plugin, long delay) throws IllegalArgumentException, IllegalStateException  {
-        checkState();
-        return setupId(Bukkit.getScheduler().runTaskLaterAsynchronously(plugin, (Runnable) this, delay));
+        checkNotYetScheduled();
+        return setupTask(Bukkit.getScheduler().runTaskLaterAsynchronously(plugin, (Runnable) this, delay));
     }
 
     /**
@@ -96,8 +107,8 @@ public abstract class BukkitRunnable implements Runnable {
      * @see BukkitScheduler#runTaskTimer(Plugin, Runnable, long, long)
      */
     public synchronized BukkitTask runTaskTimer(Plugin plugin, long delay, long period) throws IllegalArgumentException, IllegalStateException  {
-        checkState();
-        return setupId(Bukkit.getScheduler().runTaskTimer(plugin, (Runnable) this, delay, period));
+        checkNotYetScheduled();
+        return setupTask(Bukkit.getScheduler().runTaskTimer(plugin, (Runnable) this, delay, period));
     }
 
     /**
@@ -118,8 +129,8 @@ public abstract class BukkitRunnable implements Runnable {
      *     long)
      */
     public synchronized BukkitTask runTaskTimerAsynchronously(Plugin plugin, long delay, long period) throws IllegalArgumentException, IllegalStateException  {
-        checkState();
-        return setupId(Bukkit.getScheduler().runTaskTimerAsynchronously(plugin, (Runnable) this, delay, period));
+        checkNotYetScheduled();
+        return setupTask(Bukkit.getScheduler().runTaskTimerAsynchronously(plugin, (Runnable) this, delay, period));
     }
 
     /**
@@ -129,21 +140,24 @@ public abstract class BukkitRunnable implements Runnable {
      * @throws IllegalStateException if task was not scheduled yet
      */
     public synchronized int getTaskId() throws IllegalStateException {
-        final int id = taskId;
-        if (id == -1) {
+        checkScheduled();
+        return task.getTaskId();
+    }
+
+    private void checkScheduled() {
+        if (task == null) {
             throw new IllegalStateException("Not scheduled yet");
         }
-        return id;
     }
 
-    private void checkState() {
-        if (taskId != -1) {
-            throw new IllegalStateException("Already scheduled as " + taskId);
+    private void checkNotYetScheduled() {
+        if (task != null) {
+            throw new IllegalStateException("Already scheduled as " + task.getTaskId());
         }
     }
 
-    private BukkitTask setupId(final BukkitTask task) {
-        this.taskId = task.getTaskId();
+    private BukkitTask setupTask(final BukkitTask task) {
+        this.task = task;
         return task;
     }
 }
diff --git a/src/main/java/org/bukkit/scheduler/BukkitTask.java b/src/main/java/org/bukkit/scheduler/BukkitTask.java
index e447e64e..9c693f83 100644
--- a/src/main/java/org/bukkit/scheduler/BukkitTask.java
+++ b/src/main/java/org/bukkit/scheduler/BukkitTask.java
@@ -28,6 +28,13 @@ public interface BukkitTask {
      */
     public boolean isSync();
 
+    /**
+     * Returns true if this task has been cancelled.
+     *
+     * @return true if the task has been cancelled
+     */
+    public boolean isCancelled();
+
     /**
      * Will attempt to cancel this task.
      */
-- 
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