Added WorldGameRuleChangeEvent

paper-api/src/main/java/io/papermc/paper/event/world/WorldGameRuleChangeEvent.java

@@ -0,0 +1,88 @@
+package io.papermc.paper.event.world;
+
+import org.bukkit.GameRule;
+import org.bukkit.World;
+import org.bukkit.command.CommandSender;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.world.WorldEvent;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.Nullable;
+
+/**
+ * Called when a world's gamerule is changed, either by command or by api.
+ */
+@NullMarked
+public class WorldGameRuleChangeEvent extends WorldEvent implements Cancellable {
+
+    private static final HandlerList HANDLER_LIST = new HandlerList();
+
+    private final @Nullable CommandSender commandSender;
+    private final GameRule<?> gameRule;
+    private String value;
+    private boolean cancelled;
+
+    @ApiStatus.Internal
+    public WorldGameRuleChangeEvent(final World world, final @Nullable CommandSender commandSender, final GameRule<?> gameRule, final String value) {
+        super(world);
+        this.commandSender = commandSender;
+        this.gameRule = gameRule;
+        this.value = value;
+    }
+
+    /**
+     * Gets the command sender associated with this event.
+     *
+     * @return {@code null} if the gamerule was changed via api, otherwise the {@link CommandSender}.
+     */
+    public @Nullable CommandSender getCommandSender() {
+        return this.commandSender;
+    }
+
+    /**
+     * Gets the game rule associated with this event.
+     *
+     * @return the gamerule being changed.
+     */
+    public GameRule<?> getGameRule() {
+        return this.gameRule;
+    }
+
+    /**
+     * Gets the new value of the gamerule.
+     *
+     * @return the new value of the gamerule.
+     */
+    public String getValue() {
+        return this.value;
+    }
+
+    /**
+     * Sets the new value of this gamerule.
+     *
+     * @param value the new value of the gamerule.
+     */
+    public void setValue(final String value) {
+        this.value = value;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public void setCancelled(final boolean cancel) {
+        this.cancelled = cancel;
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return HANDLER_LIST;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
+}