Add events for when a town/nation spawn is set.

src/com/palmergames/bukkit/towny/command/NationCommand.java

@@ -17,6 +17,7 @@
 import com.palmergames.bukkit.towny.event.NationPreRemoveEnemyEvent;
 import com.palmergames.bukkit.towny.event.nation.NationRankAddEvent;
 import com.palmergames.bukkit.towny.event.nation.NationRankRemoveEvent;
+import com.palmergames.bukkit.towny.event.nation.NationSetSpawnEvent;
 import com.palmergames.bukkit.towny.event.nation.NationTownLeaveEvent;
 import com.palmergames.bukkit.towny.event.NationRemoveEnemyEvent;
 import com.palmergames.bukkit.towny.event.NationRequestAllyNationEvent;
@@ -2199,7 +2200,7 @@ public static void nationSet(CommandSender sender, String[] split, boolean admin
 			} else if (split[0].equalsIgnoreCase("spawn")){
 
 				if (sender instanceof Player player)
-					parseNationSetSpawnCommand(player, nation);
+					parseNationSetSpawnCommand(player, nation, admin);
 				else 
 					throw new TownyException("Not meant for console!");
 			}
@@ -2438,13 +2439,22 @@ else if (split[1].equalsIgnoreCase("clear")) {
 		}
 	}
 
-	private static void parseNationSetSpawnCommand(Player player, Nation nation) {
-		try{
-			Location newSpawn = player.getLocation();
-
-			if (TownyAPI.getInstance().isWilderness(newSpawn))
+	private static void parseNationSetSpawnCommand(Player player, Nation nation, boolean admin) {
+		try {
+			if (TownyAPI.getInstance().isWilderness(player.getLocation()))
 				throw new TownyException(Translatable.of("msg_cache_block_error_wild", "set spawn"));
 
+			NationSetSpawnEvent event = new NationSetSpawnEvent(nation, player, player.getLocation());
+			Bukkit.getPluginManager().callEvent(event);
+			if (event.isCancelled() && !admin) {
+				if (!event.getCancelMessage().isEmpty())
+					TownyMessaging.sendErrorMsg(player, event.getCancelMessage());
+
+				return;
+			}
+
+			Location newSpawn = admin ? player.getLocation() : event.getNewSpawn();
+
 			TownBlock townBlock = TownyAPI.getInstance().getTownBlock(newSpawn);
 			Town town = townBlock.getTownOrNull();
 

src/com/palmergames/bukkit/towny/command/TownCommand.java

@@ -28,6 +28,7 @@
 import com.palmergames.bukkit.towny.event.town.TownPreMergeEvent;
 import com.palmergames.bukkit.towny.event.town.TownPreSetHomeBlockEvent;
 import com.palmergames.bukkit.towny.event.town.TownPreUnclaimCmdEvent;
+import com.palmergames.bukkit.towny.event.town.TownSetSpawnEvent;
 import com.palmergames.bukkit.towny.event.town.TownTrustAddEvent;
 import com.palmergames.bukkit.towny.event.town.TownTrustRemoveEvent;
 import com.palmergames.bukkit.towny.event.town.toggle.TownToggleNeutralEvent;
@@ -2508,7 +2509,7 @@ else if (split[1].equalsIgnoreCase("clear")) {
 
 				} else if (split[0].equalsIgnoreCase("spawn")) {
 
-					parseTownSetSpawn(player, town);
+					parseTownSetSpawn(player, town, admin);
 
 				} else if (split[0].equalsIgnoreCase("outpost")) {
 
@@ -2686,13 +2687,24 @@ private static void parseTownBaltop(Player player, Town town) {
 		player.openBook(BookFactory.makeBook("Town Baltop", town.getName(), sb.toString()));
 	}
 
-	private static void parseTownSetSpawn(Player player, Town town) {
+	private static void parseTownSetSpawn(Player player, Town town, boolean admin) {
 		try {
 			// Towns can only set their spawn if they have a homeblock.
 			if (!town.hasHomeBlock())
 				throw new TownyException(Translatable.of("msg_err_homeblock_has_not_been_set"));
 
-			TownBlock tb = TownyAPI.getInstance().getTownBlock(player.getLocation());
+			TownSetSpawnEvent event = new TownSetSpawnEvent(town, player, player.getLocation());
+			Bukkit.getPluginManager().callEvent(event);
+			if (event.isCancelled() && !admin) {
+				if (!event.getCancelMessage().isEmpty())
+					TownyMessaging.sendErrorMsg(player, event.getCancelMessage());
+
+				return;
+			}
+
+			Location newSpawn = admin ? player.getLocation() : event.getNewSpawn();
+
+			TownBlock tb = TownyAPI.getInstance().getTownBlock(newSpawn);
 
 			// The townblock needs to exist, belong to the town and also be inside of the homeblock.
 			if (tb == null || !tb.hasTown() || !tb.getTownOrNull().equals(town) || !town.getHomeBlock().getWorldCoord().equals(tb.getWorldCoord()))
@@ -2703,7 +2715,7 @@ private static void parseTownSetSpawn(Player player, Town town) {
 				TownyUniverse.getInstance().removeSpawnPoint(town.getSpawnOrNull());
 
 			// Set the spawn point and send feedback message.
-			town.setSpawn(player.getLocation());
+			town.setSpawn(newSpawn);
 			TownyMessaging.sendMsg(player, Translatable.of("msg_set_town_spawn"));
 		} catch (TownyException e) {
 			TownyMessaging.sendErrorMsg(player, e.getMessage(player));

src/com/palmergames/bukkit/towny/event/nation/NationSetSpawnEvent.java

@@ -0,0 +1,99 @@
+package com.palmergames.bukkit.towny.event.nation;
+
+import com.palmergames.bukkit.towny.object.Nation;
+import com.palmergames.bukkit.towny.object.Translation;
+import org.bukkit.Location;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Fired when a player uses /nation set spawn
+ */
+public class NationSetSpawnEvent extends Event implements Cancellable {
+	private static final HandlerList handlers = new HandlerList();
+
+	private final Nation nation;
+	private final Player player;
+	private final Location oldSpawn;
+	private Location newSpawn;
+
+	private boolean cancelled = false;
+	private String cancelMessage = Translation.of("msg_err_command_disable");
+
+	public NationSetSpawnEvent(Nation nation, Player player, Location newSpawn) {
+		this.nation = nation;
+		this.player = player;
+		this.oldSpawn = nation.getSpawnOrNull();
+		this.newSpawn = newSpawn;
+	}
+
+	/**
+	 * @return The nation for which this spawn is being set.
+	 */
+	@NotNull
+	public Nation getNation() {
+		return nation;
+	}
+
+	/**
+	 * @return The player that is changing the spawn.
+	 */
+	@NotNull
+	public Player getPlayer() {
+		return player;
+	}
+
+	/**
+	 * @return The old spawn, or {@code null} if none has been set.
+	 */
+	@Nullable
+	public Location getOldSpawn() {
+		return oldSpawn;
+	}
+
+	/**
+	 * @return The location where the spawn is being set to.
+	 */
+	@NotNull
+	public Location getNewSpawn() {
+		return newSpawn;
+	}
+
+	/**
+	 * @param newSpawn Sets the location where the new spawn will be set to.
+	 */
+	public void setNewSpawn(@NotNull Location newSpawn) {
+		this.newSpawn = newSpawn;
+	}
+
+	@Override
+	public void setCancelled(boolean cancelled) {
+		this.cancelled = cancelled;
+	}
+
+	@Override
+	public boolean isCancelled() {
+		return cancelled;
+	}
+
+	public void setCancelMessage(String cancelMessage) {
+		this.cancelMessage = cancelMessage;
+	}
+
+	public String getCancelMessage() {
+		return cancelMessage;
+	}
+
+	public static HandlerList getHandlerList() {
+		return handlers;
+	}
+
+	@Override
+	public @NotNull HandlerList getHandlers() {
+		return handlers;
+	}
+}

src/com/palmergames/bukkit/towny/event/town/TownSetSpawnEvent.java

@@ -0,0 +1,96 @@
+package com.palmergames.bukkit.towny.event.town;
+
+import com.palmergames.bukkit.towny.object.Town;
+import com.palmergames.bukkit.towny.object.Translation;
+import org.bukkit.Location;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Fired when a player uses /town set spawn
+ */
+public class TownSetSpawnEvent extends Event implements Cancellable {
+	private static final HandlerList handlers = new HandlerList();
+
+	private final Town town;
+	private final Player player;
+	private final Location oldSpawn;
+	private Location newSpawn;
+
+	private boolean cancelled = false;
+	private String cancelMessage = Translation.of("msg_err_command_disable");
+
+	public TownSetSpawnEvent(Town town, Player player, Location newSpawn) {
+		this.town = town;
+		this.player = player;
+		this.oldSpawn = town.getSpawnOrNull();
+		this.newSpawn = newSpawn;
+	}
+
+	/**
+	 * @return The town for which this spawn is being set.
+	 */
+	@NotNull
+	public Town getTown() {
+		return town;
+	}
+
+	/**
+	 * @return The player that ran the command
+	 */
+	@NotNull
+	public Player getPlayer() {
+		return player;
+	}
+
+	/**
+	 * @return The town's old spawnpoint location.
+	 */
+	@Nullable
+	public Location getOldSpawn() {
+		return oldSpawn;
+	}
+
+	/**
+	 * @return The new spawn location.
+	 */
+	@NotNull
+	public Location getNewSpawn() {
+		return newSpawn;
+	}
+
+	public void setNewSpawn(@NotNull Location newSpawn) {
+		this.newSpawn = newSpawn;
+	}
+
+	@Override
+	public boolean isCancelled() {
+		return cancelled;
+	}
+
+	@Override
+	public void setCancelled(boolean cancelled) {
+		this.cancelled = cancelled;
+	}
+
+	public String getCancelMessage() {
+		return cancelMessage;
+	}
+
+	public void setCancelMessage(String cancelMessage) {
+		this.cancelMessage = cancelMessage;
+	}
+
+	public static HandlerList getHandlerList() {
+		return handlers;
+	}
+
+	@Override
+	public @NotNull HandlerList getHandlers() {
+		return handlers;
+	}
+}