TopNPlayer: Task could not startup if ranks are enabled but there are…

… no default ranks.

Log a message in the console that the task cannot start because ranks are enabled and there are no ranks.
Request that Ranks module is disabled, or add default ranks and then restart the server.

docs/changelog_v3.3.x.md

@@ -23,7 +23,12 @@ These change logs represent the work that has been going on within prison.
 * **Changed the default color code from `&9` (dark blue) to `&b` (light blue) for debug logging since the dark blue could be difficult to see on some consoles. 
 
 
-**v3.3.0-alpha.15f 2023-09-23**
+**v3.3.0-alpha.15f 2023-09-24**
+
+
+* **TopNPlayer: Task could not startup if ranks are enabled but there are no default ranks.**
+Log a message in the console that the task cannot start because ranks are enabled and there are no ranks. 
+Request that Ranks module is disabled, or add default ranks and then restart the server.
 
 
 * **Prison Support: Added a more secure method and server (privatebin) for submitting server information under prison support submit commands.**

prison-ranks/src/main/java/tech/mcprison/prison/ranks/data/TopNPlayers.java

@@ -12,6 +12,7 @@
 import tech.mcprison.prison.file.FileIOData;
 import tech.mcprison.prison.file.JsonFileIO;
 import tech.mcprison.prison.internal.Player;
+import tech.mcprison.prison.output.Output;
 import tech.mcprison.prison.ranks.PrisonRanks;
 import tech.mcprison.prison.ranks.tasks.TopNPlayerUpdateAsyncTask;
 
@@ -132,7 +133,9 @@ private void launchTopNPlayerUpdateAsyncTask() {
 
 		if ( PrisonRanks.getInstance() != null &&
 				PrisonRanks.getInstance().isEnabled() &&
-				PrisonRanks.getInstance().getPlayerManager() != null ) {
+				PrisonRanks.getInstance().getPlayerManager() != null &&
+						PrisonRanks.getInstance().getDefaultLadder().getRanks().size() > 0
+				) {
 
 			Long delayTicks = Prison.get().getPlatform().getConfigLong( 
 					"topNPlayers.refresh.delay-ticks", DELAY_THIRTY_SECONDS_TICKS );
@@ -142,6 +145,15 @@ private void launchTopNPlayerUpdateAsyncTask() {
 
 			TopNPlayerUpdateAsyncTask.submitTaskTimerAsync( this, delayTicks, intervalTicks );
 		}
+		else if ( PrisonRanks.getInstance() != null &&
+				PrisonRanks.getInstance().isEnabled() &&
+						PrisonRanks.getInstance().getDefaultLadder().getRanks().size() == 0 ) {
+
+			Output.get().logWarn( "TopNPlayer: Cannot start the TopNPlayer task. Ranks are "
+					+ "enabled, but there are no default ranks setup. "
+					+ "Either turn off the Ranks Module, or add ranks and "
+					+ "then restart the server to get the TopNPlayer task running.");
+		}
 
 	}