Add isForceDefaultGameMode method (#12673)

paper-api/src/main/java/org/bukkit/Bukkit.java

@@ -1731,6 +1731,15 @@ public final class Bukkit {
         server.setDefaultGameMode(mode);
     }
     
+    /**
+     * Gets whether the default gamemode is being enforced.
+     *
+     * @return {@code true} if the default gamemode is being forced, {@code false} otherwise
+     */
+    public static boolean forcesDefaultGameMode() {
+        return server.forcesDefaultGameMode();
+    }
+
     /**
      * Gets a {@link ConsoleCommandSender} that may be used as an input source
      * for this server.

paper-api/src/main/java/org/bukkit/Server.java

@@ -1514,14 +1514,21 @@ public interface Server extends PluginMessageRecipient, net.kyori.adventure.audi
      * @return the default game mode
      */
     @NotNull
-    public GameMode getDefaultGameMode();
+    GameMode getDefaultGameMode();
 
     /**
      * Sets the default {@link GameMode} for new players.
      *
      * @param mode the new game mode
      */
-    public void setDefaultGameMode(@NotNull GameMode mode);
+    void setDefaultGameMode(@NotNull GameMode mode);
+
+    /**
+     * Gets whether the default gamemode is being enforced.
+     *
+     * @return {@code true} if the default gamemode is being forced, {@code false} otherwise
+     */
+    boolean forcesDefaultGameMode();
     
     /**
      * Gets a {@link ConsoleCommandSender} that may be used as an input source

paper-server/src/main/java/org/bukkit/craftbukkit/CraftServer.java

@@ -2295,6 +2295,11 @@ public final class CraftServer implements Server {
         }
     }
 
+    @Override
+    public boolean forcesDefaultGameMode() {
+        return this.console.getProperties().forceGameMode;
+    }
+
     @Override
     public ConsoleCommandSender getConsoleSender() {
         return this.console.console;