Create VisitAddonManager class.

Collect all GameMode addons where VisitAddon is enabled.

src/main/java/world/bentobox/visit/VisitAddon.java

@@ -13,6 +13,7 @@
 import world.bentobox.visit.commands.admin.VisitSettingsCommand;
 import world.bentobox.visit.commands.player.VisitPlayerCommand;
 import world.bentobox.visit.configs.Settings;
+import world.bentobox.visit.managers.VisitAddonManager;
 
 
 /**
@@ -29,6 +30,11 @@ public class VisitAddon extends Addon
 	 */
 	private Settings settings;
 
+	/**
+	 * Stores addon manager.
+	 */
+	private VisitAddonManager addonManager;
+
 	/**
 	 * Local variable that stores if vaultHook is present.
 	 */
@@ -117,6 +123,8 @@ public void onEnable()
 			return;
 		}
 
+		this.addonManager = new VisitAddonManager(this);
+
 		// If your addon wants to hook into other GameModes, f.e. use flags, then you should
 		// hook these flags into each GameMode.
 
@@ -144,6 +152,9 @@ public void onEnable()
 
 				gameModeAddon.getPlayerCommand().ifPresent(
 					playerCommand -> new VisitPlayerCommand(this, playerCommand));
+
+				// Add gamemode to enabled addon list. Used in GUIs.
+				this.addonManager.addGameMode(gameModeAddon);
 			}
 		});
 
@@ -178,6 +189,8 @@ public void onReload()
 
 		this.settings = new Config<>(this, Settings.class).loadConfigObject();
 
+		// TODO: check and readd disabled addon list in addon manager.
+
 		if (this.settings == null)
 		{
 			// If we failed to load Settings then we should not enable addon.
@@ -212,4 +225,24 @@ public VaultHook getVaultHook()
 	{
 		return this.vaultHook.orElse(null);
 	}
+
+
+	/**
+	 * This method returns the settings value.
+	 * @return the value of settings.
+	 */
+	public Settings getSettings()
+	{
+		return this.settings;
+	}
+
+
+	/**
+	 * This method returns the addonManager value.
+	 * @return the value of addonManager.
+	 */
+	public VisitAddonManager getAddonManager()
+	{
+		return this.addonManager;
+	}
 }

src/main/java/world/bentobox/visit/managers/VisitAddonManager.java

@@ -0,0 +1,78 @@
+package world.bentobox.visit.managers;
+
+
+import java.util.ArrayList;
+import java.util.List;
+
+import world.bentobox.bentobox.api.addons.GameModeAddon;
+import world.bentobox.visit.VisitAddon;
+
+
+/**
+ * This class manages data handling and option processing for Visit Addon.
+ */
+public class VisitAddonManager
+{
+	// ---------------------------------------------------------------------
+	// Section: Variables
+	// ---------------------------------------------------------------------
+
+	/**
+	 * Local variable that stores all GameMode addons where current addon is enabled.
+	 */
+	private final List<GameModeAddon> enabledAddonList;
+
+	/**
+	 * Reference to main addon class.
+	 */
+	private final VisitAddon addon;
+
+	// ---------------------------------------------------------------------
+	// Section: Constructors
+	// ---------------------------------------------------------------------
+
+
+	/**
+	 * Constructor VisitAddonManager creates a new VisitAddonManager instance.
+	 *
+	 * @param addon of type VisitAddon
+	 */
+	public VisitAddonManager(VisitAddon addon)
+	{
+		this.addon = addon;
+		this.enabledAddonList = new ArrayList<>(5);
+	}
+
+
+	// ---------------------------------------------------------------------
+	// Section: Methods
+	// ---------------------------------------------------------------------
+
+
+	/**
+	 * This method adds given gamemode to the enabled addon list.
+	 * @param addon Addon that must be added to enabled addon list.
+	 */
+	public void addGameMode(GameModeAddon addon)
+	{
+		this.enabledAddonList.add(addon);
+	}
+
+
+	/**
+	 * This method returns the enabledAddonList value.
+	 * @return the value of enabledAddonList.
+	 */
+	public List<GameModeAddon> getEnabledAddonList()
+	{
+		return enabledAddonList;
+	}
+
+
+	// ---------------------------------------------------------------------
+	// Section: Database methods
+	// ---------------------------------------------------------------------
+
+
+
+}