Added components with deps

Copied from ButtonPresents and extended
@alisolarflare
#48

ButtonCore/src/main/java/buttondevteam/lib/architecture/Component.java

@@ -0,0 +1,118 @@
+package buttondevteam.lib.architecture;
+
+import buttondevteam.lib.TBMCCoreAPI;
+import buttondevteam.lib.chat.TBMCChatAPI;
+import buttondevteam.lib.chat.TBMCCommandBase;
+import lombok.val;
+import org.bukkit.configuration.file.FileConfiguration;
+import org.bukkit.event.Listener;
+import org.bukkit.plugin.java.JavaPlugin;
+
+import java.util.HashMap;
+
+public abstract class Component {
+	private static HashMap<Class<? extends Component>, Component> components;
+
+	/**
+	 * Registers a component checking it's dependencies and calling {@link #register(JavaPlugin)}.<br>
+	 * Make sure to register the dependencies first.
+	 *
+	 * @param component The component to register
+	 */
+	public static void registerComponent(JavaPlugin plugin, Component component) {
+		val metaAnn = component.getClass().getAnnotation(ComponentMetadata.class);
+		if (metaAnn != null) {
+			Class<? extends Component>[] dependencies = metaAnn.depends();
+			for (val dep : dependencies) {
+				if (!components.containsKey(dep)) {
+					plugin.getLogger().warning("Failed to register component " + component.getClassName() + " as a required dependency is missing/disabled: " + dep.getSimpleName());
+					return;
+				}
+			}
+		}
+		component.register(plugin);
+		components.put(component.getClass(), component);
+	}
+
+	/**
+	 * Unregisters a component by calling {@link #unregister(JavaPlugin)}.<br>
+	 * Make sure to unregister the dependencies last.
+	 *
+	 * @param componentClass The component class to unregister
+	 */
+	public static void unregisterComponent(JavaPlugin plugin, Class<? extends Component> componentClass) {
+		val component = components.get(componentClass);
+		if (component == null)
+			return; //Failed to load
+		val metaAnn = componentClass.getAnnotation(ComponentMetadata.class);
+		if (metaAnn != null) {
+			Class<? extends Component>[] dependencies = metaAnn.depends();
+			for (val dep : dependencies) {
+				if (!components.containsKey(dep)) {
+					plugin.getLogger().warning("Failed to unregister component " + component.getClassName() + " as a required dependency is missing/disabled: " + dep.getSimpleName());
+					return;
+				}
+			}
+		}
+		component.unregister(plugin);
+		components.remove(componentClass);
+	}
+
+	/**
+	 * This is used to send a warning if there are registered components on shutdown.<br>
+	 *
+	 * @return If there are any registered components
+	 */
+	public static boolean haveRegisteredComponents() {
+		return components.size() > 0;
+	}
+
+	/**
+	 * Registers the module, when called by the JavaPlugin class. Call
+	 * registerCommand() and registerListener() within this method.
+	 *
+	 * @param plugin Plugin class called to register commands and listeners
+	 */
+	public abstract void register(JavaPlugin plugin);
+
+	/**
+	 * Registers a TBMCCommand to the plugin. Make sure to add it to plugin.yml and use {@link buttondevteam.lib.chat.CommandClass}.
+	 *
+	 * @param plugin      Main plugin responsible for stuff
+	 * @param commandBase Custom coded command class
+	 */
+	protected void registerCommand(JavaPlugin plugin, TBMCCommandBase commandBase) {
+		TBMCChatAPI.AddCommand(plugin, commandBase);
+	}
+
+	/**
+	 * Registers a Listener to this plugin
+	 *
+	 * @param plugin   Main plugin responsible for stuff
+	 * @param listener The event listener to register
+	 * @return The provided listener
+	 */
+	protected Listener registerListener(JavaPlugin plugin, Listener listener) {
+		TBMCCoreAPI.RegisterEventsForExceptions(listener, plugin);
+		return listener;
+	}
+
+	public void saveData(FileConfiguration config, String pathToData, Object data) {
+		config.set("moduledata." + this.getClassName() + "." + pathToData, data);
+	}
+
+	public Object getData(FileConfiguration config, String pathToData, Object data) {
+		return config.get("moduledata." + this.getClassName() + "." + pathToData, data);
+	}
+
+	private String getClassName() {
+		Class<?> enclosingClass = getClass().getEnclosingClass();
+		String className;
+		if (enclosingClass != null) {
+			className = (enclosingClass.getName());
+		} else {
+			className = (getClass().getName());
+		}
+		return className;
+	}
+}

ButtonCore/src/main/java/buttondevteam/lib/architecture/ComponentMetadata.java

@@ -0,0 +1,12 @@
+package buttondevteam.lib.architecture;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ComponentMetadata {
+	Class<? extends Component>[] depends();
+}