Draft: Basic implementation of plugin initializer

Signed-off-by: Bart Jaskulski bjaskulski@protonmail.com

src/HookDriver/Legacy/HookableParent.php

+<?php
+
+namespace WPDesk\Init\HookDriver\Legacy;
+
+use WPDesk\PluginBuilder\Plugin\Conditional;
+use WPDesk\PluginBuilder\Plugin\Hookable;
+use WPDesk\PluginBuilder\Plugin\HookablePluginDependant;
+
+trait HookableParent {
+
+	/** @var HooksRegistry|null */
+	private $registry;
+
+	/**
+	 * @param class-string<Hookable>|Hookable $hookable_object
+	 */
+	public function add_hookable( $hookable_object ) {
+		if ( $this->registry === null ) {
+			$this->registry = HooksRegistry::instance();
+		}
+
+		$this->registry->add( $hookable_object );
+	}
+
+	/**
+	 * @param class-string<Hookable> $class_name
+	 *
+	 * @return false|Hookable
+	 */
+	public function get_hookable_instance_by_class_name( $class_name ) {
+		if ( $this->registry === null ) {
+			return;
+		}
+
+		foreach ( $this->registry as $hookable_object ) {
+			if ( $hookable_object instanceof $class_name ) {
+				return $hookable_object;
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * Run hooks method on all hookable objects.
+	 */
+	protected function hooks_on_hookable_objects() {
+		if ( $this->registry === null ) {
+			return;
+		}
+
+		foreach ( $this->registry as $hookable_object ) {
+			if (
+				$hookable_object instanceof Conditional &&
+				! $hookable_object::is_needed()
+			) {
+				continue;
+			}
+
+			if ( $hookable_object instanceof HookablePluginDependant ) {
+				$hookable_object->set_plugin( $this );
+			}
+			$hookable_object->hooks();
+		}
+	}
+}