<?php
/**
 * Yoast SEO: Search index purge plugin file.
 *
 * @package   WPSEO\Main
 * @copyright Copyright (C) 2018, Yoast BV - support@yoast.com
 * @license   http://www.gnu.org/licenses/gpl-3.0.html GNU General Public License, version 3 or higher
 */

/**
 * The main class to initialize everything.
 */
final class Yoast_Purge_Plugin {

	/**
	 * List of integrations.
	 *
	 * @var array
	 */
	private $integrations = array();

	/**
	 * Yoast SEO requirement checker.
	 *
	 * @var Yoast_Purge_Require_Yoast_SEO_Version
	 */
	private $requirement_checker;

	/**
	 * Yoast Purge options handler.
	 *
	 * @var Yoast_Purge_Options
	 */
	private $options;

	/**
	 * Initializes the plugin.
	 */
	public function __construct() {
		$this->requirement_checker = new Yoast_Purge_Require_Yoast_SEO_Version();
		$this->options             = new Yoast_Purge_Options();
	}

	/**
	 * Adds the integrations that the plugin needs.
	 */
	public function add_integrations() {
		$this->integrations = array(
			new Yoast_Purge_Upgrade( $this->options ),
		);

		// Add integrations that handle the purging of the attachment pages.
		if ( $this->options->is_attachment_page_purging_active() ) {
			$this->integrations = array_merge(
				$this->integrations,
				array(
					new Yoast_Purge_Attachment_Page_Server(),
					new Yoast_Purge_Media_Settings_Tab_Content(),
					new Yoast_Purge_Attachment_Sitemap( $this->options ),
					new Yoast_Purge_Control_Yoast_SEO_Settings()
				)
			);
		}
	}

	/**
	 * Registers hooks to WordPress.
	 */
	public function register_hooks() {
		// Always show notifications, even if the rest cannot be activated.
		$this->requirement_checker->register_hooks();
		if ( ! $this->requirement_checker->has_required_version() ) {
			return;
		}

		foreach ( $this->integrations as $integration ) {
			$integration->register_hooks();
		}
	}

	/**
	 * Retrieves the registered integrations.
	 *
	 * @return array
	 */
	public function get_integrations() {
		return $this->integrations;
	}

	/**
	 * Executes everything we need on activation.
	 *
	 * @deprecated 1.1.0
	 */
	public function activate() {
		// Intentionally left empty.
	}
}