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<?php
/**
 * Emails class file.
 *
 * @package Woodmart
 */

namespace XTS\Modules\Waitlist;

use XTS\Singleton;
use WC_Product;
use WC_Emails;
use stdClass;

/**
 * Emails class.
 */
class Emails extends Singleton {
	/**
	 * DB_Storage instance.
	 *
	 * @var DB_Storage
	 */
	protected $db_storage;

/**
	 * Constructor.
	 */
	public function init() {
		$this->db_storage = DB_Storage::get_instance();

add_action( 'init', array( $this, 'confirm_subscription' ) );
		add_action( 'init', array( $this, 'unsubscribe_user' ) );
		add_action( 'woocommerce_init', array( $this, 'load_wc_mailer' ) );
		add_filter( 'woocommerce_email_classes', array( $this, 'register_email' ) );

add_action( 'woocommerce_product_set_stock_status', array( $this, 'send_instock_email_emails' ), 10, 3 );
		add_action( 'woocommerce_variation_set_stock_status', array( $this, 'send_instock_email_emails' ), 10, 3 );

add_filter( 'woocommerce_prepare_email_for_preview', array( $this, 'prepare_email_for_preview' ) );
	}

/**
	 * Confirm subscription after the user has followed the link from email.
	 */
	public function confirm_subscription() {
		if ( ! isset( $_GET['action'] ) || 'woodmart_confirm_subscription' !== $_GET['action'] ||  ! isset( $_GET['token'] ) ) { //phpcs:ignore
			return;
		}

$redirect = apply_filters( 'woodmart_waitlist_after_confirm_subscription_redirect', remove_query_arg( array( 'action', 'token' ) ) );
		$token    = woodmart_clean( $_GET['token'] ); //phpcs:ignore

if ( $this->db_storage->confirm_subscription( $token ) ) {
			$data         = $this->db_storage->get_subscription_by_token( $token );
			$product_id   = ! empty( $data->variation_id ) ? $data->variation_id : $data->product_id;
			$current_lang = '';

if ( defined( 'WCML_VERSION' ) && defined( 'ICL_SITEPRESS_VERSION' ) ) {
				$current_lang = apply_filters( 'wpml_current_language', null );
				$product_id   = apply_filters( 'wpml_object_id', $product_id, 'product', false, $current_lang );
			}

$product = wc_get_product( $product_id );

do_action( 'woodmart_waitlist_send_subscribe_email', $data->user_email, $product, $current_lang );

wc_add_notice( esc_html__( 'Your waitlist subscription has been successfully confirmed.', 'woodmart' ), 'success' );
		}

wp_safe_redirect( $redirect );
		exit();
	}

/**
	 * Unsubscribe after the user has followed the link from email.
	 */
	public function unsubscribe_user() {
		if ( ! isset( $_GET['action'] ) || 'woodmart_waitlist_unsubscribe' !== $_GET['action'] ||  ! isset( $_GET['token'] ) ) { //phpcs:ignore
			return;
		}

$redirect = apply_filters( 'woodmart_waitlist_after_unsubscribe_redirect', remove_query_arg( array( 'action', 'token' ) ) );
		$token    = woodmart_clean( $_GET['token'] ); //phpcs:ignore.

$this->db_storage->unsubscribe_by_token( $token );

wc_add_notice( esc_html__( 'You have unsubscribed from this product mailing lists', 'woodmart' ), 'success' );
		wp_safe_redirect( $redirect );
		exit();
	}

/**
	 * Load woocommerce mailer.
	 */
	public function load_wc_mailer() {
		add_action( 'woodmart_waitlist_send_in_stock', array( 'WC_Emails', 'send_transactional_email' ), 10, 4 );
		add_action( 'woodmart_waitlist_send_subscribe_email', array( 'WC_Emails', 'send_transactional_email' ), 10, 4 );
		add_action( 'woodmart_waitlist_send_confirm_subscription_email', array( 'WC_Emails', 'send_transactional_email' ), 10, 4 );
	}

/**
	 * List of registered emails.
	 *
	 * @param array $emails List of registered emails.
	 *
	 * @return array
	 */
	public function register_email( $emails ) {
		include_once XTS_WAITLIST_DIR . 'emails/class-waitlist-email.php'; // Include parent waitlists class.

$emails['XTS_Email_Waitlist_Back_In_Stock']        = include XTS_WAITLIST_DIR . 'emails/class-instock-email.php';
		$emails['XTS_Email_Waitlist_Subscribe']            = include XTS_WAITLIST_DIR . 'emails/class-subscribe-email.php';
		$emails['XTS_Email_Waitlist_Confirm_Subscription'] = include XTS_WAITLIST_DIR . 'emails/class-confirm-subscription-email.php';

return $emails;
	}

/**
	 * Send a letter of return product to the store.
	 *
	 * @codeCoverageIgnore
	 *
	 * @param integer $product_id Product ID.
	 * @param string  $stock_status Stock status product.
	 * @param object  $product Data product.
	 *
	 * @return void
	 */
	public function send_instock_email_emails( $product_id, $stock_status, $product ) {
		if ( 'instock' !== $stock_status || in_array( $product->get_type(), array( 'variable', 'variable-subscription' ), true ) ) {
			return;
		}

$waitlists       = $this->db_storage->get_subscriptions_by_product( $product );
		$waitlists_chunk = array_chunk( $waitlists, apply_filters( 'woodmart_waitlist_scheduled_email_chunk', 50 ) );
		$schedule_time   = time() + 10;

foreach ( $waitlists_chunk as $waitlist_chunk ) {
			if ( ! wp_next_scheduled( 'woodmart_waitlist_send_in_stock', array( $waitlist_chunk ) ) ) {
				wp_schedule_single_event(
					$schedule_time,
					'woodmart_waitlist_send_in_stock',
					array( $waitlist_chunk )
				);
			}

$schedule_time += apply_filters( 'woodmart_waitlist_schedule_time', intval( woodmart_get_opt( 'waitlist_wait_interval', HOUR_IN_SECONDS ) ) ) + 1;
		}
	}

/**
	 * Prepare email for preview.
	 *
	 * @param object $preview_email Email object.
	 */
	public function prepare_email_for_preview( $preview_email ) {
		$emails = array(
			'XTS_Email_Waitlist_Back_In_Stock',
			'XTS_Email_Waitlist_Subscribe',
			'XTS_Email_Waitlist_Confirm_Subscription',
		);

if ( in_array( get_class( $preview_email ), $emails, true ) ) {
			$object = $this->get_dummy_product();

$preview_email->set_object( $object );
			$preview_email->recipient     = 'user_preview@example.com';
			$preview_email->user_name     = esc_html__( 'User Preview', 'woodmart' );
			$preview_email->product_image = $preview_email->get_product_image_html();
			$preview_email->product_price = $preview_email->get_product_price();
		}

if ( 'XTS_Email_Waitlist_Confirm_Subscription' === get_class( $preview_email ) ) {
			$preview_email->confirm_url = $preview_email->get_confirm_subscription_link();
		}

return $preview_email;
	}

/**
	 * Get a dummy product.
	 *
	 * @return WC_Product
	 */
	private function get_dummy_product() {
		$product = new WC_Product();
		$product->set_name( 'Dummy Product' );
		$product->set_price( 25 );

return $product;
	}
}

Emails::get_instance();