Add_Item::handle_request( $args )

	public function handle_request( $args ) {
		$redirect = get_the_permalink( get_option( Wishlist_Page::NAME, 0 ) );
		try {
			$submission = $this->sanitize_request( $args, $_REQUEST );
			$wishlist   = $this->get_customer_wishlist( get_current_user_id(), $submission['wishlist_id'] );
			$redirect   = $wishlist->user_url();
			$product_id = (int) $submission['product_id'];

			$this->wishlists->addWishlistItems( $submission['wishlist_id'], new WishlistAddItemsRequest( [
				'items' => [
					new WishlistItem( [
						'product_id' => $product_id,
					] ),
				],
			] ) );

			try {
				// Try to link to the product single in the message
				$product = Product::by_product_id( $product_id );
				$url     = get_the_permalink( $product->post_id() );
				$title   = sprintf( '<a href="%s">%s</a>', esc_url( $url ), wp_strip_all_tags( get_the_title( $product->post_id() ) ) );
				$message = sprintf( __( '"%s" added to Wish List', 'bigcommerce' ), $title );
			} catch ( Product_Not_Found_Exception $e ) {
				$message = __( 'Item added to Wish List', 'bigcommerce' );
			}

			do_action( 'bigcommerce/form/success', $message, $submission, $redirect, [] );
		} catch ( \Exception $e ) {
			do_action( 'bigcommerce/form/error', new \WP_Error( $e->getCode(), $e->getMessage() ), $_POST, $redirect, [] );
		}
	}