public function __construct() {

		add_filter( 'wp_untrash_post_status', array( $this, 'set_untrash_status' ), 10, 3 );

		// This action adds our lifterlms specific actions when order & transaction statuses change.
		add_action( 'transition_post_status', array( $this, 'transition_status' ), 10, 3 );

		// This action adds lifterlms specific action when an order is deleted, just before the WP post postmetas are removed.
		add_action( 'before_delete_post', array( $this, 'on_delete_order' ) );

		// This action is meant to do specific actions on orders when an enrollment, with an order as trigger, is deleted.
		add_action( 'llms_user_enrollment_deleted', array( $this, 'on_user_enrollment_deleted' ), 10, 3 );

		// Transaction status changes cascade up to the order to change the order status.
		add_action( 'lifterlms_transaction_status_failed', array( $this, 'transaction_failed' ), 10, 1 );
		add_action( 'lifterlms_transaction_status_refunded', array( $this, 'transaction_refunded' ), 10, 1 );
		add_action( 'lifterlms_transaction_status_succeeded', array( $this, 'transaction_succeeded' ), 10, 1 );

		// Status changes for orders to enroll students and trigger completion actions.
		add_action( 'lifterlms_order_status_completed', array( $this, 'complete_order' ), 10, 2 );
		add_action( 'lifterlms_order_status_active', array( $this, 'complete_order' ), 10, 2 );

		// Status changes to pending cancel.
		add_action( 'lifterlms_order_status_pending-cancel', array( $this, 'pending_cancel_order' ), 10, 1 );

		// Status changes for orders to unenroll students upon purchase.
		add_action( 'lifterlms_order_status_refunded', array( $this, 'error_order' ), 10, 1 );
		add_action( 'lifterlms_order_status_cancelled', array( $this, 'error_order' ), 10, 1 );
		add_action( 'lifterlms_order_status_expired', array( $this, 'error_order' ), 10, 1 );
		add_action( 'lifterlms_order_status_failed', array( $this, 'error_order' ), 10, 1 );
		add_action( 'lifterlms_order_status_on-hold', array( $this, 'error_order' ), 10, 1 );
		add_action( 'lifterlms_order_status_trash', array( $this, 'error_order' ), 10, 1 );

		// Detect a product deletion while processing a recurring charge.
		add_action( 'llms_order_recurring_charge_aborted_product_deleted', array( $this, 'error_order' ), 10, 1 );

		/**
		 * Scheduler Actions
		 */

		// Charge recurring payments.
		add_action( 'llms_charge_recurring_payment', array( $this, 'recurring_charge' ), 10, 1 );

		// Expire access plans.
		add_action( 'llms_access_plan_expiration', array( $this, 'expire_access' ), 10, 1 );

	}