rcp_filters.php

<?php

/**
 * Filter the subscriptions that can be used in the upgrade path
 * original filter: https://docs.google.com/document/d/19-H7iF-6M_xuKQIF_V6VdeuwXyXaGgWAU9zrJnxavOw/edit
 */
function trm_filter_subscriptions( $subscriptions, $user_id ) {
	// make sure the user is active and get the subscription ID
	$user_subscription = ( rcp_is_recurring( $user_id ) && rcp_is_active( $user_id ) && 'cancelled' !== rcp_get_status() ) ? rcp_get_subscription_id( $user_id ) : '';
	$subscriptions     = rcp_get_subscription_levels( 'active' );

	foreach ( $subscriptions as $key => $subscription ) {
		// remove the user's current subscription from the list 
		if ( $user_subscription == $subscription->id ) {
			unset( $subscriptions[ $key ] );
		}

		// remove any other subscriptions that should not show on the upgrade/downgrade path
		if ( in_array( $subscription->id, array() ) ) {
			unset( $subscription[ $key ] );
		}
	}
}

add_filter( 'rcp_get_upgrade_paths', 'trm_filter_subscriptions', 10, 2 );

function trm_remove_level_fee( $level ) {
	if ( ! is_active() ) {
		return $level;
	}

	$level->fee = 0;

	return $level;
}

apply_filter( 'rcp_get_level', 'trm_remove_level_fee' );

/**
 * Remove fees from levels if user is active
 * https://github.com/restrictcontentpro/restrict-content-pro/blob/master/includes/class-rcp-levels.php
 */
function trm_remove_levels_fee( $levels ) {
	if ( ! is_active() ) {
		return $level;
	}

	foreach ( $levels as $key => $level ) {
		$levels[ $key ] = trm_remove_level_fee( $level );
	}

	return $feeless_levels;
}

apply_filter( 'rcp_get_levels', 'trm_remove_levels_fee' );