Sample WooCommerce Points & Rewards 3rd Party Plugin Integration

gistfile1.php

<?php

// Add the action setting
add_filter( 'wc_points_rewards_action_settings', 'points_rewards_newsletter_action_settings' );

function points_rewards_newsletter_action_settings( $settings ) {
  
	$settings[] = array(
		'title'    => __( 'Points earned for newsletter signup' ),
		'desc_tip' => __( 'Enter the amount of points earned when a customer signs up for a newsletter via MailChimp.' ),
		'id'       => 'wc_points_rewards_mailchimp_newsletter_signup',
	);

	return $settings;
}

// add the event descriptions
add_filter( 'wc_points_rewards_event_description', 'add_points_rewards_newsletter_action_event_description', 10, 3 );

function add_points_rewards_newsletter_action_event_description( $event_description, $event_type, $event ) {

	$points_label = get_option( 'wc_points_rewards_points_label' );

	// set the description if we know the type
	switch ( $event_type ) {
		case 'mailchimp-newsletter-signup': $event_description = sprintf( __( '%s earned for newsletter signup' ), $points_label ); break;
	}

	return $event_description;
}

// perform the event (of course this depends on your particular plugin/action)
add_action( 'wp_mailchimp_new_newsletter_signup', 'points_rewards_newsletter_signup_action' );

function points_rewards_newsletter_signup_action( $newsletter_id ) {

	// can't give points to a user who isn't logged in
	if ( ! is_user_logged_in() )
		return;

	// get the points configured for this custom action
	$points = get_option( 'wc_points_rewards_mailchimp_newsletter_signup' );

	if ( ! empty( $points ) ) {
		// arbitrary data can be passed in with the points change, this will be persisted to the points event log
		$data = array( 'newsletter_id' => $newsletter_id );
		  
		WC_Points_Rewards_Manager::increase_points( get_current_user_id(), $points, 'mailchimp-newsletter-signup', $data );
	}
}