Award MyCRED points for members who sign up for Membership Level 1.

pmpromyCRED.php

<?php
/*
  Use this recipe in combination with MyCRED to award points to members when signing up 
  for Level 1 membership. This code gist could be customized to give points for another 
  membership level ID, award recurring points for each subscription payment, and more.
  
  MyCRED can be downloaded/configured here: https://wordpress.org/plugins/mycred/
*/

// Register Hook for PMPro Membership Points at Signup
function pmpromyCRED_register_my_custom_hook( $installed )
{
	$installed['pmpromyCRED_membership_level_1_checkout'] = array(
		'title'       => __( '%plural% for Membership Signup', 'pmpromycred' ),
		'description' => __( 'This hook awards points for users who sign up for Membership Level 1.', 'pmpromycred' ),
		'callback'    => array( 'pmpromyCRED_hook_class' )
	);
	return $installed;
}
add_filter( 'mycred_setup_hooks', 'pmpromyCRED_register_my_custom_hook' );

// setup myCRED PMPro Membership Hook Class on init
function pmpromyCRED_init() {
	//make sure myCRED is loaded
	if(!class_exists('myCRED_Hook'))
		return;
	
	class pmpromyCRED_hook_class extends myCRED_Hook {

		/**
		 * Construct
		 */
		function __construct( $hook_prefs, $type = 'mycred_default' ) {
			parent::__construct( array(
				'id'       => 'pmpromyCRED_membership_level_1_checkout',
				'defaults' => array(
					'creds'   => 10,
					'log'     => '%plural% for signing up for Membership Level 1'
				)
			), $hook_prefs, $type );
		}

		/**
		 * Hook into WordPress
		 */
		public function run() {
			add_action( 'pmpro_after_checkout',  array( $this, 'pmpromyCRED_membership_level_1_checkout' ) );
		}

		/**
		 * Check if the user qualifies for points
		 */
		public function pmpromyCRED_membership_level_1_checkout( $user_id ) {
			// Check if user is excluded (required)
			if ( $this->core->exclude_user( $user_id ) ) return;

			// Check to see if user has signed up for Membership Level 1
			if ( !pmpro_hasMembershipLevel('1', $user_id) ) return;

			// Make sure this is a unique event
			if ( $this->has_entry( 'pmpromyCRED_membership_level_1_checkout_complete', '', $user_id ) ) return;
			
			// Execute
			$this->core->add_creds(
				'pmpromyCRED_membership_level_1_checkout_complete',
				$user_id,
				$this->prefs['creds'],
				$this->prefs['log'],
				'',
				'',
				$this->mycred_type
			);
		}

		/**
		 * Add Settings
		 */
		 public function preferences() {
			// Our settings are available under $this->prefs
			$prefs = $this->prefs; ?>

			<!-- First we set the amount -->
			<label class="subheader"><?php echo $this->core->plural(); ?></label>
			<ol>
				<li>
					<div class="h2"><input type="text" name="<?php echo $this->field_name( 'creds' ); ?>" id="<?php echo $this->field_id( 'creds' ); ?>" value="<?php echo $this->core->format_number( $prefs['creds'] ); ?>" size="8" /></div>
				</li>
			</ol>
			<!-- Then the log template -->
			<label class="subheader"><?php _e( 'Log template', 'mycred' ); ?></label>
			<ol>
				<li>
					<div class="h2"><input type="text" name="<?php echo $this->field_name( 'log' ); ?>" id="<?php echo $this->field_id( 'log' ); ?>" value="<?php echo $prefs['log']; ?>" class="long" /></div>
				</li>
			</ol>
			<?php
		}

		/**
		 * Sanitize Preferences
		 */
		public function sanitise_preferences( $data ) {
			$new_data = $data;

			// Apply defaults if any field is left empty
			$new_data['creds'] = ( !empty( $data['creds'] ) ) ? $data['creds'] : $this->defaults['creds'];
			$new_data['log'] = ( !empty( $data['log'] ) ) ? sanitize_text_field( $data['log'] ) : $this->defaults['log'];

			return $new_data;
		}
	}
}
add_action('init', 'pmpromyCRED_init');

// Update the Confirmation Message with MyCRED Balance
function pmpromyCRED_pmpro_confirmation_message($message)
{
	global $current_user;
	if ( mycred_count_ref_id_instances( 'pmpromyCRED_membership_level_1_checkout_complete', 'mycred-hook-pmpromyCRED_membership_level_1_checkout', $current_user->ID ) > 0 )
	{
		$message .= '<hr /><h3>Points Awarded</h3>' . do_shortcode( '[mycred_history time="today" user_id="current"]' ) . '<hr />';
	}
	return $message;
}
add_filter("pmpro_confirmation_message", "pmpromyCRED_pmpro_confirmation_message");