Add new contacts to an alternate CRM (Intercom) when a user registers, and apply tags in Intercom when tags are applied in the primary CRM

wpf-intercom-connect.php

<?php

// Put your intercom access token here
define( 'INTERCOM_ACCESS_TOKEN', 'aG9tOjyIyZmMxZDc2X2YxMzBfNDBhZV9hOTVjXzRhZDRlNzBiZWMyMzoxOjA=' );


// We'll save the alternate CRM in a global so it can be re-used if multiple API calls need to be made in the same request
global $intercom;


/**
 * Load Intercom and initialize the connection
 *
 * @return object Intercom CRM
 */

function wpf_connect_to_intercom() {

	global $intercom;

	if( is_object( $intercom ) ) {
		return $intercom;
	}

	require_once WPF_DIR_PATH . 'includes/crms/intercom/class-intercom.php';
	$intercom = new WPF_Intercom;
	$intercom->get_params( INTERCOM_ACCESS_TOKEN );

	return $intercom;

}


/**
 * Get an Intercom contact ID for a user, or look it up
 *
 * @return mixed Contact ID if found, "false" if not
 */

function wpf_get_intercom_contact_id( $user_id ) {

	$contact_id = get_user_meta( $user_id, 'wpf_intercom_contact_id', true );
	
	if( ! empty( $contact_id ) ) {
		
		return $contact_id;

	} else {
		
		$intercom = wpf_connect_to_intercom();

		$user = get_user_by( 'id', $user_id );
		$contact_id = $intercom->get_contact_id( $user->user_email );

		if( ! is_wp_error( $contact_id ) && $contact_id != false ) {

			update_user_meta( $user_id, 'wpf_intercom_contact_id', $contact_id );
			return $contact_id;

		} else {

			return false;

		}

	}

}


/**
 * Add a new contact to Intercom at registration and optionally apply tags
 *
 * @return void
 */

function wpf_add_to_intercom( $user_id, $contact_id, $post_data ) {

	$intercom = wpf_connect_to_intercom();

	// Check if there's already a contact record in Intercom
	$contact_id = $intercom->get_contact_id( $post_data['user_email'] );

	if( ! is_wp_error( $contact_id ) && $contact_id == false ) {

		// You have to manually specify Intercom internal fields here, since the WPF Settings >> Contact fields tab is configured for ActiveCampaign
		$contact_data = array(
			'email'		=> $post_data['user_email'],
			'name'		=> $post_data['first_name'] . ' ' . $post_data['last_name']
		);

		// "false" in the second parameter tells it not to use the field mapping set up in the WP Fusion settings
		$contact_id = $intercom->add_contact( $contact_data, false );

	}

	// Save the contact ID for later reference
	update_user_meta( $user_id, 'wpf_intercom_contact_id', $contact_id );

	// Now you can apply tags
	$intercom->apply_tags( array( 'Tag One', 'Tag 2' ), $contact_id );

}

add_action( 'wpf_user_created', 'wpf_add_to_intercom', 10, 3 );


/**
 * Apply tags in Intercom when tags are applied in WP Fusion
 *
 * @return void
 */

function wpf_apply_tags_in_intercom( $user_id, $tags ) {

	$intercom = wpf_connect_to_intercom();

	$contact_id = wpf_get_intercom_contact_id( $user_id );

	if( $contact_id !== false ) {
		$intercom->apply_tags( $tags, $contact_id );
	}

}

add_action( 'wpf_tags_applied', 'wpf_apply_tags_in_intercom', 10, 2 );