WooCommerce Email Generator

<?php
// Generated with WP CodeKit — powered by GrowQuest (https://growquest.io).
/**
 * Plugin Name:       Loyalty points earned email
 * Description:       Registers the acme_loyalty_earned transactional email.
 * Version:           1.0.0
 * Requires PHP:      7.4
 * Requires Plugins:  woocommerce
 * Text Domain:       acme
 */

defined( 'ABSPATH' ) || exit;

/**
 * Declare the class once WooCommerce's own email base class exists.
 */
function acme_email_init() {
	if ( class_exists( 'Acme_Loyalty_Earned_Email' ) ) {
		return;
	}

	class Acme_Loyalty_Earned_Email extends WC_Email {

	public function __construct() {
		$this->id             = 'acme_loyalty_earned';
		$this->customer_email = true;
		$this->title          = __( 'Loyalty points earned', 'acme' );
		$this->description    = __( 'Sent to the customer once their order is marked complete, showing the points they earned.', 'acme' );
		$this->heading        = __( 'You earned loyalty points!', 'acme' );
		$this->subject        = __( 'You earned points on order #{order_number}', 'acme' );

		$this->template_html  = 'emails/acme-loyalty-earned.php';
		$this->template_plain = 'emails/plain/acme-loyalty-earned.php';
		$this->template_base  = plugin_dir_path( __FILE__ ) . 'templates/';

		add_action( 'woocommerce_order_status_completed', array( $this, 'trigger' ), 10, 2 );

		parent::__construct();

	}

	/**
	 * The settings fields, keyed by option name.
	 */
	public function init_form_fields() {
		$this->form_fields = array(
		'enabled' => array(
			'title'   => __( 'Enable/Disable', 'acme' ),
			'type'    => 'checkbox',
			'label'   => __( 'Enable this email notification', 'acme' ),
			'default' => 'yes',
		),

		'subject' => array(
			'title'       => __( 'Subject', 'acme' ),
			'type'        => 'text',
			'default'     => '',
			'placeholder' => __( 'You earned points on order #{order_number}', 'acme' ),
			'desc_tip'    => true,
		),

		'heading' => array(
			'title'       => __( 'Email heading', 'acme' ),
			'type'        => 'text',
			'default'     => '',
			'placeholder' => __( 'You earned loyalty points!', 'acme' ),
			'desc_tip'    => true,
		),
		);
	}

	/**
	 * Fires on woocommerce_order_status_completed. Sends the email if it is enabled and there is a recipient.
	 *
	 * @param int      $order_id Order ID.
	 * @param WC_Order $order    Order object, when core already has it loaded.
	 */
	public function trigger( $order_id, $order = false ) {
		$this->setup_locale();

		if ( $order_id && ! is_a( $order, 'WC_Order' ) ) {
			$order = wc_get_order( $order_id );
		}

		if ( is_a( $order, 'WC_Order' ) ) {
			$this->object    = $order;
			$this->recipient = $this->object->get_billing_email();
		}

		if ( ! $this->is_enabled() || ! $this->get_recipient() ) {
			$this->restore_locale();
			return;
		}

		$this->send( $this->get_recipient(), $this->get_subject(), $this->get_content(), $this->get_headers(), $this->get_attachments() );

		$this->restore_locale();
	}

	/**
	 * The HTML version, rendered through the plugin's own template file.
	 */
	public function get_content_html() {
		return wc_get_template_html(
			$this->template_html,
			array(
			'order'         => $this->object,
			'email_heading' => $this->get_heading(),
			'sent_to_admin' => false,
			'plain_text'    => false,
			'email'         => $this,
		),
			'',
			$this->template_base
		);
	}

	/**
	 * The plain-text version.
	 */
	public function get_content_plain() {
		return wc_get_template_html(
			$this->template_plain,
			array(
			'order'         => $this->object,
			'email_heading' => $this->get_heading(),
			'sent_to_admin' => false,
			'plain_text'    => true,
			'email'         => $this,
		),
			'',
			$this->template_base
		);
	}
	}
}
add_action( 'plugins_loaded', 'acme_email_init' );

/**
 * Register it so it appears under WooCommerce → Settings → Emails.
 *
 * @param array $emails Existing email classes, keyed by class name.
 * @return array
 */
function acme_add_email_class( $emails ) {
	$emails['Acme_Loyalty_Earned_Email'] = new Acme_Loyalty_Earned_Email();

	return $emails;
}
add_filter( 'woocommerce_email_classes', 'acme_add_email_class' );