Automatically email a discount code to new ActiveCampapign subscribers.

edd-discounts-subscribers.php

<?php
/**
 * Plugin Name: EDD - Discounts for Subscribers
 * Plugin URI: https://www.nosegraze.com/subscribers-edd-discount-code
 * Description: Automatically email a discount code to new ActiveCampaign subscribers.
 * Version: 1.0
 * Author: Nose Graze
 * Author URI: https://www.nosegraze.com
 * License: GPL2
 * 
 * @package edd-discounts-subscribers
 * @copyright Copyright (c) 2016, Nose Graze Ltd.
 * @license GPL2+
 * 
 * INSTRUCTIONS:
 * 
 * This plugin isn't meant to be installed as-is. You need to edit it quite a bit to
 * get it working with your settings, name, email, etc.
 * 
 * First you need to set up a webhook in ActiveCampaign in the "Automations" section.
 * My trigger is when a new person subscribes to my mailing list, but you can choose any
 * trigger you want. Then the action should be a webhook. Have it POST data to this URL:
 * http://yoursite.com/?trigger-special-discount=true&discount-key=JkbYRHvWAoddmVUTK1u8RH8V
 * Replace that 'discount-key' value with your own unique string of numbers and letters. You'll
 * need to enter that again in the code below.
 * 
 * Then comb through the plugin and edit any of the values to suit your needs.
 */

// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Create and send 10% off coupon code when signing up for mailing list.
 *
 * @since 1.0
 * @return void
 */
function ng_edd_discounts_subscribers_send_code() {
    	// Note: Change the 'discount-key' value to your own unique key.
	if ( ! isset( $_GET['trigger-special-discount'] ) || ! isset( $_GET['discount-key'] ) || $_GET['discount-key'] != 'JkbYRHvWAoddmVUTK1u8RH8V' || ! function_exists( 'edd_store_discount' ) ) {
		return;
	}

	// Now check to make sure we got data from AC.
	if ( ! isset( $_POST['contact'] ) || ! isset( $_POST['contact']['email'] ) ) {
		return;
	}

	$contact = $_POST['contact'];
	$email   = wp_strip_all_tags( $contact['email'] );

    	// There's no reason it wouldn't be an email, but just in case...
	if ( ! is_email( $email ) ) {
		return;
	}

	global $wpdb;
	/*
	 * This is the name that will appear in the admin panel for your reference only. You can change it if you want.
	 * The two % signs are intentional. Only one will show up though.
	 */
	$discount_name = sprintf( '10%% off for %s', $email );

	$query   = "
        SELECT      *
        FROM        $wpdb->posts
        WHERE       $wpdb->posts.post_title LIKE '$discount_name%'
        AND         $wpdb->posts.post_type = 'edd_discount'
        ORDER BY    $wpdb->posts.post_title
";
	$results = $wpdb->get_results( $query );

	// Already created a discount for this email - bail.
	if ( is_array( $results ) && count( $results ) ) {
		return;
	}

	$timestamp     = time();
	$numbers_array = str_split( $timestamp . rand( 10, 99 ) );
	$letters_array = array_combine( range( 1, 26 ), range( 'a', 'z' ) );
	$final_code    = '';

	foreach ( $numbers_array as $key => $value ) {
		$final_code .= $letters_array[ $value ];
	}

	// Arguments for the discount code. You can edit these.
	$discount_args = array(
		'code'     => $final_code,
		'name'     => $discount_name,
		'status'   => 'active',
		'max'      => 1,            // Max number of uses.
		'amount'   => 10,           // Dollar or percentage amount to deduct.
		'type'     => 'percent',    // 'percent' or 'flat'
		'use_once' => true,         // Only one use per customer. Kind of irrelevant if you chose '1' for max use above, but whatevs.
	);

	edd_store_discount( $discount_args );

    	// If they entered a first name, use that. Otherwise use "there".
	$first_name = ( array_key_exists( 'first_name', $contact ) && ! empty( $contact['first_name'] ) ) ? $contact['first_name'] : 'there';

    	// Actual welcome email. You probably want to edit this.
	$message = sprintf(
		"<p>Hey %s!</p>
		<p>Thanks so much for signing up for my list. As a thank you, here's a 10%% off discount code you can use on your next purchase in my shop:</p>
		<p><strong>%s</strong></p>
		<p>Enter this code at checkout to remove 10%% from your total.</p>
		<p>Have a great day!</p>
		<p>- Your Name</p>",
		esc_html( $first_name ),
		esc_html( $final_code )
	);

	$headers = array(
		'Content-Type: text/html; charset=UTF-8',
		'From: Your Name <noreply@yoursite.com>' // Be sure to change this to your name/email.
	);

    	// Subject line is the second bit in quotes.
	wp_mail( $email, '10% off Discount', $message, $headers );
}

add_action( 'init', 'ng_edd_discounts_subscribers_send_code' );