Generate woocommerce coupon after gravity form submission - php

Question

I want a user to enter their email in a gravity form and after submission they are emailed a unique coupon code that expires after two weeks. I have cobble together code from a few other solutions and I am successful at creating the unique code. But I can't get it to create the coupon in woocommerce.. Not being a PHP master I know I'm missing something obvious.
//* Define options/constants
define( 'ENGWP_FORM_ID', 276 ); // The ID of the form (integer)
define( 'ENGWP_SOURCE_FIELD_ID', 2 ); // The ID of the form field holding the code (integer)
define( 'ENGWP_CODE_LENGTH', 12 ); // Length of code (integer)
define( 'ENGWP_CODE_CHARS', '1234567890QWERTYUIOPASDFGHJKLZXCVBNM' ); // Available character for the code; default 0-9 and uppercase letters (string)
define( 'ENGWP_CODE_PREFIX', '17-' ); // Custom prefix for the code (string); default empty
define( 'ENGWP_DISCOUNT_TYPE', 'percent' ); // 'flat' or 'percent' (string)
define( 'ENGWP_DISCOUNT_AMOUNT', 10 ); // Value of discount (integer); $ if 'type' is 'flat' and % if 'type' is 'percent'
define( 'ENGWP_MAX_USES', 1 ); // Maximum number of uses per customer (integer)
define( 'ENGWP_MIN_PRICE', 0 ); // Minimum price for discount to apply (integer); default none
define( 'ENGWP_PRODUCT_REQS', '' ); // A comma-separated list of product IDs (string) the coupons apply to
define( 'ENGWP_REQS_CONDITION', '' ); // How to apply the discount to those products (string); accepts 'any' (at least one product ID must be in the cart) or 'all' (all products must be in the cart)
define( 'ENGWP_SINGLE_USE', 'use_once' ); // Whether the coupons generated can be used more than once by a single customer; default is set to one-time usage but can be set to false (boolean) for allowing multiple uses
define( 'ENGWP_EXCLUDE_PRODUCTS', '' ); // A comma-separated list of product IDs (string) to exclude from discount-applicability
$start_date = ''; # no date
// $start_date = '01/01/1900'; # static date
// $start_date = date( 'm/d/Y', strtotime("yesterday") );
$exp_date = date( 'm/d/Y', strtotime("+14 days") );
// $exp_date = '01/01/1900'; # static date
// $exp_date = ''; # no date
class GW_Create_Coupon {
public function __construct( $args = array() ) {
// set our default arguments, parse against the provided arguments, and store for use throughout the class
$this->_args = wp_parse_args( $args, array(
'form_id' => false,
'source_field_id' => false,
'plugin' => 'wc',
'amount' => 0,
'type' => '',
'meta' => array()
) );
// do version check in the init to make sure if GF is going to be loaded, it is already loaded
add_action( 'init', array( $this, 'init' ) );
}
public function init() {
// make sure we're running the required minimum version of Gravity Forms
if( ! property_exists( 'GFCommon', 'version' ) || ! version_compare( GFCommon::$version, '1.8', '>=' ) ) {
return;
}
add_action( 'gform_after_submission', array( $this, 'create_coupon' ), 10, 2 );
}
public function create_coupon( $entry, $form ) {
if( ! $this->is_applicable_form( $form ) ) {
return;
}
$coupon_code = rgar( $entry, $this->_args['source_field_id'] );
$amount = $this->_args['amount'];
$type = $this->_args['type'];
$plugin_func = array( $this, sprintf( 'create_coupon_%s', $this->_args['plugin'] ) );
if( is_callable( $plugin_func ) ) {
call_user_func( $plugin_func, $coupon_code, $amount, $type );
}
}
public function create_coupon_wc( $coupon_code, $amount, $type ) {
$coupon = array(
‘post_title’ => $coupon_code,
‘post_content’ => ”,
‘post_status’ => ‘publish’,
‘post_author’ => 1,
‘post_type’ => ‘shop_coupon’
);
$new_coupon_id = wp_insert_post( $coupon );
$meta = wp_parse_args( $this->_args[‘meta’], array(
‘discount_type’ => $type,
‘coupon_amount’ => $amount,
‘individual_use’ => ‘yes’,
‘product_ids’ => ”,
‘exclude_product_ids’ => ”,
‘usage_limit’ => ‘1’,
‘expiry_date’ => ”,
‘apply_before_tax’ => ‘no’,
‘free_shipping’ => ‘no’,
‘exclude_sale_items’ => ‘no’,
‘product_categories’ => ”,
‘exclude_product_categories’ => ”,
‘minimum_amount’ => ”,
‘customer_email’ => ”
) );
foreach( $meta as $meta_key => $meta_value ) {
update_post_meta( $new_coupon_id, $meta_key, $meta_value );
}
}
public function create_coupon_edd( $coupon_code, $amount, $type ) {
if( ! is_callable( 'edd_store_discount' ) ) {
return;
}
$meta = wp_parse_args( $this->_args['meta'], array(
'name' => $coupon_code,
'code' => $coupon_code,
'type' => $type,
'amount' => $amount,
'excluded_products' => array(),
'expiration' => '',
'is_not_global' => false,
'is_single_use' => false,
'max_uses' => '',
'min_price' => '',
'product_condition' => '',
'product_reqs' => array(),
'start' => '',
'uses' => '',
) );
// EDD will set it's own defaults in the edd_store_discount() so let's filter out our own empty defaults (their just here for easier reference)
$meta = array_filter( $meta );
// EDD takes a $details array which has some different keys than the meta, let's map the keys to the expected format
$edd_post_keys = array(
'max_uses' => 'max',
'product_reqs' => 'products',
'excluded_products' => 'excluded-products',
'is_not_global' => 'not_global',
'is_single_use' => 'use_once'
);
foreach( $meta as $key => $value ) {
$mod_key = rgar( $edd_post_keys, $key );
if( $mod_key ) {
$meta[$mod_key] = $value;
}
}
edd_store_discount( $meta );
}
function is_applicable_form( $form ) {
$form_id = isset( $form['id'] ) ? $form['id'] : $form;
return $form_id == $this->_args['form_id'];
}
}
//* Instantiate the class for EDD
new GW_Create_Coupon( array(
'form_id' => ENGWP_FORM_ID,
'source_field_id' => ENGWP_SOURCE_FIELD_ID,
'amount' => ENGWP_DISCOUNT_AMOUNT,
'type' => ENGWP_DISCOUNT_TYPE,
'meta' => array(
'excluded_products' => array( ENGWP_EXCLUDE_PRODUCTS ),
'expiration' => $exp_date,
'is_not_global' => 'not_global',
'is_single_use' => ENGWP_SINGLE_USE,
'max_uses' => ENGWP_MAX_USES,
'min_price' => ENGWP_MIN_PRICE,
'product_condition' => ENGWP_REQS_CONDITION,
'product_reqs' => array( ENGWP_PRODUCT_REQS ),
'start' => $start_date,
)
) );
/**
* Generate the random codes to be used for the EDD discounts
*/
//* Generates and returns the code
add_filter( 'gform_field_value_uuid', 'gw_generate_unique_code' );
function gw_generate_unique_code() {
$length = ENGWP_CODE_LENGTH;
$chars = ENGWP_CODE_CHARS;
$prefix = ENGWP_CODE_PREFIX;
$unique = '';
$chars_length = strlen( $chars )-1;
for( $i = 0 ; $i < $length ; $i++ ) {
$unique .= $chars[ rand( 0, $chars_length ) ];
}
do {
$unique = $prefix . str_shuffle( $unique );
} while ( !gw_check_unique_code( $unique ) );
return $unique;
}
//* Checks to make sure the code generated is unique (not already in use)
function gw_check_unique_code( $unique ) {
global $wpdb;
$table = $wpdb->prefix . 'rg_lead_detail';
$form_id = ENGWP_FORM_ID; // update to the form ID your unique id field belongs to
$field_id = ENGWP_SOURCE_FIELD_ID; // update to the field ID your unique id is being prepopulated in
$result = $wpdb->get_var( "SELECT value FROM $table WHERE form_id = '$form_id' AND field_number = '$field_id' AND value = '$unique'" );
if ( empty ( $result ) ) {
return true;
} else return false;
}

Answer 1

You can use WC_Coupon to generate a coupon code. try the below code.
add_action( 'gform_after_submission', array( $this, 'create_coupon' ), 10, 2 );
public function create_coupon( $entry, $form ){
$coupon_code = rgar( $entry, $this->_args['source_field_id'] );
$date_expires = date('Y-m-d', strtotime('+14 days'));
$discount_type = 'fixed_cart'; // 'store_credit' doesn't exist
$coupon = new WC_Coupon();
$coupon->set_code($coupon_code);
//the coupon discount type can be 'fixed_cart', 'percent' or 'fixed_product', defaults to 'fixed_cart'
$coupon->set_discount_type($discount_type);
//the discount amount, defaults to zero
$coupon->set_amount($amount );
$coupon->set_date_expires( $date_expires );
//save the coupon
$coupon->save();
}