Limit the maximum number of coupons/referrals a user can earn

READ FIRST: This code works on the 2.0+ version of a plugin. Also, this code needs to be added at the end of the functions.php file. If you are familiar with editing functions.php, feel free to continue reading. If you haven’t done this before, adding this code in the wrong place might bring the site down and the only way to access it is by editing functions.php file again via FTP. Feel free to contact us if you need help!

If for some reason you want to limit the number of coupons one user can earn via the WooCommerce Refer a Friend plugin, add the code below to functions.php file. Of course, change the “20” in the code to the number of your choice.

function gens_limit_number_of_coupons($raf_info,$order,$referrer_id) {
    $num_referrals = intval(get_user_meta($referrer_id, "gens_num_friends", true));
    if($num_referrals > 20) {
    	$raf_info = array("info" => "User has reached maximum number of referred customers.", "generate" => "false", "increase_referrals" => "false");
    }
    return $raf_info;
}
add_filter( 'gens_raf_order_info', 'gens_limit_number_of_coupons',10,3);

If you would like to hide the referral link after this, add this code, as well:

add_filter('wpgens_raf_link','gens_raf_link',10,3);
function gens_raf_link($raf_link, $referral_id, $type) {
	$user_id = get_current_user_id();
        $num_referrals = intval(get_user_meta($user_id, "gens_num_friends", true));
        if($num_referrals > 20) {
	  return "You have reached maximum number of customers you can refer.";
        }
    return $raf_link;
}