Adjust Subscription Delay by one month if it's the day before [PayFast Fix]

fix-issue-payfast-day-before-sub-delay.php

<?php
/**
 * This adjusts the subscription delay (and cost text) by one month if subscription is set to start the following day.
 * Fixes an issue specifically with PayFast not supporting subscriptions being created for the following day.
 * Add this code to your site by following this guide - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */


/**
 * Adjust Subscription Delay Start Date if set to tomorrow.
 * This fixes an issue for PayFast.
 * Adjust the start date to be one month ahead if the subscription delay is the day before.
 */
function modify_my_own_start_date( $start_date, $order, $subscription_delay ) {
    if ( ! function_exists( 'pmprosd_convert_date' ) ) {
        return $start_date;
    }
  
    $sub_delay_date = str_replace( 'T0:0:0', '', pmprosd_convert_date( $subscription_delay ) );
    if ( is_pmpro_sub_tomorrow( $sub_delay_date ) ) {
        $start_date = date( 'Y-m-d', strtotime( $start_date . "+ 1 Month" ) );
    }
    return $start_date;
}
add_filter( 'pmprosd_modify_start_date', 'modify_my_own_start_date', 10, 3 );

/**
 * Custom level cost text for Subscriptions Delay.
 * Unhook the default level cost text, and use our own logic (copy/paste)
 * Adjusts the subscription delay date on the fly (HTML text only).
 */
function modify_my_subscription_delay_text( $cost, $level ) {
  
    if ( ! function_exists( 'pmprosd_convert_date' ) ) {
        return $cost;
    }
  
    remove_filter("pmpro_level_cost_text", "pmprosd_level_cost_text", 10, 2);


    if ( ! empty( $level->code_id ) ) {
		$all_delays = pmpro_getDCSDs( $level->code_id );

		if ( ! empty( $all_delays ) && ! empty( $all_delays[ $level->id ] ) ) {
			$subscription_delay = $all_delays[ $level->id ];
		}
	} else {
		$subscription_delay = get_option( 'pmpro_subscription_delay_' . $level->id, '' );
	}

    // Converted date, let's adjust it too.
    $sub_delay_date = str_replace( 'T0:0:0', '', pmprosd_convert_date( $subscription_delay ) );
    if ( is_pmpro_sub_tomorrow( $sub_delay_date ) ) {
        $subscription_delay = date( 'Y-m-d', strtotime( $sub_delay_date . "+ 1 Month" ) );
    }


	$find    = array( 'Year.', 'Month.', 'Week.', 'Year</strong>.', 'Month</strong>.', 'Week</strong>.', 'Years.', 'Months.', 'Weeks.', 'Years</strong>.', 'Months</strong>.', 'Weeks</strong>.', 'payments.', 'payments</strong>.' );
	$replace = array( 'Year', 'Month', 'Week', 'Year</strong>', 'Month</strong>', 'Week</strong>', 'Years', 'Months', 'Weeks', 'Years</strong>', 'Months</strong>', 'Weeks</strong>', 'payments', 'payments</strong>' );

	if ( function_exists( 'pmpro_getCustomLevelCostText' ) ) {
		$custom_text = pmpro_getCustomLevelCostText( $level->id );
	} else {
		$custom_text = null;
	}

	if ( empty( $custom_text ) ) {
		if ( ! empty( $subscription_delay ) && is_numeric( $subscription_delay ) ) {
			$cost  = str_replace( $find, $replace, $cost );
			$cost .= ' after your <strong>' . $subscription_delay . ' day trial</strong>.';
		} elseif ( ! empty( $subscription_delay ) ) {
			$subscription_delay = pmprosd_convert_date( $subscription_delay );
			$cost               = str_replace( $find, $replace, $cost );
			$cost              .= ' starting ' . date_i18n( get_option( 'date_format' ), strtotime( $subscription_delay, current_time( 'timestamp' ) ) ) . '.';
		}
	}

	return $cost;
}
add_filter( 'pmpro_level_cost_text', 'modify_my_subscription_delay_text', 5, 2 );

/**
 * Check if Subscription Delay is happening tomorrow (1 day).
 * This is for PayFast (Doesn't support 1 day sub delays, only 2 days +)
 * @return bool If the sub delay is set for the following day.
 */
function is_pmpro_sub_tomorrow( $sub_delay_date ) {
    $r = false;
    $tomorrow = date( 'Y-m-d', strtotime( current_time( 'Y-m-d' ) . " + 1 day" ) );
    if ( $tomorrow === $sub_delay_date ) {
        $r = true;
    }
    return $r;
}