Preliminary Business Hour Notification Example

functions.php

<?php
add_filter( 'gravityflow_step_schedule_timestamp', 'schedule_business_hours', 10, 3 );
function schedule_business_hours( $schedule_timestamp, $schedule_type, $step ) {

	//Ensure you are only adjusting the desired form/step
	if ( $step->get_id() !== 74 ) {
		return $schedule_timestamp;
	}

	gravity_flow()->log_debug( __METHOD__ . '(): Original Scheduled: ' . date( 'Y-m-d H:i:s', $schedule_timestamp ) );

	//Define for your business irrespective of time-zone
	$start_hour = 9;
	$end_hour = 17;

	//Wed Mar 21 @ 10:30 - 1521642600
	//$current_timestamp = 1521642600;

	//Wed Mar 21 @ 21:00 - 1521680400
	//$current_timestamp = 1521680400;

	//Fri Mar 23 @ 22:15 - 1521857700
	//$current_timestamp = 1521857700;

	//Sat Mar 24 @ 12:00 - 1521907200
	//$current_timestamp = 1521907200;

	//Sun Mar 25 @ 20:00 - 1522022400
	//$current_timestamp = 1522022400;

	//Mon Mar 26 @ 05:15 - 1522055700
	//$current_timestamp = 1522055700;

	//Mon Mar 26 @ 09:30 - 1522071000
	//$current_timestamp = 1522071000;
	
	$current_timestamp = time();
	$tz = get_option('timezone_string');
	$dt = new DateTime("now", new DateTimeZone($tz));
	$dt->setTimestamp($current_timestamp);

	$current_hour = $dt->format('H');
	$current_day_of_week = $dt->format('N');

	gravity_flow()->log_debug( __METHOD__ . '(): Current Timestamp: ' . print_r( $current_timestamp, true ) );
	gravity_flow()->log_debug( __METHOD__ . '(): Current Time: ' . $dt->format('d.m.Y, H:i') );
	gravity_flow()->log_debug( __METHOD__ . '(): Current Hour: ' . $current_hour );
	gravity_flow()->log_debug( __METHOD__ . '(): Current Day Of Week: ' . $current_day_of_week );
	gravity_flow()->log_debug( __METHOD__ . '(): Start / End: ' . $start_hour . ' / ' . $end_hour );

	//Weekday + Business Hours
	if ( in_array( $current_day_of_week, array( 1, 2, 3, 4, 5 ) ) && $current_hour >= $start_hour && $current_hour <= $end_hour ) {
		gravity_flow()->log_debug( __METHOD__ . '(): Business Hour Request');
		return $schedule_timestamp;
	}
	
	gravity_flow()->log_debug( __METHOD__ . '(): Outside Business Hour Request' );
	
	//Weekday + Before Business Hours
	if( in_array( $current_day_of_week, array( 1, 2, 3, 4, 5 ) ) && $current_hour <= $start_hour ) {
		$delay_hours = $start_hour - $current_hour;

	//Mon to Thurs + After Business Hours
	} else if( in_array( $current_day_of_week, array( 1, 2, 3, 4 ) ) && $current_hour >= $end_hour ) {
		$delay_hours = ( 23 - $current_hour ) + 1 + $start_hour;

	//Friday + After Business Hours
	} else if( in_array( $current_day_of_week, array( 5 ) ) && $current_hour >= $end_hour ) {
		$delay_hours = ( 23 - $current_hour ) + 1 + $start_hour + 48;

	//Saturday 
	} else if( in_array( $current_day_of_week, array( 6 ) ) ) {
		$delay_hours = ( 23 - $current_hour ) + 1 + $start_hour + 24;

	//Sunday
	} else if( in_array( $current_day_of_week, array( 7 ) ) ) {
		$delay_hours = ( 23 - $current_hour ) + 1 + $start_hour;

	//Edge case handling
	} else {
		$delay_hours = 0;
	}

	gravity_flow()->log_debug( __METHOD__ . '(): Delay Hours ' . $delay_hours );
	$schedule_timestamp = $current_timestamp + ( $delay_hours * 60 * 60 );

	gravity_flow()->log_debug( __METHOD__ . '(): Adjusted Scheduled: ' . date( 'Y-m-d H:i:s', $schedule_timestamp ) );

	return $schedule_timestamp;
}