<?php
if (!defined('ABSPATH')) exit;
abstract class ActionScheduler_TimezoneHelper {
 private static $local_timezone = NULL;
 public static function set_local_timezone( DateTime $date ) {
 // Accept a DateTime for easier backward compatibility, even though we require methods on ActionScheduler_DateTime
 if ( ! is_a( $date, 'ActionScheduler_DateTime' ) ) {
 $date = as_get_datetime_object( $date->format( 'U' ) );
 }
 if ( get_option( 'timezone_string' ) ) {
 $date->setTimezone( new DateTimeZone( self::get_local_timezone_string() ) );
 } else {
 $date->setUtcOffset( self::get_local_timezone_offset() );
 }
 return $date;
 }
 protected static function get_local_timezone_string( $reset = false ) {
 // If site timezone string exists, return it.
 $timezone = get_option( 'timezone_string' );
 if ( $timezone ) {
 return $timezone;
 }
 // Get UTC offset, if it isn't set then return UTC.
 $utc_offset = intval( get_option( 'gmt_offset', 0 ) );
 if ( 0 === $utc_offset ) {
 return 'UTC';
 }
 // Adjust UTC offset from hours to seconds.
 $utc_offset *= 3600;
 // Attempt to guess the timezone string from the UTC offset.
 $timezone = timezone_name_from_abbr( '', $utc_offset );
 if ( $timezone ) {
 return $timezone;
 }
 // Last try, guess timezone string manually.
 foreach ( timezone_abbreviations_list() as $abbr ) {
 foreach ( $abbr as $city ) {
 if ( (bool) date( 'I' ) === (bool) $city['dst'] && $city['timezone_id'] && intval( $city['offset'] ) === $utc_offset ) {
 return $city['timezone_id'];
 }
 }
 }
 // No timezone string
 return '';
 }
 protected static function get_local_timezone_offset() {
 $timezone = get_option( 'timezone_string' );
 if ( $timezone ) {
 $timezone_object = new DateTimeZone( $timezone );
 return $timezone_object->getOffset( new DateTime( 'now' ) );
 } else {
 return floatval( get_option( 'gmt_offset', 0 ) ) * HOUR_IN_SECONDS;
 }
 }
 public static function get_local_timezone( $reset = FALSE ) {
 _deprecated_function( __FUNCTION__, '2.1.0', 'ActionScheduler_TimezoneHelper::set_local_timezone()' );
 if ( $reset ) {
 self::$local_timezone = NULL;
 }
 if ( !isset(self::$local_timezone) ) {
 $tzstring = get_option('timezone_string');
 if ( empty($tzstring) ) {
 $gmt_offset = get_option('gmt_offset');
 if ( $gmt_offset == 0 ) {
 $tzstring = 'UTC';
 } else {
 $gmt_offset *= HOUR_IN_SECONDS;
 $tzstring = timezone_name_from_abbr( '', $gmt_offset, 1 );
 // If there's no timezone string, try again with no DST.
 if ( false === $tzstring ) {
 $tzstring = timezone_name_from_abbr( '', $gmt_offset, 0 );
 }
 // Try mapping to the first abbreviation we can find.
 if ( false === $tzstring ) {
 $is_dst = date( 'I' );
 foreach ( timezone_abbreviations_list() as $abbr ) {
 foreach ( $abbr as $city ) {
 if ( $city['dst'] == $is_dst && $city['offset'] == $gmt_offset ) {
 // If there's no valid timezone ID, keep looking.
 if ( null === $city['timezone_id'] ) {
 continue;
 }
 $tzstring = $city['timezone_id'];
 break 2;
 }
 }
 }
 }
 // If we still have no valid string, then fall back to UTC.
 if ( false === $tzstring ) {
 $tzstring = 'UTC';
 }
 }
 }
 self::$local_timezone = new DateTimeZone($tzstring);
 }
 return self::$local_timezone;
 }
}
