* Class for time interval and numeric range handling for reports.
namespace Automattic\WooCommerce\Admin\API\Reports;
defined( 'ABSPATH' ) || exit;
* Date & time interval and numeric range handling class for Reporting API.
* Format string for ISO DateTime formatter.
public static $iso_datetime_format = 'Y-m-d\TH:i:s';
* Format string for use in SQL queries.
public static $sql_datetime_format = 'Y-m-d H:i:s';
* Converts local datetime to GMT/UTC time.
* @param string $datetime_string String representation of local datetime.
public static function convert_local_datetime_to_gmt( $datetime_string ) {
$datetime = new \DateTime( $datetime_string, new \DateTimeZone( wc_timezone_string() ) );
$datetime->setTimezone( new \DateTimeZone( 'GMT' ) );
* Returns default 'before' parameter for the reports.
public static function default_before() {
$datetime = new \WC_DateTime();
// Set local timezone or offset.
if ( get_option( 'timezone_string' ) ) {
$datetime->setTimezone( new \DateTimeZone( wc_timezone_string() ) );
$datetime->set_utc_offset( wc_timezone_offset() );
* Returns default 'after' parameter for the reports.
public static function default_after() {
$week_back = $now - WEEK_IN_SECONDS;
$datetime = new \WC_DateTime();
$datetime->setTimestamp( $week_back );
// Set local timezone or offset.
if ( get_option( 'timezone_string' ) ) {
$datetime->setTimezone( new \DateTimeZone( wc_timezone_string() ) );
$datetime->set_utc_offset( wc_timezone_offset() );
* Returns date format to be used as grouping clause in SQL.
* @param string $time_interval Time interval.
* @param string $table_name Name of the db table relevant for the date constraint.
* @param string $date_column_name Name of the date table column.
public static function db_datetime_format( $time_interval, $table_name, $date_column_name = 'date_created' ) {
$first_day_of_week = absint( get_option( 'start_of_week' ) );
if ( 1 === $first_day_of_week ) {
// Week begins on Monday, ISO 8601.
$week_format = "DATE_FORMAT({$table_name}.`{$date_column_name}`, '%x-%v')";
// Week begins on day other than specified by ISO 8601, needs to be in sync with function simple_week_number.
$week_format = "CONCAT(YEAR({$table_name}.`{$date_column_name}`), '-', LPAD( FLOOR( ( DAYOFYEAR({$table_name}.`{$date_column_name}`) + ( ( DATE_FORMAT(MAKEDATE(YEAR({$table_name}.`{$date_column_name}`),1), '%w') - $first_day_of_week + 7 ) % 7 ) - 1 ) / 7 ) + 1 , 2, '0'))";
// Whenever this is changed, double check method time_interval_id to make sure they are in sync.
$mysql_date_format_mapping = array(
'hour' => "DATE_FORMAT({$table_name}.`{$date_column_name}`, '%Y-%m-%d %H')",
'day' => "DATE_FORMAT({$table_name}.`{$date_column_name}`, '%Y-%m-%d')",
'month' => "DATE_FORMAT({$table_name}.`{$date_column_name}`, '%Y-%m')",
'quarter' => "CONCAT(YEAR({$table_name}.`{$date_column_name}`), '-', QUARTER({$table_name}.`{$date_column_name}`))",
'year' => "YEAR({$table_name}.`{$date_column_name}`)",
return $mysql_date_format_mapping[ $time_interval ];
* Returns quarter for the DateTime.
* @param DateTime $datetime Local date & time.
public static function quarter( $datetime ) {
switch ( (int) $datetime->format( 'm' ) ) {
* Returns simple week number for the DateTime, for week starting on $first_day_of_week.
* The first week of the year is considered to be the week containing January 1.
* The second week starts on the next $first_day_of_week.
* @param DateTime $datetime Local date for which the week number is to be calculated.
* @param int $first_day_of_week 0 for Sunday to 6 for Saturday.
public static function simple_week_number( $datetime, $first_day_of_week ) {
$beg_of_year_day = new \DateTime( "{$datetime->format('Y')}-01-01" );
$adj_day_beg_of_year = ( (int) $beg_of_year_day->format( 'w' ) - $first_day_of_week + 7 ) % 7;
$days_since_start_of_year = (int) $datetime->format( 'z' ) + 1;
return (int) floor( ( ( $days_since_start_of_year + $adj_day_beg_of_year - 1 ) / 7 ) ) + 1;
* Returns ISO 8601 week number for the DateTime, if week starts on Monday,
* otherwise returns simple week number.
* @see TimeInterval::simple_week_number()
* @param DateTime $datetime Local date for which the week number is to be calculated.
* @param int $first_day_of_week 0 for Sunday to 6 for Saturday.
public static function week_number( $datetime, $first_day_of_week ) {
if ( 1 === $first_day_of_week ) {
$week_number = (int) $datetime->format( 'W' );
$week_number = self::simple_week_number( $datetime, $first_day_of_week );
* Returns time interval id for the DateTime.
* @param string $time_interval Time interval type (week, day, etc).
* @param DateTime $datetime Date & time.
public static function time_interval_id( $time_interval, $datetime ) {
// Whenever this is changed, double check method db_datetime_format to make sure they are in sync.
$php_time_format_for = array(
'quarter' => 'Y-' . self::quarter( $datetime ),
// If the week does not begin on Monday.
$first_day_of_week = absint( get_option( 'start_of_week' ) );
if ( 'week' === $time_interval && 1 !== $first_day_of_week ) {
$week_no = self::simple_week_number( $datetime, $first_day_of_week );
$week_no = str_pad( $week_no, 2, '0', STR_PAD_LEFT );
$year_no = $datetime->format( 'Y' );
return "$year_no-$week_no";
return $datetime->format( $php_time_format_for[ $time_interval ] );
* Calculates number of time intervals between two dates, closed interval on both sides.
* @param DateTime $start_datetime Start date & time.
* @param DateTime $end_datetime End date & time.
* @param string $interval Time interval increment, e.g. hour, day, week.
public static function intervals_between( $start_datetime, $end_datetime, $interval ) {
$end_timestamp = (int) $end_datetime->format( 'U' );
$start_timestamp = (int) $start_datetime->format( 'U' );
// modulo HOUR_IN_SECONDS would normally work, but there are non-full hour timezones, e.g. Nepal.
$start_min_sec = (int) $start_datetime->format( 'i' ) * MINUTE_IN_SECONDS + (int) $start_datetime->format( 's' );
$end_min_sec = (int) $end_datetime->format( 'i' ) * MINUTE_IN_SECONDS + (int) $end_datetime->format( 's' );
if ( $end_min_sec < $start_min_sec ) {
$diff_timestamp = $end_timestamp - $start_timestamp;
return (int) floor( ( (int) $diff_timestamp ) / HOUR_IN_SECONDS ) + 1 + $addendum;
$days = $start_datetime->diff( $end_datetime )->format( '%r%a' );
$end_hour_min_sec = (int) $end_datetime->format( 'H' ) * HOUR_IN_SECONDS + (int) $end_datetime->format( 'i' ) * MINUTE_IN_SECONDS + (int) $end_datetime->format( 's' );
$start_hour_min_sec = (int) $start_datetime->format( 'H' ) * HOUR_IN_SECONDS + (int) $start_datetime->format( 'i' ) * MINUTE_IN_SECONDS + (int) $start_datetime->format( 's' );
if ( $end_hour_min_sec < $start_hour_min_sec ) {
// @todo Optimize? approximately day count / 7, but year end is tricky, a week can have fewer days.
$start_datetime = self::next_week_start( $start_datetime );
} while ( $start_datetime <= $end_datetime );
// Year diff in months: (end_year - start_year - 1) * 12.
$year_diff_in_months = ( (int) $end_datetime->format( 'Y' ) - (int) $start_datetime->format( 'Y' ) - 1 ) * 12;
// All the months in end_date year plus months from X to 12 in the start_date year.
$month_diff = (int) $end_datetime->format( 'n' ) + ( 12 - (int) $start_datetime->format( 'n' ) );
// Add months for number of years between end_date and start_date.
$month_diff += $year_diff_in_months + 1;
// Year diff in quarters: (end_year - start_year - 1) * 4.
$year_diff_in_quarters = ( (int) $end_datetime->format( 'Y' ) - (int) $start_datetime->format( 'Y' ) - 1 ) * 4;
// All the quarters in end_date year plus quarters from X to 4 in the start_date year.
$quarter_diff = self::quarter( $end_datetime ) + ( 4 - self::quarter( $start_datetime ) );
// Add quarters for number of years between end_date and start_date.
$quarter_diff += $year_diff_in_quarters + 1;
$year_diff = (int) $end_datetime->format( 'Y' ) - (int) $start_datetime->format( 'Y' );
* Returns a new DateTime object representing the next hour start/previous hour end if reversed.
* @param DateTime $datetime Date and time.
* @param bool $reversed Going backwards in time instead of forward.
public static function next_hour_start( $datetime, $reversed = false ) {
$hour_increment = $reversed ? 0 : 1;
$timestamp = (int) $datetime->format( 'U' );
$seconds_into_hour = (int) $datetime->format( 'i' ) * MINUTE_IN_SECONDS + (int) $datetime->format( 's' );
$hours_offset_timestamp = $timestamp + ( $hour_increment * HOUR_IN_SECONDS - $seconds_into_hour );
$hours_offset_timestamp --;
$hours_offset_time = new \DateTime();
$hours_offset_time->setTimestamp( $hours_offset_timestamp );
$hours_offset_time->setTimezone( new \DateTimeZone( wc_timezone_string() ) );
return $hours_offset_time;
* Returns a new DateTime object representing the next day start, or previous day end if reversed.
* @param DateTime $datetime Date and time.
* @param bool $reversed Going backwards in time instead of forward.
public static function next_day_start( $datetime, $reversed = false ) {
$oneday = new \DateInterval( 'P1D' );
$new_datetime = clone $datetime;
$new_datetime->sub( $oneday );
$new_datetime->setTime( 23, 59, 59 );
$new_datetime->add( $oneday );
$new_datetime->setTime( 0, 0, 0 );
* Returns DateTime object representing the next week start, or previous week end if reversed.
* The next week start is the first day of the next week at 00:00:00.
* The previous week end is the last day of the previous week at 23:59:59.
* The start day is determined by the "start_of_week" wp_option.
* @param DateTime $datetime Date and time.
* @param bool $reversed Going backwards in time instead of forward.
public static function next_week_start( $datetime, $reversed = false ) {
$seven_days = new \DateInterval( 'P7D' );
// Default timezone set in wp-settings.php.
$default_timezone = date_default_timezone_get();
// Timezone that the WP site uses in Settings > General.
$original_timezone = $datetime->getTimezone();
// @codingStandardsIgnoreStart
date_default_timezone_set( 'UTC' );
$start_end_timestamp = get_weekstartend( $datetime->format( 'Y-m-d' ) );
date_default_timezone_set( $default_timezone );
// @codingStandardsIgnoreEnd
$result = \DateTime::createFromFormat( 'U', $start_end_timestamp['end'] )->sub( $seven_days );
$result = \DateTime::createFromFormat( 'U', $start_end_timestamp['start'] )->add( $seven_days );
return \DateTime::createFromFormat( 'Y-m-d H:i:s', $result->format( 'Y-m-d H:i:s' ), $original_timezone );
* Returns a new DateTime object representing the next month start, or previous month end if reversed.
* @param DateTime $datetime Date and time.
* @param bool $reversed Going backwards in time instead of forward.
public static function next_month_start( $datetime, $reversed = false ) {
$year = $datetime->format( 'Y' );
$month = (int) $datetime->format( 'm' );
$beg_of_month_datetime = new \DateTime( "$year-$month-01 00:00:00", new \DateTimeZone( wc_timezone_string() ) );
$timestamp = (int) $beg_of_month_datetime->format( 'U' );
$end_of_prev_month_timestamp = $timestamp - 1;
$datetime->setTimestamp( $end_of_prev_month_timestamp );
$month += $month_increment;
$datetime = new \DateTime( "$year-$month-$day 00:00:00", new \DateTimeZone( wc_timezone_string() ) );
* Returns a new DateTime object representing the next quarter start, or previous quarter end if reversed.
* @param DateTime $datetime Date and time.
* @param bool $reversed Going backwards in time instead of forward.
public static function next_quarter_start( $datetime, $reversed = false ) {
$year = $datetime->format( 'Y' );
$month = (int) $datetime->format( 'n' );
$datetime = new \DateTime( "$year-$month-01 00:00:00", new \DateTimeZone( wc_timezone_string() ) );
$timestamp = (int) $datetime->format( 'U' );
$end_of_prev_month_timestamp = $timestamp - 1;
$datetime->setTimestamp( $end_of_prev_month_timestamp );
* Return a new DateTime object representing the next year start, or previous year end if reversed.
* @param DateTime $datetime Date and time.
* @param bool $reversed Going backwards in time instead of forward.
public static function next_year_start( $datetime, $reversed = false ) {
$year = (int) $datetime->format( 'Y' );
$datetime = new \DateTime( "$year-$month-$day 00:00:00", new \DateTimeZone( wc_timezone_string() ) );
$timestamp = (int) $datetime->format( 'U' );
$end_of_prev_year_timestamp = $timestamp - 1;
$datetime->setTimestamp( $end_of_prev_year_timestamp );
$year += $year_increment;
$datetime = new \DateTime( "$year-$month-$day 00:00:00", new \DateTimeZone( wc_timezone_string() ) );
* Returns beginning of next time interval for provided DateTime.
* E.g. for current DateTime, beginning of next day, week, quarter, etc.
* @param DateTime $datetime Date and time.
* @param string $time_interval Time interval, e.g. week, day, hour.
* @param bool $reversed Going backwards in time instead of forward.
public static function iterate( $datetime, $time_interval, $reversed = false ) {
return call_user_func( array( __CLASS__, "next_{$time_interval}_start" ), $datetime, $reversed );
* Returns expected number of items on the page in case of date ordering.
* @param int $expected_interval_count Expected number of intervals in total.
* @param int $items_per_page Number of items per page.
* @param int $page_no Page number.
public static function expected_intervals_on_page( $expected_interval_count, $items_per_page, $page_no ) {
$total_pages = (int) ceil( $expected_interval_count / $items_per_page );
if ( $page_no < $total_pages ) {
} elseif ( $page_no === $total_pages ) {
return $expected_interval_count - ( $page_no - 1 ) * $items_per_page;
* Returns true if there are any intervals that need to be filled in the response.
It is recommended that you Edit text format, this type of Fix handles quite a lot in one request
