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feat: converstion method implementations
* to_datetime_constructor (internal): converts DateTime to DateTimeConstructor * to_local_time: converts DateTime to DateTimeConstructor with local timezone * to_universal_time: converts DateTime to DateTimeConstructor with UTC timezone * to_iso_date: converts DateTime to UTC ISO 8601 string
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1 changed files with 139 additions and 25 deletions
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@ -43,6 +43,34 @@ impl DateTime {
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}
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}
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pub fn from_universal_time(date_time: Option<DateTimeConstructor>) -> Self {
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if let Some(date_time) = date_time {
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let utc_time: ChronoDateTime<Utc> = Utc.from_utc_datetime(&NaiveDateTime::new(
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NaiveDate::from_ymd_opt(date_time.year, date_time.month, date_time.day)
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.expect("invalid date"),
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NaiveTime::from_hms_milli_opt(
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date_time.hour,
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date_time.minute,
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date_time.second,
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date_time.millisecond,
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)
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.expect("invalid time"),
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));
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Self {
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unix_timestamp: utc_time.timestamp(),
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unix_timestamp_millis: utc_time.timestamp_millis(),
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}
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} else {
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let utc_time = Utc::now();
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Self {
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unix_timestamp: utc_time.timestamp(),
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unix_timestamp_millis: utc_time.timestamp_millis(),
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}
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}
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}
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pub fn from_local_time(date_time: Option<DateTimeConstructor>) -> Self {
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if let Some(date_time) = date_time {
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let local_time: ChronoDateTime<Local> = Local
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@ -77,7 +105,8 @@ impl DateTime {
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where
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T: ToString,
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{
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let time = ChronoDateTime::parse_from_str(iso_date.to_string().as_str(), "%Y-%m-%dT%H:%M:%SZ")
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let time =
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ChronoDateTime::parse_from_str(iso_date.to_string().as_str(), "%Y-%m-%dT%H:%M:%SZ")
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.expect("invalid ISO 8601 string");
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Self {
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@ -85,6 +114,52 @@ impl DateTime {
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unix_timestamp_millis: time.timestamp_millis(),
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}
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}
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fn to_datetime_constructor<T>(date_time: ChronoDateTime<T>) -> DateTimeConstructor
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where
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T: TimeZone,
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{
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let mut date_time_constructor = DateTimeConstructor::default();
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// Any less tedious way to get Enum member based on index?
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// I know there's some crates available with derive macros for this,
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// would it be okay if used some of them?
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date_time_constructor
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.with_year(date_time.year())
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.with_month(match date_time.month() {
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1 => Month::January,
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2 => Month::February,
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3 => Month::March,
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4 => Month::April,
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5 => Month::May,
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6 => Month::June,
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7 => Month::July,
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8 => Month::August,
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9 => Month::September,
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10 => Month::October,
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11 => Month::November,
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12 => Month::December,
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_ => panic!("invalid month ordinal"),
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})
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.with_day(date_time.day())
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.with_hour(date_time.hour())
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.with_minute(date_time.minute())
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.with_second(date_time.second());
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date_time_constructor
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}
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pub fn to_local_time(&self) -> DateTimeConstructor {
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Self::to_datetime_constructor(Local.timestamp_opt(self.unix_timestamp, 0).unwrap())
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}
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pub fn to_universal_time(&self) -> DateTimeConstructor {
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Self::to_datetime_constructor(Utc.timestamp_opt(self.unix_timestamp, 0).unwrap())
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}
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pub fn to_iso_date(&self) -> String {
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self.to_universal_time().to_iso_string(Timezone::UTC)
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}
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}
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pub struct DateTimeConstructor {
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@ -112,6 +187,7 @@ impl Default for DateTimeConstructor {
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}
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}
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#[derive(PartialEq, Eq, PartialOrd, Ord)]
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pub enum Month {
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January,
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February,
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@ -127,61 +203,99 @@ pub enum Month {
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December,
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}
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// fn match_month_to_num(month: Month) {
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// match month {
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// Month::January => 1,
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// Month::February => 2,
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// Month::March => 3,
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// Month::April => 4,
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// Month::May => 5,
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// Month::June => 6,
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// Month::July => 7,
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// Month::August => 8,
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// Month::September => 9,
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// Month::October => 10,
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// Month::November => 11,
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// Month::December => 12,
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// };
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// }
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enum Timezone {
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UTC,
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Local,
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}
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impl DateTimeConstructor {
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pub fn with_year(&mut self, year: i32) -> &Self {
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pub fn with_year(&mut self, year: i32) -> &mut Self {
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self.year = year;
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self
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}
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pub fn with_month(&mut self, month: Month) -> &Self {
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let month = match month {
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Month::January => 1,
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Month::February => 2,
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Month::March => 3,
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Month::April => 4,
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Month::May => 5,
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Month::June => 6,
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Month::July => 7,
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Month::August => 8,
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Month::September => 9,
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Month::October => 10,
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Month::November => 11,
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Month::December => 12,
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};
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self.month = month;
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pub fn with_month(&mut self, month: Month) -> &mut Self {
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self.month = month as u32;
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self
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}
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pub fn with_day(&mut self, day: u32) -> &Self {
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pub fn with_day(&mut self, day: u32) -> &mut Self {
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self.day = day;
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self
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}
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pub fn with_hour(&mut self, hour: u32) -> &Self {
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pub fn with_hour(&mut self, hour: u32) -> &mut Self {
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self.hour = hour;
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self
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}
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pub fn with_minute(&mut self, minute: u32) -> &Self {
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pub fn with_minute(&mut self, minute: u32) -> &mut Self {
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self.minute = minute;
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self
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}
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pub fn with_second(&mut self, second: u32) -> &Self {
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pub fn with_second(&mut self, second: u32) -> &mut Self {
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self.second = second;
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self
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}
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pub fn with_millisecond(&mut self, millisecond: u32) -> &Self {
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pub fn with_millisecond(&mut self, millisecond: u32) -> &mut Self {
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self.millisecond = millisecond;
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self
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}
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fn to_iso_string(&self, timezone: Timezone) -> String {
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let iso_format = "%Y-%m-%dT%H:%M:%SZ";
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match timezone {
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Timezone::UTC => Utc
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.with_ymd_and_hms(
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self.year,
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self.month,
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self.day,
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self.hour,
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self.minute,
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self.second,
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)
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.unwrap()
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.format(iso_format)
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.to_string(),
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Timezone::Local => Local
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.with_ymd_and_hms(
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self.year,
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self.month,
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self.day,
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self.hour,
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self.minute,
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self.second,
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)
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.unwrap()
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.format(iso_format)
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.to_string(),
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}
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}
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}
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