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use std::ops::Add; use chrono::{self, Duration, Local, TimeZone}; use chrono_tz::Tz; #[cfg(debug_assertions)] use lazy_static::lazy_static; use regex::Regex; use serde::Deserialize; use serde::de::{Deserializer, Error}; use crate::core::GenericResult; use crate::formatting; pub use crate::types::{Date, Time, DateTime}; #[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone, Copy)] pub struct DateOptTime { pub date: Date, pub time: Option<Time>, } impl DateOptTime { pub fn new_max_time(date: Date) -> DateOptTime { DateOptTime {date, time: Some(Time::from_hms_nano(23, 59, 59, 999_999_999))} } pub fn or_min_time(&self) -> DateTime { DateTime::new(self.date, match self.time { Some(time) => time, None => Time::from_hms(0, 0, 0), }) } } impl From<Date> for DateOptTime { fn from(date: Date) -> Self { DateOptTime {date, time: None} } } impl From<DateTime> for DateOptTime { fn from(time: DateTime) -> Self { DateOptTime { date: time.date(), time: Some(time.time()), } } } pub fn parse_period(start: Date, end: Date) -> GenericResult<(Date, Date)> { let period = (start, end.succ()); if period.0 >= period.1 { return Err!("Invalid period: {}", formatting::format_period(period)); } Ok(period) } pub fn parse_date(date: &str, format: &str) -> GenericResult<Date> { Ok(Date::parse_from_str(date, format).map_err(|_| format!( "Invalid date: {:?}", date))?) } pub fn deserialize_date<'de, D>(deserializer: D) -> Result<Date, D::Error> where D: Deserializer<'de> { let date: String = Deserialize::deserialize(deserializer)?; parse_date(&date, "%d.%m.%Y").map_err(D::Error::custom) } pub fn parse_time(time: &str, format: &str) -> GenericResult<Time> { Ok(Time::parse_from_str(time, format).map_err(|_| format!( "Invalid time: {:?}", time))?) } pub fn parse_date_time(date_time: &str, format: &str) -> GenericResult<DateTime> { Ok(DateTime::parse_from_str(date_time, format).map_err(|_| format!( "Invalid time: {:?}", date_time))?) } pub fn parse_tz_date_time<T: TimeZone>( string: &str, format: &str, tz: T, future_check: bool, ) -> GenericResult<chrono::DateTime<T>> { let date_time = tz.datetime_from_str(string, format).map_err(|_| format!( "Invalid time: {:?}", string))?; if future_check && (date_time.naive_utc() - utc_now()).num_hours() > 0 { return Err!("Invalid time: {:?}. It's from future", date_time); } Ok(date_time) } pub fn deserialize_date_opt_time<'de, D>(deserializer: D) -> Result<DateOptTime, D::Error> where D: Deserializer<'de> { let value: String = Deserialize::deserialize(deserializer)?; parse_date_time(&value, "%Y.%m.%d %H:%M:%S").map(Into::into) .or_else(|_| parse_date(&value, "%d.%m.%Y").map(Into::into)) .map_err(D::Error::custom) } pub fn parse_timezone(timezone: &str) -> GenericResult<Tz> { Ok(timezone.parse().map_err(|_| format!("Invalid time zone: {:?}", timezone))?) } pub fn parse_duration(string: &str) -> GenericResult<Duration> { let re = Regex::new(r"^(?P<number>[1-9]\d*)(?P<unit>[mhd])$").unwrap(); let seconds = re.captures(string).and_then(|captures| { let mut duration = match captures.name("number").unwrap().as_str().parse::<i64>().ok() { Some(duration) if duration > 0 => duration, _ => return None, }; duration *= match captures.name("unit").unwrap().as_str() { "m" => 60, "h" => 60 * 60, "d" => 60 * 60 * 24, _ => unreachable!(), }; Some(duration) }).ok_or_else(|| format!("Invalid duration: {}", string))?; Ok(Duration::seconds(seconds)) } pub fn today() -> Date { tz_now().date().naive_local() } pub fn today_trade_conclusion_time() -> DateOptTime { now().into() } pub fn today_trade_execution_date() -> Date { today().add(Duration::days(2)) } pub fn now() -> DateTime { tz_now().naive_local() } pub fn utc_now() -> DateTime { tz_now().naive_utc() } fn tz_now() -> chrono::DateTime<Local> { #[cfg(debug_assertions)] { use std::process; lazy_static! { static ref FAKE_NOW: Option<chrono::DateTime<Local>> = parse_fake_now().unwrap_or_else(|e| { eprintln!("{}.", e); process::exit(1); }); } if let Some(&now) = FAKE_NOW.as_ref() { return now; } } chrono::Local::now() } #[cfg(debug_assertions)] fn parse_fake_now() -> GenericResult<Option<chrono::DateTime<Local>>> { use std::env::{self, VarError}; let name = "INVESTMENTS_NOW"; match env::var(name) { Ok(value) => { let timezone = chrono::Local::now().timezone(); if let Ok(now) = timezone.datetime_from_str(&value, "%Y.%m.%d %H:%M:%S") { return Ok(Some(now)); } }, Err(e) => match e { VarError::NotPresent => return Ok(None), VarError::NotUnicode(_) => {}, }, }; Err!("Invalid {} environment variable value", name) }