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use chrono::{Datelike, Duration, NaiveDateTime};
use polars::{
prelude::{Float64Chunked, Int64Chunked},
series::{IntoSeries, Series},
};
pub fn round(val: &Series) -> Series {
val.f64()
.unwrap()
.into_iter()
.map(|o: Option<f64>| o.map(|px: f64| px.round()))
.collect::<Float64Chunked>()
.into_series()
}
pub fn get_cw_from_ts(val: &Series) -> Series {
val.i64()
.unwrap()
.into_iter()
.map(|o: Option<i64>| {
o.map(|ts: i64| {
i64::try_from(
NaiveDateTime::from_timestamp_opt(ts / 1000, 0)
.unwrap()
.iso_week()
.week(),
)
.unwrap()
})
})
.collect::<Int64Chunked>()
.into_series()
}
pub fn get_weekday_from_ts(val: &Series) -> Series {
val.i64()
.unwrap()
.into_iter()
.map(|o: Option<i64>| {
o.map(|utc_ts_in_milliseconds: i64| {
let ts =
NaiveDateTime::from_timestamp_opt(utc_ts_in_milliseconds / 1000, 0).unwrap();
match ts.weekday() {
chrono::Weekday::Mon => {
i64::try_from(ts.weekday().number_from_monday()).unwrap()
}
chrono::Weekday::Tue => {
i64::try_from(ts.weekday().number_from_monday()).unwrap()
}
chrono::Weekday::Wed => {
i64::try_from(ts.weekday().number_from_monday()).unwrap()
}
chrono::Weekday::Thu => {
i64::try_from(ts.weekday().number_from_monday()).unwrap()
}
chrono::Weekday::Fri => {
i64::try_from(ts.weekday().number_from_monday()).unwrap()
}
chrono::Weekday::Sat => {
i64::try_from(ts.weekday().number_from_monday()).unwrap()
}
chrono::Weekday::Sun => {
i64::try_from(ts.weekday().number_from_monday()).unwrap()
}
}
})
})
.collect::<Int64Chunked>()
.into_series()
}
pub fn comma_separated_string_to_f64(val: Series) -> Series {
val.utf8()
.unwrap()
.into_iter()
.map(|o| o.map(|x| x.replace(",", ".").parse::<f64>().unwrap()))
.collect::<Float64Chunked>()
.into_series()
}
pub fn sub_time(val: Series, duration: Duration) -> Series {
val.utf8()
.unwrap()
.into_iter()
.map(|o| {
o.map(|ts| {
NaiveDateTime::parse_from_str(ts, "%d.%m.%Y %H:%M:%S")
.unwrap()
.checked_sub_signed(duration)
.unwrap()
.timestamp_millis()
})
})
.collect::<Int64Chunked>()
.into_series()
}
#[cfg(test)]
mod tests {
use super::*;
use polars::prelude::{df, DataFrame, NamedFrom};
/// This unit test checks for the DataFrame
///
/// ```
/// atid ,px , qx ,ftid ,ltid ,ts ,bm ,btpm ,cw
/// 0 ,10.00 ,1.00 ,0 ,0 ,1645300600000 ,false ,true ,1645300600000
/// 1 ,20.00 ,1.00 ,0 ,0 ,1645400600000 ,true ,true ,1645400600000
/// ```
///
/// If a call of `get_cw_from_ts` on the `cw` column yields the following DataFrame
///
/// ```
/// atid ,px , qx ,ftid ,ltid ,ts ,bm ,btpm ,cw
/// 0 ,10.00 ,1.00 ,0 ,0 ,1645300600000 ,false ,true ,7
/// 1 ,20.00 ,1.00 ,0 ,0 ,1645400600000 ,true ,true ,7
/// ```
#[tokio::test]
async fn test_get_cw_from_ts() {
let df: polars::prelude::PolarsResult<DataFrame> = df!(
"atid" => &[0, 1],
"px" => &[10.00, 20.00],
"qx" => &[1.00, 1.00],
"ftid" => &[0, 0],
"ltid" => &[0, 0],
"ts" => &[1645300600000_i64, 1645400600000],
"bm" => &[false, true],
"btpm" => &[true, true],
"cw" => &[1645300600000_i64, 1645400600000],
);
let target_df: polars::prelude::PolarsResult<DataFrame> = df!(
"atid" => &[0, 1],
"px" => &[10.00, 20.00],
"qx" => &[1.00, 1.00],
"ftid" => &[0, 0],
"ltid" => &[0, 0],
"ts" => &[1645300600000_i64, 1645400600000],
"bm" => &[false, true],
"btpm" => &[true, true],
"cw" => &[7_i64, 7],
);
assert_eq!(
df.unwrap()
.apply("cw", get_cw_from_ts)
.unwrap()
.frame_equal(&target_df.unwrap()),
true
);
}
/// This unit test checks for the DataFrame
///
/// ```
/// atid ,px , qx ,ftid ,ltid ,ts ,bm ,btpm ,weekday
/// 0 ,10.00 ,1.00 ,0 ,0 ,1645300600000 ,false ,true ,1645300600000
/// 1 ,20.00 ,1.00 ,0 ,0 ,1645400600000 ,true ,true ,1645400600000
/// ```
///
/// If a call of `test_get_weekday_from_ts` on the `weekday` column yields the following DataFrame
///
/// ```
/// atid ,px , qx ,ftid ,ltid ,ts ,bm ,btpm ,weekday
/// 0 ,10.00 ,1.00 ,0 ,0 ,1645300600000 ,false ,true ,6
/// 1 ,20.00 ,1.00 ,0 ,0 ,1645400600000 ,true ,true ,7
/// ```
#[tokio::test]
async fn test_get_weekday_from_ts() {
let df: polars::prelude::PolarsResult<DataFrame> = df!(
"atid" => &[0, 1],
"px" => &[10.00, 20.00],
"qx" => &[1.00, 1.00],
"ftid" => &[0, 0],
"ltid" => &[0, 0],
"ts" => &[1645300600000_i64, 1645400600000],
"bm" => &[false, true],
"btpm" => &[true, true],
"weekday" => &[1645300600000_i64, 1645400600000],
);
let target_df: polars::prelude::PolarsResult<DataFrame> = df!(
"atid" => &[0, 1],
"px" => &[10.00, 20.00],
"qx" => &[1.00, 1.00],
"ftid" => &[0, 0],
"ltid" => &[0, 0],
"ts" => &[1645300600000_i64, 1645400600000],
"bm" => &[false, true],
"btpm" => &[true, true],
"weekday" => &[6_i64, 7],
);
assert_eq!(
df.unwrap()
.apply("weekday", get_weekday_from_ts)
.unwrap()
.frame_equal(&target_df.unwrap()),
true
);
}
}