forked from extern/nushell
125 lines
3.0 KiB
Rust
125 lines
3.0 KiB
Rust
use crate::prelude::*;
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use chrono::{DateTime, Local, Utc};
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use nu_errors::ShellError;
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use nu_protocol::{Dictionary, Value};
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use crate::commands::WholeStreamCommand;
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use chrono::{Datelike, TimeZone, Timelike};
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use core::fmt::Display;
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use indexmap::IndexMap;
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use nu_protocol::{Signature, UntaggedValue};
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pub struct Date;
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#[async_trait]
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impl WholeStreamCommand for Date {
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fn name(&self) -> &str {
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"date"
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}
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fn signature(&self) -> Signature {
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Signature::build("date")
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.switch("utc", "use universal time (UTC)", Some('u'))
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.switch("local", "use the local time", Some('l'))
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}
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fn usage(&self) -> &str {
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"Get the current datetime."
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}
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async fn run(
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&self,
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args: CommandArgs,
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registry: &CommandRegistry,
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) -> Result<OutputStream, ShellError> {
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date(args, registry).await
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}
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fn examples(&self) -> Vec<Example> {
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vec![
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Example {
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description: "Get the current local time and date",
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example: "date",
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result: None,
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},
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Example {
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description: "Get the current UTC time and date",
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example: "date --utc",
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result: None,
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},
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]
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}
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}
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pub fn date_to_value<T: TimeZone>(dt: DateTime<T>, tag: Tag) -> Value
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where
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T::Offset: Display,
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{
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let mut indexmap = IndexMap::new();
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indexmap.insert(
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"year".to_string(),
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UntaggedValue::int(dt.year()).into_value(&tag),
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);
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indexmap.insert(
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"month".to_string(),
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UntaggedValue::int(dt.month()).into_value(&tag),
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);
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indexmap.insert(
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"day".to_string(),
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UntaggedValue::int(dt.day()).into_value(&tag),
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);
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indexmap.insert(
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"hour".to_string(),
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UntaggedValue::int(dt.hour()).into_value(&tag),
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);
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indexmap.insert(
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"minute".to_string(),
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UntaggedValue::int(dt.minute()).into_value(&tag),
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);
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indexmap.insert(
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"second".to_string(),
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UntaggedValue::int(dt.second()).into_value(&tag),
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);
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let tz = dt.offset();
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indexmap.insert(
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"timezone".to_string(),
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UntaggedValue::string(format!("{}", tz)).into_value(&tag),
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);
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UntaggedValue::Row(Dictionary::from(indexmap)).into_value(&tag)
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}
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pub async fn date(
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args: CommandArgs,
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registry: &CommandRegistry,
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) -> Result<OutputStream, ShellError> {
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let registry = registry.clone();
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let args = args.evaluate_once(®istry).await?;
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let tag = args.call_info.name_tag.clone();
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let value = if args.has("utc") {
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let utc: DateTime<Utc> = Utc::now();
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date_to_value(utc, tag)
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} else {
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let local: DateTime<Local> = Local::now();
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date_to_value(local, tag)
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};
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Ok(OutputStream::one(value))
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}
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#[cfg(test)]
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mod tests {
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use super::Date;
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#[test]
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fn examples_work_as_expected() {
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use crate::examples::test as test_examples;
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test_examples(Date {})
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}
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}
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