use chrono::{DateTime, Datelike, FixedOffset, Timelike};
use nu_engine::command_prelude::*;
use nu_protocol::format_duration_as_timeperiod;
#[derive(Clone)]
pub struct IntoRecord;
impl Command for IntoRecord {
fn name(&self) -> &str {
"into record"
}
fn signature(&self) -> Signature {
Signature::build("into record")
.input_output_types(vec![
(Type::Date, Type::record()),
(Type::Duration, Type::record()),
(Type::List(Box::new(Type::Any)), Type::record()),
(Type::record(), Type::record()),
])
.category(Category::Conversions)
}
fn description(&self) -> &str {
"Convert value to record."
}
fn search_terms(&self) -> Vec<&str> {
vec!["convert"]
}
fn run(
&self,
_engine_state: &EngineState,
_stack: &mut Stack,
call: &Call,
input: PipelineData,
) -> Result<PipelineData, ShellError> {
into_record(call, input)
}
fn examples(&self) -> Vec<Example> {
vec![
Example {
description: "Convert from one row table to record",
example: "[[value]; [false]] | into record",
result: Some(Value::test_record(record! {
"value" => Value::test_bool(false),
})),
},
Example {
description: "Convert from list of records to record",
example: "[{foo: bar} {baz: quux}] | into record",
result: Some(Value::test_record(record! {
"foo" => Value::test_string("bar"),
"baz" => Value::test_string("quux"),
})),
},
Example {
description: "Convert from list of pairs into record",
example: "[[foo bar] [baz quux]] | into record",
result: Some(Value::test_record(record! {
"foo" => Value::test_string("bar"),
"baz" => Value::test_string("quux"),
})),
},
Example {
description: "convert duration to record (weeks max)",
example: "(-500day - 4hr - 5sec) | into record",
result: Some(Value::test_record(record! {
"week" => Value::test_int(71),
"day" => Value::test_int(3),
"hour" => Value::test_int(4),
"second" => Value::test_int(5),
"sign" => Value::test_string("-"),
})),
},
Example {
description: "convert record to record",
example: "{a: 1, b: 2} | into record",
result: Some(Value::test_record(record! {
"a" => Value::test_int(1),
"b" => Value::test_int(2),
})),
},
Example {
description: "convert date to record",
example: "2020-04-12T22:10:57+02:00 | into record",
result: Some(Value::test_record(record! {
"year" => Value::test_int(2020),
"month" => Value::test_int(4),
"day" => Value::test_int(12),
"hour" => Value::test_int(22),
"minute" => Value::test_int(10),
"second" => Value::test_int(57),
"millisecond" => Value::test_int(0),
"microsecond" => Value::test_int(0),
"nanosecond" => Value::test_int(0),
"timezone" => Value::test_string("+02:00"),
})),
},
Example {
description: "convert date components to table columns",
example: "2020-04-12T22:10:57+02:00 | into record | transpose | transpose -r",
result: None,
},
]
}
}
fn into_record(call: &Call, input: PipelineData) -> Result<PipelineData, ShellError> {
let span = input.span().unwrap_or(call.head);
match input {
PipelineData::Value(Value::Date { val, .. }, _) => {
Ok(parse_date_into_record(val, span).into_pipeline_data())
}
PipelineData::Value(Value::Duration { val, .. }, _) => {
Ok(parse_duration_into_record(val, span).into_pipeline_data())
}
PipelineData::Value(Value::List { .. }, _) | PipelineData::ListStream(..) => {
let mut record = Record::new();
let metadata = input.metadata();
enum ExpectedType {
Record,
Pair,
}
let mut expected_type = None;
for item in input.into_iter() {
let span = item.span();
match item {
Value::Record { val, .. }
if matches!(expected_type, None | Some(ExpectedType::Record)) =>
{
for (key, val) in val.into_owned() {
record.insert(key, val);
}
expected_type = Some(ExpectedType::Record);
}
Value::List { mut vals, .. }
if matches!(expected_type, None | Some(ExpectedType::Pair)) =>
{
if vals.len() == 2 {
let (val, key) = vals.pop().zip(vals.pop()).expect("length is < 2");
record.insert(key.coerce_into_string()?, val);
} else {
return Err(ShellError::IncorrectValue {
msg: format!(
"expected inner list with two elements, but found {} element(s)",
vals.len()
),
val_span: span,
call_span: call.head,
});
}
expected_type = Some(ExpectedType::Pair);
}
Value::Nothing { .. } => {}
Value::Error { error, .. } => return Err(*error),
_ => {
return Err(ShellError::TypeMismatch {
err_message: format!(
"expected {}, found {} (while building record from list)",
match expected_type {
Some(ExpectedType::Record) => "record",
Some(ExpectedType::Pair) => "list with two elements",
None => "record or list with two elements",
},
item.get_type(),
),
span,
});
}
}
}
Ok(Value::record(record, span).into_pipeline_data_with_metadata(metadata))
}
PipelineData::Value(Value::Record { .. }, _) => Ok(input),
PipelineData::Value(Value::Error { error, .. }, _) => Err(*error),
other => Err(ShellError::TypeMismatch {
err_message: format!("Can't convert {} to record", other.get_type()),
span,
}),
}
}
fn parse_date_into_record(date: DateTime<FixedOffset>, span: Span) -> Value {
Value::record(
record! {
"year" => Value::int(date.year() as i64, span),
"month" => Value::int(date.month() as i64, span),
"day" => Value::int(date.day() as i64, span),
"hour" => Value::int(date.hour() as i64, span),
"minute" => Value::int(date.minute() as i64, span),
"second" => Value::int(date.second() as i64, span),
"millisecond" => Value::int(date.timestamp_subsec_millis() as i64, span),
"microsecond" => Value::int((date.nanosecond() / 1_000 % 1_000) as i64, span),
"nanosecond" => Value::int((date.nanosecond() % 1_000) as i64, span),
"timezone" => Value::string(date.offset().to_string(), span),
},
span,
)
}
fn parse_duration_into_record(duration: i64, span: Span) -> Value {
let (sign, periods) = format_duration_as_timeperiod(duration);
let mut record = Record::new();
for p in periods {
let num_with_unit = p.to_text().to_string();
let split = num_with_unit.split(' ').collect::<Vec<&str>>();
record.push(
match split[1] {
"ns" => "nanosecond",
"µs" => "microsecond",
"ms" => "millisecond",
"sec" => "second",
"min" => "minute",
"hr" => "hour",
"day" => "day",
"wk" => "week",
_ => "unknown",
},
Value::int(split[0].parse().unwrap_or(0), span),
);
}
record.push(
"sign",
Value::string(if sign == -1 { "-" } else { "+" }, span),
);
Value::record(record, span)
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn test_examples() {
use crate::test_examples;
test_examples(IntoRecord {})
}
}