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use crate::prelude::*;
use nu_engine::WholeStreamCommand;
use nu_errors::ShellError;
use nu_protocol::{ColumnPath, Primitive, Signature, SyntaxShape, UntaggedValue, Value};
use num_bigint::ToBigInt;
pub struct SubCommand;
impl WholeStreamCommand for SubCommand {
fn name(&self) -> &str {
"into int"
}
fn signature(&self) -> Signature {
Signature::build("into int").rest(
"rest",
SyntaxShape::ColumnPath,
"column paths to convert to int (for table input)",
)
}
fn usage(&self) -> &str {
"Convert value to integer"
}
fn run(&self, args: CommandArgs) -> Result<OutputStream, ShellError> {
into_int(args)
}
fn examples(&self) -> Vec<Example> {
vec![
Example {
description: "Convert string to integer in table",
example: "echo [[num]; ['-5'] [4] [1.5]] | into int num",
result: Some(vec![
UntaggedValue::row(indexmap! {
"num".to_string() => UntaggedValue::int(-5).into(),
})
.into(),
UntaggedValue::row(indexmap! {
"num".to_string() => UntaggedValue::int(4).into(),
})
.into(),
UntaggedValue::row(indexmap! {
"num".to_string() => UntaggedValue::int(1).into(),
})
.into(),
]),
},
Example {
description: "Convert string to integer",
example: "echo '2' | into int",
result: Some(vec![UntaggedValue::int(2).into()]),
},
Example {
description: "Convert decimal to integer",
example: "echo 5.9 | into int",
result: Some(vec![UntaggedValue::int(5).into()]),
},
Example {
description: "Convert decimal string to integer",
example: "echo '5.9' | into int",
result: Some(vec![UntaggedValue::int(5).into()]),
},
Example {
description: "Convert file size to integer",
example: "echo 4KB | into int",
result: Some(vec![UntaggedValue::int(4000).into()]),
},
Example {
description: "Convert bool to integer",
example: "echo $false $true | into int",
result: Some(vec![
UntaggedValue::int(0).into(),
UntaggedValue::int(1).into(),
]),
},
]
}
}
fn into_int(args: CommandArgs) -> Result<OutputStream, ShellError> {
let column_paths: Vec<ColumnPath> = args.rest(0)?;
Ok(args
.input
.map(move |v| {
if column_paths.is_empty() {
action(&v, v.tag())
} else {
let mut ret = v;
for path in &column_paths {
ret = ret.swap_data_by_column_path(
path,
Box::new(move |old| action(old, old.tag())),
)?;
}
Ok(ret)
}
})
.into_input_stream())
}
pub fn action(input: &Value, tag: impl Into<Tag>) -> Result<Value, ShellError> {
let tag = tag.into();
match &input.value {
UntaggedValue::Primitive(prim) => Ok(UntaggedValue::int(match prim {
Primitive::String(a_string) => match int_from_string(a_string, &tag) {
Ok(n) => n,
Err(e) => {
return Err(e);
}
},
Primitive::Decimal(dec) => match dec.to_bigint() {
Some(n) => match n.to_i64() {
Some(i) => i,
None => {
return Err(ShellError::unimplemented(
"failed to convert decimal to int",
));
}
},
None => {
return Err(ShellError::unimplemented(
"failed to convert decimal to int",
));
}
},
Primitive::Int(n_ref) => *n_ref,
Primitive::Boolean(a_bool) => match a_bool {
false => 0,
true => 1,
},
Primitive::Filesize(a_filesize) => match a_filesize.to_bigint() {
Some(n) => match n.to_i64() {
Some(i) => i,
None => {
return Err(ShellError::unimplemented(
"failed to convert filesize to bigint",
));
}
},
None => {
return Err(ShellError::unimplemented(
"failed to convert filesize to bigint",
));
}
},
_ => {
return Err(ShellError::unimplemented(
"'into int' for non-numeric primitives",
))
}
})
.into_value(&tag)),
UntaggedValue::Row(_) => Err(ShellError::labeled_error(
"specify column name to use, with 'into int COLUMN'",
"found table",
tag,
)),
_ => Err(ShellError::unimplemented("'into int' for unsupported type")),
}
}
fn int_from_string(a_string: &str, tag: &Tag) -> Result<i64, ShellError> {
match a_string.parse::<i64>() {
Ok(n) => Ok(n),
Err(_) => match a_string.parse::<f64>() {
Ok(f) => match f.to_i64() {
Some(i) => Ok(i),
None => Err(ShellError::labeled_error(
"Could not convert string value to int",
"original value",
tag.clone(),
)),
},
Err(_) => Err(ShellError::labeled_error(
"Could not convert string value to int",
"original value",
tag.clone(),
)),
},
}
}
#[cfg(test)]
mod tests {
use super::ShellError;
use super::SubCommand;
#[test]
fn examples_work_as_expected() -> Result<(), ShellError> {
use crate::examples::test as test_examples;
test_examples(SubCommand {})
}
}
