2021-11-05 04:59:12 +01:00
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use nu_engine::CallExt;
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2021-10-11 03:56:19 +02:00
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use nu_protocol::{
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2021-11-05 04:59:12 +01:00
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ast::{Call, CellPath},
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engine::{Command, EngineState, Stack},
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2021-10-25 23:14:21 +02:00
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Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Value,
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};
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2021-10-25 06:01:02 +02:00
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#[derive(Clone)]
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pub struct SubCommand;
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impl Command for SubCommand {
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fn name(&self) -> &str {
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"into int"
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}
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fn signature(&self) -> Signature {
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Signature::build("into int").rest(
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"rest",
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SyntaxShape::CellPath,
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"column paths to convert to int (for table input)",
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)
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}
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fn usage(&self) -> &str {
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"Convert value to integer"
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}
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fn run(
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&self,
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
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into_int(engine_state, stack, call, input)
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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: "Convert string to integer in table",
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example: "echo [[num]; ['-5'] [4] [1.5]] | into int num",
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result: None,
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},
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Example {
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description: "Convert string to integer",
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example: "'2' | into int",
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result: Some(Value::test_int(2)),
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},
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Example {
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description: "Convert decimal to integer",
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example: "5.9 | into int",
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result: Some(Value::test_int(5)),
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},
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Example {
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description: "Convert decimal string to integer",
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example: "'5.9' | into int",
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result: Some(Value::test_int(5)),
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},
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Example {
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description: "Convert file size to integer",
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example: "4KB | into int",
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result: Some(Value::Int {
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val: 4000,
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span: Span::unknown(),
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}),
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},
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Example {
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description: "Convert bool to integer",
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example: "[$false, $true] | into int",
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result: Some(Value::List {
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vals: vec![Value::test_int(0), Value::test_int(1)],
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span: Span::unknown(),
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}),
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},
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]
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}
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}
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fn into_int(
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
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let head = call.head;
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let column_paths: Vec<CellPath> = call.rest(engine_state, stack, 0)?;
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input.map(
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move |v| {
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if column_paths.is_empty() {
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action(&v, head)
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} else {
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let mut ret = v;
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for path in &column_paths {
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let r =
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ret.update_cell_path(&path.members, Box::new(move |old| action(old, head)));
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if let Err(error) = r {
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return Value::Error { error };
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}
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}
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ret
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}
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},
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engine_state.ctrlc.clone(),
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)
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}
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pub fn action(input: &Value, span: Span) -> Value {
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match input {
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Value::Int { .. } => input.clone(),
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Value::Filesize { val, .. } => Value::Int { val: *val, span },
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Value::Float { val, .. } => Value::Int {
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val: *val as i64,
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span,
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},
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Value::String { val, .. } => match int_from_string(val, span) {
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Ok(val) => Value::Int { val, span },
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Err(error) => Value::Error { error },
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},
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Value::Bool { val, .. } => {
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if *val {
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Value::Int { val: 1, span }
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} else {
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Value::Int { val: 0, span }
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}
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}
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_ => Value::Error {
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error: ShellError::UnsupportedInput("'into int' for unsupported type".into(), span),
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},
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}
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}
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fn int_from_string(a_string: &str, span: Span) -> Result<i64, ShellError> {
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match a_string.parse::<i64>() {
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Ok(n) => Ok(n),
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Err(_) => match a_string.parse::<f64>() {
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Ok(f) => Ok(f as i64),
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_ => Err(ShellError::CantConvert(
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"into int".into(),
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"string".into(),
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span,
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)),
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},
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn test_examples() {
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use crate::test_examples;
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test_examples(SubCommand {})
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}
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}
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