nushell/src/commands/from_json.rs
Yehuda Katz 34033afce4 WIP improve error infrastructure
Also simplify commands and reduce papercuts
2019-07-12 19:20:26 -07:00

55 lines
2.1 KiB
Rust

use crate::object::base::OF64;
use crate::object::{Dictionary, Primitive, Value};
use crate::prelude::*;
fn convert_json_value_to_nu_value(v: &serde_hjson::Value) -> Value {
match v {
serde_hjson::Value::Null => Value::Primitive(Primitive::String(String::from(""))),
serde_hjson::Value::Bool(b) => Value::Primitive(Primitive::Boolean(*b)),
serde_hjson::Value::F64(n) => Value::Primitive(Primitive::Float(OF64::from(*n))),
serde_hjson::Value::U64(n) => Value::Primitive(Primitive::Int(*n as i64)),
serde_hjson::Value::I64(n) => Value::Primitive(Primitive::Int(*n as i64)),
serde_hjson::Value::String(s) => Value::Primitive(Primitive::String(String::from(s))),
serde_hjson::Value::Array(a) => Value::List(
a.iter()
.map(|x| convert_json_value_to_nu_value(x))
.collect(),
),
serde_hjson::Value::Object(o) => {
let mut collected = Dictionary::default();
for (k, v) in o.iter() {
collected.add(k.clone(), convert_json_value_to_nu_value(v));
}
Value::Object(collected)
}
}
}
pub fn from_json_string_to_value(s: String) -> serde_hjson::Result<Value> {
let v: serde_hjson::Value = serde_hjson::from_str(&s)?;
Ok(convert_json_value_to_nu_value(&v))
}
pub fn from_json(args: CommandArgs) -> Result<OutputStream, ShellError> {
let out = args.input;
let span = args.name_span;
Ok(out
.values
.map(move |a| match a {
Value::Primitive(Primitive::String(s)) => match from_json_string_to_value(s) {
Ok(x) => ReturnSuccess::value(x),
Err(_) => Err(ShellError::maybe_labeled_error(
"Could not parse as JSON",
"piped data failed JSON parse",
span,
)),
},
_ => Err(ShellError::maybe_labeled_error(
"Expected string values from pipeline",
"expects strings from pipeline",
span,
)),
})
.to_output_stream())
}