forked from extern/nushell
113 lines
3.6 KiB
Rust
113 lines
3.6 KiB
Rust
use crate::commands::WholeStreamCommand;
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use crate::object::base::OF64;
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use crate::object::{Primitive, TaggedDictBuilder, Value};
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use crate::prelude::*;
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pub struct FromJSON;
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impl WholeStreamCommand for FromJSON {
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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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from_json(args, registry)
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}
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fn name(&self) -> &str {
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"from-json"
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}
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fn signature(&self) -> Signature {
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Signature::build("from-json")
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}
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}
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fn convert_json_value_to_nu_value(v: &serde_hjson::Value, tag: impl Into<Tag>) -> Tagged<Value> {
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let tag = tag.into();
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match v {
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serde_hjson::Value::Null => {
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Value::Primitive(Primitive::String(String::from(""))).tagged(tag)
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}
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serde_hjson::Value::Bool(b) => Value::Primitive(Primitive::Boolean(*b)).tagged(tag),
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serde_hjson::Value::F64(n) => {
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Value::Primitive(Primitive::Float(OF64::from(*n))).tagged(tag)
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}
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serde_hjson::Value::U64(n) => Value::Primitive(Primitive::Int(*n as i64)).tagged(tag),
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serde_hjson::Value::I64(n) => Value::Primitive(Primitive::Int(*n as i64)).tagged(tag),
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serde_hjson::Value::String(s) => {
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Value::Primitive(Primitive::String(String::from(s))).tagged(tag)
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}
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serde_hjson::Value::Array(a) => Value::List(
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a.iter()
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.map(|x| convert_json_value_to_nu_value(x, tag))
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.collect(),
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)
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.tagged(tag),
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serde_hjson::Value::Object(o) => {
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let mut collected = TaggedDictBuilder::new(tag);
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for (k, v) in o.iter() {
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collected.insert_tagged(k.clone(), convert_json_value_to_nu_value(v, tag));
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}
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collected.into_tagged_value()
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}
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}
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}
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pub fn from_json_string_to_value(
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s: String,
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tag: impl Into<Tag>,
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) -> serde_hjson::Result<Tagged<Value>> {
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let v: serde_hjson::Value = serde_hjson::from_str(&s)?;
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Ok(convert_json_value_to_nu_value(&v, tag))
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}
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fn from_json(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
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let args = args.evaluate_once(registry)?;
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let span = args.name_span();
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let input = args.input;
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let stream = async_stream_block! {
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let values: Vec<Tagged<Value>> = input.values.collect().await;
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let mut concat_string = String::new();
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let mut latest_tag: Option<Tag> = None;
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for value in values {
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let value_tag = value.tag();
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latest_tag = Some(value_tag);
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match value.item {
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Value::Primitive(Primitive::String(s)) => {
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concat_string.push_str(&s);
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concat_string.push_str("\n");
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}
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_ => yield Err(ShellError::labeled_error_with_secondary(
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"Expected a string from pipeline",
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"requires string input",
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span,
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"value originates from here",
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value_tag.span,
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)),
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}
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}
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match from_json_string_to_value(concat_string, span) {
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Ok(x) => yield ReturnSuccess::value(x),
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Err(_) => if let Some(last_tag) = latest_tag {
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yield Err(ShellError::labeled_error_with_secondary(
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"Could not parse as JSON",
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"input cannot be parsed as JSON",
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span,
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"value originates from here",
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last_tag.span,
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))
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} ,
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}
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};
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Ok(stream.to_output_stream())
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}
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