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use std::sync::Arc;
use anyhow::Context as _;
use napi::bindgen_prelude::*;
use swc_core::{
base::{config::ParseOptions, try_with_handler},
common::{
FileName, FilePathMapping, GLOBALS, SourceMap, comments::Comments, errors::ColorConfig,
},
};
use crate::util::MapErr;
pub struct ParseTask {
pub filename: FileName,
pub src: String,
pub options: Buffer,
}
#[napi]
impl Task for ParseTask {
type Output = String;
type JsValue = String;
fn compute(&mut self) -> napi::Result<Self::Output> {
GLOBALS.set(&Default::default(), || {
let c =
swc_core::base::Compiler::new(Arc::new(SourceMap::new(FilePathMapping::empty())));
let options: ParseOptions = serde_json::from_slice(self.options.as_ref())?;
let comments = c.comments().clone();
let comments: Option<&dyn Comments> = if options.comments {
Some(&comments)
} else {
None
};
let fm =
c.cm.new_source_file(self.filename.clone().into(), self.src.clone());
let program = try_with_handler(
c.cm.clone(),
swc_core::base::HandlerOpts {
color: ColorConfig::Never,
skip_filename: false,
},
|handler| {
c.parse_js(
fm,
handler,
options.target,
options.syntax,
options.is_module,
comments,
)
},
)
.map_err(|e| e.to_pretty_error())
.convert_err()?;
let ast_json = serde_json::to_string(&program)
.context("failed to serialize Program")
.convert_err()?;
Ok(ast_json)
})
}
fn resolve(&mut self, _env: Env, result: Self::Output) -> napi::Result<Self::JsValue> {
Ok(result)
}
}
#[napi]
pub fn parse(
src: String,
options: Buffer,
filename: Option<String>,
signal: Option<AbortSignal>,
) -> AsyncTask<ParseTask> {
let filename = if let Some(value) = filename {
FileName::Real(value.into())
} else {
FileName::Anon
};
AsyncTask::with_optional_signal(
ParseTask {
filename,
src,
options,
},
signal,
)
}
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