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use std::str::FromStr;
pub use browserslist::Version;
use rustc_hash::FxHashMap;
use serde::Deserialize;
use crate::{BrowserslistQuery, Engine, EngineTargets};
/// <https://babel.dev/docs/babel-preset-env#targets>
#[derive(Debug, Deserialize)]
#[serde(untagged)]
pub enum BabelTargets {
String(String),
Array(Vec<String>),
/// For Deserializing
/// * `esmodules`: `boolean`
/// * `node`: `string | "current" | true`
/// * `safari`: `string | "tp"`
/// * `browsers`: `string | Array<string>.`
/// * `deno`: `string`
Map(FxHashMap<String, BabelTargetsValue>),
}
#[derive(Debug, Deserialize)]
#[serde(untagged)]
pub enum BabelTargetsValue {
String(String),
Array(Vec<String>),
Bool(bool),
Int(u32),
Float(f64),
}
impl TryFrom<BabelTargets> for EngineTargets {
type Error = String;
fn try_from(value: BabelTargets) -> Result<Self, Self::Error> {
match value {
BabelTargets::String(s) => BrowserslistQuery::Single(s).exec(),
BabelTargets::Array(v) => BrowserslistQuery::Multiple(v).exec(),
BabelTargets::Map(map) => {
let mut engine_targets = Self::default();
for (key, value) in map {
// TODO: Implement these targets.
if matches!(key.as_str(), "esmodules" | "browsers") {
continue;
}
// TODO: Implement `Version::from_number`
if matches!(value, BabelTargetsValue::Int(_) | BabelTargetsValue::Float(_)) {
continue;
}
let BabelTargetsValue::String(v) = value else {
return Err(format!("{value:?} is not a string for {key}."));
};
// TODO: Implement this target.
if key == "node" && v == "current" {
continue;
}
// TODO: Implement this target.
if key == "safari" && v == "tp" {
continue;
}
// TODO: Some keys are not implemented yet.
// <https://babel.dev/docs/options#targets>:
// Supported environments: android, chrome, deno, edge, electron, firefox, ie, ios, node, opera, rhino, safari, samsung.
let Ok(engine) = Engine::from_str(&key) else {
return Err(format!("engine '{key}' is not supported."));
};
match Version::parse(&v) {
Ok(version) => {
engine_targets.insert(engine, version);
}
Err(err) => {
return Err(format!("Failed to parse `{v}` for `{key}`\n{err:?}"));
}
}
}
Ok(engine_targets)
}
}
}
}