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use std::collections::BTreeMap;
use std::fmt::Display;
use std::str::FromStr;
use crate::{
InputType, InputValueError, InputValueResult, Name, OutputType, Scalar, ScalarType, Value,
};
#[Scalar(internal, name = "JSONObject")]
impl<K, T> ScalarType for BTreeMap<K, T>
where
K: ToString + FromStr + Ord + Sync + Send,
K::Err: Display,
T: OutputType + InputType,
{
fn parse(value: Value) -> InputValueResult<Self> {
match value {
Value::Object(map) => map
.into_iter()
.map(|(name, value)| {
Ok((
K::from_str(&name).map_err(|err| {
InputValueError::custom(format!("object key: {}", err))
})?,
T::parse(Some(value))?,
))
})
.collect::<Result<_, _>>()
.map_err(InputValueError::propagate),
_ => Err(InputValueError::expected_type(value)),
}
}
fn to_value(&self) -> Value {
let mut map = BTreeMap::new();
for (name, value) in self {
map.insert(Name::new(name.to_string()), value.to_value());
}
Value::Object(map)
}
}