1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47

#![deny(warnings)]

use std::any::type_name;

use anyhow::Context;
use napi::Status;
use serde::de::DeserializeOwned;

pub trait MapErr<T>: Into<Result<T, anyhow::Error>> {
    fn convert_err(self) -> napi::Result<T> {
        self.into()
            .map_err(|err| napi::Error::new(Status::GenericFailure, format!("{:?}", err)))
    }
}

impl<T> MapErr<T> for Result<T, anyhow::Error> {}

pub fn get_deserialized<T, B>(buffer: B) -> napi::Result<T>
where
    T: DeserializeOwned,
    B: AsRef<[u8]>,
{
    let mut deserializer = serde_json::Deserializer::from_slice(buffer.as_ref());
    deserializer.disable_recursion_limit();

    let v = T::deserialize(&mut deserializer)
        .with_context(|| {
            format!(
                "Failed to deserialize buffer as {}\nJSON: {}",
                type_name::<T>(),
                String::from_utf8_lossy(buffer.as_ref())
            )
        })
        .convert_err()?;

    Ok(v)
}

pub fn deserialize_json<T>(json: &str) -> Result<T, serde_json::Error>
where
    T: DeserializeOwned,
{
    let mut deserializer = serde_json::Deserializer::from_str(json);
    deserializer.disable_recursion_limit();

    T::deserialize(&mut deserializer)
}