nitr 0.0.0-beta.1

A Rust web server embedding Lua for fast, efficient and safe dynamic backends.
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use mlua::{
    AnyUserData, ExternalResult, Lua, LuaSerdeExt, LuaString, UserData, UserDataMethods, Value,
};
use serde_json::Value as SerdeValue;

#[derive(Default)]
pub(crate) struct LuaJson;

impl UserData for LuaJson {
    fn add_methods<M: UserDataMethods<Self>>(methods: &mut M) {
        methods.add_method_mut("encode", |lua, _, input: Value| {
            let s = serde_json::to_string(&input).into_lua_err()?;
            lua.to_value(&s)
        });

        methods.add_method_mut("decode", |lua, _, input: LuaString| {
            let v = serde_json::from_slice::<SerdeValue>(&input.as_bytes()).into_lua_err()?;
            lua.to_value(&v)
        });
    }
}

/// JSON encode function via Serde.
pub(crate) fn create_json_fn(lua: &Lua) -> mlua::Result<AnyUserData> {
    lua.create_userdata(LuaJson)
}