use libc::size_t;
use std::ptr;
use crate::sys::napi_value;
use crate::val::JsEnv;
use crate::NjError;
use crate::napi_call_result;
pub trait TryIntoJs {
fn try_to_js(self, js_env: &JsEnv) -> Result<napi_value, NjError>;
}
impl TryIntoJs for bool {
fn try_to_js(self, js_env: &JsEnv) -> Result<napi_value, NjError> {
js_env.create_boolean(self)
}
}
impl TryIntoJs for f64 {
fn try_to_js(self, js_env: &JsEnv) -> Result<napi_value, NjError> {
js_env.create_double(self)
}
}
impl TryIntoJs for i64 {
fn try_to_js(self, js_env: &JsEnv) -> Result<napi_value, NjError> {
js_env.create_int64(self)
}
}
impl TryIntoJs for i32 {
fn try_to_js(self, js_env: &JsEnv) -> Result<napi_value, NjError> {
js_env.create_int32(self)
}
}
impl TryIntoJs for u64 {
fn try_to_js(self, js_env: &JsEnv) -> Result<napi_value, NjError> {
js_env.create_bigint_uint64(self)
}
}
impl TryIntoJs for String {
fn try_to_js(self, js_env: &JsEnv) -> Result<napi_value, NjError> {
js_env.create_string_utf8(&self)
}
}
impl TryIntoJs for () {
fn try_to_js(self, js_env: &JsEnv) -> Result<napi_value, NjError> {
js_env.get_undefined()
}
}
impl<T, E> TryIntoJs for Result<T, E>
where
T: TryIntoJs,
E: ToString,
{
fn try_to_js(self, js_env: &JsEnv) -> Result<napi_value, NjError> {
match self {
Ok(val) => val.try_to_js(&js_env),
Err(err) => Err(NjError::Other(err.to_string())),
}
}
}
impl TryIntoJs for napi_value {
fn try_to_js(self, _js_env: &JsEnv) -> Result<napi_value, NjError> {
Ok(self)
}
}
impl<T> TryIntoJs for Vec<T>
where
T: TryIntoJs,
{
fn try_to_js(self, js_env: &JsEnv) -> Result<napi_value, NjError> {
let array = js_env.create_array_with_len(self.len())?;
for (i, element) in self.into_iter().enumerate() {
let js_element = element.try_to_js(js_env)?;
js_env.set_element(array, js_element, i)?;
}
Ok(array)
}
}
pub trait IntoJs {
fn to_js(self, js_env: &JsEnv) -> napi_value;
}
pub trait JSValue<'a>: Sized {
fn label() -> &'static str {
std::any::type_name::<Self>()
}
fn convert_to_rust(env: &'a JsEnv, js_value: napi_value) -> Result<Self, NjError>;
}
impl JSValue<'_> for f64 {
fn convert_to_rust(env: &JsEnv, js_value: napi_value) -> Result<Self, NjError> {
env.assert_type(js_value, crate::sys::napi_valuetype_napi_number)?;
let mut value: f64 = 0.0;
napi_call_result!(crate::sys::napi_get_value_double(
env.inner(),
js_value,
&mut value
))?;
Ok(value)
}
}
impl JSValue<'_> for i32 {
fn convert_to_rust(env: &JsEnv, js_value: napi_value) -> Result<Self, NjError> {
env.assert_type(js_value, crate::sys::napi_valuetype_napi_number)?;
let mut value: i32 = 0;
napi_call_result!(crate::sys::napi_get_value_int32(
env.inner(),
js_value,
&mut value
))?;
Ok(value)
}
}
impl JSValue<'_> for u32 {
fn convert_to_rust(env: &JsEnv, js_value: napi_value) -> Result<Self, NjError> {
env.assert_type(js_value, crate::sys::napi_valuetype_napi_number)?;
let mut value: u32 = 0;
napi_call_result!(crate::sys::napi_get_value_uint32(
env.inner(),
js_value,
&mut value
))?;
Ok(value)
}
}
impl JSValue<'_> for i64 {
fn convert_to_rust(env: &JsEnv, js_value: napi_value) -> Result<Self, NjError> {
env.assert_type(js_value, crate::sys::napi_valuetype_napi_number)?;
let mut value: i64 = 0;
napi_call_result!(crate::sys::napi_get_value_int64(
env.inner(),
js_value,
&mut value
))?;
Ok(value)
}
}
impl JSValue<'_> for bool {
fn convert_to_rust(env: &JsEnv, js_value: napi_value) -> Result<Self, NjError> {
env.assert_type(js_value, crate::sys::napi_valuetype_napi_boolean)?;
let mut value: bool = false;
napi_call_result!(crate::sys::napi_get_value_bool(
env.inner(),
js_value,
&mut value
))?;
Ok(value)
}
}
impl JSValue<'_> for String {
fn convert_to_rust(env: &JsEnv, js_value: napi_value) -> Result<Self, NjError> {
env.assert_type(js_value, crate::sys::napi_valuetype_napi_string)?;
use crate::sys::napi_get_value_string_utf8;
let mut string_size: size_t = 0;
napi_call_result!(napi_get_value_string_utf8(
env.inner(),
js_value,
ptr::null_mut(),
0,
&mut string_size
))?;
string_size += 1;
let chars_vec: Vec<u8> = vec![0; string_size];
let mut chars: Box<[u8]> = chars_vec.into_boxed_slice();
let mut read_size: size_t = 0;
napi_call_result!(napi_get_value_string_utf8(
env.inner(),
js_value,
chars.as_mut_ptr() as *mut i8,
string_size,
&mut read_size
))?;
let my_chars: Vec<u8> = chars[0..read_size].into();
String::from_utf8(my_chars).map_err(|err| err.into())
}
}
impl<'a, T> JSValue<'a> for Vec<T>
where
T: JSValue<'a>,
{
fn convert_to_rust(env: &'a JsEnv, js_value: napi_value) -> Result<Self, NjError> {
if !env.is_array(js_value)? {
return Err(NjError::Other("not array".to_owned()));
}
use crate::sys::napi_get_array_length;
let mut length: u32 = 0;
napi_call_result!(napi_get_array_length(env.inner(), js_value, &mut length))?;
let mut elements = vec![];
for i in 0..length {
let js_element = env.get_element(js_value, i)?;
elements.push(T::convert_to_rust(env, js_element)?);
}
Ok(elements)
}
}