Struct napi::JsObject

source · 
pub struct JsObject(_);

Implementations§

Examples found in repository?
src/bindgen_runtime/js_values/map.rs (line 43)
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  unsafe fn from_napi_value(env: sys::napi_env, napi_val: sys::napi_value) -> Result<Self> {
    let obj = unsafe { Object::from_napi_value(env, napi_val)? };
    let mut map = HashMap::new();
    for key in Object::keys(&obj)?.into_iter() {
      if let Some(val) = obj.get(&key)? {
        map.insert(K::from(key), val);
      }
    }

    Ok(map)
  }
More examples
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src/bindgen_runtime/js_values/serde.rs (line 103)
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  unsafe fn from_napi_value(env: sys::napi_env, napi_val: sys::napi_value) -> Result<Self> {
    let obj = JsObject(crate::Value {
      env,
      value: napi_val,
      value_type: ValueType::Object,
    });

    let mut map = Map::new();
    for key in Object::keys(&obj)?.into_iter() {
      if let Some(val) = obj.get(&key)? {
        map.insert(key, val);
      }
    }

    Ok(map)
  }
Examples found in repository?
src/bindgen_runtime/js_values/serde.rs (line 86)
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  unsafe fn to_napi_value(env: sys::napi_env, val: Self) -> Result<sys::napi_value> {
    let mut obj = Object::new(env)?;

    for (k, v) in val.into_iter() {
      obj.set(k, v)?;
    }

    unsafe { Object::to_napi_value(env, obj) }
  }
More examples
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src/bindgen_runtime/js_values/map.rs (line 27)
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  unsafe fn to_napi_value(raw_env: sys::napi_env, val: Self) -> Result<sys::napi_value> {
    let env = Env::from(raw_env);
    let mut obj = env.create_object()?;
    for (k, v) in val.into_iter() {
      obj.set(k.as_ref(), v)?;
    }

    unsafe { Object::to_napi_value(raw_env, obj) }
  }
Examples found in repository?
src/bindgen_runtime/js_values/map.rs (line 42)
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  unsafe fn from_napi_value(env: sys::napi_env, napi_val: sys::napi_value) -> Result<Self> {
    let obj = unsafe { Object::from_napi_value(env, napi_val)? };
    let mut map = HashMap::new();
    for key in Object::keys(&obj)?.into_iter() {
      if let Some(val) = obj.get(&key)? {
        map.insert(K::from(key), val);
      }
    }

    Ok(map)
  }
More examples
Hide additional examples
src/bindgen_runtime/js_values/serde.rs (line 102)
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  unsafe fn from_napi_value(env: sys::napi_env, napi_val: sys::napi_value) -> Result<Self> {
    let obj = JsObject(crate::Value {
      env,
      value: napi_val,
      value_type: ValueType::Object,
    });

    let mut map = Map::new();
    for key in Object::keys(&obj)?.into_iter() {
      if let Some(val) = obj.get(&key)? {
        map.insert(key, val);
      }
    }

    Ok(map)
  }
Examples found in repository?
src/js_values/de.rs (line 45)
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  fn deserialize_any<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    let js_value_type = type_of!(self.0.env, self.0.value)?;
    match js_value_type {
      ValueType::Null | ValueType::Undefined => visitor.visit_unit(),
      ValueType::Boolean => {
        let js_boolean = unsafe { JsBoolean::from_raw_unchecked(self.0.env, self.0.value) };
        visitor.visit_bool(js_boolean.get_value()?)
      }
      ValueType::Number => {
        let js_number: f64 =
          unsafe { JsNumber::from_raw_unchecked(self.0.env, self.0.value).try_into()? };
        if (js_number.trunc() - js_number).abs() < f64::EPSILON {
          visitor.visit_i64(js_number as i64)
        } else {
          visitor.visit_f64(js_number)
        }
      }
      ValueType::String => {
        let js_string = unsafe { JsString::from_raw_unchecked(self.0.env, self.0.value) };
        visitor.visit_str(js_string.into_utf8()?.as_str()?)
      }
      ValueType::Object => {
        let js_object = unsafe { JsObject::from_raw_unchecked(self.0.env, self.0.value) };
        if js_object.is_array()? {
          let mut deserializer =
            JsArrayAccess::new(&js_object, js_object.get_array_length_unchecked()?);
          visitor.visit_seq(&mut deserializer)
        } else if js_object.is_buffer()? {
          visitor.visit_bytes(&JsBufferValue::from_raw(self.0.env, self.0.value)?)
        } else {
          let mut deserializer = JsObjectAccess::new(&js_object)?;
          visitor.visit_map(&mut deserializer)
        }
      }
      #[cfg(feature = "napi6")]
      ValueType::BigInt => {
        let mut js_bigint = unsafe { JsBigInt::from_raw(self.0.env, self.0.value)? };
        let (signed, v, _loss) = js_bigint.get_u128()?;
        if signed {
          visitor.visit_i128(-(v as i128))
        } else {
          visitor.visit_u128(v)
        }
      }
      ValueType::External | ValueType::Function | ValueType::Symbol => Err(Error::new(
        Status::InvalidArg,
        format!("typeof {:?} value could not be deserialized", js_value_type),
      )),
      ValueType::Unknown => unreachable!(),
    }
  }

  fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    visitor.visit_bytes(&JsBufferValue::from_raw(self.0.env, self.0.value)?)
  }

  fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    visitor.visit_bytes(&JsBufferValue::from_raw(self.0.env, self.0.value)?)
  }

  fn deserialize_option<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    match type_of!(self.0.env, self.0.value)? {
      ValueType::Undefined | ValueType::Null => visitor.visit_none(),
      _ => visitor.visit_some(self),
    }
  }

  fn deserialize_enum<V>(
    self,
    _name: &'static str,
    _variants: &'static [&'static str],
    visitor: V,
  ) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    let js_value_type = type_of!(self.0.env, self.0.value)?;
    match js_value_type {
      ValueType::String => visitor.visit_enum(JsEnumAccess::new(
        unsafe { JsString::from_raw_unchecked(self.0.env, self.0.value) }
          .into_utf8()?
          .into_owned()?,
        None,
      )),
      ValueType::Object => {
        let js_object = unsafe { JsObject::from_raw_unchecked(self.0.env, self.0.value) };
        let properties = js_object.get_property_names()?;
        let property_len = properties.get_array_length_unchecked()?;
        if property_len != 1 {
          Err(Error::new(
            Status::InvalidArg,
            format!(
              "object key length: {}, can not deserialize to Enum",
              property_len
            ),
          ))
        } else {
          let key = properties.get_element::<JsString>(0)?;
          let value: JsUnknown = js_object.get_property(key)?;
          visitor.visit_enum(JsEnumAccess::new(
            key.into_utf8()?.into_owned()?,
            Some(&value.0),
          ))
        }
      }
      _ => Err(Error::new(
        Status::InvalidArg,
        format!(
          "{:?} type could not deserialize to Enum type",
          js_value_type
        ),
      )),
    }
  }

  fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    visitor.visit_unit()
  }

  forward_to_deserialize_any! {
     <V: Visitor<'x>>
      bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
      unit unit_struct seq tuple tuple_struct map struct identifier
      newtype_struct
  }
}

#[doc(hidden)]
pub(crate) struct JsEnumAccess<'env> {
  variant: String,
  value: Option<&'env Value>,
}

#[doc(hidden)]
impl<'env> JsEnumAccess<'env> {
  fn new(variant: String, value: Option<&'env Value>) -> Self {
    Self { variant, value }
  }
}

#[doc(hidden)]
impl<'de, 'env> EnumAccess<'de> for JsEnumAccess<'env> {
  type Error = Error;
  type Variant = JsVariantAccess<'env>;

  fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant)>
  where
    V: DeserializeSeed<'de>,
  {
    use serde::de::IntoDeserializer;
    let variant = self.variant.into_deserializer();
    let variant_access = JsVariantAccess { value: self.value };
    seed.deserialize(variant).map(|v| (v, variant_access))
  }
}

#[doc(hidden)]
pub(crate) struct JsVariantAccess<'env> {
  value: Option<&'env Value>,
}

#[doc(hidden)]
impl<'de, 'env> VariantAccess<'de> for JsVariantAccess<'env> {
  type Error = Error;
  fn unit_variant(self) -> Result<()> {
    match self.value {
      Some(val) => {
        let mut deserializer = De(val);
        serde::de::Deserialize::deserialize(&mut deserializer)
      }
      None => Ok(()),
    }
  }

  fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value>
  where
    T: DeserializeSeed<'de>,
  {
    match self.value {
      Some(val) => {
        let mut deserializer = De(val);
        seed.deserialize(&mut deserializer)
      }
      None => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"newtype variant",
      )),
    }
  }

  fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'de>,
  {
    match self.value {
      Some(js_value) => {
        let js_object = unsafe { JsObject::from_raw(js_value.env, js_value.value)? };
        if js_object.is_array()? {
          let mut deserializer =
            JsArrayAccess::new(&js_object, js_object.get_array_length_unchecked()?);
          visitor.visit_seq(&mut deserializer)
        } else {
          Err(serde::de::Error::invalid_type(
            Unexpected::Other("JsValue"),
            &"tuple variant",
          ))
        }
      }
      None => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"tuple variant",
      )),
    }
  }
Examples found in repository?
src/js_values/de.rs (line 49)
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  fn deserialize_any<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    let js_value_type = type_of!(self.0.env, self.0.value)?;
    match js_value_type {
      ValueType::Null | ValueType::Undefined => visitor.visit_unit(),
      ValueType::Boolean => {
        let js_boolean = unsafe { JsBoolean::from_raw_unchecked(self.0.env, self.0.value) };
        visitor.visit_bool(js_boolean.get_value()?)
      }
      ValueType::Number => {
        let js_number: f64 =
          unsafe { JsNumber::from_raw_unchecked(self.0.env, self.0.value).try_into()? };
        if (js_number.trunc() - js_number).abs() < f64::EPSILON {
          visitor.visit_i64(js_number as i64)
        } else {
          visitor.visit_f64(js_number)
        }
      }
      ValueType::String => {
        let js_string = unsafe { JsString::from_raw_unchecked(self.0.env, self.0.value) };
        visitor.visit_str(js_string.into_utf8()?.as_str()?)
      }
      ValueType::Object => {
        let js_object = unsafe { JsObject::from_raw_unchecked(self.0.env, self.0.value) };
        if js_object.is_array()? {
          let mut deserializer =
            JsArrayAccess::new(&js_object, js_object.get_array_length_unchecked()?);
          visitor.visit_seq(&mut deserializer)
        } else if js_object.is_buffer()? {
          visitor.visit_bytes(&JsBufferValue::from_raw(self.0.env, self.0.value)?)
        } else {
          let mut deserializer = JsObjectAccess::new(&js_object)?;
          visitor.visit_map(&mut deserializer)
        }
      }
      #[cfg(feature = "napi6")]
      ValueType::BigInt => {
        let mut js_bigint = unsafe { JsBigInt::from_raw(self.0.env, self.0.value)? };
        let (signed, v, _loss) = js_bigint.get_u128()?;
        if signed {
          visitor.visit_i128(-(v as i128))
        } else {
          visitor.visit_u128(v)
        }
      }
      ValueType::External | ValueType::Function | ValueType::Symbol => Err(Error::new(
        Status::InvalidArg,
        format!("typeof {:?} value could not be deserialized", js_value_type),
      )),
      ValueType::Unknown => unreachable!(),
    }
  }
Examples found in repository?
src/js_values/ser.rs (lines 410-417)
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  fn serialize_value<T: ?Sized>(&mut self, value: &T) -> StdResult<(), Self::Error>
  where
    T: Serialize,
  {
    let env = unsafe { Env::from_raw(self.obj.0.env) };
    self.obj.set_property(
      JsString(Value {
        env: self.key.0.env,
        value: self.key.0.value,
        value_type: ValueType::String,
      }),
      JsUnknown(value.serialize(Ser::new(&env))?),
    )?;
    Ok(())
  }

  fn serialize_entry<K: ?Sized, V: ?Sized>(
    &mut self,
    key: &K,
    value: &V,
  ) -> StdResult<(), Self::Error>
  where
    K: Serialize,
    V: Serialize,
  {
    let env = unsafe { Env::from_raw(self.obj.0.env) };
    self.obj.set_property(
      JsString(key.serialize(Ser::new(&env))?),
      JsUnknown(value.serialize(Ser::new(&env))?),
    )?;
    Ok(())
  }
Examples found in repository?
src/js_values/de.rs (line 129)
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  fn deserialize_enum<V>(
    self,
    _name: &'static str,
    _variants: &'static [&'static str],
    visitor: V,
  ) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    let js_value_type = type_of!(self.0.env, self.0.value)?;
    match js_value_type {
      ValueType::String => visitor.visit_enum(JsEnumAccess::new(
        unsafe { JsString::from_raw_unchecked(self.0.env, self.0.value) }
          .into_utf8()?
          .into_owned()?,
        None,
      )),
      ValueType::Object => {
        let js_object = unsafe { JsObject::from_raw_unchecked(self.0.env, self.0.value) };
        let properties = js_object.get_property_names()?;
        let property_len = properties.get_array_length_unchecked()?;
        if property_len != 1 {
          Err(Error::new(
            Status::InvalidArg,
            format!(
              "object key length: {}, can not deserialize to Enum",
              property_len
            ),
          ))
        } else {
          let key = properties.get_element::<JsString>(0)?;
          let value: JsUnknown = js_object.get_property(key)?;
          visitor.visit_enum(JsEnumAccess::new(
            key.into_utf8()?.into_owned()?,
            Some(&value.0),
          ))
        }
      }
      _ => Err(Error::new(
        Status::InvalidArg,
        format!(
          "{:?} type could not deserialize to Enum type",
          js_value_type
        ),
      )),
    }
  }

  fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    visitor.visit_unit()
  }

  forward_to_deserialize_any! {
     <V: Visitor<'x>>
      bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
      unit unit_struct seq tuple tuple_struct map struct identifier
      newtype_struct
  }
}

#[doc(hidden)]
pub(crate) struct JsEnumAccess<'env> {
  variant: String,
  value: Option<&'env Value>,
}

#[doc(hidden)]
impl<'env> JsEnumAccess<'env> {
  fn new(variant: String, value: Option<&'env Value>) -> Self {
    Self { variant, value }
  }
}

#[doc(hidden)]
impl<'de, 'env> EnumAccess<'de> for JsEnumAccess<'env> {
  type Error = Error;
  type Variant = JsVariantAccess<'env>;

  fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant)>
  where
    V: DeserializeSeed<'de>,
  {
    use serde::de::IntoDeserializer;
    let variant = self.variant.into_deserializer();
    let variant_access = JsVariantAccess { value: self.value };
    seed.deserialize(variant).map(|v| (v, variant_access))
  }
}

#[doc(hidden)]
pub(crate) struct JsVariantAccess<'env> {
  value: Option<&'env Value>,
}

#[doc(hidden)]
impl<'de, 'env> VariantAccess<'de> for JsVariantAccess<'env> {
  type Error = Error;
  fn unit_variant(self) -> Result<()> {
    match self.value {
      Some(val) => {
        let mut deserializer = De(val);
        serde::de::Deserialize::deserialize(&mut deserializer)
      }
      None => Ok(()),
    }
  }

  fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value>
  where
    T: DeserializeSeed<'de>,
  {
    match self.value {
      Some(val) => {
        let mut deserializer = De(val);
        seed.deserialize(&mut deserializer)
      }
      None => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"newtype variant",
      )),
    }
  }

  fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'de>,
  {
    match self.value {
      Some(js_value) => {
        let js_object = unsafe { JsObject::from_raw(js_value.env, js_value.value)? };
        if js_object.is_array()? {
          let mut deserializer =
            JsArrayAccess::new(&js_object, js_object.get_array_length_unchecked()?);
          visitor.visit_seq(&mut deserializer)
        } else {
          Err(serde::de::Error::invalid_type(
            Unexpected::Other("JsValue"),
            &"tuple variant",
          ))
        }
      }
      None => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"tuple variant",
      )),
    }
  }

  fn struct_variant<V>(self, _fields: &'static [&'static str], visitor: V) -> Result<V::Value>
  where
    V: Visitor<'de>,
  {
    match self.value {
      Some(js_value) => {
        if let Ok(val) = unsafe { JsObject::from_raw(js_value.env, js_value.value) } {
          let mut deserializer = JsObjectAccess::new(&val)?;
          visitor.visit_map(&mut deserializer)
        } else {
          Err(serde::de::Error::invalid_type(
            Unexpected::Other("JsValue"),
            &"struct variant",
          ))
        }
      }
      _ => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"struct variant",
      )),
    }
  }
}

#[doc(hidden)]
struct JsArrayAccess<'env> {
  input: &'env JsObject,
  idx: u32,
  len: u32,
}

#[doc(hidden)]
impl<'env> JsArrayAccess<'env> {
  fn new(input: &'env JsObject, len: u32) -> Self {
    Self { input, idx: 0, len }
  }
}

#[doc(hidden)]
impl<'de, 'env> SeqAccess<'de> for JsArrayAccess<'env> {
  type Error = Error;

  fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>>
  where
    T: DeserializeSeed<'de>,
  {
    if self.idx >= self.len {
      return Ok(None);
    }
    let v = self.input.get_element::<JsUnknown>(self.idx)?;
    self.idx += 1;

    let mut de = De(&v.0);
    seed.deserialize(&mut de).map(Some)
  }
}

#[doc(hidden)]
pub(crate) struct JsObjectAccess<'env> {
  value: &'env JsObject,
  properties: JsObject,
  idx: u32,
  property_len: u32,
}

#[doc(hidden)]
impl<'env> JsObjectAccess<'env> {
  fn new(value: &'env JsObject) -> Result<Self> {
    let properties = value.get_property_names()?;
    let property_len = properties.get_array_length_unchecked()?;
    Ok(Self {
      value,
      properties,
      idx: 0,
      property_len,
    })
  }
}

#[doc(hidden)]
impl<'de, 'env> MapAccess<'de> for JsObjectAccess<'env> {
  type Error = Error;

  fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>>
  where
    K: DeserializeSeed<'de>,
  {
    if self.idx >= self.property_len {
      return Ok(None);
    }

    let prop_name = self.properties.get_element::<JsUnknown>(self.idx)?;

    let mut de = De(&prop_name.0);
    seed.deserialize(&mut de).map(Some)
  }

  fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value>
  where
    V: DeserializeSeed<'de>,
  {
    if self.idx >= self.property_len {
      return Err(Error::new(
        Status::InvalidArg,
        format!("Index:{} out of range: {}", self.property_len, self.idx),
      ));
    }
    let prop_name = self.properties.get_element::<JsString>(self.idx)?;
    let value: JsUnknown = self.value.get_property(prop_name)?;

    self.idx += 1;
    let mut de = De(&value.0);
    let res = seed.deserialize(&mut de)?;
    Ok(res)
  }
Examples found in repository?
src/js_values/ser.rs (lines 194-201)
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  fn serialize_tuple_variant(
    self,
    _name: &'static str,
    _variant_index: u32,
    variant: &'static str,
    len: usize,
  ) -> Result<Self::SerializeTupleVariant> {
    let env = self.0;
    let array = env.create_array_with_length(len)?;
    let mut object = env.create_object()?;
    object.set_named_property(
      variant,
      JsObject(Value {
        value: array.0.value,
        env: array.0.env,
        value_type: ValueType::Object,
      }),
    )?;
    Ok(SeqSerializer {
      current_index: 0,
      array,
    })
  }

  fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok> {
    self.0.get_null().map(|null| null.0)
  }

  fn serialize_unit_variant(
    self,
    _name: &'static str,
    _variant_index: u32,
    variant: &'static str,
  ) -> Result<Self::Ok> {
    self.0.create_string(variant).map(|string| string.0)
  }

  fn serialize_newtype_struct<T: ?Sized>(self, _name: &'static str, value: &T) -> Result<Self::Ok>
  where
    T: Serialize,
  {
    value.serialize(self)
  }

  fn serialize_newtype_variant<T: ?Sized>(
    self,
    _name: &'static str,
    _variant_index: u32,
    variant: &'static str,
    value: &T,
  ) -> Result<Self::Ok>
  where
    T: Serialize,
  {
    let mut obj = self.0.create_object()?;
    obj.set_named_property(variant, JsUnknown(value.serialize(self)?))?;
    Ok(obj.0)
  }

  fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple> {
    Ok(SeqSerializer {
      array: self.0.create_array_with_length(len)?,
      current_index: 0,
    })
  }

  fn serialize_tuple_struct(
    self,
    _name: &'static str,
    len: usize,
  ) -> Result<Self::SerializeTupleStruct> {
    Ok(SeqSerializer {
      array: self.0.create_array_with_length(len)?,
      current_index: 0,
    })
  }

  fn serialize_struct(self, _name: &'static str, _len: usize) -> Result<Self::SerializeStruct> {
    Ok(StructSerializer {
      obj: self.0.create_object()?,
    })
  }

  fn serialize_struct_variant(
    self,
    _name: &'static str,
    _variant_index: u32,
    variant: &'static str,
    _len: usize,
  ) -> Result<Self::SerializeStructVariant> {
    let mut outer = self.0.create_object()?;
    let inner = self.0.create_object()?;
    outer.set_named_property(
      variant,
      JsObject(Value {
        env: inner.0.env,
        value: inner.0.value,
        value_type: ValueType::Object,
      }),
    )?;
    Ok(StructSerializer {
      obj: self.0.create_object()?,
    })
  }
}

pub struct SeqSerializer {
  array: JsObject,
  current_index: usize,
}

impl ser::SerializeSeq for SeqSerializer {
  type Ok = Value;
  type Error = Error;

  fn serialize_element<T: ?Sized>(&mut self, value: &T) -> StdResult<(), Self::Error>
  where
    T: Serialize,
  {
    let env = unsafe { Env::from_raw(self.array.0.env) };
    self.array.set_element(
      self.current_index as _,
      JsUnknown(value.serialize(Ser::new(&env))?),
    )?;
    self.current_index += 1;
    Ok(())
  }

  fn end(self) -> Result<Self::Ok> {
    Ok(self.array.0)
  }
}

#[doc(hidden)]
impl ser::SerializeTuple for SeqSerializer {
  type Ok = Value;
  type Error = Error;

  fn serialize_element<T: ?Sized>(&mut self, value: &T) -> StdResult<(), Self::Error>
  where
    T: Serialize,
  {
    let env = unsafe { Env::from_raw(self.array.0.env) };
    self.array.set_element(
      self.current_index as _,
      JsUnknown(value.serialize(Ser::new(&env))?),
    )?;
    self.current_index += 1;
    Ok(())
  }

  fn end(self) -> StdResult<Self::Ok, Self::Error> {
    Ok(self.array.0)
  }
}

#[doc(hidden)]
impl ser::SerializeTupleStruct for SeqSerializer {
  type Ok = Value;
  type Error = Error;

  fn serialize_field<T: ?Sized>(&mut self, value: &T) -> StdResult<(), Self::Error>
  where
    T: Serialize,
  {
    let env = unsafe { Env::from_raw(self.array.0.env) };
    self.array.set_element(
      self.current_index as _,
      JsUnknown(value.serialize(Ser::new(&env))?),
    )?;
    self.current_index += 1;
    Ok(())
  }

  fn end(self) -> StdResult<Self::Ok, Self::Error> {
    Ok(self.array.0)
  }
}

#[doc(hidden)]
impl ser::SerializeTupleVariant for SeqSerializer {
  type Ok = Value;
  type Error = Error;

  fn serialize_field<T: ?Sized>(&mut self, value: &T) -> StdResult<(), Self::Error>
  where
    T: Serialize,
  {
    let env = unsafe { Env::from_raw(self.array.0.env) };
    self.array.set_element(
      self.current_index as _,
      JsUnknown(value.serialize(Ser::new(&env))?),
    )?;
    self.current_index += 1;
    Ok(())
  }

  fn end(self) -> Result<Self::Ok> {
    Ok(self.array.0)
  }
}

pub struct MapSerializer {
  key: JsString,
  obj: JsObject,
}

#[doc(hidden)]
impl ser::SerializeMap for MapSerializer {
  type Ok = Value;
  type Error = Error;

  fn serialize_key<T: ?Sized>(&mut self, key: &T) -> StdResult<(), Self::Error>
  where
    T: Serialize,
  {
    let env = unsafe { Env::from_raw(self.obj.0.env) };
    self.key = JsString(key.serialize(Ser::new(&env))?);
    Ok(())
  }

  fn serialize_value<T: ?Sized>(&mut self, value: &T) -> StdResult<(), Self::Error>
  where
    T: Serialize,
  {
    let env = unsafe { Env::from_raw(self.obj.0.env) };
    self.obj.set_property(
      JsString(Value {
        env: self.key.0.env,
        value: self.key.0.value,
        value_type: ValueType::String,
      }),
      JsUnknown(value.serialize(Ser::new(&env))?),
    )?;
    Ok(())
  }

  fn serialize_entry<K: ?Sized, V: ?Sized>(
    &mut self,
    key: &K,
    value: &V,
  ) -> StdResult<(), Self::Error>
  where
    K: Serialize,
    V: Serialize,
  {
    let env = unsafe { Env::from_raw(self.obj.0.env) };
    self.obj.set_property(
      JsString(key.serialize(Ser::new(&env))?),
      JsUnknown(value.serialize(Ser::new(&env))?),
    )?;
    Ok(())
  }

  fn end(self) -> Result<Self::Ok> {
    Ok(self.obj.0)
  }
}

pub struct StructSerializer {
  obj: JsObject,
}

#[doc(hidden)]
impl ser::SerializeStruct for StructSerializer {
  type Ok = Value;
  type Error = Error;

  fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> StdResult<(), Error>
  where
    T: Serialize,
  {
    let env = unsafe { Env::from_raw(self.obj.0.env) };
    self
      .obj
      .set_named_property(key, JsUnknown(value.serialize(Ser::new(&env))?))?;
    Ok(())
  }

  fn end(self) -> Result<Self::Ok> {
    Ok(self.obj.0)
  }
}

#[doc(hidden)]
impl ser::SerializeStructVariant for StructSerializer {
  type Ok = Value;
  type Error = Error;

  fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> StdResult<(), Error>
  where
    T: Serialize,
  {
    let env = unsafe { Env::from_raw(self.obj.0.env) };
    self
      .obj
      .set_named_property(key, JsUnknown(value.serialize(Ser::new(&env))?))?;
    Ok(())
  }
More examples
Hide additional examples
src/bindgen_runtime/js_values/task.rs (line 79)
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  unsafe fn from_napi_value(env: sys::napi_env, napi_val: sys::napi_value) -> crate::Result<Self> {
    let mut signal = unsafe { JsObject::from_raw_unchecked(env, napi_val) };
    let async_work_inner: Rc<AtomicPtr<sys::napi_async_work__>> =
      Rc::new(AtomicPtr::new(ptr::null_mut()));
    let raw_promise: Rc<AtomicPtr<sys::napi_deferred__>> = Rc::new(AtomicPtr::new(ptr::null_mut()));
    let task_status = Rc::new(AtomicU8::new(0));
    let abort_controller = AbortSignal {
      raw_work: async_work_inner.clone(),
      raw_deferred: raw_promise.clone(),
      status: task_status.clone(),
    };
    let js_env = unsafe { Env::from_raw(env) };
    check_status!(unsafe {
      sys::napi_wrap(
        env,
        signal.0.value,
        Box::into_raw(Box::new(abort_controller)) as *mut _,
        Some(async_task_abort_controller_finalize),
        ptr::null_mut(),
        ptr::null_mut(),
      )
    })?;
    signal.set_named_property("onabort", js_env.create_function("onabort", on_abort)?)?;
    Ok(AbortSignal {
      raw_work: async_work_inner,
      raw_deferred: raw_promise,
      status: task_status,
    })
  }
Examples found in repository?
src/env.rs (line 1034)
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  pub fn get_napi_version(&self) -> Result<u32> {
    let global = self.get_global()?;
    let process: JsObject = global.get_named_property("process")?;
    let versions: JsObject = process.get_named_property("versions")?;
    let napi_version: JsString = versions.get_named_property("napi")?;
    napi_version
      .into_utf8()?
      .as_str()?
      .parse()
      .map_err(|e| Error::new(Status::InvalidArg, format!("{}", e)))
  }
Examples found in repository?
src/js_values/de.rs (line 117)
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  fn deserialize_enum<V>(
    self,
    _name: &'static str,
    _variants: &'static [&'static str],
    visitor: V,
  ) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    let js_value_type = type_of!(self.0.env, self.0.value)?;
    match js_value_type {
      ValueType::String => visitor.visit_enum(JsEnumAccess::new(
        unsafe { JsString::from_raw_unchecked(self.0.env, self.0.value) }
          .into_utf8()?
          .into_owned()?,
        None,
      )),
      ValueType::Object => {
        let js_object = unsafe { JsObject::from_raw_unchecked(self.0.env, self.0.value) };
        let properties = js_object.get_property_names()?;
        let property_len = properties.get_array_length_unchecked()?;
        if property_len != 1 {
          Err(Error::new(
            Status::InvalidArg,
            format!(
              "object key length: {}, can not deserialize to Enum",
              property_len
            ),
          ))
        } else {
          let key = properties.get_element::<JsString>(0)?;
          let value: JsUnknown = js_object.get_property(key)?;
          visitor.visit_enum(JsEnumAccess::new(
            key.into_utf8()?.into_owned()?,
            Some(&value.0),
          ))
        }
      }
      _ => Err(Error::new(
        Status::InvalidArg,
        format!(
          "{:?} type could not deserialize to Enum type",
          js_value_type
        ),
      )),
    }
  }

  fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    visitor.visit_unit()
  }

  forward_to_deserialize_any! {
     <V: Visitor<'x>>
      bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
      unit unit_struct seq tuple tuple_struct map struct identifier
      newtype_struct
  }
}

#[doc(hidden)]
pub(crate) struct JsEnumAccess<'env> {
  variant: String,
  value: Option<&'env Value>,
}

#[doc(hidden)]
impl<'env> JsEnumAccess<'env> {
  fn new(variant: String, value: Option<&'env Value>) -> Self {
    Self { variant, value }
  }
}

#[doc(hidden)]
impl<'de, 'env> EnumAccess<'de> for JsEnumAccess<'env> {
  type Error = Error;
  type Variant = JsVariantAccess<'env>;

  fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant)>
  where
    V: DeserializeSeed<'de>,
  {
    use serde::de::IntoDeserializer;
    let variant = self.variant.into_deserializer();
    let variant_access = JsVariantAccess { value: self.value };
    seed.deserialize(variant).map(|v| (v, variant_access))
  }
}

#[doc(hidden)]
pub(crate) struct JsVariantAccess<'env> {
  value: Option<&'env Value>,
}

#[doc(hidden)]
impl<'de, 'env> VariantAccess<'de> for JsVariantAccess<'env> {
  type Error = Error;
  fn unit_variant(self) -> Result<()> {
    match self.value {
      Some(val) => {
        let mut deserializer = De(val);
        serde::de::Deserialize::deserialize(&mut deserializer)
      }
      None => Ok(()),
    }
  }

  fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value>
  where
    T: DeserializeSeed<'de>,
  {
    match self.value {
      Some(val) => {
        let mut deserializer = De(val);
        seed.deserialize(&mut deserializer)
      }
      None => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"newtype variant",
      )),
    }
  }

  fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'de>,
  {
    match self.value {
      Some(js_value) => {
        let js_object = unsafe { JsObject::from_raw(js_value.env, js_value.value)? };
        if js_object.is_array()? {
          let mut deserializer =
            JsArrayAccess::new(&js_object, js_object.get_array_length_unchecked()?);
          visitor.visit_seq(&mut deserializer)
        } else {
          Err(serde::de::Error::invalid_type(
            Unexpected::Other("JsValue"),
            &"tuple variant",
          ))
        }
      }
      None => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"tuple variant",
      )),
    }
  }

  fn struct_variant<V>(self, _fields: &'static [&'static str], visitor: V) -> Result<V::Value>
  where
    V: Visitor<'de>,
  {
    match self.value {
      Some(js_value) => {
        if let Ok(val) = unsafe { JsObject::from_raw(js_value.env, js_value.value) } {
          let mut deserializer = JsObjectAccess::new(&val)?;
          visitor.visit_map(&mut deserializer)
        } else {
          Err(serde::de::Error::invalid_type(
            Unexpected::Other("JsValue"),
            &"struct variant",
          ))
        }
      }
      _ => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"struct variant",
      )),
    }
  }
}

#[doc(hidden)]
struct JsArrayAccess<'env> {
  input: &'env JsObject,
  idx: u32,
  len: u32,
}

#[doc(hidden)]
impl<'env> JsArrayAccess<'env> {
  fn new(input: &'env JsObject, len: u32) -> Self {
    Self { input, idx: 0, len }
  }
}

#[doc(hidden)]
impl<'de, 'env> SeqAccess<'de> for JsArrayAccess<'env> {
  type Error = Error;

  fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>>
  where
    T: DeserializeSeed<'de>,
  {
    if self.idx >= self.len {
      return Ok(None);
    }
    let v = self.input.get_element::<JsUnknown>(self.idx)?;
    self.idx += 1;

    let mut de = De(&v.0);
    seed.deserialize(&mut de).map(Some)
  }
}

#[doc(hidden)]
pub(crate) struct JsObjectAccess<'env> {
  value: &'env JsObject,
  properties: JsObject,
  idx: u32,
  property_len: u32,
}

#[doc(hidden)]
impl<'env> JsObjectAccess<'env> {
  fn new(value: &'env JsObject) -> Result<Self> {
    let properties = value.get_property_names()?;
    let property_len = properties.get_array_length_unchecked()?;
    Ok(Self {
      value,
      properties,
      idx: 0,
      property_len,
    })
  }

https://nodejs.org/api/n-api.html#n_api_napi_get_all_property_names return Array of property names

This returns the equivalent of Object.getPrototypeOf (which is not the same as the function’s prototype property).

Examples found in repository?
src/js_values/ser.rs (lines 304-307)
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  fn serialize_element<T: ?Sized>(&mut self, value: &T) -> StdResult<(), Self::Error>
  where
    T: Serialize,
  {
    let env = unsafe { Env::from_raw(self.array.0.env) };
    self.array.set_element(
      self.current_index as _,
      JsUnknown(value.serialize(Ser::new(&env))?),
    )?;
    self.current_index += 1;
    Ok(())
  }

  fn end(self) -> Result<Self::Ok> {
    Ok(self.array.0)
  }
}

#[doc(hidden)]
impl ser::SerializeTuple for SeqSerializer {
  type Ok = Value;
  type Error = Error;

  fn serialize_element<T: ?Sized>(&mut self, value: &T) -> StdResult<(), Self::Error>
  where
    T: Serialize,
  {
    let env = unsafe { Env::from_raw(self.array.0.env) };
    self.array.set_element(
      self.current_index as _,
      JsUnknown(value.serialize(Ser::new(&env))?),
    )?;
    self.current_index += 1;
    Ok(())
  }

  fn end(self) -> StdResult<Self::Ok, Self::Error> {
    Ok(self.array.0)
  }
}

#[doc(hidden)]
impl ser::SerializeTupleStruct for SeqSerializer {
  type Ok = Value;
  type Error = Error;

  fn serialize_field<T: ?Sized>(&mut self, value: &T) -> StdResult<(), Self::Error>
  where
    T: Serialize,
  {
    let env = unsafe { Env::from_raw(self.array.0.env) };
    self.array.set_element(
      self.current_index as _,
      JsUnknown(value.serialize(Ser::new(&env))?),
    )?;
    self.current_index += 1;
    Ok(())
  }

  fn end(self) -> StdResult<Self::Ok, Self::Error> {
    Ok(self.array.0)
  }
}

#[doc(hidden)]
impl ser::SerializeTupleVariant for SeqSerializer {
  type Ok = Value;
  type Error = Error;

  fn serialize_field<T: ?Sized>(&mut self, value: &T) -> StdResult<(), Self::Error>
  where
    T: Serialize,
  {
    let env = unsafe { Env::from_raw(self.array.0.env) };
    self.array.set_element(
      self.current_index as _,
      JsUnknown(value.serialize(Ser::new(&env))?),
    )?;
    self.current_index += 1;
    Ok(())
  }
Examples found in repository?
src/js_values/de.rs (line 128)
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  fn deserialize_enum<V>(
    self,
    _name: &'static str,
    _variants: &'static [&'static str],
    visitor: V,
  ) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    let js_value_type = type_of!(self.0.env, self.0.value)?;
    match js_value_type {
      ValueType::String => visitor.visit_enum(JsEnumAccess::new(
        unsafe { JsString::from_raw_unchecked(self.0.env, self.0.value) }
          .into_utf8()?
          .into_owned()?,
        None,
      )),
      ValueType::Object => {
        let js_object = unsafe { JsObject::from_raw_unchecked(self.0.env, self.0.value) };
        let properties = js_object.get_property_names()?;
        let property_len = properties.get_array_length_unchecked()?;
        if property_len != 1 {
          Err(Error::new(
            Status::InvalidArg,
            format!(
              "object key length: {}, can not deserialize to Enum",
              property_len
            ),
          ))
        } else {
          let key = properties.get_element::<JsString>(0)?;
          let value: JsUnknown = js_object.get_property(key)?;
          visitor.visit_enum(JsEnumAccess::new(
            key.into_utf8()?.into_owned()?,
            Some(&value.0),
          ))
        }
      }
      _ => Err(Error::new(
        Status::InvalidArg,
        format!(
          "{:?} type could not deserialize to Enum type",
          js_value_type
        ),
      )),
    }
  }

  fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    visitor.visit_unit()
  }

  forward_to_deserialize_any! {
     <V: Visitor<'x>>
      bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
      unit unit_struct seq tuple tuple_struct map struct identifier
      newtype_struct
  }
}

#[doc(hidden)]
pub(crate) struct JsEnumAccess<'env> {
  variant: String,
  value: Option<&'env Value>,
}

#[doc(hidden)]
impl<'env> JsEnumAccess<'env> {
  fn new(variant: String, value: Option<&'env Value>) -> Self {
    Self { variant, value }
  }
}

#[doc(hidden)]
impl<'de, 'env> EnumAccess<'de> for JsEnumAccess<'env> {
  type Error = Error;
  type Variant = JsVariantAccess<'env>;

  fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant)>
  where
    V: DeserializeSeed<'de>,
  {
    use serde::de::IntoDeserializer;
    let variant = self.variant.into_deserializer();
    let variant_access = JsVariantAccess { value: self.value };
    seed.deserialize(variant).map(|v| (v, variant_access))
  }
}

#[doc(hidden)]
pub(crate) struct JsVariantAccess<'env> {
  value: Option<&'env Value>,
}

#[doc(hidden)]
impl<'de, 'env> VariantAccess<'de> for JsVariantAccess<'env> {
  type Error = Error;
  fn unit_variant(self) -> Result<()> {
    match self.value {
      Some(val) => {
        let mut deserializer = De(val);
        serde::de::Deserialize::deserialize(&mut deserializer)
      }
      None => Ok(()),
    }
  }

  fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value>
  where
    T: DeserializeSeed<'de>,
  {
    match self.value {
      Some(val) => {
        let mut deserializer = De(val);
        seed.deserialize(&mut deserializer)
      }
      None => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"newtype variant",
      )),
    }
  }

  fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'de>,
  {
    match self.value {
      Some(js_value) => {
        let js_object = unsafe { JsObject::from_raw(js_value.env, js_value.value)? };
        if js_object.is_array()? {
          let mut deserializer =
            JsArrayAccess::new(&js_object, js_object.get_array_length_unchecked()?);
          visitor.visit_seq(&mut deserializer)
        } else {
          Err(serde::de::Error::invalid_type(
            Unexpected::Other("JsValue"),
            &"tuple variant",
          ))
        }
      }
      None => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"tuple variant",
      )),
    }
  }

  fn struct_variant<V>(self, _fields: &'static [&'static str], visitor: V) -> Result<V::Value>
  where
    V: Visitor<'de>,
  {
    match self.value {
      Some(js_value) => {
        if let Ok(val) = unsafe { JsObject::from_raw(js_value.env, js_value.value) } {
          let mut deserializer = JsObjectAccess::new(&val)?;
          visitor.visit_map(&mut deserializer)
        } else {
          Err(serde::de::Error::invalid_type(
            Unexpected::Other("JsValue"),
            &"struct variant",
          ))
        }
      }
      _ => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"struct variant",
      )),
    }
  }
}

#[doc(hidden)]
struct JsArrayAccess<'env> {
  input: &'env JsObject,
  idx: u32,
  len: u32,
}

#[doc(hidden)]
impl<'env> JsArrayAccess<'env> {
  fn new(input: &'env JsObject, len: u32) -> Self {
    Self { input, idx: 0, len }
  }
}

#[doc(hidden)]
impl<'de, 'env> SeqAccess<'de> for JsArrayAccess<'env> {
  type Error = Error;

  fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>>
  where
    T: DeserializeSeed<'de>,
  {
    if self.idx >= self.len {
      return Ok(None);
    }
    let v = self.input.get_element::<JsUnknown>(self.idx)?;
    self.idx += 1;

    let mut de = De(&v.0);
    seed.deserialize(&mut de).map(Some)
  }
}

#[doc(hidden)]
pub(crate) struct JsObjectAccess<'env> {
  value: &'env JsObject,
  properties: JsObject,
  idx: u32,
  property_len: u32,
}

#[doc(hidden)]
impl<'env> JsObjectAccess<'env> {
  fn new(value: &'env JsObject) -> Result<Self> {
    let properties = value.get_property_names()?;
    let property_len = properties.get_array_length_unchecked()?;
    Ok(Self {
      value,
      properties,
      idx: 0,
      property_len,
    })
  }
}

#[doc(hidden)]
impl<'de, 'env> MapAccess<'de> for JsObjectAccess<'env> {
  type Error = Error;

  fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>>
  where
    K: DeserializeSeed<'de>,
  {
    if self.idx >= self.property_len {
      return Ok(None);
    }

    let prop_name = self.properties.get_element::<JsUnknown>(self.idx)?;

    let mut de = De(&prop_name.0);
    seed.deserialize(&mut de).map(Some)
  }

  fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value>
  where
    V: DeserializeSeed<'de>,
  {
    if self.idx >= self.property_len {
      return Err(Error::new(
        Status::InvalidArg,
        format!("Index:{} out of range: {}", self.property_len, self.idx),
      ));
    }
    let prop_name = self.properties.get_element::<JsString>(self.idx)?;
    let value: JsUnknown = self.value.get_property(prop_name)?;

    self.idx += 1;
    let mut de = De(&value.0);
    let res = seed.deserialize(&mut de)?;
    Ok(res)
  }

This method allows the efficient definition of multiple properties on a given object.

Perform is_array check before get the length if Object is not array, ArrayExpected error returned

use this API if you can ensure this Object is Array

Examples found in repository?
src/js_values/de.rs (line 47)
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  fn deserialize_any<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    let js_value_type = type_of!(self.0.env, self.0.value)?;
    match js_value_type {
      ValueType::Null | ValueType::Undefined => visitor.visit_unit(),
      ValueType::Boolean => {
        let js_boolean = unsafe { JsBoolean::from_raw_unchecked(self.0.env, self.0.value) };
        visitor.visit_bool(js_boolean.get_value()?)
      }
      ValueType::Number => {
        let js_number: f64 =
          unsafe { JsNumber::from_raw_unchecked(self.0.env, self.0.value).try_into()? };
        if (js_number.trunc() - js_number).abs() < f64::EPSILON {
          visitor.visit_i64(js_number as i64)
        } else {
          visitor.visit_f64(js_number)
        }
      }
      ValueType::String => {
        let js_string = unsafe { JsString::from_raw_unchecked(self.0.env, self.0.value) };
        visitor.visit_str(js_string.into_utf8()?.as_str()?)
      }
      ValueType::Object => {
        let js_object = unsafe { JsObject::from_raw_unchecked(self.0.env, self.0.value) };
        if js_object.is_array()? {
          let mut deserializer =
            JsArrayAccess::new(&js_object, js_object.get_array_length_unchecked()?);
          visitor.visit_seq(&mut deserializer)
        } else if js_object.is_buffer()? {
          visitor.visit_bytes(&JsBufferValue::from_raw(self.0.env, self.0.value)?)
        } else {
          let mut deserializer = JsObjectAccess::new(&js_object)?;
          visitor.visit_map(&mut deserializer)
        }
      }
      #[cfg(feature = "napi6")]
      ValueType::BigInt => {
        let mut js_bigint = unsafe { JsBigInt::from_raw(self.0.env, self.0.value)? };
        let (signed, v, _loss) = js_bigint.get_u128()?;
        if signed {
          visitor.visit_i128(-(v as i128))
        } else {
          visitor.visit_u128(v)
        }
      }
      ValueType::External | ValueType::Function | ValueType::Symbol => Err(Error::new(
        Status::InvalidArg,
        format!("typeof {:?} value could not be deserialized", js_value_type),
      )),
      ValueType::Unknown => unreachable!(),
    }
  }

  fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    visitor.visit_bytes(&JsBufferValue::from_raw(self.0.env, self.0.value)?)
  }

  fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    visitor.visit_bytes(&JsBufferValue::from_raw(self.0.env, self.0.value)?)
  }

  fn deserialize_option<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    match type_of!(self.0.env, self.0.value)? {
      ValueType::Undefined | ValueType::Null => visitor.visit_none(),
      _ => visitor.visit_some(self),
    }
  }

  fn deserialize_enum<V>(
    self,
    _name: &'static str,
    _variants: &'static [&'static str],
    visitor: V,
  ) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    let js_value_type = type_of!(self.0.env, self.0.value)?;
    match js_value_type {
      ValueType::String => visitor.visit_enum(JsEnumAccess::new(
        unsafe { JsString::from_raw_unchecked(self.0.env, self.0.value) }
          .into_utf8()?
          .into_owned()?,
        None,
      )),
      ValueType::Object => {
        let js_object = unsafe { JsObject::from_raw_unchecked(self.0.env, self.0.value) };
        let properties = js_object.get_property_names()?;
        let property_len = properties.get_array_length_unchecked()?;
        if property_len != 1 {
          Err(Error::new(
            Status::InvalidArg,
            format!(
              "object key length: {}, can not deserialize to Enum",
              property_len
            ),
          ))
        } else {
          let key = properties.get_element::<JsString>(0)?;
          let value: JsUnknown = js_object.get_property(key)?;
          visitor.visit_enum(JsEnumAccess::new(
            key.into_utf8()?.into_owned()?,
            Some(&value.0),
          ))
        }
      }
      _ => Err(Error::new(
        Status::InvalidArg,
        format!(
          "{:?} type could not deserialize to Enum type",
          js_value_type
        ),
      )),
    }
  }

  fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'x>,
  {
    visitor.visit_unit()
  }

  forward_to_deserialize_any! {
     <V: Visitor<'x>>
      bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
      unit unit_struct seq tuple tuple_struct map struct identifier
      newtype_struct
  }
}

#[doc(hidden)]
pub(crate) struct JsEnumAccess<'env> {
  variant: String,
  value: Option<&'env Value>,
}

#[doc(hidden)]
impl<'env> JsEnumAccess<'env> {
  fn new(variant: String, value: Option<&'env Value>) -> Self {
    Self { variant, value }
  }
}

#[doc(hidden)]
impl<'de, 'env> EnumAccess<'de> for JsEnumAccess<'env> {
  type Error = Error;
  type Variant = JsVariantAccess<'env>;

  fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant)>
  where
    V: DeserializeSeed<'de>,
  {
    use serde::de::IntoDeserializer;
    let variant = self.variant.into_deserializer();
    let variant_access = JsVariantAccess { value: self.value };
    seed.deserialize(variant).map(|v| (v, variant_access))
  }
}

#[doc(hidden)]
pub(crate) struct JsVariantAccess<'env> {
  value: Option<&'env Value>,
}

#[doc(hidden)]
impl<'de, 'env> VariantAccess<'de> for JsVariantAccess<'env> {
  type Error = Error;
  fn unit_variant(self) -> Result<()> {
    match self.value {
      Some(val) => {
        let mut deserializer = De(val);
        serde::de::Deserialize::deserialize(&mut deserializer)
      }
      None => Ok(()),
    }
  }

  fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value>
  where
    T: DeserializeSeed<'de>,
  {
    match self.value {
      Some(val) => {
        let mut deserializer = De(val);
        seed.deserialize(&mut deserializer)
      }
      None => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"newtype variant",
      )),
    }
  }

  fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value>
  where
    V: Visitor<'de>,
  {
    match self.value {
      Some(js_value) => {
        let js_object = unsafe { JsObject::from_raw(js_value.env, js_value.value)? };
        if js_object.is_array()? {
          let mut deserializer =
            JsArrayAccess::new(&js_object, js_object.get_array_length_unchecked()?);
          visitor.visit_seq(&mut deserializer)
        } else {
          Err(serde::de::Error::invalid_type(
            Unexpected::Other("JsValue"),
            &"tuple variant",
          ))
        }
      }
      None => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"tuple variant",
      )),
    }
  }

  fn struct_variant<V>(self, _fields: &'static [&'static str], visitor: V) -> Result<V::Value>
  where
    V: Visitor<'de>,
  {
    match self.value {
      Some(js_value) => {
        if let Ok(val) = unsafe { JsObject::from_raw(js_value.env, js_value.value) } {
          let mut deserializer = JsObjectAccess::new(&val)?;
          visitor.visit_map(&mut deserializer)
        } else {
          Err(serde::de::Error::invalid_type(
            Unexpected::Other("JsValue"),
            &"struct variant",
          ))
        }
      }
      _ => Err(serde::de::Error::invalid_type(
        Unexpected::UnitVariant,
        &"struct variant",
      )),
    }
  }
}

#[doc(hidden)]
struct JsArrayAccess<'env> {
  input: &'env JsObject,
  idx: u32,
  len: u32,
}

#[doc(hidden)]
impl<'env> JsArrayAccess<'env> {
  fn new(input: &'env JsObject, len: u32) -> Self {
    Self { input, idx: 0, len }
  }
}

#[doc(hidden)]
impl<'de, 'env> SeqAccess<'de> for JsArrayAccess<'env> {
  type Error = Error;

  fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>>
  where
    T: DeserializeSeed<'de>,
  {
    if self.idx >= self.len {
      return Ok(None);
    }
    let v = self.input.get_element::<JsUnknown>(self.idx)?;
    self.idx += 1;

    let mut de = De(&v.0);
    seed.deserialize(&mut de).map(Some)
  }
}

#[doc(hidden)]
pub(crate) struct JsObjectAccess<'env> {
  value: &'env JsObject,
  properties: JsObject,
  idx: u32,
  property_len: u32,
}

#[doc(hidden)]
impl<'env> JsObjectAccess<'env> {
  fn new(value: &'env JsObject) -> Result<Self> {
    let properties = value.get_property_names()?;
    let property_len = properties.get_array_length_unchecked()?;
    Ok(Self {
      value,
      properties,
      idx: 0,
      property_len,
    })
  }

Trait Implementations§

The type returned in the event of a conversion error.
Performs the conversion.

Auto Trait Implementations§

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Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.