use std::{collections::BTreeMap, fmt::Display};
use serde::ser;
use crate::value::Value;
#[cfg(test)]
mod test;
#[cfg(test)]
pub fn to_value<T>(value: T) -> Result<Value, Error>
where
T: ser::Serialize,
{
value.serialize(Serializer)
}
pub(crate) struct Serializer;
#[derive(Debug)]
pub struct Error;
impl serde::ser::Error for Error {
fn custom<T: Display>(msg: T) -> Self {
todo!("{msg}")
}
}
impl std::error::Error for Error {}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
"seralize error".fmt(f)
}
}
impl serde::ser::Serializer for Serializer {
type Ok = Value;
type Error = Error;
type SerializeSeq = SerializeSeq;
type SerializeTuple = SerializeTuple;
type SerializeTupleStruct = SerializeTupleStruct;
type SerializeTupleVariant = SerializeTupleVariant;
type SerializeMap = SerializeMap;
type SerializeStruct = SerializeStruct;
type SerializeStructVariant = SerializeStructVariant;
fn serialize_bool(self, v: bool) -> Result<Self::Ok, Self::Error> {
Ok(Value::Boolean(v))
}
fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
Ok(Value::String(v.to_owned()))
}
fn serialize_some<T>(self, value: &T) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + serde::Serialize,
{
Ok(Value::Option(Box::new(Some(value.serialize(Serializer)?))))
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
Ok(Value::Unit)
}
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
self.serialize_unit()
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
) -> Result<Self::Ok, Self::Error> {
Ok(Value::EnumUnit(variant))
}
fn serialize_newtype_struct<T>(
self,
_name: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: serde::Serialize + ?Sized,
{
Ok(Value::NewtypeStruct(vec![value.serialize(self)?]))
}
fn serialize_newtype_variant<T>(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: serde::Serialize + ?Sized,
{
Ok(Value::Enum(variant, vec![value.serialize(self)?]))
}
fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
match len {
Some(len) => Ok(SerializeSeq::with_capacity(len)),
None => Ok(SerializeSeq::new()),
}
}
fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Self::Error> {
Ok(SerializeTuple::with_capacity(len))
}
fn serialize_tuple_struct(
self,
_name: &'static str,
len: usize,
) -> Result<Self::SerializeTupleStruct, Self::Error> {
Ok(SerializeTupleStruct::with_capacity(len))
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeTupleVariant, Self::Error> {
Ok(SerializeTupleVariant::with_capacity(variant, len))
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
Ok(SerializeMap::new())
}
fn serialize_struct(
self,
_name: &'static str,
_len: usize,
) -> Result<Self::SerializeStruct, Self::Error> {
Ok(SerializeStruct(BTreeMap::default()))
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
_len: usize,
) -> Result<Self::SerializeStructVariant, Self::Error> {
Ok(SerializeStructVariant::new(variant))
}
fn serialize_i8(self, v: i8) -> Result<Self::Ok, Self::Error> {
Ok(Value::Int8(v))
}
fn serialize_i16(self, v: i16) -> Result<Self::Ok, Self::Error> {
Ok(Value::Int16(v))
}
fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error> {
Ok(Value::Int32(v))
}
fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
Ok(Value::Int64(v))
}
fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error> {
Ok(Value::Uint8(v))
}
fn serialize_u16(self, v: u16) -> Result<Self::Ok, Self::Error> {
Ok(Value::Uint16(v))
}
fn serialize_u32(self, v: u32) -> Result<Self::Ok, Self::Error> {
Ok(Value::Uint32(v))
}
fn serialize_u64(self, v: u64) -> Result<Self::Ok, Self::Error> {
Ok(Value::Uint64(v))
}
fn serialize_f32(self, v: f32) -> Result<Self::Ok, Self::Error> {
Ok(Value::Float32(v.into()))
}
fn serialize_f64(self, v: f64) -> Result<Self::Ok, Self::Error> {
Ok(Value::Float64(v.into()))
}
fn serialize_char(self, v: char) -> Result<Self::Ok, Self::Error> {
Ok(Value::Char(v))
}
fn serialize_bytes(self, v: &[u8]) -> Result<Self::Ok, Self::Error> {
Ok(Value::Bytes(v.to_vec()))
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
Ok(Value::Option(Box::new(None)))
}
fn is_human_readable(&self) -> bool {
false
}
}
#[derive(Default)]
pub(crate) struct SerializeSeq(Vec<Value>);
impl SerializeSeq {
fn new() -> Self {
Self::default()
}
fn with_capacity(capacity: usize) -> Self {
Self(Vec::with_capacity(capacity))
}
}
impl serde::ser::SerializeSeq for SerializeSeq {
type Error = Error;
type Ok = Value;
fn serialize_element<T>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: serde::Serialize + ?Sized,
{
self.0.push(value.serialize(Serializer)?);
Ok(())
}
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(Value::Array(self.0))
}
}
#[derive(Default)]
pub struct SerializeTuple(Vec<Value>);
impl SerializeTuple {
fn with_capacity(capacity: usize) -> Self {
Self(Vec::with_capacity(capacity))
}
}
impl ser::SerializeTuple for SerializeTuple {
type Error = Error;
type Ok = Value;
fn serialize_element<T>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: serde::Serialize + ?Sized,
{
self.0.push(value.serialize(Serializer)?);
Ok(())
}
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(Value::Tuple(self.0))
}
}
#[derive(Default)]
pub struct SerializeTupleStruct(Vec<Value>);
impl SerializeTupleStruct {
fn with_capacity(capacity: usize) -> Self {
Self(Vec::with_capacity(capacity))
}
}
impl ser::SerializeTupleStruct for SerializeTupleStruct {
type Error = Error;
type Ok = Value;
fn serialize_field<T>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: serde::Serialize + ?Sized,
{
self.0.push(value.serialize(Serializer)?);
Ok(())
}
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(Value::TupleStruct(self.0))
}
}
#[derive(Debug, PartialEq, Eq)]
pub(crate) struct SerializeTupleVariant {
variant: &'static str,
map: Vec<Value>,
}
impl SerializeTupleVariant {
fn with_capacity(variant: &'static str, len: usize) -> Self {
Self {
variant,
map: Vec::with_capacity(len),
}
}
}
impl ser::SerializeTupleVariant for SerializeTupleVariant {
type Error = Error;
type Ok = Value;
fn serialize_field<T>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: serde::Serialize + ?Sized,
{
self.map.push(value.serialize(Serializer)?);
Ok(())
}
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(Value::TupleVariant(self.variant, self.map))
}
}
pub(crate) struct SerializeMap {
map: BTreeMap<Value, Value>,
next_key: Option<Value>,
}
impl SerializeMap {
fn new() -> Self {
SerializeMap {
map: BTreeMap::new(),
next_key: None,
}
}
}
impl ser::SerializeMap for SerializeMap {
type Error = Error;
type Ok = Value;
fn serialize_key<T>(&mut self, key: &T) -> Result<(), Self::Error>
where
T: serde::Serialize + ?Sized,
{
self.next_key = Some(key.serialize(Serializer)?);
Ok(())
}
fn serialize_value<T>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: serde::Serialize + ?Sized,
{
let key = self.next_key.take().ok_or(Error)?;
self.map.insert(key, value.serialize(Serializer)?);
Ok(())
}
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(Value::Map(self.map))
}
}
#[derive(Debug, PartialEq, Eq)]
pub(crate) struct SerializeStruct(BTreeMap<Value, Value>);
impl ser::SerializeStruct for SerializeStruct {
type Error = Error;
type Ok = Value;
fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<(), Self::Error>
where
T: serde::Serialize + ?Sized,
{
self.0.insert(
Value::StructKey(key.to_string()),
value.serialize(Serializer)?,
);
Ok(())
}
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(Value::Struct(self.0))
}
}
#[derive(Debug, PartialEq, Eq)]
pub(crate) struct SerializeStructVariant {
variant: &'static str,
map: BTreeMap<Value, Value>,
}
impl SerializeStructVariant {
fn new(variant: &'static str) -> Self {
Self {
variant,
map: BTreeMap::new(),
}
}
}
impl ser::SerializeStructVariant for SerializeStructVariant {
type Error = Error;
type Ok = Value;
fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<(), Self::Error>
where
T: serde::Serialize + ?Sized,
{
self.map.insert(
Value::StructVariantKey(key.to_string()),
value.serialize(Serializer)?,
);
Ok(())
}
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(Value::StructVariant(self.variant, self.map))
}
}