use serde::{ser, Serialize};
use crate::{Error, RESPType, Result};
use serde::ser::SerializeSeq;
use std::io::Write;
use std::result;
pub struct Serializer<W: Write> {
writer: W,
}
pub fn to_string<T>(value: &T) -> Result<String>
where
T: Serialize,
{
let mut buf: Vec<u8> = Vec::new();
to_writer(value, &mut buf)?;
Ok(String::from_utf8(buf)?)
}
pub fn to_writer<T, W>(value: &T, writer: &mut W) -> Result<()>
where
T: Serialize,
W: Write,
{
let mut serializer = Serializer { writer };
value.serialize(&mut serializer)?;
Ok(())
}
impl<'a, W> ser::Serializer for &'a mut Serializer<W>
where
W: Write,
{
type Ok = ();
type Error = Error;
type SerializeSeq = Self;
type SerializeTuple = Self;
type SerializeTupleStruct = Self;
type SerializeTupleVariant = Self;
type SerializeMap = Self;
type SerializeStruct = Self;
type SerializeStructVariant = Self;
fn serialize_bool(self, _v: bool) -> Result<()> {
unimplemented!()
}
fn serialize_i8(self, _v: i8) -> Result<()> {
unimplemented!()
}
fn serialize_i16(self, _v: i16) -> Result<()> {
unimplemented!()
}
fn serialize_i32(self, _v: i32) -> Result<()> {
unimplemented!()
}
fn serialize_i64(self, v: i64) -> Result<()> {
self.writer.write_all(b":")?;
itoa::write(&mut self.writer, v)?;
self.writer.write_all(b"\r\n")?;
Ok(())
}
fn serialize_u8(self, _v: u8) -> Result<()> {
unimplemented!()
}
fn serialize_u16(self, _v: u16) -> Result<()> {
unimplemented!()
}
fn serialize_u32(self, _v: u32) -> Result<()> {
unimplemented!()
}
fn serialize_u64(self, _v: u64) -> Result<()> {
unimplemented!()
}
fn serialize_f32(self, _v: f32) -> Result<()> {
unimplemented!()
}
fn serialize_f64(self, _v: f64) -> Result<()> {
unimplemented!()
}
fn serialize_char(self, v: char) -> Result<()> {
self.serialize_str(&v.to_string())
}
fn serialize_str(self, v: &str) -> Result<()> {
self.writer.write_all(v.as_bytes())?;
self.writer.write_all(b"\r\n")?;
Ok(())
}
fn serialize_bytes(self, v: &[u8]) -> Result<()> {
self.writer.write_all(b"$")?;
itoa::write(&mut self.writer, v.len() as u64)?;
self.writer.write_all(b"\r\n")?;
self.writer.write_all(v)?;
self.writer.write_all(b"\r\n")?;
Ok(())
}
fn serialize_none(self) -> Result<()> {
self.writer.write_all(b"$-1\r\n")?;
Ok(())
}
fn serialize_some<T>(self, _value: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
unimplemented!()
}
fn serialize_unit(self) -> Result<()> {
self.writer.write_all(b"*-1\r\n")?;
Ok(())
}
fn serialize_unit_struct(self, _name: &'static str) -> Result<()> {
unimplemented!()
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
) -> Result<()> {
unimplemented!()
}
fn serialize_newtype_struct<T>(self, _name: &'static str, _value: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
unimplemented!()
}
fn serialize_newtype_variant<T>(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_value: &T,
) -> Result<()>
where
T: ?Sized + Serialize,
{
unimplemented!()
}
fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq> {
match len {
None => unimplemented!(),
Some(len) => {
self.writer.write_all(b"*")?;
itoa::write(&mut self.writer, len as u64)?;
self.writer.write_all(b"\r\n")?;
}
}
Ok(self)
}
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple> {
unimplemented!()
}
fn serialize_tuple_struct(
self,
_name: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleStruct> {
unimplemented!()
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleVariant> {
unimplemented!()
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap> {
unimplemented!()
}
fn serialize_struct(self, _name: &'static str, _len: usize) -> Result<Self::SerializeStruct> {
unimplemented!()
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize,
) -> Result<Self::SerializeStructVariant> {
unimplemented!()
}
}
impl<'a, W> ser::SerializeSeq for &'a mut Serializer<W>
where
W: Write,
{
type Ok = ();
type Error = Error;
fn serialize_element<T>(&mut self, value: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
value.serialize(&mut **self)
}
fn end(self) -> Result<()> {
Ok(())
}
}
impl<'a, W> ser::SerializeTuple for &'a mut Serializer<W>
where
W: Write,
{
type Ok = ();
type Error = Error;
fn serialize_element<T>(&mut self, _value: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
unimplemented!()
}
fn end(self) -> Result<()> {
unimplemented!()
}
}
impl<'a, W> ser::SerializeTupleStruct for &'a mut Serializer<W>
where
W: Write,
{
type Ok = ();
type Error = Error;
fn serialize_field<T>(&mut self, _value: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
unimplemented!()
}
fn end(self) -> Result<()> {
unimplemented!()
}
}
impl<'a, W> ser::SerializeTupleVariant for &'a mut Serializer<W>
where
W: Write,
{
type Ok = ();
type Error = Error;
fn serialize_field<T>(&mut self, _value: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
unimplemented!()
}
fn end(self) -> Result<()> {
unimplemented!()
}
}
impl<'a, W> ser::SerializeMap for &'a mut Serializer<W>
where
W: Write,
{
type Ok = ();
type Error = Error;
fn serialize_key<T>(&mut self, _key: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
unimplemented!()
}
fn serialize_value<T>(&mut self, _value: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
unimplemented!()
}
fn end(self) -> Result<()> {
unimplemented!()
}
}
impl<'a, W> ser::SerializeStruct for &'a mut Serializer<W>
where
W: Write,
{
type Ok = ();
type Error = Error;
fn serialize_field<T>(&mut self, _key: &'static str, _value: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
unimplemented!()
}
fn end(self) -> Result<()> {
unimplemented!()
}
}
impl<'a, W> ser::SerializeStructVariant for &'a mut Serializer<W>
where
W: Write,
{
type Ok = ();
type Error = Error;
fn serialize_field<T>(&mut self, _key: &'static str, _value: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
unimplemented!()
}
fn end(self) -> Result<()> {
unimplemented!()
}
}
impl serde::Serialize for RESPType {
fn serialize<S>(
&self,
s: S,
) -> result::Result<<S as serde::Serializer>::Ok, <S as serde::Serializer>::Error>
where
S: serde::Serializer,
{
match self {
RESPType::SimpleString(str) => s.serialize_str(&("+".to_owned() + str)),
RESPType::Error(str) => s.serialize_str(&("-".to_owned() + str)),
RESPType::Integer(i) => s.serialize_i64(*i),
RESPType::BulkString(bulk_str) => match bulk_str {
None => s.serialize_none(),
Some(val) => s.serialize_bytes(val),
},
RESPType::Array(arr) => match arr {
None => s.serialize_unit(),
Some(vals) => {
let mut s = s.serialize_seq(Some(vals.len()))?;
for v in vals {
s.serialize_element(v)?;
}
s.end()
}
},
}
}
}