use std::collections::BTreeMap;
use super::{to_ipld, Error, Ipld};
use cid::Cid;
use encoding::to_vec;
use serde::{self, Serialize};
use std::convert::TryFrom;
impl serde::Serialize for Ipld {
#[inline]
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
match self {
Ipld::Integer(v) => serializer.serialize_i128(*v),
Ipld::Bytes(v) => serializer.serialize_bytes(&v),
Ipld::String(v) => serializer.serialize_str(&v),
Ipld::List(v) => v.serialize(serializer),
Ipld::Map(v) => v.serialize(serializer),
Ipld::Link(cid) => cid.serialize(serializer),
Ipld::Float(v) => serializer.serialize_f64(*v),
Ipld::Bool(v) => serializer.serialize_bool(*v),
Ipld::Null => serializer.serialize_unit(),
}
}
}
pub(super) struct Serializer;
impl serde::Serializer for Serializer {
type Ok = Ipld;
type Error = Error;
type SerializeSeq = SerializeVec;
type SerializeTuple = SerializeVec;
type SerializeTupleStruct = SerializeVec;
type SerializeTupleVariant = SerializeTupleVariant;
type SerializeMap = SerializeMap;
type SerializeStruct = SerializeMap;
type SerializeStructVariant = SerializeStructVariant;
#[inline]
fn serialize_bool(self, ipld: bool) -> Result<Ipld, Error> {
Ok(Ipld::Bool(ipld))
}
#[inline]
fn serialize_i8(self, ipld: i8) -> Result<Ipld, Error> {
self.serialize_i64(i64::from(ipld))
}
#[inline]
fn serialize_i16(self, ipld: i16) -> Result<Ipld, Error> {
self.serialize_i64(i64::from(ipld))
}
#[inline]
fn serialize_i32(self, ipld: i32) -> Result<Ipld, Error> {
self.serialize_i64(i64::from(ipld))
}
#[inline]
fn serialize_i64(self, ipld: i64) -> Result<Ipld, Error> {
self.serialize_i128(i128::from(ipld))
}
fn serialize_i128(self, ipld: i128) -> Result<Ipld, Error> {
Ok(Ipld::Integer(ipld))
}
#[inline]
fn serialize_u8(self, ipld: u8) -> Result<Ipld, Error> {
self.serialize_u64(u64::from(ipld))
}
#[inline]
fn serialize_u16(self, ipld: u16) -> Result<Ipld, Error> {
self.serialize_u64(u64::from(ipld))
}
#[inline]
fn serialize_u32(self, ipld: u32) -> Result<Ipld, Error> {
self.serialize_u64(u64::from(ipld))
}
#[inline]
fn serialize_u64(self, ipld: u64) -> Result<Ipld, Error> {
Ok(Ipld::Integer(ipld.into()))
}
#[inline]
fn serialize_f32(self, ipld: f32) -> Result<Ipld, Error> {
self.serialize_f64(f64::from(ipld))
}
#[inline]
fn serialize_f64(self, ipld: f64) -> Result<Ipld, Error> {
Ok(Ipld::Float(ipld))
}
#[inline]
fn serialize_char(self, ipld: char) -> Result<Ipld, Error> {
let mut s = String::new();
s.push(ipld);
self.serialize_str(&s)
}
#[inline]
fn serialize_str(self, ipld: &str) -> Result<Ipld, Error> {
Ok(Ipld::String(ipld.to_owned()))
}
fn serialize_bytes(self, ipld: &[u8]) -> Result<Ipld, Error> {
Ok(Ipld::Bytes(ipld.to_vec()))
}
#[inline]
fn serialize_unit(self) -> Result<Ipld, Error> {
Ok(Ipld::Null)
}
#[inline]
fn serialize_unit_struct(self, _name: &'static str) -> Result<Ipld, Error> {
self.serialize_unit()
}
#[inline]
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
) -> Result<Ipld, Error> {
self.serialize_str(variant)
}
#[inline]
fn serialize_newtype_struct<T: ?Sized>(
self,
name: &'static str,
ipld: &T,
) -> Result<Ipld, Error>
where
T: Serialize,
{
if name == "\0cbor_tag" {
let bz = to_vec(&ipld)?;
let mut sl = &bz[..];
if bz.len() < 3 {
return Err(Error::Encoding("Invalid tag for Ipld".to_owned()));
}
match sl[0] {
0x40..=0x57 => sl = &sl[2..],
0x58 => sl = &sl[3..],
0x59 => sl = &sl[4..],
0x5a => sl = &sl[6..],
0x5b => sl = &sl[10..],
_ => return Err(Error::Encoding("Invalid cbor tag".to_owned())),
}
return Ok(Ipld::Link(
Cid::try_from(sl).map_err(|e| Error::Encoding(e.to_string()))?,
));
}
ipld.serialize(self)
}
fn serialize_newtype_variant<T: ?Sized>(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
ipld: &T,
) -> Result<Ipld, Error>
where
T: Serialize,
{
let mut values = BTreeMap::new();
values.insert(variant.to_owned(), to_ipld(&ipld)?);
Ok(Ipld::Map(values))
}
#[inline]
fn serialize_none(self) -> Result<Ipld, Error> {
self.serialize_unit()
}
#[inline]
fn serialize_some<T: ?Sized>(self, ipld: &T) -> Result<Ipld, Error>
where
T: Serialize,
{
ipld.serialize(self)
}
fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Error> {
Ok(SerializeVec {
vec: Vec::with_capacity(len.unwrap_or(0)),
})
}
fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Error> {
self.serialize_seq(Some(len))
}
fn serialize_tuple_struct(
self,
_name: &'static str,
len: usize,
) -> Result<Self::SerializeTupleStruct, Error> {
self.serialize_tuple(len)
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeTupleVariant, Error> {
Ok(SerializeTupleVariant {
name: String::from(variant),
vec: Vec::with_capacity(len),
})
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Error> {
Ok(SerializeMap {
map: BTreeMap::new(),
next_key: None,
})
}
fn serialize_struct(
self,
_name: &'static str,
len: usize,
) -> Result<Self::SerializeStruct, Error> {
self.serialize_map(Some(len))
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
_len: usize,
) -> Result<Self::SerializeStructVariant, Error> {
Ok(SerializeStructVariant {
name: String::from(variant),
map: BTreeMap::new(),
})
}
#[inline]
fn is_human_readable(&self) -> bool {
false
}
}
pub struct SerializeVec {
vec: Vec<Ipld>,
}
pub struct SerializeTupleVariant {
name: String,
vec: Vec<Ipld>,
}
pub struct SerializeMap {
map: BTreeMap<String, Ipld>,
next_key: Option<String>,
}
pub struct SerializeStructVariant {
name: String,
map: BTreeMap<String, Ipld>,
}
impl serde::ser::SerializeSeq for SerializeVec {
type Ok = Ipld;
type Error = Error;
fn serialize_element<T: ?Sized>(&mut self, ipld: &T) -> Result<(), Error>
where
T: Serialize,
{
self.vec.push(to_ipld(&ipld)?);
Ok(())
}
fn end(self) -> Result<Ipld, Error> {
Ok(Ipld::List(self.vec))
}
}
impl serde::ser::SerializeTuple for SerializeVec {
type Ok = Ipld;
type Error = Error;
fn serialize_element<T: ?Sized>(&mut self, ipld: &T) -> Result<(), Error>
where
T: Serialize,
{
serde::ser::SerializeSeq::serialize_element(self, ipld)
}
fn end(self) -> Result<Ipld, Error> {
serde::ser::SerializeSeq::end(self)
}
}
impl serde::ser::SerializeTupleStruct for SerializeVec {
type Ok = Ipld;
type Error = Error;
fn serialize_field<T: ?Sized>(&mut self, ipld: &T) -> Result<(), Error>
where
T: Serialize,
{
serde::ser::SerializeSeq::serialize_element(self, ipld)
}
fn end(self) -> Result<Ipld, Error> {
serde::ser::SerializeSeq::end(self)
}
}
impl serde::ser::SerializeTupleVariant for SerializeTupleVariant {
type Ok = Ipld;
type Error = Error;
fn serialize_field<T: ?Sized>(&mut self, ipld: &T) -> Result<(), Error>
where
T: Serialize,
{
self.vec.push(to_ipld(&ipld)?);
Ok(())
}
fn end(self) -> Result<Ipld, Error> {
let mut object = BTreeMap::new();
object.insert(self.name, Ipld::List(self.vec));
Ok(Ipld::Map(object))
}
}
impl serde::ser::SerializeMap for SerializeMap {
type Ok = Ipld;
type Error = Error;
fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Error>
where
T: Serialize,
{
if let Ipld::String(key_s) = to_ipld(&key)? {
self.next_key = Some(key_s);
} else {
return Err(Error::Encoding(
"Map keys must be a string in IPLD".to_owned(),
));
}
Ok(())
}
fn serialize_value<T: ?Sized>(&mut self, ipld: &T) -> Result<(), Error>
where
T: Serialize,
{
let key = self.next_key.take();
let key = key.expect("serialize_value called before serialize_key");
self.map.insert(key, to_ipld(&ipld)?);
Ok(())
}
fn end(self) -> Result<Ipld, Error> {
Ok(Ipld::Map(self.map))
}
}
impl serde::ser::SerializeStruct for SerializeMap {
type Ok = Ipld;
type Error = Error;
fn serialize_field<T: ?Sized>(&mut self, key: &'static str, ipld: &T) -> Result<(), Error>
where
T: Serialize,
{
serde::ser::SerializeMap::serialize_key(self, key)?;
serde::ser::SerializeMap::serialize_value(self, ipld)
}
fn end(self) -> Result<Ipld, Error> {
serde::ser::SerializeMap::end(self)
}
}
impl serde::ser::SerializeStructVariant for SerializeStructVariant {
type Ok = Ipld;
type Error = Error;
fn serialize_field<T: ?Sized>(&mut self, key: &'static str, ipld: &T) -> Result<(), Error>
where
T: Serialize,
{
self.map.insert(String::from(key), to_ipld(&ipld)?);
Ok(())
}
fn end(self) -> Result<Ipld, Error> {
let mut object = BTreeMap::new();
object.insert(self.name, Ipld::Map(self.map));
Ok(Ipld::Map(object))
}
}