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use std::fmt;
use std::marker::PhantomData;
use std::ops::{Deref, DerefMut};
use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
impl Serialize for crate::raw::HaxeDate {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
serializer.serialize_i64(chrono::NaiveDateTime::from(*self).timestamp())
}
}
impl<'de> Deserialize<'de> for crate::raw::HaxeDate {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
let timestamp: i64 = Deserialize::deserialize(deserializer)?;
crate::raw::HaxeDate::try_from_timestamp(timestamp).ok_or_else(|| {
de::Error::invalid_value(de::Unexpected::Signed(timestamp), &"valid timestamp")
})
}
}
macro_rules! declare_markers {
($vis:vis enum $marker_enum:ident($marker_prefix:expr) {
$(
$(#[$adapter_meta:meta])*
$marker_name:ident($adapter_vis:vis $adapter_name:ident($module:ident))
),* $(,)?
}) => {
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
$vis enum $marker_enum {
$($marker_name,)*
Unknown
}
impl $marker_enum {
$vis fn parse(string: &str) -> Option<Self> {
if !string.starts_with($marker_prefix) {
return None;
}
match &string[$marker_prefix.len()..] {
$(stringify!($marker_name) => Some(Self::$marker_name),)*
_ => Some(Self::Unknown)
}
}
#[allow(clippy::wrong_self_convention)]
$vis fn to_str(&self) -> &'static str {
match *self {
$(Self::$marker_name => concat!($marker_prefix, stringify!($marker_name)),)*
Self::Unknown => concat!($marker_prefix, "unknown")
}
}
}
$(declare_markers!(
@declare_adapter $(#[$adapter_meta])*
$adapter_vis struct $adapter_name($module) => $marker_enum::$marker_name
);)*
};
(@declare_adapter $(#[$meta:meta])* $vis:vis struct $adapter:ident($module:ident) => $marker:path) => {
$(#[$meta])*
$vis mod $module {
#![allow(dead_code)]
use super::$adapter;
use serde::{ Serialize, Serializer, Deserialize, Deserializer };
pub fn serialize<T: Serialize, S: Serializer>(value: &T, ser: S) -> Result<S::Ok, S::Error> {
$adapter(value).serialize(ser)
}
pub fn deserialize<'de, T: Deserialize<'de>, D: Deserializer<'de>>(de: D) -> Result<T, D::Error> {
let val: $adapter<T> = Deserialize::deserialize(de)?;
Ok(val.0)
}
}
$(#[$meta])*
#[derive(Debug, Default, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
#[repr(transparent)]
$vis struct $adapter<T>($vis T);
impl<T: fmt::Display> fmt::Display for $adapter<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.0.fmt(f)
}
}
impl<T> From<T> for $adapter<T> {
fn from(inner: T) -> Self { Self(inner) }
}
impl<T> Deref for $adapter<T> {
type Target = T;
fn deref(&self) -> &T { &self.0 }
}
impl<T> DerefMut for $adapter<T> {
fn deref_mut(&mut self) -> &mut T { &mut self.0 }
}
impl<T: Serialize> Serialize for $adapter<T> {
fn serialize<S: Serializer>(&self, ser: S) -> Result<S::Ok, S::Error> {
ser.serialize_newtype_struct($marker.to_str(), &self.0)
}
}
impl<'de, T: Deserialize<'de>> Deserialize<'de> for $adapter<T> {
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
let vis = AdapterVisitor {
kind: $marker,
_marker: PhantomData::<T>,
_lifetime: PhantomData::<&'de ()>,
};
deserializer.deserialize_newtype_struct($marker.to_str(), vis)
.map($adapter)
}
}
}
}
struct AdapterVisitor<'de, T> {
kind: AdapterMarker,
_marker: PhantomData<T>,
_lifetime: PhantomData<&'de ()>,
}
impl<'de, T: Deserialize<'de>> de::Visitor<'de> for AdapterVisitor<'de, T> {
type Value = T;
fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "adapter struct {:?}", self.kind)
}
fn visit_seq<A: de::SeqAccess<'de>>(self, mut seq: A) -> Result<T, A::Error> {
match seq.next_element()? {
None => Err(<A::Error as de::Error>::invalid_length(0, &self)),
Some(value) => Ok(value),
}
}
fn visit_newtype_struct<D: Deserializer<'de>>(self, de: D) -> Result<T, D::Error> {
T::deserialize(de)
}
}
declare_markers! { pub(super) enum AdapterMarker("\0haxeformat::") {
Date(pub DateAdapter(date)),
Array(pub ArrayAdapter(array)),
List(pub ListAdapter(list)),
Struct(pub StructAdapter(struct_obj)),
StringMap(pub StringMapAdapter(string)),
IntMap(pub IntMapAdapter(int)),
ObjectMap(pub ObjectMapAdapter(object)),
Class(pub ClassAdapter(class)),
ClassDef(pub ClassDefAdapter(class_def)),
EnumDef(pub EnumDefAdapter(enum_def)),
Custom(CustomAdapter(custom)),
Exception(pub ExceptionAdapter(exception)),
}}