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101 lines
2.2 KiB
Rust
101 lines
2.2 KiB
Rust
use crate::hydrus_serializable::wrapper::HydrusSerWrapper;
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use crate::FromJson;
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use serde::de::{DeserializeOwned, Error, Visitor};
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use serde::{Deserialize, Deserializer};
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use serde_json::Value;
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use std::fmt::Formatter;
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use std::marker::PhantomData;
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pub mod content_update;
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pub mod definitions_update;
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pub mod dictionary;
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pub mod metadata;
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pub mod tag_filter;
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pub mod wrapper;
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pub trait HydrusSerializable: DeserializeOwned {
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fn type_id() -> u64;
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}
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impl<T> FromJson for T
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where
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T: HydrusSerializable,
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{
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fn from_json(value: Value) -> crate::Result<Self>
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where
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Self: Sized,
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{
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let wrapper = serde_json::from_value::<HydrusSerWrapper<T>>(value)?;
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Ok(wrapper.inner)
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}
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}
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pub trait ConstNumberTrait {
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fn value() -> u64;
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}
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impl<T> ConstNumberTrait for T
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where
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T: HydrusSerializable,
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{
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fn value() -> u64 {
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T::type_id()
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}
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}
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#[derive(Clone, Debug)]
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pub struct SerializableId<T: ConstNumberTrait>(u64, PhantomData<T>);
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impl<'de, T: ConstNumberTrait> Deserialize<'de> for SerializableId<T> {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: Deserializer<'de>,
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{
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deserializer.deserialize_u64(SerIdVisitor(PhantomData))
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}
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}
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struct SerIdVisitor<T>(PhantomData<T>);
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impl<'de, T: ConstNumberTrait> Visitor<'de> for SerIdVisitor<T> {
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type Value = SerializableId<T>;
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fn expecting(&self, formatter: &mut Formatter) -> std::fmt::Result {
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write!(formatter, "an unsigned integer equal to {}", T::value())
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}
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fn visit_u8<E>(self, v: u8) -> Result<Self::Value, E>
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where
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E: Error,
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{
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self.visit_u64(v as u64)
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}
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fn visit_u16<E>(self, v: u16) -> Result<Self::Value, E>
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where
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E: Error,
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{
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self.visit_u64(v as u64)
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}
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fn visit_u32<E>(self, v: u32) -> Result<Self::Value, E>
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where
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E: Error,
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{
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self.visit_u64(v as u64)
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}
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fn visit_u64<E>(self, v: u64) -> Result<Self::Value, E>
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where
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E: Error,
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{
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let expected_value = T::value();
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if v != expected_value {
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Err(E::custom(format!("value not equal to {}", expected_value)))
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} else {
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Ok(SerializableId(expected_value, PhantomData))
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}
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}
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}
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