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use quote::quote;
use syn::{Data, DeriveInput, Fields, Meta, Path};
use super::ValidatorHandler;
use crate::{
common::{attributes::basic_attribute::BasicAttribute, type_enum::TypeEnum},
panic,
};
pub(crate) struct JsonHandler;
#[allow(dead_code)]
#[derive(Debug)]
pub struct Struct(TypeEnum);
const ITEM: Struct = Struct(TypeEnum::Serde);
impl ValidatorHandler for JsonHandler {
fn meta_handler(ast: DeriveInput, meta: Meta) -> syn::Result<proc_macro2::TokenStream> {
#[allow(unused_variables)]
let type_attribute = BasicAttribute::build_from_meta(&meta)?;
if let Data::Struct(data) = ast.data
&& let Fields::Unnamed(_) = &data.fields
&& data.fields.len() == 1
{
let mut token_stream = proc_macro2::TokenStream::new();
let name = ast.ident;
let data_type = data.fields.into_iter().next().unwrap().ty;
let error_path: Path = syn::parse2(quote! { validators_prelude::JsonError }).unwrap();
token_stream.extend(quote! {
impl #name {
fn v_parse_str(s: &str) -> Result<#data_type, #error_path> {
Ok(validators_prelude::serde_json::from_str(s)?)
}
#[inline]
fn v_parse_i128(i: i128) -> Result<#data_type, #error_path> {
let value = validators_prelude::serde_json::to_value(i)?;
Ok(validators_prelude::serde_json::from_value(value)?)
}
#[inline]
fn v_parse_i64(i: i64) -> Result<#data_type, #error_path> {
let value = validators_prelude::serde_json::to_value(i)?;
Ok(validators_prelude::serde_json::from_value(value)?)
}
#[inline]
fn v_parse_u128(u: u128) -> Result<#data_type, #error_path> {
let value = validators_prelude::serde_json::to_value(u)?;
Ok(validators_prelude::serde_json::from_value(value)?)
}
#[inline]
fn v_parse_u64(u: u64) -> Result<#data_type, #error_path> {
let value = validators_prelude::serde_json::to_value(u)?;
Ok(validators_prelude::serde_json::from_value(value)?)
}
#[inline]
fn v_parse_f64(f: f64) -> Result<#data_type, #error_path> {
let value = validators_prelude::serde_json::to_value(f)?;
Ok(validators_prelude::serde_json::from_value(value)?)
}
#[inline]
fn v_parse_bool(b: bool) -> Result<#data_type, #error_path> {
let value = validators_prelude::serde_json::to_value(b)?;
Ok(validators_prelude::serde_json::from_value(value)?)
}
#[inline]
fn v_parse_json_value(v: validators_prelude::serde_json::Value) -> Result<#data_type, #error_path> {
Ok(validators_prelude::serde_json::from_value(v)?)
}
}
});
token_stream.extend(quote! {
impl ValidateString for #name {
type Error = #error_path;
#[inline]
fn parse_string<S: Into<validators_prelude::String>>(s: S) -> Result<Self, Self::Error> {
Ok(Self(Self::v_parse_str(s.into().as_str())?))
}
#[inline]
fn parse_str<S: AsRef<str>>(s: S) -> Result<Self, Self::Error> {
Ok(Self(Self::v_parse_str(s.as_ref())?))
}
#[inline]
fn validate_str<S: AsRef<str>>(s: S) -> Result<(), Self::Error> {
Self::v_parse_str(s.as_ref())?;
Ok(())
}
}
impl ValidateSignedInteger for #name {
type Error = #error_path;
#[inline]
fn parse_i128(i: i128) -> Result<Self, Self::Error> {
Ok(Self(Self::v_parse_i128(i)?))
}
#[inline]
fn parse_i64(i: i64) -> Result<Self, Self::Error> {
Ok(Self(Self::v_parse_i64(i)?))
}
#[inline]
fn validate_i128(i: i128) -> Result<(), Self::Error> {
Self::v_parse_i128(i)?;
Ok(())
}
#[inline]
fn validate_i64(i: i64) -> Result<(), Self::Error> {
Self::v_parse_i64(i)?;
Ok(())
}
}
impl ValidateUnsignedInteger for #name {
type Error = #error_path;
#[inline]
fn parse_u128(u: u128) -> Result<Self, Self::Error> {
Ok(Self(Self::v_parse_u128(u)?))
}
#[inline]
fn parse_u64(u: u64) -> Result<Self, Self::Error> {
Ok(Self(Self::v_parse_u64(u)?))
}
#[inline]
fn validate_u128(u: u128) -> Result<(), Self::Error> {
Self::v_parse_u128(u)?;
Ok(())
}
#[inline]
fn validate_u64(u: u64) -> Result<(), Self::Error> {
Self::v_parse_u64(u)?;
Ok(())
}
}
impl ValidateNumber for #name {
type Error = #error_path;
#[inline]
fn parse_f64(f: f64) -> Result<Self, Self::Error> {
Ok(Self(Self::v_parse_f64(f)?))
}
#[inline]
fn validate_f64(f: f64) -> Result<(), Self::Error> {
Self::v_parse_f64(f)?;
Ok(())
}
}
impl ValidateBoolean for #name {
type Error = #error_path;
#[inline]
fn parse_bool(b: bool) -> Result<Self, Self::Error> {
Ok(Self(Self::v_parse_bool(b)?))
}
#[inline]
fn validate_bool(b: bool) -> Result<(), Self::Error> {
Self::v_parse_bool(b)?;
Ok(())
}
}
impl ValidateJsonValue for #name {
type Error = #error_path;
#[inline]
fn parse_json_value(v: validators_prelude::serde_json::Value) -> Result<Self, Self::Error> {
Ok(Self(Self::v_parse_json_value(v)?))
}
#[inline]
fn validate_json_value(v: validators_prelude::serde_json::Value) -> Result<(), Self::Error> {
Self::v_parse_json_value(v)?;
Ok(())
}
}
});
token_stream.extend(quote! {
impl ToJsonString for #name {
fn to_minified_json_string(&self) -> String {
validators_prelude::serde_json::to_string(&self.0).unwrap()
}
fn to_beautified_json_string(&self) -> String {
validators_prelude::serde_json::to_string_pretty(&self.0).unwrap()
}
}
});
#[cfg(feature = "serde")]
{
if type_attribute.serde_options.serialize {
token_stream.extend(quote! {
impl validators_prelude::serde::Serialize for #name {
#[inline]
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: validators_prelude::serde::Serializer, {
serializer.serialize_str(&ToJsonString::to_minified_json_string(self))
}
}
});
}
if type_attribute.serde_options.deserialize {
token_stream.extend(quote! {
impl<'de> validators_prelude::serde::Deserialize<'de> for #name {
#[inline]
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: validators_prelude::serde::Deserializer<'de>, {
let value = validators_prelude::serde::Deserialize::deserialize(deserializer)?;
Ok(Self(validators_prelude::serde_json::from_value(value).map_err(validators_prelude::serde::de::Error::custom)?))
}
}
});
}
}
#[cfg(feature = "rocket")]
{
if type_attribute.rocket_options.from_form_field {
crate::common::rocket::impl_from_form_field(&mut token_stream, &name);
}
if type_attribute.rocket_options.from_param {
crate::common::rocket::impl_from_param(&mut token_stream, &name, &error_path);
}
}
return Ok(token_stream);
}
Err(panic::validator_for_specific_item(meta.path(), ITEM))
}
}