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use quote::quote;
use syn::{Data, DeriveInput, Fields, Meta, Path};
use super::ValidatorHandler;
use crate::{
common::{
attributes::http_xx_url_attribute::HttpXXUrlAttribute, tri_allow::TriAllow,
type_enum::TypeEnum,
},
panic,
};
pub(crate) struct HttpFtpUrlHandler;
#[allow(dead_code)]
#[derive(Debug)]
pub struct Struct {
url: TypeEnum,
protocol: TypeEnum,
}
const ITEM: Struct = Struct {
url: TypeEnum::Url, protocol: TypeEnum::Protocol
};
impl ValidatorHandler for HttpFtpUrlHandler {
fn meta_handler(ast: DeriveInput, meta: Meta) -> syn::Result<proc_macro2::TokenStream> {
let type_attribute = HttpXXUrlAttribute::build_from_meta(&meta)?;
if let Data::Struct(data) = ast.data
&& let Fields::Named(_) = &data.fields
&& data.fields.len() == 2
{
let mut token_stream = proc_macro2::TokenStream::new();
let name = ast.ident;
let error_path: Path =
syn::parse2(quote! { validators_prelude::HttpFtpURLError }).unwrap();
#[cfg(feature = "test")]
{
let v_local = type_attribute.local;
token_stream.extend(quote! {
impl #name {
pub(crate) const V_LOCAL: validators_prelude::TriAllow = #v_local;
}
});
}
let handle_local = {
match type_attribute.local {
TriAllow::Allow => {
quote! {}
},
_ => {
let check_local = if type_attribute.local.disallow() {
quote! {
if is_local {
return Err(#error_path::LocalDisallow);
}
}
} else {
quote! {
if !is_local {
return Err(#error_path::LocalMust);
}
}
};
quote! {
let is_local = {
match url.host().unwrap() {
validators_prelude::url::Host::Domain(domain) => validators_prelude::is_local_domain(domain),
validators_prelude::url::Host::Ipv4(ip) => validators_prelude::is_local_ipv4(ip),
validators_prelude::url::Host::Ipv6(ip) => validators_prelude::is_local_ipv6(ip),
}
};
#check_local
}
},
}
};
token_stream.extend(quote! {
impl #name {
fn v_parse_str(s: &str) -> Result<(validators_prelude::url::Url, validators_prelude::Protocol), #error_path> {
let protocol = {
use validators_prelude::str_utils::StartsWithIgnoreAsciiCaseMultiple;
if let Some(index) = s.starts_with_ignore_ascii_case_with_lowercase_multiple(&["http:", "https:", "ftp:"]) {
match index {
0 => validators_prelude::Protocol::HTTP,
1 => validators_prelude::Protocol::HTTPS,
2 => validators_prelude::Protocol::FTP,
_ => unreachable!()
}
} else {
return Err(#error_path::ProtocolError);
}
};
let url = validators_prelude::url::Url::parse(s)?;
#handle_local
Ok((url, protocol))
}
}
});
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> {
let (url, protocol) = Self::v_parse_str(s.into().as_str())?;
Ok(Self {
url,
protocol,
})
}
#[inline]
fn parse_str<S: AsRef<str>>(s: S) -> Result<Self, Self::Error> {
let (url, protocol) = Self::v_parse_str(s.as_ref())?;
Ok(Self {
url,
protocol,
})
}
#[inline]
fn validate_str<S: AsRef<str>>(s: S) -> Result<(), Self::Error> {
Self::v_parse_str(s.as_ref())?;
Ok(())
}
}
});
#[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, {
validators_prelude::serde::Serialize::serialize(&self.url, serializer)
}
}
});
}
if type_attribute.serde_options.deserialize {
let expect = {
let mut s = String::from("a http/https/ftp url");
match type_attribute.local {
TriAllow::Allow => (),
TriAllow::Must => {
s.push_str(" which must be local");
},
TriAllow::Disallow => {
s.push_str(" which must not be local");
},
}
s
};
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>, {
struct MyVisitor;
impl<'de> validators_prelude::serde::de::Visitor<'de> for MyVisitor {
type Value = #name;
#[inline]
fn expecting(&self, f: &mut ::core::fmt::Formatter<'_>) -> ::core::fmt::Result {
f.write_str(#expect)
}
#[inline]
fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
where
E: validators_prelude::serde::de::Error, {
<#name as ValidateString>::parse_str(v).map_err(validators_prelude::serde::de::Error::custom)
}
}
deserializer.deserialize_str(MyVisitor)
}
}
});
}
}
#[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))
}
}