2020-03-01 10:54:34 +00:00
|
|
|
use crate::args;
|
2020-03-02 00:24:49 +00:00
|
|
|
use crate::utils::get_crate_name;
|
2020-03-01 10:54:34 +00:00
|
|
|
use proc_macro::TokenStream;
|
|
|
|
use quote::quote;
|
2020-03-01 13:35:39 +00:00
|
|
|
use syn::{Data, DeriveInput, Error, Result};
|
2020-03-01 10:54:34 +00:00
|
|
|
|
|
|
|
pub fn generate(object_args: &args::Object, input: &DeriveInput) -> Result<TokenStream> {
|
2020-03-02 00:24:49 +00:00
|
|
|
let crate_name = get_crate_name(object_args.internal);
|
2020-03-01 10:54:34 +00:00
|
|
|
let ident = &input.ident;
|
|
|
|
let s = match &input.data {
|
|
|
|
Data::Struct(s) => s,
|
|
|
|
_ => return Err(Error::new_spanned(input, "It should be a struct.")),
|
|
|
|
};
|
|
|
|
|
|
|
|
let gql_typename = object_args
|
|
|
|
.name
|
|
|
|
.clone()
|
|
|
|
.unwrap_or_else(|| ident.to_string());
|
|
|
|
|
2020-03-01 13:35:39 +00:00
|
|
|
let mut get_fields = Vec::new();
|
2020-03-01 16:52:05 +00:00
|
|
|
let mut get_json_fields = Vec::new();
|
2020-03-01 13:35:39 +00:00
|
|
|
let mut fields = Vec::new();
|
2020-03-01 16:52:05 +00:00
|
|
|
|
2020-03-01 10:54:34 +00:00
|
|
|
for field in &s.fields {
|
2020-03-01 13:35:39 +00:00
|
|
|
let field_args = args::InputField::parse(&field.attrs)?;
|
2020-03-01 10:54:34 +00:00
|
|
|
let ident = field.ident.as_ref().unwrap();
|
2020-03-01 13:35:39 +00:00
|
|
|
let ty = &field.ty;
|
|
|
|
let name = field_args.name.unwrap_or_else(|| ident.to_string());
|
|
|
|
get_fields.push(quote! {
|
2020-03-02 00:24:49 +00:00
|
|
|
let #ident:#ty = #crate_name::GQLInputValue::parse(obj.remove(#name).unwrap_or(#crate_name::Value::Null))?;
|
2020-03-01 13:35:39 +00:00
|
|
|
});
|
2020-03-01 16:52:05 +00:00
|
|
|
get_json_fields.push(quote! {
|
2020-03-02 00:24:49 +00:00
|
|
|
let #ident:#ty = #crate_name::GQLInputValue::parse_from_json(obj.remove(#name).unwrap_or(#crate_name::serde_json::Value::Null))?;
|
2020-03-01 16:52:05 +00:00
|
|
|
});
|
2020-03-01 13:35:39 +00:00
|
|
|
fields.push(ident);
|
2020-03-01 10:54:34 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
let expanded = quote! {
|
|
|
|
#input
|
|
|
|
|
2020-03-02 00:24:49 +00:00
|
|
|
impl #crate_name::GQLType for #ident {
|
|
|
|
fn type_name() -> std::borrow::Cow<'static, str> {
|
|
|
|
std::borrow::Cow::Borrowed(#gql_typename)
|
2020-03-01 10:54:34 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-03-02 00:24:49 +00:00
|
|
|
impl #crate_name::GQLInputValue for #ident {
|
|
|
|
fn parse(value: #crate_name::Value) -> #crate_name::Result<Self> {
|
|
|
|
if let #crate_name::Value::Object(mut obj) = value {
|
2020-03-01 13:35:39 +00:00
|
|
|
#(#get_fields)*
|
|
|
|
Ok(Self { #(#fields),* })
|
|
|
|
} else {
|
2020-03-02 00:24:49 +00:00
|
|
|
Err(#crate_name::QueryError::ExpectedType {
|
2020-03-01 13:35:39 +00:00
|
|
|
expect: Self::type_name(),
|
|
|
|
actual: value,
|
|
|
|
}.into())
|
|
|
|
}
|
|
|
|
}
|
2020-03-01 16:52:05 +00:00
|
|
|
|
2020-03-02 00:24:49 +00:00
|
|
|
fn parse_from_json(value: #crate_name::serde_json::Value) -> #crate_name::Result<Self> {
|
|
|
|
if let #crate_name::serde_json::Value::Object(mut obj) = value {
|
2020-03-01 16:52:05 +00:00
|
|
|
#(#get_json_fields)*
|
|
|
|
Ok(Self { #(#fields),* })
|
|
|
|
} else {
|
2020-03-02 00:24:49 +00:00
|
|
|
Err(#crate_name::QueryError::ExpectedJsonType {
|
2020-03-01 16:52:05 +00:00
|
|
|
expect: Self::type_name(),
|
|
|
|
actual: value,
|
|
|
|
}.into())
|
|
|
|
}
|
|
|
|
}
|
2020-03-01 10:54:34 +00:00
|
|
|
}
|
2020-03-01 13:35:39 +00:00
|
|
|
|
2020-03-02 00:24:49 +00:00
|
|
|
impl #crate_name::GQLInputObject for #ident {}
|
2020-03-01 10:54:34 +00:00
|
|
|
};
|
|
|
|
Ok(expanded.into())
|
|
|
|
}
|