528 lines
22 KiB
Rust
528 lines
22 KiB
Rust
use crate::args;
|
|
use crate::output_type::OutputType;
|
|
use crate::utils::{
|
|
generate_default, generate_guards, generate_validator, get_cfg_attrs, get_crate_name,
|
|
get_param_getter_ident, get_rustdoc, parse_graphql_attrs, remove_graphql_attrs,
|
|
GeneratorResult,
|
|
};
|
|
use inflector::Inflector;
|
|
use proc_macro::TokenStream;
|
|
use quote::quote;
|
|
use syn::ext::IdentExt;
|
|
use syn::{Block, Error, FnArg, ImplItem, ItemImpl, Pat, ReturnType, Type, TypeReference};
|
|
|
|
pub fn generate(
|
|
object_args: &args::Object,
|
|
item_impl: &mut ItemImpl,
|
|
) -> GeneratorResult<TokenStream> {
|
|
let crate_name = get_crate_name(object_args.internal);
|
|
let (self_ty, self_name) = match item_impl.self_ty.as_ref() {
|
|
Type::Path(path) => (
|
|
path,
|
|
path.path
|
|
.segments
|
|
.last()
|
|
.map(|s| s.ident.to_string())
|
|
.unwrap(),
|
|
),
|
|
_ => return Err(Error::new_spanned(&item_impl.self_ty, "Invalid type").into()),
|
|
};
|
|
let generics = &item_impl.generics;
|
|
let where_clause = &item_impl.generics.where_clause;
|
|
let extends = object_args.extends;
|
|
let gql_typename = object_args
|
|
.name
|
|
.clone()
|
|
.unwrap_or_else(|| self_name.clone());
|
|
|
|
let desc = get_rustdoc(&item_impl.attrs)?
|
|
.map(|s| quote! { Some(#s) })
|
|
.unwrap_or_else(|| quote! {None});
|
|
|
|
let mut resolvers = Vec::new();
|
|
let mut schema_fields = Vec::new();
|
|
let mut find_entities = Vec::new();
|
|
let mut add_keys = Vec::new();
|
|
let mut create_entity_types = Vec::new();
|
|
|
|
for item in &mut item_impl.items {
|
|
if let ImplItem::Method(method) = item {
|
|
let method_args: args::ObjectField =
|
|
parse_graphql_attrs(&method.attrs)?.unwrap_or_default();
|
|
|
|
if method_args.entity {
|
|
let cfg_attrs = get_cfg_attrs(&method.attrs);
|
|
|
|
if method.sig.asyncness.is_none() {
|
|
return Err(Error::new_spanned(&method, "Must be asynchronous").into());
|
|
}
|
|
|
|
let ty = match &method.sig.output {
|
|
ReturnType::Type(_, ty) => OutputType::parse(ty)?,
|
|
ReturnType::Default => {
|
|
return Err(Error::new_spanned(&method.sig.output, "Missing type").into())
|
|
}
|
|
};
|
|
let mut create_ctx = true;
|
|
let mut args = Vec::new();
|
|
|
|
for (idx, arg) in method.sig.inputs.iter_mut().enumerate() {
|
|
if let FnArg::Receiver(receiver) = arg {
|
|
if idx != 0 {
|
|
return Err(Error::new_spanned(
|
|
receiver,
|
|
"The self receiver must be the first parameter.",
|
|
)
|
|
.into());
|
|
}
|
|
} else if let FnArg::Typed(pat) = arg {
|
|
if idx == 0 {
|
|
return Err(Error::new_spanned(
|
|
pat,
|
|
"The self receiver must be the first parameter.",
|
|
)
|
|
.into());
|
|
}
|
|
|
|
match (&*pat.pat, &*pat.ty) {
|
|
(Pat::Ident(arg_ident), Type::Path(arg_ty)) => {
|
|
args.push((
|
|
arg_ident.clone(),
|
|
arg_ty.clone(),
|
|
parse_graphql_attrs::<args::Argument>(&pat.attrs)?
|
|
.unwrap_or_default(),
|
|
));
|
|
remove_graphql_attrs(&mut pat.attrs);
|
|
}
|
|
(arg, Type::Reference(TypeReference { elem, .. })) => {
|
|
if let Type::Path(path) = elem.as_ref() {
|
|
if idx != 1
|
|
|| path.path.segments.last().unwrap().ident != "Context"
|
|
{
|
|
return Err(Error::new_spanned(
|
|
arg,
|
|
"The Context must be the second argument.",
|
|
)
|
|
.into());
|
|
} else {
|
|
create_ctx = false;
|
|
}
|
|
}
|
|
}
|
|
_ => {
|
|
return Err(Error::new_spanned(arg, "Invalid argument type.").into())
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if create_ctx {
|
|
let arg =
|
|
syn::parse2::<FnArg>(quote! { _: &#crate_name::Context<'_> }).unwrap();
|
|
method.sig.inputs.insert(1, arg);
|
|
}
|
|
|
|
let entity_type = ty.value_type();
|
|
let mut key_pat = Vec::new();
|
|
let mut key_getter = Vec::new();
|
|
let mut use_keys = Vec::new();
|
|
let mut keys = Vec::new();
|
|
let mut keys_str = String::new();
|
|
let mut requires_getter = Vec::new();
|
|
let all_key = args.iter().all(|(_, _, arg)| !arg.key);
|
|
|
|
if args.is_empty() {
|
|
return Err(Error::new_spanned(
|
|
method,
|
|
"Entity need to have at least one key.",
|
|
)
|
|
.into());
|
|
}
|
|
|
|
for (ident, ty, args::Argument { name, key, .. }) in &args {
|
|
let is_key = all_key || *key;
|
|
let name = name
|
|
.clone()
|
|
.unwrap_or_else(|| ident.ident.unraw().to_string().to_camel_case());
|
|
|
|
if is_key {
|
|
if !keys_str.is_empty() {
|
|
keys_str.push(' ');
|
|
}
|
|
keys_str.push_str(&name);
|
|
|
|
key_pat.push(quote! {
|
|
Some(#ident)
|
|
});
|
|
key_getter.push(quote! {
|
|
params.get(#name).and_then(|value| {
|
|
let value: Option<#ty> = #crate_name::InputValueType::parse(Some(value.clone())).ok();
|
|
value
|
|
})
|
|
});
|
|
keys.push(name);
|
|
use_keys.push(ident);
|
|
} else {
|
|
// requires
|
|
requires_getter.push(quote! {
|
|
let #ident: #ty = #crate_name::InputValueType::parse(params.get(#name).cloned()).
|
|
map_err(|err| err.into_server_error().at(ctx.item.pos))?;
|
|
});
|
|
use_keys.push(ident);
|
|
}
|
|
}
|
|
|
|
add_keys.push(quote! { registry.add_keys(&<#entity_type as #crate_name::Type>::type_name(), #keys_str); });
|
|
create_entity_types.push(
|
|
quote! { <#entity_type as #crate_name::Type>::create_type_info(registry); },
|
|
);
|
|
|
|
let field_ident = &method.sig.ident;
|
|
if let OutputType::Value(inner_ty) = &ty {
|
|
let block = &method.block;
|
|
let new_block = quote!({
|
|
{
|
|
let value:#inner_ty = async move #block.await;
|
|
Ok(value)
|
|
}
|
|
});
|
|
method.block = syn::parse2::<Block>(new_block).expect("invalid block");
|
|
method.sig.output =
|
|
syn::parse2::<ReturnType>(quote! { -> #crate_name::Result<#inner_ty> })
|
|
.expect("invalid result type");
|
|
}
|
|
let do_find = quote! { self.#field_ident(ctx, #(#use_keys),*).await.map_err(|err| err.into_server_error().at(ctx.item.pos))? };
|
|
|
|
find_entities.push((
|
|
args.len(),
|
|
quote! {
|
|
#(#cfg_attrs)*
|
|
if typename == &<#entity_type as #crate_name::Type>::type_name() {
|
|
if let (#(#key_pat),*) = (#(#key_getter),*) {
|
|
#(#requires_getter)*
|
|
let ctx_obj = ctx.with_selection_set(&ctx.item.node.selection_set);
|
|
return #crate_name::OutputValueType::resolve(&#do_find, &ctx_obj, ctx.item).await.map(::std::option::Option::Some);
|
|
}
|
|
}
|
|
},
|
|
));
|
|
} else if !method_args.skip {
|
|
if method.sig.asyncness.is_none() {
|
|
return Err(Error::new_spanned(&method, "Must be asynchronous").into());
|
|
}
|
|
|
|
let field_name = method_args
|
|
.name
|
|
.clone()
|
|
.unwrap_or_else(|| method.sig.ident.unraw().to_string().to_camel_case());
|
|
let field_desc = get_rustdoc(&method.attrs)?
|
|
.map(|s| quote! { Some(#s) })
|
|
.unwrap_or_else(|| quote! {None});
|
|
let field_deprecation = method_args
|
|
.deprecation
|
|
.as_ref()
|
|
.map(|s| quote! {Some(#s)})
|
|
.unwrap_or_else(|| quote! {None});
|
|
let external = method_args.external;
|
|
let requires = match &method_args.requires {
|
|
Some(requires) => quote! { Some(#requires) },
|
|
None => quote! { None },
|
|
};
|
|
let provides = match &method_args.provides {
|
|
Some(provides) => quote! { Some(#provides) },
|
|
None => quote! { None },
|
|
};
|
|
let ty = match &method.sig.output {
|
|
ReturnType::Type(_, ty) => OutputType::parse(ty)?,
|
|
ReturnType::Default => {
|
|
return Err(Error::new_spanned(&method.sig.output, "Missing type").into())
|
|
}
|
|
};
|
|
let cache_control = {
|
|
let public = method_args.cache_control.is_public();
|
|
let max_age = method_args.cache_control.max_age;
|
|
quote! {
|
|
#crate_name::CacheControl {
|
|
public: #public,
|
|
max_age: #max_age,
|
|
}
|
|
}
|
|
};
|
|
let cfg_attrs = get_cfg_attrs(&method.attrs);
|
|
|
|
let mut create_ctx = true;
|
|
let mut args = Vec::new();
|
|
|
|
for (idx, arg) in method.sig.inputs.iter_mut().enumerate() {
|
|
if let FnArg::Receiver(receiver) = arg {
|
|
if idx != 0 {
|
|
return Err(Error::new_spanned(
|
|
receiver,
|
|
"The self receiver must be the first parameter.",
|
|
)
|
|
.into());
|
|
}
|
|
} else if let FnArg::Typed(pat) = arg {
|
|
if idx == 0 {
|
|
return Err(Error::new_spanned(
|
|
pat,
|
|
"The self receiver must be the first parameter.",
|
|
)
|
|
.into());
|
|
}
|
|
|
|
match (&*pat.pat, &*pat.ty) {
|
|
(Pat::Ident(arg_ident), Type::Path(arg_ty)) => {
|
|
args.push((
|
|
arg_ident.clone(),
|
|
arg_ty.clone(),
|
|
parse_graphql_attrs::<args::Argument>(&pat.attrs)?
|
|
.unwrap_or_default(),
|
|
));
|
|
remove_graphql_attrs(&mut pat.attrs);
|
|
}
|
|
(arg, Type::Reference(TypeReference { elem, .. })) => {
|
|
if let Type::Path(path) = elem.as_ref() {
|
|
if idx != 1
|
|
|| path.path.segments.last().unwrap().ident != "Context"
|
|
{
|
|
return Err(Error::new_spanned(
|
|
arg,
|
|
"The Context must be the second argument.",
|
|
)
|
|
.into());
|
|
}
|
|
|
|
create_ctx = false;
|
|
}
|
|
}
|
|
_ => {
|
|
return Err(Error::new_spanned(arg, "Invalid argument type.").into())
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if create_ctx {
|
|
let arg =
|
|
syn::parse2::<FnArg>(quote! { _: &#crate_name::Context<'_> }).unwrap();
|
|
method.sig.inputs.insert(1, arg);
|
|
}
|
|
|
|
let mut schema_args = Vec::new();
|
|
let mut use_params = Vec::new();
|
|
let mut get_params = Vec::new();
|
|
|
|
for (
|
|
ident,
|
|
ty,
|
|
args::Argument {
|
|
name,
|
|
desc,
|
|
default,
|
|
default_with,
|
|
validator,
|
|
..
|
|
},
|
|
) in args
|
|
{
|
|
let name = name
|
|
.clone()
|
|
.unwrap_or_else(|| ident.ident.unraw().to_string().to_camel_case());
|
|
let desc = desc
|
|
.as_ref()
|
|
.map(|s| quote! {Some(#s)})
|
|
.unwrap_or_else(|| quote! {None});
|
|
let default = generate_default(&default, &default_with)?;
|
|
let schema_default = default
|
|
.as_ref()
|
|
.map(|value| {
|
|
quote! {Some( <#ty as #crate_name::InputValueType>::to_value(&#value).to_string() )}
|
|
})
|
|
.unwrap_or_else(|| quote! {None});
|
|
|
|
let validator = match &validator {
|
|
Some(meta) => {
|
|
let stream = generate_validator(&crate_name, meta)?;
|
|
quote!(Some(#stream))
|
|
}
|
|
None => quote!(None),
|
|
};
|
|
|
|
schema_args.push(quote! {
|
|
args.insert(#name, #crate_name::registry::MetaInputValue {
|
|
name: #name,
|
|
description: #desc,
|
|
ty: <#ty as #crate_name::Type>::create_type_info(registry),
|
|
default_value: #schema_default,
|
|
validator: #validator,
|
|
});
|
|
});
|
|
|
|
let param_ident = &ident.ident;
|
|
use_params.push(quote! { #param_ident });
|
|
|
|
let default = match default {
|
|
Some(default) => quote! { Some(|| -> #ty { #default }) },
|
|
None => quote! { None },
|
|
};
|
|
let param_getter_name = get_param_getter_ident(&ident.ident.to_string());
|
|
get_params.push(quote! {
|
|
let #param_getter_name = || -> #crate_name::ServerResult<#ty> { ctx.param_value(#name, #default) };
|
|
let #ident: #ty = #param_getter_name()?;
|
|
});
|
|
}
|
|
|
|
let schema_ty = ty.value_type();
|
|
|
|
schema_fields.push(quote! {
|
|
#(#cfg_attrs)*
|
|
fields.insert(#field_name.to_string(), #crate_name::registry::MetaField {
|
|
name: #field_name.to_string(),
|
|
description: #field_desc,
|
|
args: {
|
|
let mut args = #crate_name::indexmap::IndexMap::new();
|
|
#(#schema_args)*
|
|
args
|
|
},
|
|
ty: <#schema_ty as #crate_name::Type>::create_type_info(registry),
|
|
deprecation: #field_deprecation,
|
|
cache_control: #cache_control,
|
|
external: #external,
|
|
provides: #provides,
|
|
requires: #requires,
|
|
});
|
|
});
|
|
|
|
let field_ident = &method.sig.ident;
|
|
if let OutputType::Value(inner_ty) = &ty {
|
|
let block = &method.block;
|
|
let new_block = quote!({
|
|
{
|
|
let value:#inner_ty = async move #block.await;
|
|
Ok(value)
|
|
}
|
|
});
|
|
method.block = syn::parse2::<Block>(new_block).expect("invalid block");
|
|
method.sig.output =
|
|
syn::parse2::<ReturnType>(quote! { -> #crate_name::Result<#inner_ty> })
|
|
.expect("invalid result type");
|
|
}
|
|
|
|
let resolve_obj = quote! {
|
|
{
|
|
let res = self.#field_ident(ctx, #(#use_params),*).await;
|
|
res.map_err(|err| err.into_server_error().at(ctx.item.pos))?
|
|
}
|
|
};
|
|
|
|
let guard = match &method_args.guard {
|
|
Some(meta_list) => generate_guards(&crate_name, meta_list)?,
|
|
None => None,
|
|
};
|
|
|
|
let guard = guard.map(|guard| {
|
|
quote! {
|
|
#guard.check(ctx).await
|
|
.map_err(|err| err.into_server_error().at(ctx.item.pos))?;
|
|
}
|
|
});
|
|
|
|
resolvers.push(quote! {
|
|
#(#cfg_attrs)*
|
|
if ctx.item.node.name.node == #field_name {
|
|
#(#get_params)*
|
|
#guard
|
|
let ctx_obj = ctx.with_selection_set(&ctx.item.node.selection_set);
|
|
let res = #resolve_obj;
|
|
return #crate_name::OutputValueType::resolve(&res, &ctx_obj, ctx.item).await.map(::std::option::Option::Some);
|
|
}
|
|
});
|
|
}
|
|
|
|
remove_graphql_attrs(&mut method.attrs);
|
|
}
|
|
}
|
|
|
|
let cache_control = {
|
|
let public = object_args.cache_control.is_public();
|
|
let max_age = object_args.cache_control.max_age;
|
|
quote! {
|
|
#crate_name::CacheControl {
|
|
public: #public,
|
|
max_age: #max_age,
|
|
}
|
|
}
|
|
};
|
|
|
|
find_entities.sort_by(|(a, _), (b, _)| b.cmp(a));
|
|
let find_entities_iter = find_entities.iter().map(|(_, code)| code);
|
|
|
|
let expanded = quote! {
|
|
#item_impl
|
|
|
|
#[allow(clippy::all, clippy::pedantic)]
|
|
impl #generics #crate_name::Type for #self_ty #where_clause {
|
|
fn type_name() -> ::std::borrow::Cow<'static, str> {
|
|
::std::borrow::Cow::Borrowed(#gql_typename)
|
|
}
|
|
|
|
fn create_type_info(registry: &mut #crate_name::registry::Registry) -> String {
|
|
let ty = registry.create_type::<Self, _>(|registry| #crate_name::registry::MetaType::Object {
|
|
name: #gql_typename.to_string(),
|
|
description: #desc,
|
|
fields: {
|
|
let mut fields = #crate_name::indexmap::IndexMap::new();
|
|
#(#schema_fields)*
|
|
fields
|
|
},
|
|
cache_control: #cache_control,
|
|
extends: #extends,
|
|
keys: None,
|
|
});
|
|
#(#create_entity_types)*
|
|
#(#add_keys)*
|
|
ty
|
|
}
|
|
}
|
|
|
|
#[allow(clippy::all, clippy::pedantic, clippy::suspicious_else_formatting)]
|
|
#[allow(unused_braces, unused_variables, unused_parens, unused_mut)]
|
|
#[#crate_name::async_trait::async_trait]
|
|
impl#generics #crate_name::resolver_utils::ContainerType for #self_ty #where_clause {
|
|
async fn resolve_field(&self, ctx: &#crate_name::Context<'_>) -> #crate_name::ServerResult<::std::option::Option<#crate_name::Value>> {
|
|
#(#resolvers)*
|
|
Ok(None)
|
|
}
|
|
|
|
async fn find_entity(&self, ctx: &#crate_name::Context<'_>, params: &#crate_name::Value) -> #crate_name::ServerResult<::std::option::Option<#crate_name::Value>> {
|
|
let params = match params {
|
|
#crate_name::Value::Object(params) => params,
|
|
_ => return Ok(None),
|
|
};
|
|
let typename = if let Some(#crate_name::Value::String(typename)) = params.get("__typename") {
|
|
typename
|
|
} else {
|
|
return Err(
|
|
#crate_name::ServerError::new(r#""__typename" must be an existing string."#)
|
|
.at(ctx.item.pos)
|
|
);
|
|
};
|
|
#(#find_entities_iter)*
|
|
Ok(None)
|
|
}
|
|
}
|
|
|
|
#[allow(clippy::all, clippy::pedantic)]
|
|
#[#crate_name::async_trait::async_trait]
|
|
impl #generics #crate_name::OutputValueType for #self_ty #where_clause {
|
|
async fn resolve(&self, ctx: &#crate_name::ContextSelectionSet<'_>, _field: &#crate_name::Positioned<#crate_name::parser::types::Field>) -> #crate_name::ServerResult<#crate_name::Value> {
|
|
#crate_name::resolver_utils::resolve_container(ctx, self).await
|
|
}
|
|
}
|
|
|
|
impl #generics #crate_name::ObjectType for #self_ty #where_clause {}
|
|
};
|
|
Ok(expanded.into())
|
|
}
|