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use proc_macro2::{TokenStream as TokenStream2, TokenTree};
use quote::{quote, ToTokens};
use serde_json::from_str;
use syn::{FnArg, ImplItem, ImplItemMethod, ItemImpl, ReturnType, Visibility};
pub(crate) fn generate_abi(items: &ItemImpl) -> TokenStream2 {
// 生成 __generate_abi() -> ABI, 其内容如下：todo: 考虑多模块重名的情况
// - 构造ContractMeta(当前是无参构造函数)
let i_name = items.self_ty.as_ref();
let i_name_str = quote!(#i_name).to_string();
let construct = items.items
.iter()
.filter_map(|item| {
match item {
ImplItem::Method(method) => { Some(method) }
_ => None
}
})
.filter(|method| {
method.sig.ident.to_string().eq("new")
})
.map(|method| {
let inputs = generate_inputs(method);
quote! {
fvm_abi::ConstructorSpec {
input: vec![#( #inputs ),*],
}
}
})
.take(1)
.collect::<Vec<_>>()
.pop()
.unwrap();
// - 构造Vec<MethodInfo>
let mut field_id = 0;
let method_info_list = items.items
.iter()
.filter_map(|item| {
match item {
ImplItem::Method(method) => { Some(method) }
_ => None
}
})
.filter(|&method| {
// 排除掉非pub方法和new方法的ABI生成
if let Visibility::Public(_) = method.vis {
return !method.sig.ident.to_string().eq("new");
}
false
})
.map(|method| {
let inputs = generate_inputs(method);
let out_type = match &method.sig.output {
ReturnType::Default => { vec![quote! {}] }
ReturnType::Type(_, ty) => {
let tf = quote! {
fvm_abi::TypeInfo {
type_id: scale_info::meta_type::<#ty>(),
}
};
vec![tf]
}
};
let m_name = method.sig.ident.to_string();
let mut parallel_level: i32 = 3;
let mut re_filed: Vec<TokenStream2> = vec![];
let mut re_call_methods: Vec<TokenStream2> = vec![];
let mut cross_mutex: Vec<TokenStream2> = vec![];
let mut key_name = String::new();
method.attrs.iter().for_each(|x| {
match x.path.segments[0].ident.to_string().as_str() {
"parallel_field" => {
parallel_level = if parallel_level > 2 { 2 } else { parallel_level };
let mut field_name: String = String::new();
let mut para_index: Vec<i32> = vec![];
x.tokens.to_token_stream().into_iter().for_each(|y| {
match y {
TokenTree::Group(g) => {
g.stream().into_iter().for_each(|t| {
match t {
TokenTree::Ident(s1) if s1.to_string() == "field_name"
|| s1.to_string() == "para_index" => {
key_name = s1.to_string();
}
TokenTree::Literal(s2) => {
match key_name.as_str() {
"field_name" => {
field_name = s2.to_string().trim_matches('\"').to_string();
field_id += 1;
}
"para_index" => {
for x in s2.to_string().trim_matches('\"').split(',') {
para_index.push(from_str::<i32>(x.trim())
.expect("index should not contain non numeric"));
}
}
_ => ()
}
}
_ => (),
}
})
}
_ => (),
}
re_filed.push(quote! {fvm_abi::MutexField {
field_name: String::from(#field_name),
field_id: #field_id,
parallel_index: vec![#( #para_index ),*],
}});
});
}
"parallel_call_method" => {
parallel_level = if parallel_level > 2 { 2 } else { parallel_level };
x.tokens.to_token_stream().into_iter().for_each(|y| {
match y {
TokenTree::Group(g) => {
g.stream().into_iter().for_each(|t| {
match t {
TokenTree::Ident(s1) if s1.to_string() == "methods" => {
key_name = s1.to_string();
}
TokenTree::Literal(s2) => {
match key_name.as_str() {
"methods" => {
for x in s2.to_string().trim_matches('\"').split(',') {
re_call_methods.push(quote! { String::from(#x.trim())});
}
}
_ => (),
}
}
_ => ()
}
})
}
_ => (),
}
})
}
"parallel_cross" => {
parallel_level = if parallel_level > 2 { 2 } else { parallel_level };
let mut cross_address: String = String::new();
let mut cross_methods: Vec<TokenStream2> = vec![];
let mut address_index: i32 = -1;
let mut cns_name = String::new();
let mut cns_index = -1;
x.tokens.to_token_stream().into_iter().for_each(|y| {
match y {
TokenTree::Group(g) => {
g.stream().into_iter().for_each(|x| {
match x {
TokenTree::Ident(l) => {
key_name = l.to_string();
}
TokenTree::Literal(s2) => {
match key_name.as_str() {
"address" => {
cross_address = s2.to_string().trim_matches('"').to_string();
}
"methods" => {
for x in s2.to_string().trim_matches('"').split(',') {
cross_methods.push(quote! { String::from(#x.trim())});
}
}
"address_index" => {
address_index = from_str::<i32>(s2.to_string().as_str())
.expect("cross address index should not contain non numeric");
}
"cns_name" => {
cns_name = s2.to_string().trim_matches('"').to_string();
}
"cns_index" => {
cns_index = from_str::<i32>(s2.to_string().as_str())
.expect("cns cross index should not contain non numeric");
}
_ => ()
}
}
_ => ()
}
});
cross_mutex.push(quote! {
fvm_abi::MutexCall {
address_index: #address_index,
address: String::from(#cross_address),
methods: vec![#(#cross_methods), *],
cns_name: String::from(#cns_name),
cns_index: #cns_index,
}
});
}
_ => (),
}
})
}
"parallel_contract" => {
parallel_level = 1
}
_ => {}
}
});
if parallel_level != 2 {
re_filed = vec![];
re_call_methods = vec![];
cross_mutex = vec![];
}
if parallel_level == 3 {
parallel_level = 0
}
quote! {
fvm_abi::MethodInfo {
name: String::from(#m_name),
input: vec![#( #inputs ),*],
output: vec![#( #out_type ),*],
parallel_level: #parallel_level,
mutex_fields: vec![ # (#re_filed), *],
method_calls: vec! [# (#re_call_methods), *],
mutex_calls: vec![#(#cross_mutex), *],
}
}
})
.collect::<Vec<_>>();
let meta_token = quote! {
fvm_abi::ContractMeta {
name: String::from(#i_name_str),
constructor: #construct,
}
};
let methods_token = quote! {
vec![#( #method_info_list ), *]
};
// - 构造ABI结构体, 返回
quote! {
#[cfg(not(target_arch = "wasm32"))]
const _: () = {
use fvm_mock::build_runtime;
#[no_mangle]
pub fn __generate_abi() -> fvm_abi::ABI {
fvm_abi::ABI::new(#meta_token, #methods_token)
}
};
}
}
fn generate_inputs(method: &ImplItemMethod) -> Vec<TokenStream2> {
method.sig.inputs
.iter()
.filter_map(|param| {
// ignore `self` param
match param {
FnArg::Typed(tp) => {
let ty = &tp.ty;
Some(quote! {
fvm_abi::TypeInfo {
type_id: scale_info::meta_type::<#ty>(),
}
})
}
_ => None,
}
})
.collect::<Vec<_>>()
}
pub(crate) fn is_tokens_empty(token_list: &Vec<TokenStream2>) -> bool {
for tk in token_list {
if tk.to_string() != quote! {}.to_string() {
return false;
}
}
true
}
#[cfg(test)]
mod test {
use crate::common::is_tokens_empty;
use quote::quote;
#[test]
fn test_is_tokens_empty() {
let token_list = vec![quote! {}];
assert!(is_tokens_empty(&token_list));
let token_list2 = vec![quote! {}, quote! {use quote::quote;}];
assert_eq!(is_tokens_empty(&token_list2), false)
}
}