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// Copyright (c) Subzero Labs, Inc.
// SPDX-License-Identifier: Apache-2.0
use quote::{format_ident, quote};
use rialo_sol_lang_idl::types::Idl;
pub fn gen_utils_mod(idl: &Idl) -> proc_macro2::TokenStream {
let account = gen_account(idl);
let event = gen_event(idl);
quote! {
/// Program utilities.
pub mod utils {
use super::*;
#account
#event
}
}
}
fn gen_account(idl: &Idl) -> proc_macro2::TokenStream {
let variants = idl
.accounts
.iter()
.map(|acc| format_ident!("{}", acc.name))
.map(|name| quote! { #name(#name) });
let if_statements = idl.accounts.iter().map(|acc| {
let name = format_ident!("{}", acc.name);
quote! {
if value.starts_with(#name::DISCRIMINATOR) {
return #name::try_deserialize_unchecked(&mut &value[..])
.map(Self::#name)
.map_err(Into::into)
}
}
});
quote! {
/// An enum that includes all accounts of the declared program as a tuple variant.
///
/// See [`Self::try_from_bytes`] to create an instance from bytes.
pub enum Account {
#(#variants,)*
}
impl Account {
/// Try to create an account based on the given bytes.
///
/// This method returns an error if the discriminator of the given bytes don't match
/// with any of the existing accounts, or if the deserialization fails.
pub fn try_from_bytes(bytes: &[u8]) -> Result<Self> {
Self::try_from(bytes)
}
}
impl TryFrom<&[u8]> for Account {
type Error = rialo_sol_lang::error::Error;
fn try_from(value: &[u8]) -> Result<Self> {
#(#if_statements)*
Err(ProgramError::InvalidArgument.into())
}
}
}
}
fn gen_event(idl: &Idl) -> proc_macro2::TokenStream {
let variants = idl
.events
.iter()
.map(|ev| format_ident!("{}", ev.name))
.map(|name| quote! { #name(#name) });
let if_statements = idl.events.iter().map(|ev| {
let name = format_ident!("{}", ev.name);
quote! {
if value.starts_with(#name::DISCRIMINATOR) {
return #name::try_from_slice(&value[#name::DISCRIMINATOR.len()..])
.map(Self::#name)
.map_err(Into::into)
}
}
});
quote! {
/// An enum that includes all events of the declared program as a tuple variant.
///
/// See [`Self::try_from_bytes`] to create an instance from bytes.
pub enum Event {
#(#variants,)*
}
impl Event {
/// Try to create an event based on the given bytes.
///
/// This method returns an error if the discriminator of the given bytes don't match
/// with any of the existing events, or if the deserialization fails.
pub fn try_from_bytes(bytes: &[u8]) -> Result<Self> {
Self::try_from(bytes)
}
}
impl TryFrom<&[u8]> for Event {
type Error = rialo_sol_lang::error::Error;
fn try_from(value: &[u8]) -> Result<Self> {
#(#if_statements)*
Err(ProgramError::InvalidArgument.into())
}
}
}
}