added the traits to the crate and made proc macros compatible

This commit is contained in:
2025-07-14 13:18:28 -04:00
parent f9ee10491d
commit 533f718e57

View File

@ -2,12 +2,27 @@ use proc_macro::TokenStream;
use quote::quote; use quote::quote;
use syn::{parse_macro_input, ItemEnum, Lit, DeriveInput, Fields, Data}; use syn::{parse_macro_input, ItemEnum, Lit, DeriveInput, Fields, Data};
#[async_trait]
pub trait Queryable {
///send the query types query and get the response returned as the
///proper response type
pub fn send(
&self,
base_url: &str,
headers: Option<Vec<(&str, &str)>>,
) -> Result<Response, std::io::Error>;
}
pub trait Responsable {
pub fn receive(resp: Response) -> Result<Self, std::error::Error>;
}
#[proc_macro_derive(HttpRequest, attributes(http_get))] #[proc_macro_derive(HttpRequest, attributes(http_get))]
pub fn derive_http_get_request(input: TokenStream) -> TokenStream { pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
let input = parse_macro_input!(input as DeriveInput); let input = parse_macro_input!(input as DeriveInput);
let name = &input.ident; let name = &input.ident;
// Parse #[http_get(url = "...")] attribute // Extract the base URL from #[http_get(url = "...")]
let mut base_url = None; let mut base_url = None;
for attr in &input.attrs { for attr in &input.attrs {
if attr.path().is_ident("http_get") { if attr.path().is_ident("http_get") {
@ -22,7 +37,6 @@ pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
}); });
} }
} }
let base_url = base_url.expect("Missing #[http_get(url = \"...\")] attribute"); let base_url = base_url.expect("Missing #[http_get(url = \"...\")] attribute");
let expanded = match &input.data { let expanded = match &input.data {
@ -46,22 +60,18 @@ pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
quote! { quote! {
impl Queryable for #name { impl Queryable for #name {
pub async fn send( fn send(
&self, &self,
client: std::sync::Arc<awc::Client>, base_url: &str,
headers: Option<Vec<(&str, &str)>>, headers: Option<Vec<(&str, &str)>>,
api_key: Option<&str>, ) -> Result<Response, std::io::Error> {
) -> Result<awc::ClientResponse, actix_web::error::SendRequestError> {
use urlencoding::encode; use urlencoding::encode;
use awc::Client;
let mut query_params: Vec<(String, String)> = Vec::new(); let mut query_params: Vec<(String, String)> = Vec::new();
#(#query_param_code)* #(#query_param_code)*
if let Some(key) = api_key { let mut url = base_url.to_string();
query_params.push(("api_key".to_string(), key.to_string()));
}
let mut url = #base_url.to_string();
if !query_params.is_empty() { if !query_params.is_empty() {
let query_parts: Vec<String> = query_params.iter() let query_parts: Vec<String> = query_params.iter()
.map(|(k, v)| format!("{}={}", k, encode(v))) .map(|(k, v)| format!("{}={}", k, encode(v)))
@ -70,6 +80,7 @@ pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
url.push_str(&query_parts.join("&")); url.push_str(&query_parts.join("&"));
} }
let client = Client::default();
let mut request = client.get(url); let mut request = client.get(url);
if let Some(hdrs) = headers { if let Some(hdrs) = headers {
@ -78,8 +89,18 @@ pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
} }
} }
let response = request.send().await?; let response = actix_web::rt::System::new()
Ok(response) .block_on(async { request.send().await })
.map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e.to_string()))?;
let body_bytes = actix_web::rt::System::new()
.block_on(async { response.body().await })
.map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e.to_string()))?;
let body = Response::receive(body_bytes.to_vec())
.map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e.to_string()))?;
Ok(body)
} }
} }
} }
@ -92,7 +113,7 @@ pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
match &variant.fields { match &variant.fields {
Fields::Unnamed(fields) if fields.unnamed.len() == 1 => { Fields::Unnamed(fields) if fields.unnamed.len() == 1 => {
variant_arms.push(quote! { variant_arms.push(quote! {
#name::#vname(inner) => inner.send(client.clone(), headers.clone(), api_key).await, #name::#vname(inner) => inner.send(base_url, headers.clone()),
}); });
} }
_ => panic!("#[derive(HttpRequest)] enum variants must have a single unnamed field"), _ => panic!("#[derive(HttpRequest)] enum variants must have a single unnamed field"),
@ -100,13 +121,12 @@ pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
} }
quote! { quote! {
impl #name { impl Queryable for #name {
pub async fn send( fn send(
&self, &self,
client: std::sync::Arc<awc::Client>, base_url: &str,
headers: Option<Vec<(&str, &str)>>, headers: Option<Vec<(&str, &str)>>,
api_key: Option<&str>, ) -> Result<Response, std::io::Error> {
) -> Result<awc::ClientResponse, actix_web::error::SendRequestError> {
match self { match self {
#(#variant_arms)* #(#variant_arms)*
} }