feat: create route handler macro

crates/tuono_lib_macros/src/handler.rs

@@ -0,0 +1,35 @@
+use proc_macro::TokenStream;
+use quote::quote;
+use syn::{parse_macro_input, ItemFn};
+
+pub fn handler_core(_args: TokenStream, item: TokenStream) -> TokenStream {
+    let item = parse_macro_input!(item as ItemFn);
+
+    let fn_name = item.clone().sig.ident;
+
+    quote! {
+        use tuono_lib::Response;
+        use axum::response::Html;
+        use axum::http::Uri;
+        use tuono_lib::ssr;
+
+        #item
+
+        pub async fn route(uri: Uri) -> Html<String> {
+            println!("Custom handler");
+           let props = #fn_name();
+
+            let res = match props {
+                Response::Props(val) => ssr::Js::SSR.with(|ssr| ssr.borrow_mut().render_to_string(Some(val.as_str()))),
+                _ => Ok("500 Internal server error".to_string())
+            };
+
+            match res {
+                Ok(html) => Html(html),
+                _ => Html("500".to_string())
+            }
+            
+        }
+    }
+    .into()
+}