From 88257a8f7ea5e26015a1b28e14cc39fbebc90459 Mon Sep 17 00:00:00 2001
From: = <=>
Date: Mon, 9 Sep 2024 00:25:25 +0200
Subject: [PATCH] trying macros

---
 .gitignore     |  1 +
 Cargo.lock     | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml     | 11 +++++++++++
 src/handler.rs |  6 ++++++
 src/lib.rs     | 33 +++++++++++++++++++++++++++++++++
 5 files changed, 97 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/handler.rs
 create mode 100644 src/lib.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..62fb3cc
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,46 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "medusa_macros"
+version = "0.1.0"
+dependencies = [
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5b9d34b8991d19d98081b46eacdd8eb58c6f2b201139f7c5f643cc155a633af"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.77"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f35bcdf61fd8e7be6caf75f429fdca8beb3ed76584befb503b1569faee373ed"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..db028c1
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "medusa_macros"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+syn = { version = "2.0.77",  features = ["full"] }
+quote = "1.0.37"
diff --git a/src/handler.rs b/src/handler.rs
new file mode 100644
index 0000000..085b783
--- /dev/null
+++ b/src/handler.rs
@@ -0,0 +1,6 @@
+
+pub struct Handler {
+    pub module: &'static str,
+    pub method: &'static str,
+    pub handle: fn(model: &str, body: &str) -> Pin<Box<dyn Future<Output = String> + Send>>,
+}
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..50c12e4
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,33 @@
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+use quote::quote;
+use syn::{parse_macro_input, punctuated::Punctuated, LitStr, Token};
+
+#[proc_macro_attribute]
+pub fn handler(args: TokenStream, input: TokenStream) -> TokenStream {
+    let args = parse_macro_input!(args with Punctuated::<LitStr, Token![,]>::parse_terminated);
+
+    let module = &args[0].value();
+    let method = &args[1].value();
+
+    let input_fn = parse_macro_input!(input as syn::ItemFn);
+    let fn_name: syn::Ident = input_fn.sig.ident;
+    let inner_fn_name = syn::Ident::new(&format!("{}_handler", fn_name), fn_name.span());
+
+    let output = quote! {
+        pub const #fn_name: Handler = Handler {
+            module: #module,
+            method: #method,
+            handle: |model: &str, body: &str| -> Pin<Box<dyn Future<Output = String> + Send>> {
+                Box::pin(#inner_fn_name(model, body))
+            }
+        };
+
+        pub fn #inner_fn_name(model: &str, body: &str) -> impl Future<Output = String> + Send {
+            #fn_name(model, body)
+        }
+    };
+
+    output.into()
+}