added final macro to auto implement cli from api types

src/lib.rs

@@ -3,13 +3,13 @@ use quote::quote;
 use syn::{parse_macro_input, Lit, ItemEnum, DeriveInput, Fields, Data};
 use quote::format_ident;
 
-#[proc_macro_derive(HttpRequest, attributes(http_get, http_response))]
+#[proc_macro_derive(HttpRequest, attributes(http_get, http_response, http_error_type))]
 pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
     let input = parse_macro_input!(input as DeriveInput);
     let query_name = &input.ident;
     let query_name_str = query_name.to_string();
 
-    // Parse optional #[http_response = "..."] attribute via parse_nested_meta
+    // Parse optional #[http_response = "..."] attribute
     let mut response_name_opt: Option<String> = None;
     for attr in &input.attrs {
         if attr.path().is_ident("http_response") {
@@ -37,6 +37,22 @@ pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
     };
     let response_name = format_ident!("{}", response_name_str);
 
+    // Parse optional #[http_error_type = "..."] attribute (default to `current_mod::E`)
+    let mut error_type = syn::Path::from(syn::Ident::new("E", proc_macro2::Span::call_site()));
+    for attr in &input.attrs {
+        if attr.path().is_ident("http_error_type") {
+            attr.parse_nested_meta(|meta| {
+                if meta.path.is_ident("http_error_type") {
+                    let lit: Lit = meta.value()?.parse()?;
+                    if let Lit::Str(litstr) = lit {
+                        error_type = syn::parse_str(&litstr.value()).unwrap();
+                    }
+                }
+                Ok(())
+            }).unwrap_or_else(|e| panic!("Error parsing http_error_type attribute: {}", e));
+        }
+    }
+
     // Extract base URL from #[http_get(url = "...")]
     let mut base_url = None;
     for attr in &input.attrs {
@@ -85,7 +101,7 @@ pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
             async fn send(
                 &self,
                 headers: Option<Vec<(&str, &str)>>,
-            ) -> Result<Self::R, Box<dyn std::error::Error + Send + Sync>> {
+            ) -> Result<Self::R, #error_type> {  // Use the error type here
                 use awc::Client;
                 use urlencoding::encode;
 
@@ -131,119 +147,158 @@ pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
 #[proc_macro_attribute]
 pub fn alpaca_cli(_attr: TokenStream, item: TokenStream) -> TokenStream {
     let input_enum = parse_macro_input!(item as ItemEnum);
-    let enum_name = &input_enum.ident;
+    let top_enum_ident = &input_enum.ident;
-    let variants = &input_enum.variants;
+    let top_variants = &input_enum.variants;
 
-    // Match arms for regular command variants (Single, Asset, etc.)
+    // Build outer match arms
-    let regular_arms = variants.iter().filter_map(|v| {
+    let match_arms: Vec<_> = top_variants.iter().map(|variant| {
-        let v_name = &v.ident;
+        let variant_ident = &variant.ident;
 
-        // Skip Bulk variant — we handle it separately
+        // Expecting tuple variants like Alpaca(AlpacaCmd)
-        if v_name == "Bulk" {
+        let inner_type = match &variant.fields {
-            return None;
+            Fields::Unnamed(fields) if fields.unnamed.len() == 1 => {
+                match &fields.unnamed.first().unwrap().ty {
+                    syn::Type::Path(p) => p.path.segments.last().unwrap().ident.clone(),
+                    _ => panic!("Expected tuple variant with a type path"),
                 }
-
-        Some(quote! {
-            #enum_name::#v_name(req) => {
-                let res = req.send(client.clone(), &api_key).await?;
-                let body = res.body().await?;
-                println!("{}", std::str::from_utf8(&body)?);
             }
-        })
+            _ => panic!("Each variant must be a tuple variant like `Alpaca(AlpacaCmd)`"),
-    });
+        };
 
-    let expanded = quote! {
+        quote! {
-        #[derive(structopt::StructOpt, Debug)]
+            #top_enum_ident::#variant_ident(inner) => {
-        #input_enum
+                match inner {
-
+                    #inner_type::Bulk { input } => {
-        #[tokio::main]
+                        let mut reader: Box<dyn std::io::Read> = match input {
-        async fn main() -> Result<(), Box<dyn std::error::Error>> {
+                            Some(path) => Box::new(std::fs::File::open(path)?),
-            use structopt::StructOpt;
-            use std::fs::File;
-            use std::io::{BufReader, Read};
-            use std::sync::Arc;
-            use std::thread;
-
-            const THREADS: usize = 4;
-
-            // Initialize shared HTTP client and API key
-            let client = Arc::new(awc::Client::default());
-            let api_key = std::env::var("APCA_API_KEY_ID")?;
-            let cmd = #enum_name::from_args();
-
-            match cmd {
-                #(#regular_arms)*
-
-                #enum_name::Bulk { input } => {
-                    // Choose input source: file or stdin
-                    let mut reader: Box<dyn Read> = match input {
-                        Some(path) => Box::new(File::open(path)?),
                             None => Box::new(std::io::stdin()),
                         };
 
-                    // Read input JSON into buffer
                         let mut buf = String::new();
                         reader.read_to_string(&mut buf)?;
+                        let queries: Vec<#inner_type> = serde_json::from_str(&buf)?;
 
-                    // Deserialize into Vec<Query>
+                        use std::sync::Arc;
-                    let queries: Vec<Query> = serde_json::from_str(&buf)?;
+                        let client = Arc::new(awc::Client::default());
+                        let keys = Arc::new(crate::load_api_keys()?);
+
+                        const THREADS: usize = 4;
                         let total = queries.len();
-
+                        let per_thread = std::cmp::max(1, total / THREADS);
-                    if total == 0 {
-                        eprintln!("No queries provided.");
-                        return Ok(());
-                    }
-
                         let shared_queries = Arc::new(queries);
-                    let shared_key = Arc::new(api_key);
 
-                    let per_thread = total / THREADS;
+                        let mut handles = Vec::new();
-
-                    let mut handles = Vec::with_capacity(THREADS);
                         for i in 0..THREADS {
-                        let queries_clone = Arc::clone(&shared_queries);
+                            let queries = Arc::clone(&shared_queries);
-                        let client_clone = Arc::clone(&client);
+                            let client = Arc::clone(&client);
-                        let key_clone = Arc::clone(&shared_key);
+                            let keys = Arc::clone(&keys);
+                            let start = i * per_thread;
+                            let end = if i == THREADS - 1 { total } else { start + per_thread };
 
-                        let start_index = i * per_thread;
+                            let handle = std::thread::spawn(move || {
-                        let end_index = if i == THREADS - 1 {
+                                let rt = tokio::runtime::Runtime::new().unwrap();
-                            total // Last thread gets the remainder
+                                for q in &queries[start..end] {
-                        } else {
+                                    rt.block_on(q.send_all(&client, &keys)).unwrap();
-                            start_index + per_thread
-                        };
-
-                        let handle = thread::spawn(move || {
-                            let rt = tokio::runtime::Runtime::new().expect("Failed to create runtime");
-                            for idx in start_index..end_index {
-                                let query = &queries_clone[idx];
-                                let send_result = rt.block_on(query.send(client_clone.clone(), &key_clone));
-
-                                match send_result {
-                                    Ok(response) => {
-                                        let body_result = rt.block_on(response.body());
-                                        match body_result {
-                                            Ok(body) => println!("{}", String::from_utf8_lossy(&body)),
-                                            Err(e) => eprintln!("Error reading response body: {:?}", e),
-                                        }
-                                    }
-                                    Err(e) => {
-                                        eprintln!("Request failed: {:?}", e);
-                                    }
-                                }
                                 }
                             });
 
                             handles.push(handle);
                         }
 
-                    // Wait for all threads to complete
+                        for h in handles {
-                    for handle in handles {
+                            h.join().expect("Thread panicked");
-                        handle.join().expect("A thread panicked");
                         }
                     }
+                    other => {
+                        let client = awc::Client::default();
+                        let keys = crate::load_api_keys()?;
+                        other.send_all(&client, &keys).await?;
+                    }
+                }
+            }
+        }
+    }).collect();
+
+    // Generate the final code
+    let expanded = quote! {
+        use clap::Parser;
+        use std::io::Read;
+
+        #[derive(clap::Parser, Debug)]
+        #input_enum
+
+        #[tokio::main]
+        async fn main() -> Result<(), Box<dyn std::error::Error>> {
+            let cmd = #top_enum_ident::parse();
+            match cmd {
+                #(#match_arms),*
+            }
+            Ok(())
         }
 
-            Ok(())
+        // Trait for dispatching API calls
+        pub trait ApiDispatch {
+            fn send_all(
+                &self,
+                client: &awc::Client,
+                keys: &std::collections::HashMap<String, crate::Keys>,
+            ) -> std::pin::Pin<Box<dyn std::future::Future<Output = Result<(), Box<dyn std::error::Error>>> + Send>>;
+        }
+    };
+
+    TokenStream::from(expanded)
+}
+
+#[proc_macro_attribute]
+pub fn api_dispatch(attr: TokenStream, item: TokenStream) -> TokenStream {
+    let input = parse_macro_input!(item as syn::ItemEnum);
+    let enum_ident = &input.ident;
+
+    // Parse attribute input: input = "MyQuery"
+    let meta_args = attr.to_string();
+    let input_type: syn::Ident = {
+        let cleaned = meta_args.trim().replace("input", "").replace('=', "").replace('"', "").trim().to_string();
+        syn::Ident::new(&cleaned, proc_macro2::Span::call_site())
+    };
+
+    let expanded = quote! {
+        #input
+
+        impl ApiDispatch for #enum_ident {
+            fn send_all(
+                &self,
+                client: &awc::Client,
+                keys: &std::collections::HashMap<String, crate::Keys>,
+            ) -> std::pin::Pin<Box<dyn std::future::Future<Output = Result<(), Box<dyn std::error::Error>>> + Send>> {
+                Box::pin(async move {
+                    match self {
+                        #enum_ident::Single { query } => {
+                            let parsed: #input_type = serde_json::from_str(query)?;
+                            parsed.send(client, keys).await?;
+                        }
+                        #enum_ident::Bulk { input } => {
+                            let json = if let Some(raw) = input {
+                                if std::path::Path::new(&raw).exists() {
+                                    std::fs::read_to_string(raw)?
+                                } else {
+                                    raw.clone()
+                                }
+                            } else {
+                                use std::io::Read;
+                                let mut buf = String::new();
+                                std::io::stdin().read_to_string(&mut buf)?;
+                                buf
+                            };
+
+                            let items: Vec<#input_type> = serde_json::from_str(&json)?;
+                            for item in items {
+                                item.send(client, keys).await?;
+                            }
+                        }
+                    }
+                    Ok(())
+                })
+            }
         }
     };