add derive macro for resource

Cargo.lock

@@ -220,7 +220,6 @@ dependencies = [
  "fake 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gotham 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gotham_restful 0.0.1",
- "gotham_restful_derive 0.0.1",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "log4rs 0.8.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -358,6 +357,7 @@ dependencies = [
  "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
  "gotham 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gotham_derive 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gotham_restful_derive 0.0.1",
  "hyper 0.12.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "indexmap 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",

example/Cargo.toml

@@ -17,7 +17,6 @@ gitlab = { repository = "msrd0/gotham-restful", branch = "master" }
 fake = "2.2"
 gotham = "0.4"
 gotham_restful = { path = "../gotham_restful", features = ["openapi"] }
-gotham_restful_derive = { path = "../gotham_restful_derive", features = ["openapi"] }
 log = "0.4"
 log4rs = { version = "0.8", features = ["console_appender"], default-features = false }
 serde = "1"

example/src/main.rs

@@ -1,5 +1,4 @@
 #[macro_use] extern crate log;
-#[macro_use] extern crate gotham_restful_derive;
 
 use fake::{faker::internet::en::Username, Fake};
 use gotham::{
@@ -17,13 +16,19 @@ use log4rs::{
 };
 use serde::{Deserialize, Serialize};
 
-rest_resource!{Users, route => {
-	route.read_all::<Self, _>();
-	route.read::<Self, _, _>();
-	route.create::<Self, _, _>();
-	route.update_all::<Self, _, _>();
-	route.update::<Self, _, _, _>();
-}}
+#[derive(Resource)]
+#[rest_resource(ReadAll, Read, Create, DeleteAll, Delete, Update, UpdateAll)]
+struct Users
+{
+}
+
+// rest_resource!{Users, route => {
+// 	route.read_all::<Self, _>();
+// 	route.read::<Self, _, _>();
+// 	route.create::<Self, _, _>();
+// 	route.update_all::<Self, _, _>();
+// 	route.update::<Self, _, _, _>();
+// }}
 
 #[derive(Deserialize, OpenapiType, Serialize)]
 struct User

gotham_restful/Cargo.toml

@@ -21,6 +21,7 @@ failure = "0.1"
 futures = "0.1"
 gotham = "0.4"
 gotham_derive = "0.4"
+gotham_restful_derive = { path = "../gotham_restful_derive" }
 hyper = "0.12"
 indexmap = { version = "1.0", optional = true }
 log = { version = "0.4", optional = true }
@@ -30,5 +31,5 @@ serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 
 [features]
-default = ["openapi", "chrono"]
-openapi = ["indexmap", "log", "openapiv3"]
+default = []
+openapi = ["gotham_restful_derive/openapi", "indexmap", "log", "openapiv3"]

gotham_restful/src/lib.rs

@@ -4,6 +4,17 @@
 pub use hyper::StatusCode;
 use serde::{de::DeserializeOwned, Serialize};
 
+pub use gotham_restful_derive::*;
+/// Not public API
+#[doc(hidden)]
+pub mod export
+{
+	#[cfg(feature = "openapi")]
+	pub use indexmap::IndexMap;
+	#[cfg(feature = "openapi")]
+	pub use openapiv3;
+}
+
 pub mod helper;
 
 #[cfg(feature = "openapi")]

gotham_restful/src/openapi/types.rs

@@ -5,8 +5,10 @@ use chrono::{
 use indexmap::IndexMap;
 use openapiv3::{
 	ArrayType, IntegerType, NumberType, ObjectType, ReferenceOr::Item, ReferenceOr::Reference, Schema,
-	SchemaData, SchemaKind, StringFormat, StringType, Type, VariantOrUnknownOrEmpty
+	SchemaData, SchemaKind, StringType, Type
 };
+#[cfg(feature = "chrono")]
+use openapiv3::{StringFormat, VariantOrUnknownOrEmpty};
 
 #[derive(Debug, Clone, PartialEq)]
 pub struct OpenapiSchema

gotham_restful_derive/src/lib.rs

@@ -4,6 +4,8 @@ use proc_macro::TokenStream;
 
 mod method;
 use method::{expand_method, Method};
+mod resource;
+use resource::expand_resource;
 #[cfg(feature = "openapi")]
 mod openapi_type;
 
@@ -14,6 +16,12 @@ pub fn derive_openapi_type(tokens : TokenStream) -> TokenStream
 	openapi_type::expand(tokens)
 }
 
+#[proc_macro_derive(Resource, attributes(rest_resource))]
+pub fn derive_resource(tokens : TokenStream) -> TokenStream
+{
+	expand_resource(tokens)
+}
+
 #[proc_macro_attribute]
 pub fn rest_read_all(attr : TokenStream, item : TokenStream) -> TokenStream
 {

gotham_restful_derive/src/method.rs

@@ -7,6 +7,7 @@ use syn::{
 	ReturnType,
 	parse_macro_input
 };
+use std::str::FromStr;
 
 pub enum Method
 {
@@ -19,9 +20,27 @@ pub enum Method
 	Delete
 }
 
+impl FromStr for Method
+{
+	type Err = String;
+	fn from_str(str : &str) -> Result<Self, Self::Err>
+	{
+		match str {
+			"ReadAll" | "read_all" => Ok(Self::ReadAll),
+			"Read" | "read" => Ok(Self::Read),
+			"Create" | "create" => Ok(Self::Create),
+			"UpdateAll" | "update_all" => Ok(Self::UpdateAll),
+			"Update" | "update" => Ok(Self::Update),
+			"DeleteAll" | "delete_all" => Ok(Self::DeleteAll),
+			"Delete" | "delete" => Ok(Self::Delete),
+			_ => Err("unknown method".to_string())
+		}
+	}
+}
+
 impl Method
 {
-	fn trait_ident(&self) -> Ident
+	pub fn trait_ident(&self) -> Ident
 	{
 		use Method::*;
 		
@@ -37,7 +56,7 @@ impl Method
 		format_ident!("Resource{}", name)
 	}
 	
-	fn fn_ident(&self) -> Ident
+	pub fn fn_ident(&self) -> Ident
 	{
 		use Method::*;
 		
@@ -52,6 +71,11 @@ impl Method
 		};
 		format_ident!("{}", name)
 	}
+	
+	pub fn setup_ident(&self) -> Ident
+	{
+		format_ident!("{}_setup_impl", self.fn_ident())
+	}
 }
 
 pub fn expand_method(method : Method, attrs : TokenStream, item : TokenStream) -> TokenStream
@@ -87,6 +111,7 @@ pub fn expand_method(method : Method, attrs : TokenStream, item : TokenStream) -
 	
 	let trait_ident = method.trait_ident();
 	let fn_ident = method.fn_ident();
+	let setup_ident = method.setup_ident();
 	
 	let output = quote! {
 		impl ::gotham_restful::#trait_ident<#(#generics),*> for #ident
@@ -98,6 +123,12 @@ pub fn expand_method(method : Method, attrs : TokenStream, item : TokenStream) -
 				#ret_stmt
 			}
 		}
+		
+		#[deny(dead_code)]
+		fn #setup_ident<D : ::gotham_restful::DrawResourceRoutes>(route : &mut D)
+		{
+			route.#fn_ident::<#ident, #(#generics),*>();
+		}
 	};
 	output.into()
 }

gotham_restful_derive/src/resource.rs

@@ -0,0 +1,60 @@
+use crate::method::Method;
+use proc_macro::TokenStream;
+use proc_macro2::TokenStream as TokenStream2;
+use quote::quote;
+use syn::{
+	parse::{Parse, ParseStream, Result as SynResult},
+	punctuated::Punctuated,
+	token::Comma,
+	Ident,
+	ItemStruct,
+	parenthesized,
+	parse_macro_input
+};
+use std::str::FromStr;
+
+struct MethodList(Punctuated<Ident, Comma>);
+
+impl Parse for MethodList
+{
+	fn parse(input: ParseStream) -> SynResult<Self>
+	{
+		let content;
+		let _paren = parenthesized!(content in input);
+		let list : Punctuated<Ident, Comma> = Punctuated::parse_separated_nonempty(&content)?;
+		Ok(Self(list))
+	}
+}
+
+pub fn expand_resource(tokens : TokenStream) -> TokenStream
+{
+	let input = parse_macro_input!(tokens as ItemStruct);
+	let ident = input.ident;
+	
+	let methods : Vec<TokenStream2> = input.attrs.into_iter().filter(|attr|
+		attr.path.segments.iter().last().map(|segment| segment.ident.to_string()) == Some("rest_resource".to_string()) // TODO wtf
+	).flat_map(|attr| {
+		let m : MethodList = syn::parse2(attr.tokens).expect("unable to parse attributes");
+		m.0.into_iter()
+	}).map(|method| {
+		let method = Method::from_str(&method.to_string()).expect("unknown method");
+		let ident = method.setup_ident();
+		quote!(#ident(&mut route);)
+	}).collect();
+	
+	let output = quote! {
+		impl ::gotham_restful::Resource for #ident
+		{
+			fn name() -> String
+			{
+				stringify!(#ident).to_string()
+			}
+			
+			fn setup<D : ::gotham_restful::DrawResourceRoutes>(mut route : D)
+			{
+				#(#methods)*
+			}
+		}
+	};
+	output.into()
+}