add proc macro derive for openapitype

Cargo.lock

@@ -213,6 +213,19 @@ dependencies = [
  "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "example"
+version = "0.0.1"
+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)",
+]
+
 [[package]]
 name = "failure"
 version = "0.1.5"
@@ -328,19 +341,26 @@ dependencies = [
 ]
 
 [[package]]
-name = "gotham-restful"
+name = "gotham_derive"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "gotham_restful"
 version = "0.0.1"
 dependencies = [
  "chrono 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "fake 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "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)",
  "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)",
- "log4rs 0.8.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "openapiv3 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -348,12 +368,15 @@ dependencies = [
 ]
 
 [[package]]
-name = "gotham_derive"
+name = "gotham_restful_derive"
-version = "0.4.0"
+version = "0.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fake 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)",
+ "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)",
+ "proc-macro2 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]

Cargo.toml

@@ -1,39 +1,8 @@
 # -*- eval: (cargo-minor-mode 1) -*-
 
-[package]
+[workspace]
-name = "gotham-restful"
+members = [
-version = "0.0.1"
+	"gotham_restful",
-authors = ["Dominic Meiser <git@msrd0.de>"]
+	"gotham_restful_derive",
-edition = "2018"
+	"example"
-description = "RESTful additions for Gotham"
+]
-keywords = ["gotham", "rest", "restful"]
-license = "EPL-2.0"
-readme = "README.md"
-include = ["src/**/*", "Cargo.toml", "LICENSE"]
-repository = "https://gitlab.com/msrd0/gotham-restful"
-
-[badges]
-gitlab = { repository = "msrd0/gotham-restful", branch = "master" }
-
-[dependencies]
-chrono = { version = "0.4", optional = true }
-failure = "0.1"
-futures = "0.1"
-gotham = "0.4"
-gotham_derive = "0.4"
-hyper = "0.12"
-indexmap = { version = "1.0", optional = true }
-log = { version = "0.4", optional = true }
-mime = "0.3"
-openapiv3 = { version = "0.3", optional = true }
-serde = { version = "1", features = ["derive"] }
-serde_json = "1"
-
-[dev-dependencies]
-fake = "2.2"
-log = "0.4"
-log4rs = { version = "0.8", features = ["console_appender"], default-features = false }
-
-[features]
-default = ["openapi", "chrono"]
-openapi = ["indexmap", "log", "openapiv3"]

example/Cargo.toml

@@ -0,0 +1,28 @@
+# -*- eval: (cargo-minor-mode 1) -*-
+
+[package]
+name = "example"
+version = "0.0.1"
+authors = ["Dominic Meiser <git@msrd0.de>"]
+edition = "2018"
+license = "Unlicense"
+readme = "README.md"
+include = ["src/**/*", "Cargo.toml", "LICENSE"]
+repository = "https://gitlab.com/msrd0/gotham-restful"
+
+[badges]
+gitlab = { repository = "msrd0/gotham-restful", branch = "master" }
+
+[dependencies]
+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"
+
+[dev-dependencies]
+fake = "2.2"
+log = "0.4"
+log4rs = { version = "0.8", features = ["console_appender"], default-features = false }

example/LICENSE

@@ -0,0 +1,24 @@
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <http://unlicense.org>

example/src/main.rs

@@ -1,4 +1,5 @@
 #[macro_use] extern crate log;
+#[macro_use] extern crate gotham_restful_derive;
 
 use fake::{faker::internet::en::Username, Fake};
 use gotham::{
@@ -14,6 +15,7 @@ use log4rs::{
 	config::{Appender, Config, Root},
 	encode::pattern::PatternEncoder
 };
+use serde::{Deserialize, Serialize};
 
 rest_resource!{Users, route => {
 	route.read_all::<Self, _>();
@@ -23,9 +25,10 @@ rest_resource!{Users, route => {
 	route.update::<Self, _, _, _>();
 }}
 
-rest_struct!{User {
+#[derive(Deserialize, OpenapiType, Serialize)]
+struct User {
 	username : String
-}}
+}
 
 impl ResourceReadAll<Success<Vec<Option<User>>>> for Users
 {

gotham_restful/Cargo.toml

@@ -0,0 +1,34 @@
+# -*- eval: (cargo-minor-mode 1) -*-
+
+[package]
+name = "gotham_restful"
+version = "0.0.1"
+authors = ["Dominic Meiser <git@msrd0.de>"]
+edition = "2018"
+description = "RESTful additions for Gotham"
+keywords = ["gotham", "rest", "restful"]
+license = "EPL-2.0"
+readme = "../README.md"
+include = ["src/**/*", "Cargo.toml", "../LICENSE"]
+repository = "https://gitlab.com/msrd0/gotham-restful"
+
+[badges]
+gitlab = { repository = "msrd0/gotham-restful", branch = "master" }
+
+[dependencies]
+chrono = { version = "0.4", optional = true }
+failure = "0.1"
+futures = "0.1"
+gotham = "0.4"
+gotham_derive = "0.4"
+hyper = "0.12"
+indexmap = { version = "1.0", optional = true }
+log = { version = "0.4", optional = true }
+mime = "0.3"
+openapiv3 = { version = "0.3", optional = true }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+
+[features]
+default = ["openapi", "chrono"]
+openapi = ["indexmap", "log", "openapiv3"]

gotham_restful_derive/Cargo.toml

@@ -0,0 +1,33 @@
+# -*- eval: (cargo-minor-mode 1) -*-
+
+[package]
+name = "gotham_restful_derive"
+version = "0.0.1"
+authors = ["Dominic Meiser <git@msrd0.de>"]
+edition = "2018"
+description = "RESTful additions for Gotham - Derive"
+keywords = ["gotham", "rest", "restful", "derive"]
+license = "EPL-2.0"
+readme = "../README.md"
+include = ["src/**/*", "Cargo.toml", "../LICENSE"]
+repository = "https://gitlab.com/msrd0/gotham-restful"
+
+[lib]
+proc-macro = true
+
+[badges]
+gitlab = { repository = "msrd0/gotham-restful", branch = "master" }
+
+[dependencies]
+proc-macro2 = "1"
+quote = "1"
+syn = { version = "1", features = ["extra-traits", "full"] }
+
+[dev-dependencies]
+fake = "2.2"
+log = "0.4"
+log4rs = { version = "0.8", features = ["console_appender"], default-features = false }
+
+[features]
+default = ["openapi"]
+openapi = []

gotham_restful_derive/src/lib.rs

@@ -0,0 +1,13 @@
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+
+#[cfg(feature = "openapi")]
+mod openapi_type;
+
+#[cfg(feature = "openapi")]
+#[proc_macro_derive(OpenapiType)]
+pub fn derive_openapi_type(tokens : TokenStream) -> TokenStream
+{
+	openapi_type::expand(tokens)
+}

gotham_restful_derive/src/openapi_type.rs

@@ -0,0 +1,99 @@
+use proc_macro::TokenStream;
+use proc_macro2::TokenStream as TokenStream2;
+use quote::quote;
+use syn::{
+	Field,
+	Fields,
+	ItemStruct,
+	parse_macro_input
+};
+
+fn expand_field(field : &Field) -> TokenStream2
+{
+	let ident = match &field.ident {
+		Some(ident) => ident,
+		None => panic!("Fields without ident are not supported")
+	};
+	let ty = &field.ty;
+	
+	quote! {{
+		let mut schema = <#ty>::to_schema();
+		
+		if schema.nullable
+		{
+			schema.nullable = false;
+			schema.name = schema.name.map(|name|
+				if name.ends_with("OrNull") { name[..(name.len()-6)].to_string() } else { name });
+		}
+		else
+		{
+			required.push(stringify!(#ident).to_string());
+		}
+		
+		match schema.name.clone() {
+			Some(name) => {
+				properties.insert(
+					stringify!(#ident).to_string(),
+					ReferenceOr::Reference { reference: format!("#/components/schemas/{}", name) }
+				);
+				dependencies.insert(name, schema);
+			},
+			None => {
+				properties.insert(
+					stringify!(#ident).to_string(),
+					ReferenceOr::Item(Box::new(<#ty>::to_schema().to_schema()))
+				);
+			}
+		}
+	}}
+}
+
+pub fn expand(tokens : proc_macro::TokenStream) -> TokenStream
+{
+	let input = parse_macro_input!(tokens as ItemStruct);
+	
+	let ident = input.ident;
+	let generics = input.generics;
+	
+	let fields : Vec<TokenStream2> = match input.fields {
+		Fields::Named(fields) => {
+			fields.named.iter().map(|field| expand_field(field)).collect()
+		},
+		Fields::Unnamed(_) => panic!("Unnamed fields are not supported"),
+		Fields::Unit => Vec::new()
+	};
+	
+	let output = quote!{
+		impl #generics ::gotham_restful::OpenapiType for #ident #generics
+		{
+			fn to_schema() -> ::gotham_restful::OpenapiSchema
+			{
+				use ::gotham_restful::{helper::openapi::*, OpenapiSchema};
+				
+				let mut properties : IndexMap<String, ReferenceOr<Box<Schema>>> = IndexMap::new();
+				let mut required : Vec<String> = Vec::new();
+				let mut dependencies : IndexMap<String, OpenapiSchema> = IndexMap::new();
+				
+				#(#fields)*
+				
+				let schema = SchemaKind::Type(Type::Object(ObjectType {
+					properties,
+					required,
+					additional_properties: None,
+					min_properties: None,
+					max_properties: None
+				}));
+
+				OpenapiSchema {
+					name: Some(stringify!(#ident).to_string()),
+					nullable: false,
+					schema,
+					dependencies
+				}
+			}
+		}
+	};
+	
+	eprintln!("output: {}", output);
+	output.into()
+}