why does proc macro not work

cms/cms_macro/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "cms_macro"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+proc-macro=true
+
+[dependencies]
+quote = "1.0.9"
+proc-macro2 = "1.0.28"
+
+[dependencies.diesel]
+version = "1.4.4"
+features = ["postgres", "extras"]

cms/cms_macro/src/lib.rs

@@ -0,0 +1,311 @@
+extern crate proc_macro;
+#[macro_use]
+extern crate quote;
+
+use proc_macro2::*;
+use std::fmt::Debug;
+
+#[derive(Debug)]
+struct Row(Ident, Ident, Ident, Ident);
+
+fn api_route_inner(item: TokenStream) -> TokenStream {
+    let iterator = item.into_iter().clone().collect::<Vec<TokenTree>>();
+    let name = iterator[0].clone();
+    let name_literal = &iterator[0].clone().to_string();
+    let name_dir = format!("/{}", name_literal);
+    let name_add = format!("/{}/add", name_literal);
+    let name_upd = format!("/{}/upd", name_literal);
+    let name_del = format!("/{}/del", name_literal);
+    let name_api = format!("/<lang>/{}", name_literal);
+    let name_redir = format!("/ui/{}", name_literal);
+
+    let value_group = iterator[1].clone();
+
+    let (delim, stream) = match value_group {
+        TokenTree::Group(g) => (g.delimiter(), g.stream()),
+        n => panic!("Incorrect syntax at brace => {:?}", n),
+    };
+
+    assert_eq!(delim, Delimiter::Brace);
+    let splitted = &mut stream.into_iter().clone().collect::<Vec<TokenTree>>()[..]
+        .split(|token| {
+            if let TokenTree::Punct(p) = token.clone() {
+                p.as_char() == ',' && p.spacing() == Spacing::Alone
+            } else {
+                false
+            }
+        })
+        .map(Vec::from)
+        .collect::<Vec<Vec<TokenTree>>>();
+
+    splitted.pop();
+
+    let mut rows: Vec<Row> = vec![];
+
+    for vecs in splitted.into_iter() {
+        let mut vals_iter = vecs.split(|token| {
+            if let TokenTree::Punct(p) = token.clone() {
+                p.as_char() == ':' && p.spacing() == Spacing::Alone
+            } else {
+                false
+            }
+        });
+
+        let name = vals_iter.next().unwrap().to_vec();
+        let vals = vals_iter.next().unwrap().to_vec();
+        let (brack, val_stream) = match vals.get(0).unwrap() {
+            TokenTree::Group(g) => (g.delimiter(), g.stream()),
+            n => panic!("Incorrect syntax at parenthesis => {:?}", n),
+        };
+        assert_eq!(brack, Delimiter::Parenthesis);
+        assert_eq!(name.len(), 1);
+        let name = match name.get(0).unwrap() {
+            TokenTree::Ident(g) => g,
+            n => panic!("Incorrect syntax at name => {:?}", n),
+        };
+
+        let vals = &val_stream.into_iter().clone().collect::<Vec<TokenTree>>()[..]
+            .split(|token| {
+                if let TokenTree::Punct(p) = token.clone() {
+                    p.as_char() == ',' && p.spacing() == Spacing::Alone
+                } else {
+                    false
+                }
+            })
+            .map(|x| match x.to_vec().get(0).unwrap().clone() {
+                TokenTree::Ident(i) => i,
+                n => panic!("Incorrect syntax at group => {:?}", n),
+            })
+            .collect::<Vec<Ident>>();
+        rows.push(Row(
+            name.clone(),
+            vals.get(0).unwrap().clone(),
+            vals.get(1).unwrap().clone(),
+            vals.get(2).unwrap().clone(),
+        ));
+    }
+
+    let names_vec = rows
+        .iter()
+        .map(|x| TokenTree::Ident(x.0.clone()))
+        .collect::<Vec<TokenTree>>();
+
+    let schema_value = rows
+        .iter()
+        .map(|x| TokenTree::Ident(x.1.clone()))
+        .collect::<Vec<TokenTree>>();
+
+    let get_value = rows
+        .iter()
+        .map(|x| TokenTree::Ident(x.2.clone()))
+        .collect::<Vec<TokenTree>>();
+
+    let put_value = rows
+        .iter()
+        .map(|x| TokenTree::Ident(x.3.clone()))
+        .collect::<Vec<TokenTree>>();
+
+    let impl_value = rows
+        .iter()
+        .map(|x| {
+            if x.2.to_string() == x.3.to_string() {
+                let s = x.0.clone();
+                quote! {
+                    #s: self.#s,
+                }
+            } else {
+                let s = x.0.clone();
+                quote! {
+                    #s: *self.#s,
+                }
+            }
+        })
+        .collect::<Vec<TokenStream>>()
+        .into_iter()
+        .map(|x| x.into_iter().collect::<Vec<TokenTree>>())
+        .flatten()
+        .collect::<Vec<TokenTree>>();
+
+    let impls = quote! {
+
+        impl Post {
+            fn convert(self) -> Create {
+                Create {
+                    lang: self.lang,
+                    #(#impl_value)*
+                }
+            }
+        }
+
+        impl Update {
+            fn convert(self) -> Create {
+                Create {
+                    lang: self.lang,
+                    #(#impl_value)*
+                }
+            }
+        }
+    };
+
+    let schema = quote! {
+
+        pub mod schema {
+            table! {
+                use diesel::sql_types::*;
+
+                #name (id) {
+                    id -> Integer,
+                    lang -> Text,
+                    #(#names_vec -> #schema_value,)
+                    *
+                }
+            }
+        }
+    };
+
+    let structs = quote! {
+
+        use schema::#name;
+
+        #[derive(Debug, Clone, Queryable, Serialize)]
+        pub struct Get {
+            pub id: i32,
+            pub lang: String,
+            #(pub #names_vec: #get_value),
+            *
+        }
+
+        #[derive(Debug, AsChangeset, Insertable)]
+        #[table_name = #name_literal]
+        pub struct Create {
+            pub lang: String,
+            #(pub #names_vec: #get_value),
+            *
+        }
+
+        #[derive(Debug, FromForm)]
+        pub struct Post {
+            pub lang: String,
+            #(pub #names_vec: #put_value),
+            *
+        }
+
+        #[derive(Debug, FromForm)]
+        pub struct Update {
+            pub id: i32,
+            pub lang: String,
+            #(pub #names_vec: #put_value),
+            *
+        }
+
+        #[derive(Debug, FromForm)]
+        pub struct Delete {
+            pub id: i32,
+        }
+    };
+
+    let imports = quote! {
+        use crate::data::{defs::*, Lang};
+        use crate::auth::Token;
+        use ::chrono::naive::*;
+        use ::diesel::{prelude::*, Insertable, Queryable};
+        use ::rocket::{http::Status, request::Form, response::Redirect, State};
+        use ::rocket_contrib::{json::Json, templates::Template};
+        use ::serde::Serialize;
+        use ::std::{collections::*, sync::Mutex};
+    };
+
+    let endpoints = quote! {
+
+        pub fn create(conn: &PgConnection, create: Create) -> Result<Get, diesel::result::Error> {
+            diesel::insert_into(#name::table)
+                .values(&create)
+                .get_result(conn)
+        }
+
+        pub fn get(conn: &PgConnection, lg: Lang) -> Result<Vec<Get>, diesel::result::Error> {
+            use schema::#name::dsl::*;
+
+            #name.filter(lang.eq(lg.0)).load::<Get>(conn)
+        }
+
+        pub fn get_all(conn: &PgConnection) -> Result<Vec<Get>, diesel::result::Error> {
+            use schema::#name::dsl::*;
+            #name.load::<Get>(conn)
+        }
+
+        pub fn update(
+            conn: &PgConnection,
+            idn: i32,
+            create: Create,
+        ) -> Result<Get, diesel::result::Error> {
+            use schema::#name::dsl::*;
+            diesel::update(#name.find(idn))
+                .set(&create)
+                .get_result::<Get>(conn)
+        }
+
+        pub fn delete(conn: &PgConnection, idn: i32) -> Result<usize, diesel::result::Error> {
+            use schema::#name::dsl::*;
+            diesel::delete(#name.find(idn)).execute(conn)
+        }
+
+        #[get(#name_api)]
+        pub fn api(pg: State<Mutex<PgConnection>>, lang: Lang) -> Result<Json<Vec<Get>>, Status> {
+            Ok(Json(
+                get(&*(pg.lock().unwrap()), lang).map_err(|_| Status::InternalServerError)?,
+            ))
+        }
+
+        #[post(#name_add, data = "<form>")]
+        pub fn add(_token: Token, pg: State<Mutex<PgConnection>>, form: Form<Post>) -> Result<Redirect, Status> {
+            match create(&*(pg.lock().unwrap()), form.into_inner().convert()) {
+                Ok(_) => Ok(Redirect::to(#name_redir)),
+                Err(_) => Err(Status::InternalServerError),
+            }
+        }
+
+        #[post(#name_del, data = "<form>")]
+        pub fn del(_token: Token, pg: State<Mutex<PgConnection>>, form: Form<Delete>) -> Result<Redirect, Status> {
+            match delete(&*(pg.lock().unwrap()), form.id) {
+                Ok(_) => Ok(Redirect::to(#name_redir)),
+                Err(_) => Err(Status::InternalServerError),
+            }
+        }
+
+        #[post(#name_upd, data = "<form>")]
+        pub fn upd(_token: Token, pg: State<Mutex<PgConnection>>, form: Form<Update>) -> Result<Redirect, Status> {
+            match update(&*(pg.lock().unwrap()), form.id, form.into_inner().convert()) {
+                Ok(_) => Ok(Redirect::to(#name_redir)),
+                Err(_) => Err(Status::InternalServerError),
+            }
+        }
+
+        #[get(#name_dir)]
+        pub fn ui(_token: Token, pg: State<Mutex<PgConnection>>) -> Result<Template, Status> {
+            let ctx = get_all(&*(pg.lock().unwrap()))
+                .map_err(|_| Status::InternalServerError)?
+                .iter()
+                .map(|x| (x.id, x.clone()))
+                .collect::<HashMap<i32, Get>>();
+            Ok(Template::render(#name_literal, &ctx))
+        }
+    };
+
+    let tok = quote! {
+        pub mod #name {
+            #imports
+            #schema
+            #structs
+            #impls
+            #endpoints
+        }
+    };
+
+    tok.into()
+}
+
+#[proc_macro]
+pub fn api_route(item: proc_macro::TokenStream) -> proc_macro::TokenStream {
+    api_route_inner(TokenStream::from(item)).into()
+}