From bb7fb5e5ce9e0fc09da3e5a1086561f0a9e2adb4 Mon Sep 17 00:00:00 2001
From: Yiffy Dev <yiffyrusdev@yandex.ru>
Date: Wed, 30 Oct 2024 16:33:50 +0500
Subject: [PATCH] first-approach implementation of nesting selectors

---
 examples/use-styles/Cargo.lock          |  8 +++---
 examples/use-styles/src/main.rs         |  4 +++
 sabry_intrnl/src/scoper/mod.rs          |  2 +-
 sabry_procmacro_impl/src/impls/styly.rs | 33 +++++++++++++++++++++++--
 4 files changed, 40 insertions(+), 7 deletions(-)

diff --git a/examples/use-styles/Cargo.lock b/examples/use-styles/Cargo.lock
index 7e7c03c..00f3e98 100644
--- a/examples/use-styles/Cargo.lock
+++ b/examples/use-styles/Cargo.lock
@@ -1003,7 +1003,7 @@ dependencies = [
 
 [[package]]
 name = "sabry_build"
-version = "0.0.0"
+version = "0.0.1"
 dependencies = [
  "proc-macro2",
  "sabry_intrnl",
@@ -1015,7 +1015,7 @@ dependencies = [
 
 [[package]]
 name = "sabry_intrnl"
-version = "0.0.0"
+version = "0.0.1"
 dependencies = [
  "base64",
  "blake3",
@@ -1033,14 +1033,14 @@ dependencies = [
 
 [[package]]
 name = "sabry_procmacro"
-version = "0.0.0"
+version = "0.0.1"
 dependencies = [
  "sabry_procmacro_impl",
 ]
 
 [[package]]
 name = "sabry_procmacro_impl"
-version = "0.0.0"
+version = "0.0.1"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/examples/use-styles/src/main.rs b/examples/use-styles/src/main.rs
index 6751b2c..6cdf59d 100644
--- a/examples/use-styles/src/main.rs
+++ b/examples/use-styles/src/main.rs
@@ -5,6 +5,9 @@ styly!(pub const bundlemod {
     .someth {
         @include tokens.clickable;
         background-color: black;
+        &-dark {
+            background-color: white;
+        }
     }
 });
 
@@ -13,5 +16,6 @@ styly!(pub const filemod:sass "src/main.sass");
 fn main(){
     println!("someth class codemod styles: {}", bundlemod::someth);
     println!("someth class filemod styles: {}", filemod::someth);
+    println!("someth-dark selector will be: {}", bundlemod::_dark(bundlemod::someth));
     println!("Thats how we used the styles! Good luck!!");
 }
diff --git a/sabry_intrnl/src/scoper/mod.rs b/sabry_intrnl/src/scoper/mod.rs
index 824aed7..658e8f0 100644
--- a/sabry_intrnl/src/scoper/mod.rs
+++ b/sabry_intrnl/src/scoper/mod.rs
@@ -294,7 +294,7 @@ impl ScopedSelector {
     }
 }
 
-fn apply_basic_rusty_member_gen_rules(source: &str) -> String {
+pub fn apply_basic_rusty_member_gen_rules(source: &str) -> String {
     let omit_regex = Regex::new(r"(^\-)|(\-$)|[^a-zA-Z0-9\-\_]")
         .expect("BUG: can not build omition regex for rusty member generation");
 
diff --git a/sabry_procmacro_impl/src/impls/styly.rs b/sabry_procmacro_impl/src/impls/styly.rs
index 9d6b0ed..56a977c 100644
--- a/sabry_procmacro_impl/src/impls/styly.rs
+++ b/sabry_procmacro_impl/src/impls/styly.rs
@@ -3,7 +3,7 @@ use quote::quote;
 use sabry_intrnl::{
     compiler::CompilerAdapter,
     config::SabryConfig,
-    scoper::{ArbitraryScope, ScopedSelector},
+    scoper::{apply_basic_rusty_member_gen_rules, ArbitraryScope, ScopedSelector},
 };
 use syn::{parse::Parse, Ident, Token};
 
@@ -67,7 +67,7 @@ pub fn styly_macro_impl(input: TokenStream) -> TokenStream {
     match ms.generator {
         ScopeGenerator::Module { public, constant } => {
             let scope_hash = scope.hash.as_str();
-            let scope_ident = scope.original_scope.name;
+            let scope_ident = scope.original_scope.name.clone();
             let scope_wrapper_ident =
                 syn::parse_str::<Ident>(&scope_ident.to_string().to_uppercase())
                     .expect("BUG: We just converted valid Ident to string and uppercased");
@@ -77,6 +77,33 @@ pub fn styly_macro_impl(input: TokenStream) -> TokenStream {
                 quote! {}
             };
 
+            let nests = scope.original_scope.adapter().nesting_selectors();
+            let special_nesting_members = nests
+                .iter()
+                .filter_map(|ns| {
+                    ns.suffix.clone().and_then(|s| {
+                        let interp = s
+                            .as_sass_interpolated()
+                            .and_then(|i| i.elements.first())
+                            .and_then(|e| e.as_static())
+                            .and_then(|s| Some(s.raw.to_string()));
+
+                        interp
+                    })
+                })
+                .map(|s| {
+                    let ident = apply_basic_rusty_member_gen_rules(&s);
+                    let fnident = syn::parse_str::<Ident>(format!("_{ident}").as_str())
+                        .expect("BUG: invalid ident for nesting selector formed");
+                    let formatstr = format!("{{c}}{}", &s);
+                    let doc = format!("Nesting selector. Originated from '&{s}'");
+
+                    quote! {
+                        #[doc = #doc]
+                        pub fn #fnident(c: &str) -> String {format!(#formatstr)}
+                    }
+                });
+
             let scope_members = scope
                 .hashed_selectors
                 .iter()
@@ -133,6 +160,7 @@ pub fn styly_macro_impl(input: TokenStream) -> TokenStream {
                     #[doc = #mod_docs]
                     #scope_vis mod #scope_ident {
                         #(#scope_members)*
+                        #(#special_nesting_members)*
                     }
                 }
             } else {
@@ -142,6 +170,7 @@ pub fn styly_macro_impl(input: TokenStream) -> TokenStream {
                     #[doc = #mod_docs]
                     #scope_vis mod #scope_ident {
                         #(#scope_members)*
+                        #(#special_nesting_members)*
                     }
                 }
             }