refactor: Created a derive macro for defining the display style of Enum models and removed the use of the EnumDisplayStyle trait

proc_macros/enum_display_style_derive/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "enum_display_style_derive"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+quote = "1.0.39"
+syn = "2.0.99"
+darling = "0.20.10"

proc_macros/enum_display_style_derive/src/lib.rs

@@ -0,0 +1,73 @@
+mod macro_models;
+
+use crate::macro_models::DisplayStyleArgs;
+use darling::FromVariant;
+use quote::quote;
+use syn::{parse_macro_input, Data, DeriveInput};
+/// Derive macro for the EnumDisplayStyle trait.
+/// 
+/// # Example
+/// 
+/// Using default values for the display style:
+/// 
+/// ```
+/// use enum_display_style_derive::EnumDisplayStyle;
+/// 
+/// #[derive(EnumDisplayStyle)]
+/// enum Weekend {
+///   Saturday,
+///   Sunday,
+/// }
+/// 
+/// assert_eq!(Weekend::Saturday.to_display_str(), "Saturday");
+/// assert_eq!(Weekend::Sunday.to_display_str(), "Sunday");
+/// 
+/// ```
+/// 
+/// Using custom values for the display style:
+/// 
+/// ```
+/// use enum_display_style_derive::EnumDisplayStyle;
+/// 
+/// #[derive(EnumDisplayStyle)]
+/// enum MonitorStatus {
+///   #[display_style(name = "Monitor Transactions")]
+///   Active,
+///   #[display_style(name = "Don't Monitor Transactions")]
+///   None,
+/// }
+/// 
+/// assert_eq!(MonitorStatus::Active.to_display_str(), "Monitor Transactions");
+/// assert_eq!(MonitorStatus::None.to_display_str(), "Don't Monitor Transactions");
+/// ```
+#[proc_macro_derive(EnumDisplayStyle, attributes(display_style))]
+pub fn enum_display_style_derive(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+  let input = parse_macro_input!(input as DeriveInput);
+  let enum_name = &input.ident;
+
+  let mut match_arms = Vec::new();
+
+  if let Data::Enum(data_enum) = &input.data {
+    let variants = &data_enum.variants;
+
+    for variant in variants {
+      let variant_ident = &variant.ident;
+      let variant_display_name = DisplayStyleArgs::from_variant(variant).unwrap().name.unwrap_or_else(|| variant_ident.to_string());
+      
+      match_arms.push(quote! {
+        #enum_name::#variant_ident => #variant_display_name,
+      });
+    }
+  }
+
+  quote! {
+    impl<'a> #enum_name {
+      pub fn to_display_str(self) -> &'a str {
+        match self {
+          #(#match_arms)*
+        }
+      }
+    }
+  }
+  .into()
+}

proc_macros/enum_display_style_derive/src/macro_models.rs

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+use darling::FromVariant;
+
+#[derive(Debug, FromVariant)]
+#[darling(attributes(display_style))]
+pub struct DisplayStyleArgs {
+	pub name: Option<String>
+}